JP2013075562A - Electric driving vehicle - Google Patents

Abstract

[PROBLEMS] To know how far a driver can travel and to travel safely.
A power storage device, a power generation device, an engine, a drive motor, a current position detection unit, a route search processing unit for searching for a travelable route along a road on which an electrically driven vehicle can travel, A travelable time calculation processing unit that calculates a travelable time based on energy consumption, a travelable distance calculation processing unit that calculates a travelable distance, a travelable range calculation processing unit that calculates a travelable range, and a travelable And a travelable range display processing means for displaying the range on the display unit 43.
[Selection] Figure 1

Description

  The present invention relates to an electrically driven vehicle.

  2. Description of the Related Art Conventionally, an electrically driven vehicle such as an electric vehicle, for example, an electric vehicle includes a vehicle drive device, and the drive motor is driven by electric power supplied from a battery, and the torque of the drive motor, that is, the drive motor. It is made to drive | work by generating a torque and transmitting this drive motor torque to a drive wheel.

  However, in the battery, the energy density representing the capacity per unit weight cannot be sufficiently increased, and thus represents the distance that can be traveled when the electric vehicle is driven using the power supplied from the battery. It is not possible to increase the travelable distance, the travelable time representing the travelable time, and the like. In order to increase the travelable distance, the travelable time, etc., it is necessary to increase the capacity of the battery. In this case, the battery not only increases in size but also increases in weight. As a result, the electric vehicle becomes large and the weight of the electric vehicle increases.

  Therefore, in order to increase the travelable distance, travelable time, etc., a generator was installed in addition to the battery, and the generator was driven by the engine to generate current and supply it to the battery. Hybrid type vehicles are provided as electrically driven vehicles.

  In the hybrid type vehicle, the remaining amount of the battery representing the degree of charge (charged amount) of the battery, the remaining amount of fuel for driving the engine, that is, the remaining amount of fuel, and the past traveling state of the hybrid type vehicle. Based on this, the travelable distance is calculated and displayed on a screen formed on the display unit (see, for example, Patent Document 1).

JP 2001-231103 A

  However, in the conventional hybrid type vehicle, since it is necessary to adjust the output of the generator in accordance with the traveling load applied to the hybrid type vehicle, the control in the control unit becomes complicated and the power generation efficiency becomes low. End up.

  Therefore, a hybrid vehicle in which the generator is driven at a constant output with high power generation efficiency can be considered. In that case, the time required to drive the generator at a constant output, that is, the necessary power generation time is considered. Since it differs depending on the remaining battery level, the travelable distance cannot be accurately calculated based on the remaining battery level and the power generation energy generated by power generation.

  Therefore, when the hybrid vehicle is driven without setting the destination, the driver cannot know how far the vehicle can be driven and cannot drive the hybrid vehicle with peace of mind.

  The present invention solves the problems of the conventional hybrid type vehicle, and provides an electric drive vehicle that allows the driver to know how far the vehicle can travel and to travel safely. Objective.

  Therefore, in the electrically driven vehicle of the present invention, the power storage device, the power generation device, the engine that drives the power generation device, the power storage device and the power generation device are connected, and the electric power supplied from the power storage device and the power generation device is used. Based on the drive motor to be driven, the current position detection unit for detecting the current position, and the road information, the current position is set as the departure point, and a route that can drive the electrically driven vehicle is searched for as a travelable path. Calculate energy consumption per distance by calculating power consumption required when the route search processing means and the electrically driven vehicle travel along the travelable route, and calculating energy consumption per distance based on the power consumption and the average vehicle speed Based on the processing means and the energy consumption per distance, the electric drive vehicle can travel along the travelable route. A travelable time calculation processing unit that calculates time, a travelable distance calculation processing unit that calculates a travelable distance based on the travelable time and the average vehicle speed, and an electrically driven vehicle that can travel based on the travelable distance The vehicle includes a travelable range calculation processing unit that calculates a travelable range that can travel along the route, and a travelable range display processing unit that displays the travelable range on a display unit.

  According to the present invention, in the electrically driven vehicle, the power storage device, the power generation device, the engine that drives the power generation device, the power storage device and the power generation device are connected, and the electric power supplied from the power storage device and the power generation device is used. Based on the drive motor to be driven, the current position detection unit for detecting the current position, and the road information, the current position is set as the departure point, and a route that can drive the electrically driven vehicle is searched for as a travelable path. Calculate energy consumption per distance by calculating power consumption required when the route search processing means and the electrically driven vehicle travel along the travelable route, and calculating energy consumption per distance based on the power consumption and the average vehicle speed Based on the processing means and the energy consumption per distance, the electric drive vehicle can travel along the travelable route. A travelable time calculation processing means for calculating the travelable distance, a travelable distance calculation processing means for calculating a travelable distance based on the travelable time and the average vehicle speed, and a travelable route for the electrically driven vehicle based on the travelable distance. A travelable range calculation processing unit that calculates a travelable range in which the travelable range can be traveled along, and a travelable range display processing unit that displays the travelable range on a display unit.

  In this case, the travelable time is calculated based on the energy consumed per distance, the travelable distance is calculated based on the travelable time and the average vehicle speed, and the electrically driven vehicle can travel based on the travelable distance. The travelable range is calculated and displayed on the display unit.

  Therefore, when driving an electrically driven vehicle without setting a destination, the driver can easily know how far the vehicle can travel and can drive the electrically driven vehicle with peace of mind.

It is a figure which shows the vehicle drive device in the 1st Embodiment of this invention. It is a conceptual diagram of the hybrid type vehicle in the 1st Embodiment of this invention. It is a main flowchart which shows operation | movement of the control part in the 1st Embodiment of this invention. It is a figure which shows the subroutine of the energy consumption calculation process per distance in the 1st Embodiment of this invention. It is a figure which shows the subroutine of the HV driving | running | working possible time calculation process in the 1st Embodiment of this invention. It is a figure which shows the subroutine of EV driving | running | working possible time calculation processing in the 1st Embodiment of this invention. It is a 1st figure which shows the recording state of the traveling pattern recording part in the 1st Embodiment of this invention. It is a 2nd figure which shows the recording state of the running pattern recording part in the 1st Embodiment of this invention. It is a figure which shows the example of the search path | route in the 1st Embodiment of this invention. It is a 1st figure which shows the example of the driving | running | working possible range displayed on the display part in the 1st Embodiment of this invention. It is a 2nd figure which shows the example of the driving | running | working possible range displayed on the display part in the 1st Embodiment of this invention. It is a 3rd figure which shows the example of the driving | running | working possible range displayed on the display part in the 1st Embodiment of this invention. It is a 4th figure which shows the example of the driving | running | working possible range displayed on the display part in the 1st Embodiment of this invention. It is a 5th figure which shows the example of the driving | running | working possible range displayed on the display part in the 1st Embodiment of this invention. It is a figure which shows the subroutine of the energy consumption calculation process per distance in the 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this case, a hybrid vehicle as an electrically driven vehicle will be described.

  FIG. 2 is a conceptual diagram of the hybrid vehicle according to the first embodiment of the present invention.

  In the figure, WL and WR are wheels functioning as drive wheels, and 11 is a drive motor (M) as a drive source connected to the wheels WL and WR and as a first electric machine. By transmitting the drive motor torque generated by driving the drive motor 11 to the wheels WL and WR, the hybrid vehicle can be run.

  When the hybrid vehicle is a front wheel drive system, the wheels WL and WR are front wheels, the rear wheels are driven wheels, and when the hybrid vehicle is a rear wheel drive system, the wheels WL and WR are rear wheels. The front wheel becomes the driven wheel. When the hybrid type vehicle is a four-wheel drive system, the drive motor 11 is connected to the front wheels and the rear wheels. In the present embodiment, the drive motor 11 is connected to the wheels WL and WR, and the wheels WL and WR are rotated by driving the drive motor 11, but each wheel of the front and rear wheels is rotated. The drive motors can be integrated with each other and the respective drive motors can be driven independently to rotate the wheels.

  Further, 13 is connected to the drive motor 11, an inverter as a drive circuit for driving or regenerating the drive motor 11, 14 as a first power source and a battery as a power storage device, 15 A generator (G) as a second electric machine and as a second electric machine and as a power generator. The drive motor 11 is driven by the electric power supplied from the battery 14 and the generator 15.

  Reference numeral 16 denotes a plug as a connecting element connected to the battery 14, 17 denotes an inverter connected to the generator 15 to drive the generator 15, and 18 drives the generator 15. Reference numeral 19 denotes an engine (E / G) as a driving source for supplying the fuel, and 19 denotes a fuel tank as a fuel supply source for supplying gasoline as fuel (driving medium) to the engine 18.

  Each of the inverters 13 and 17 includes a DC / DC converter (not shown) as a voltage converter and a plurality of transistors (not shown) as, for example, six switching elements. The DC / DC converter changes the voltage between the drive motor 11 and the generator 15 and the battery 14. Each of the transistors is paired as a unit to form a transistor module (IGBT) of each phase, and is turned on / off by a drive signal sent from a control unit (not shown), and is supplied from the battery 14 in the inverter 13. The direct current is converted into a three-phase alternating current and supplied to the drive motor 11 to drive the drive motor 11 or the three-phase alternating current generated with the regeneration of the drive motor 11 is converted into a direct current. And is supplied to the battery 14 to charge the battery 14, or the inverter 17 converts the three-phase alternating current generated with the power generation of the generator 15 into a direct current, 14 to charge the battery 14. The battery 14 can be charged by inserting the plug 16 into an outlet of a household commercial power source or an outlet of a charging device of a charging stand (charging facility).

  In the present embodiment, the DC / DC converter is built in the inverter 13, but can be arranged independently of the inverter 13.

  In the present embodiment, a lithium ion battery is used as the battery 14. In the present embodiment, battery 14 is used as the power storage device, but a capacitor can be used instead of battery 14.

  In the present embodiment, it is possible to drive the hybrid vehicle to the destination by supplying current to the drive motor 11, and the driving performance of the hybrid vehicle on flat roads, uphill roads, etc., and The battery 14 retains sufficient electric power so that the acceleration performance of the hybrid vehicle during acceleration can be sufficiently increased, the energy density of the battery 14 is 0.1 [kWh / kg] or more, and the output density is 1 [kW / kg] or more.

  Further, the weight of the battery 14 is set within an allowable range of the battery 14 based on the maximum output and the performance of the battery 14 that are required to ensure the power performance of the hybrid vehicle. The maximum output is calculated based on the vehicle weight and the running resistance (air resistance, rolling resistance, climbing resistance, acceleration resistance, etc.) applied to the hybrid type vehicle as the vehicle travels.

  For example, in the case of a hybrid vehicle having a vehicle weight of about 1000 [kg], the maximum output of the hybrid vehicle is 40 to 60 [kW], and the weight of the battery 14 is 40 to 60 [kg]. In the conventional electric vehicle, when the travelable distance is 300 to 500 [km], the energy consumed per distance when the electric vehicle is traveled is about 0.1 [kWh / km]. The weight is 300 to 500 [kg]. On the other hand, in the present embodiment, the battery 14 is charged by the generator 15 to supplement the energy required for traveling, so the weight of the battery 14 is reduced to 1/8 to 1 of that of a conventional electric vehicle. / 5.

  In the present embodiment, an internal combustion engine using gasoline as fuel is used as the engine 18, but an internal combustion engine using hydrogen or the like as fuel instead of gasoline can be used. In the present embodiment, an internal combustion engine is used to drive the generator 15, but the reciprocating piston type uses carbon dioxide gas, methane gas, or the like supplied from a high-pressure fuel tank as fuel. A carbon dioxide gas engine, a methane gas engine, or the like can be used as an expansion engine and a vaporization engine.

  Furthermore, a fuel cell is used as a power generator, and a polymer electrolyte fuel cell (PEFC), a phosphoric acid fuel cell (PAFC), a solid oxide fuel cell (SOFC), a hydrazine fuel cell, a direct fuel cell A methanol fuel cell (DMFC) or the like can be used.

  By the way, the remaining battery charge SOC [%] as the remaining battery charge is used to indicate the degree of charge (charged charge) of the battery 14. When the battery 14 is further discharged, the remaining battery capacity SOC [%] is set to X0 [%] where the remaining minimum capacity at which the battery 14 is rapidly deteriorated due to overdischarge is further charged. Then, the remaining maximum capacity at which the battery 14 is rapidly deteriorated due to overcharge is set to Xmax [%]. The remaining minimum capacity X0 [%] and the remaining maximum capacity Xmax [%] of the battery 14 are determined by the specifications of the battery 14.

  In this case, for example, when power generation by the generator 15 is started as the remaining battery capacity SOC [%] reaches the remaining minimum capacity X0 [%], the output of the generator 15 is used as a traveling load applied to the hybrid vehicle. Since it is necessary to adjust correspondingly, not only the control in the control unit becomes complicated, but also the generator 15 becomes larger and the power generation efficiency is lowered.

  Therefore, in the present embodiment, the energy consumed as the hybrid vehicle travels, that is, the consumed energy and the remaining battery SOC SOC so that the generator 15 can be driven with high power generation efficiency. %], The power generation by the generator 15 is performed.

  In this case, in order to drive the generator 15 in a state where the power generation efficiency is high, the generator 15 is set to a constant output Pg [N] so as to maintain the maximum value of the power generation efficiency or a value in the vicinity thereof, It is driven by the engine 18. Even when a carbon dioxide gas engine, a methane gas engine, or the like is used as the engine, in order to drive the generator in a state where the power generation efficiency is high, the generator has a constant value so as to maintain the maximum value or a value in the vicinity thereof. Output is set and driven by the engine.

  When a fuel cell is used as a power generation device, the fuel cell is driven in a normal driving state on the characteristic curve representing the relationship between current and voltage, that is, the current vs. voltage characteristic curve, and the current falls below a predetermined value. Or the voltage is set to a predetermined value or more. For example, at the unit electrode of the fuel cell, the current is set to 0.2 [A] or less, or the voltage is set to 0.8 [V] or more.

  And in this Embodiment, the time which drives the said generator 15 in a state with high electric power generation efficiency is made into electric power generation time.

  Next, a vehicle drive device for generating power by the generator 15 in the hybrid vehicle will be described.

  FIG. 1 is a diagram showing a vehicle drive device according to a first embodiment of the present invention.

  In the figure, 21 is a control unit as a first control unit that controls the entire hybrid vehicle, and 27 is a navigation device.

  The control unit 21 includes a CPU 31 as an arithmetic device, a RAM 32 used as a working memory when the CPU 31 performs various arithmetic processes, a ROM 33 in which various data are recorded, in addition to a control program.

  The navigation device 27 includes a navigation control unit 34 as a second control unit that performs overall control of the navigation device 27, and the navigation control unit 34 is a CPU as an arithmetic device, like the control unit 21. RAM, ROM, etc.

  In addition to the GPS sensor 35 serving as a current position detecting unit for detecting the current position of the hybrid type vehicle, the direction of the hybrid type vehicle, the time, etc., the time detecting unit, and map data, A data recording unit 36 as an information recording unit in which the above information is recorded, a communication unit 38 as a transmission / reception unit functioning as a communication terminal, and the like are connected.

  The map data includes intersection data relating to intersections (including branch points), road information (road data) indicating road conditions relating to roads connecting the intersections and road links constituting the roads, and facility data relating to various facilities. , Search data or the like processed to search for a route is included.

  The communication unit 38 receives various information such as traffic information and general information sent from a road traffic information center (not shown) such as a VICS (registered trademark) center as a first information provider. The traffic information includes traffic jam information, regulation information, parking lot information, traffic accident information, service area congestion status information, etc., and general information includes news, ambient environment information (weather In addition to forecasts, actual weather conditions such as temperature, humidity, and weather) are included. The communication unit 38 can also receive various information such as traffic information and general information from the information center as the second information provider. The navigation device 27, the road traffic information center, the information center, etc. constitute a navigation system.

  In addition to the inverters 13 and 17, the control unit 21 performs various displays on a screen (not shown), and a display unit as a first output unit for notifying the driver who is an operator. 43, a voice input unit 44a for the driver to make a predetermined input by voice, a voice output unit 44b as a second output unit for notifying the driver by outputting voice, and the driver An operation unit 45 for performing predetermined input by operation, a vehicle speed sensor 51 as a vehicle speed detection unit for detecting a vehicle speed v [km / h] of a hybrid type vehicle, a voltage of the battery 14, that is, a battery voltage Vb [V ] As a voltage detection unit for detecting the current detected by the battery voltage sensor 52, the battery 14, or supplied from the battery 14, that is, the battery current Ib [A The battery current sensor 53 as a current detection unit for detecting the battery temperature, the temperature of the battery 14, that is, the battery temperature sensor 54 as a temperature detection unit for detecting the battery temperature tb [° C.], and the gasoline supplied from the fuel tank 19 to the engine 18 The remaining amount of fuel, that is, the remaining fuel amount sensor 55 as a remaining fuel amount detecting unit for detecting the remaining fuel amount F [L] is connected. The fuel type can also be detected by the fuel remaining amount sensor 55. In addition, when the screen is formed by a touch panel, the display unit 43 also functions as an operation unit for performing a predetermined input when operated by a driver.

  A computer is configured by the control unit 21, the navigation control unit 34, the CPU 31, and the like, and a storage device or a recording medium is configured by the data recording unit 36, the RAM 32, the ROM 33, and the like. Further, an MPU or the like can be used instead of the CPU 31 as the arithmetic unit.

  The drive motor 11, battery 14, generator 15, engine 18, CPU 31, GPS sensor 35 and the like constitute a hybrid vehicle.

  Next, the basic operation of the navigation device 27 will be described.

  First, when the navigation device 27 is activated by the operation of the operation unit 45 by the driver, the navigation information acquisition processing means of the CPU (hereinafter referred to as “navigation CPU”) of the navigation control unit 34 performs the navigation information acquisition processing. The map data is acquired (read) from the data recording unit 36 or acquired (received) from an information center or the like via the communication unit 38.

  Next, the matching processing means of the navigation CPU performs matching processing, reads the current position and direction from the GPS sensor 35, reads road data from the map data, and based on the current position, direction and road data, the current position is The current position is specified by determining on which road link. The display processing means of the navigation CPU performs display processing, forms a map screen on the display unit 43, and displays the current position of the hybrid vehicle, a map around the current position, and the direction on the map screen.

  When the driver operates the operation unit 45 to input a predetermined point as a destination, the destination setting processing means of the navigation CPU performs destination setting processing and sets the destination.

  Then, when the driver operates the operation unit 45 to input a condition for searching for a route, that is, a search condition, the route search processing means of the navigation CPU performs a route search process, and the current position, purpose In addition to reading the location, search conditions, etc., the search data of the map data is read, and based on the current position, the destination, and the search data, the route from the starting point represented by the current position to the destination is determined based on the search conditions. Search and output route data representing the searched route. A route having the smallest total link cost assigned to each road link is set as a searched route.

  Subsequently, the guidance processing means of the navigation CPU performs guidance processing, reads the route data, displays the search route on the map screen according to the route data, and outputs the search route by voice as necessary. Provide route guidance.

  Next, the operation of the control unit 21 will be described.

  FIG. 3 is a main flowchart showing the operation of the controller in the first embodiment of the present invention, FIG. 4 is a diagram showing a subroutine for calculating energy consumption per distance in the first embodiment of the present invention, and FIG. The figure which shows the subroutine of the HV driving | running | working possible time calculation process in the 1st Embodiment of this invention, FIG. 6 is the figure which shows the subroutine of the EV driving | running | working possible time calculation process in the 1st Embodiment of this invention, FIG. FIG. 8 is a first diagram showing the recording state of the traveling pattern recording unit in the first embodiment of the present invention, and FIG. 8 is a second diagram showing the recording state of the traveling pattern recording unit in the first embodiment of the present invention. FIG. 9 is a diagram illustrating an example of a searched route according to the first embodiment of the present invention. FIG. 10 is a first diagram illustrating an example of a travelable range displayed on the display unit according to the first embodiment of the present invention. Fig. 11 shows The 2nd figure which shows the example of the driving | running | working possible range displayed on the display part in 1st Embodiment of invention, FIG. 12 is the driving | running | working range displayed on the display part in the 1st Embodiment of this invention. FIG. 13 is a fourth diagram illustrating an example of a travelable range displayed on the display unit according to the first embodiment of the present invention, and FIG. 14 is a diagram illustrating the first embodiment of the present invention. It is a 5th figure which shows the example of the driving | running | working possible range displayed on the display part in a form.

  First, an information acquisition processing unit (not shown) of the CPU 31 performs an information acquisition process, and acquires (reads) the current position as navigation information from the navigation device 27 (step S1).

  Subsequently, a travelable route acquisition processing unit (not shown) of the CPU 31 performs a travelable route acquisition process and allows the navigation device 27 to travel from the current position, that is, travel from the current position. An instruction is sent to search for a route, and a travelable route is acquired from the navigation device 27 (step S2).

  In the navigation device 27, when the route search processing means receives the instruction from the CPU 31, based on the road information of the map data, the hybrid vehicle is used as a starting point within a predetermined range around the current position. A route without a destination where the vehicle can travel is searched as the travelable route and transmitted to the control unit 21.

  In FIG. 9, pr is the current position, k is the travel locus, Rtj (j = 1, 2,..., N) is connected to the current position pr and searched for in the route search process, and d1 is the travelable route. A branch point where the travelable route Rt4 branches from Rt3, and d2 is a branch point where the travelable route Rt6 branches from the travelable route Rt5. In this case, the route search processing means, when viewed from the travel locus, travelable routes Rt1 to Rt4 existing ahead of the current position pr, travelable routes Rt5, Rt6, travelable route Rt3 existing behind the current position pr, The travelable routes Rt4, Rt6, etc. that branch from Rt5 are searched. In the present embodiment, the route search processing means searches for roads of a predetermined road type, for example, main roads such as national roads, prefectural roads, etc. Roads, for example, narrow streets such as city roads, are not searched. The route search processing means also searches for narrow streets such as city streets as the hybrid type vehicle approaches the end point of the travelable route Rti.

  In the present embodiment, the route search processing means also searches for the travelable routes Rt5 and Rt6 existing behind the current position pr, but the travelable route Rt1 present ahead of the current position pr. Only ~ Rt4 can be searched.

  Subsequently, the energy consumption calculation processing unit (not shown) of the CPU 31 performs the energy consumption calculation processing per distance, and the energy consumption Euj (j = 1, 2,..., N) [kWh / km] is calculated (step S3).

  Therefore, the situation information acquisition processing means of the energy consumption calculation processing means for the distance performs the situation information acquisition process, and while the hybrid type vehicle is running, the driving situation and the surrounding environment situation of the hybrid type vehicle at each control timing. Is acquired as a travel history (step S3-1).

  In the present embodiment, the travel status includes a travel distance representing the distance traveled by the hybrid vehicle, a travel time representing the time traveled by the hybrid vehicle, and the driver accelerating or decelerating the hybrid vehicle. It is a running condition index such as an acceleration / deceleration situation representing the situation. The acceleration / deceleration situation includes acceleration αm (m = 1, 2,...) At an acceleration point and deceleration βn (n = 1, 2,...) At a deceleration point. The travel distance is measured by a distance meter (not shown) connected to the control unit 21, the travel time is measured by a timer (not shown) connected to the control unit 21, and the acceleration / deceleration state is not shown connected to the control unit 21. It is detected by the accelerator sensor and the brake sensor and sent to the control unit 21.

  The ambient environment condition is an ambient environment index such as a temperature when the hybrid vehicle is traveled, a weather, a travel time indicating a time when the hybrid vehicle is traveled. Note that the temperature, weather, travel time, and the like can be acquired by reading from the navigation device 27.

  Subsequently, the travel pattern acquisition processing means of the energy consumption calculation processing means performs a travel pattern acquisition process, refers to a travel pattern recording unit (not shown) formed in the RAM 32 based on the travel history, Of the travel patterns set and recorded in the travel pattern recording unit, a travel pattern similar to the travel history is acquired as a similar travel pattern (step S3-2).

  For this purpose, the travel pattern setting processing means (not shown) of the CPU 31 performs travel pattern setting processing, and adds information to the information collected during the travel of the hybrid vehicle, that is, the collected information, as shown in FIG. Such travel patterns Pti (i = 1, 2,...) Are set in advance and recorded in the travel pattern recording unit.

  The travel pattern Pti includes information representing the travel mode of the hybrid vehicle, such as travel distance, travel time, acceleration / deceleration status, temperature, weather, travel time, and the like. Each information is indexed and travel distance The travel time, acceleration / deceleration status, and the like are classified into a travel status index, and the temperature, weather, travel time, and the like are classified into an ambient environment status index and recorded in the travel pattern recording unit.

  Further, in this embodiment, each time the hybrid type vehicle is driven along the same route, the energy consumption Eu [kWh] per distance is calculated, and the distance per distance calculated when the hybrid type vehicle is driven last time is calculated. The difference between the energy consumption and the energy consumption per distance calculated when the hybrid type vehicle is traveled this time is the energy consumption per distance Eu [kWh] calculated when the hybrid type vehicle is traveled in the next driving pattern Pti. In order to add to, it records for every index of a driving | running | working condition and surrounding environment condition as an energy addition value.

  In the travel pattern acquisition process, when there is no similar travel pattern in the travel pattern recording unit, the travel pattern acquisition processing unit acquires the similar travel pattern by creating a learning function.

  Therefore, the travel pattern acquisition processing unit refers to the travel pattern recording unit and searches for a travel pattern having pattern information similar to the travel history for each index of the travel status and the surrounding environment status in the travel pattern Pti. Then, by combining the pattern information for each index, a new travel pattern is created as a similar travel pattern Ptn. For example, as illustrated in FIG. 8, the similar travel pattern Ptn includes travel pattern information on the travel status of the travel pattern Pt1 and the surrounding environment status of the travel pattern Pt2.

  Next, the power consumption calculation processing means of the energy consumption calculation processing means performs a power consumption calculation process, and the hybrid vehicle travels along each travelable route Rtj based on the acquired similar travel pattern Ptn. The power consumption Pwj (j = 1, 2,..., N) [kW] required for the calculation is calculated (step S3-3).

Here, the travel distance Lpj (j = 1, 2,..., N) [km] and the travel time Tpj (j = 1, 2,..., N) [h] can be read from the similar travel pattern Ptn. Average vehicle speed avj (j = 1, 2,..., N) [km / h] when the hybrid vehicle travels along each travelable route Rtj,
avj = Lpj / Tpj
Can be calculated. In the present embodiment, the average vehicle speed avj [km / h] is calculated based on the travel distance Lpj [km] and the travel time Tpj [h]. However, the travel distance Lp [km] is calculated in advance. ] And travel time Tp [h], and can be recorded as an index in the travel pattern Pti. Further, based on the current driving situation, the average vehicle speed avj [km / h] can be estimated by referring to the past driving history of the hybrid type vehicle recorded in the RAM 32.

By the way, the running resistance received by the hybrid vehicle when the hybrid vehicle is driven by the HV traveling along the travelable route Rtj while generating power by the generator 15 is Rj (j = 1, 2,..., N) [N ], The power consumed by the travel resistance Rj [N] when the hybrid vehicle travels along the travelable route Rtj, that is, the travel resistance consumption power Pdj (j = 1, 2,..., N) [ kW] is
Pdj = Rj · avj
It is represented by

Further, when the hybrid vehicle travels along the travelable route Rtj, the power (electric power) consumed by the auxiliary devices such as the air conditioner, the light, and the navigation device 27, that is, the auxiliary device consumed power is expressed as Phj (j = 1, 2,..., N) [kW], and the power (electric power) regenerated by the drive motor 11 as the hybrid vehicle is braked, that is, the regenerative power is Pkj (j = 1, 2,..., N) [kW] ], The power consumption Pwj [kW] necessary for running the hybrid vehicle is
Pwj = Pdj + Phj−Pkj
= Rj · avj + Phj−Pkj
It is represented by

The travel resistance Rj [N] is defined as Ra [N], air resistance when the hybrid vehicle is driven according to the similar travel pattern Ptn, Rr [N] as rolling resistance, and Rs [N] as climbing resistance. When the acceleration resistance is Rg [N],
Rj = Ra + Rr + Rs + Rg
And is calculated based on the information of the similar travel pattern Ptn.

The air resistance Ra [N] is a resistance received from the air when the hybrid vehicle travels, and is an projection when the air density is ρ, the air resistance coefficient is Cd, and the hybrid vehicle is viewed from the front. When the area is A,
Ra = (1/2) ρ · Cd · A · (av) ²
Can be expressed as The rolling resistance Rr [N] is a resistance received from the road surface by friction between the tire and the road surface when the hybrid vehicle is driven, and the friction coefficient between the tire and the road surface is μr, and the mass of the hybrid vehicle is calculated as follows. where m is the gravitational acceleration and g is
Rr = μr · m · g
It is represented by The uphill resistance Rs [N] is a resistance generated when the hybrid vehicle travels on the uphill road, and when the slope is θk,
Rs = m · g · Σsinθk
It is represented by The acceleration resistance Rg [N] is a resistance generated when the hybrid vehicle is accelerated. When acceleration is αm,
Rg = m · g · Σαm
It is represented by

  The auxiliary machine power consumption Phj [kW] can be calculated based on the temperature, weather, travel time, etc., and the regenerative power Pkj [kW] can be calculated based on the deceleration βn.

Thus, when the power consumption Pwj [kW] necessary for traveling the hybrid vehicle along each travelable route Rtj is calculated, the power / energy conversion processing means of the energy consumption calculation processing means per distance is calculated. Performs a power / energy conversion process and uses the consumed power Pwj [kW] as energy consumed per distance Euj [kWh / km] when the hybrid vehicle travels along each travelable route Rtj.
Euj = Pwj / avj
(Step S3-4).

  Subsequently, the HV travelable time calculation processing means as the first travelable time calculation processing means (not shown) of the CPU 31 performs the HV travelable time calculation process as the first travelable time calculation process, and the generator 15 The time during which the hybrid vehicle can travel along the travelable route Rtj while performing power generation by (i.e., travelable), that is, the HV travelable time Tj (j = 1, 2, as the first travelable time) ..., n) [h] is calculated (step S4).

  For this purpose, the information acquisition processing means of the HV travelable time calculation processing means performs information acquisition processing to acquire the average vehicle speed avj [km / h] and the energy consumption Euj [kWh / km] per distance (step S4- 1) The remaining battery level SOC [%] and the remaining fuel level F [L] detected by the remaining fuel level sensor 55 are acquired (step S4-2).

  The remaining battery charge SOC [%] is detected by the battery voltage Vb [V] detected by the battery voltage sensor 52, the battery current Ib [A] detected by the battery current sensor 53, and the battery temperature sensor 54. It is calculated in advance based on the battery temperature tb [° C.]. In this case, the remaining battery level SOC [%] is a first limiting factor that limits the HV travelable time Tj [h], and the remaining fuel level F [L] limits the HV travelable time Tj [h]. This is the second limiting factor.

Subsequently, the power generation energy calculation processing means of the HV travelable time calculation processing means performs power generation energy calculation processing to obtain the output Pg [N] and the average vehicle speed avj [km / h] of the power generator 15, and the power generator The power generation energy Guj [kWh / km] per distance based on the output Pg [N] of 15 and the average vehicle speed avj [km / h]
Guj = Pg / avj
Is calculated (step S4-3).

Next, the power generation possible time calculation processing means of the HV travelable time calculation processing means performs a power generation possible time calculation process, and calculates a calorific value (thermal energy) per unit amount of gasoline when the engine 18 is driven as Hf [kWh. / L], the power generation efficiency of the generator 15 is η, and when the generator 15 is driven with a constant output Pg [N] to generate power, the remaining fuel amount F [L] is 0 (zero). The first power generation possible time Tfj (j = 1, 2,..., N) [h] limited by the remaining fuel amount F [L] until
Tfj = F · Hf · η / Pg
Is calculated (step S4-4).

Subsequently, when the power generation possible time calculation processing means drives the generator 15 with a constant output Pg [N] and runs the hybrid vehicle at an average vehicle speed avj [km / h], Second power generation possible time Tbj (j = 1, 2,..., N) [h] limited by the remaining battery SOC [%] until the remaining energy B [kWh] becomes 0 (zero)
Tbj = (B / (Euj-Guj)) / avj
Is calculated (step S4-5).

The remaining energy B [kWh] represents the energy remaining in the battery 14, and the remaining battery SOC [%], the total battery capacity Qb determined by the specifications of the battery 14, the remaining minimum capacity X0 [%], the remaining maximum Based on the capacity Xmax [%] and the correction coefficient γ accompanying the deterioration of the battery 14,
B = γ · ((SOC−X0) / (Xmax−X0)) · Qb
It is represented by

  Then, the HV travelable time determination processing means of the HV travelable time calculation processing means performs HV travelable time determination processing, and the shorter of the first and second power generation possible times Tfj, Tbj [h] The power generation possible time is determined as the HV travelable time Tj [h] (step S4-6).

  Subsequently, the EV travelable time calculation processing means as the second travelable time calculation processing means (not shown) of the CPU 31 performs the EV travelable time calculation process as the second travelable time calculation process, and the generator 15 The time during which the hybrid vehicle can travel along EV travel along the travelable route Rtj without generating electricity by EV, that is, the EV travelable time Tej (j = 1, 2,... As the second travelable time). , N) [h] is calculated (step S5).

For this purpose, the information acquisition processing means of the EV travelable time calculation processing means performs information acquisition processing and acquires the average vehicle speed avj [km / h] and the energy consumption Euj [kWh / km] per distance (step S5- 1) The EV travelable time determination processing means of the EV travelable time calculation processing means performs EV travelable time determination processing, acquires the remaining battery charge SOC [%], and EV travelable time Tej [h]
Tej = (SOC / Euj) / avj
Is determined (step S5-2).

Next, the HV travelable distance calculation processing means as the first travelable distance calculation processing means (not shown) of the CPU 31 performs the HV travelable distance calculation process as the first travelable distance calculation process, and the HV travelable time. Tj [h] is acquired, and the hybrid type vehicle can travel (runnable) in the HV travel along the travelable route Rtj for the HV travelable time Tj [h], that is, the first distance HV travelable distance Lj (j = 1, 2,..., N) [km]
Lj = Tej · avj
Is calculated (step S6).

Further, the EV travelable distance calculation processing means as the second travelable distance calculation processing means (not shown) of the CPU 31 performs the EV travelable distance calculation process as the second travelable distance calculation process, and the EV travelable time Tej [H] is obtained, and the hybrid type vehicle can be traveled by EV traveling along the travelable route Rtj for the EV travelable time Tej [h], that is, as a second travelable distance. EV travelable distance Lej (j = 1, 2,..., N) [km]
Lej = Tej · avj
Is calculated (step S7).

  Subsequently, the arrival location designation determination processing unit (not shown) of the CPU 31 performs an arrival location designation determination process to determine whether or not there is designation of a location where the hybrid vehicle arrives after finishing traveling (step S8). That is, the arrival location designation determination processing means is a location designated by the driver after the hybrid type vehicle has traveled HV travelable time Tj [h] or EV travelable time Tej [h], that is, a designated location, for example, It is determined whether it is necessary to further drive the hybrid vehicle to a nearby accommodation facility, charging station or the like.

  For this purpose, the arrival location designation determination processing means notifies the driver of designation of the location to arrive on the display unit 43.

  When the arrival location is designated, the travelable distance correction processing means (not shown) of the CPU 31 performs the travelable distance correction processing so that the HV travelable distance Lj [km] and EV can be reached so that the arrival at the designated location is possible. The travelable distance Lej [km] is corrected (step S9).

  For example, after the hybrid type vehicle travels the HV travelable distance Lj [km] or the EV travelable distance Lej [km] from the current position pr, the arrival location is designated by the driver, and the hybrid vehicle needs to travel further. In some cases, assuming that a point away from the current position pr on the travelable route Rtj by the HV travelable distance Lj [km] or the EV travelable distance Lej [km] is a travelable point, a hybrid vehicle is further designated from the travelable point. It is necessary to drive to the place.

  Therefore, the travelable distance correction processing means multiplies the HV travelable distance Lj [km] and the EV travelable distance Lej [km] by a predetermined correction coefficient corresponding to the position of the designated place, The HV travelable distance Lj [km] and EV travelable distance Lej [km] are corrected by adding the distance.

  In addition, when there is no designation of a place to arrive, the travelable distance correction processing means corrects the HV travelable distance Lj [km] and the EV travelable distance Lej [km] so that it can return to the home. (Step S10).

  In this case, the travelable distance correction processing unit multiplies the HV travelable distance Lj [km] and the EV travelable distance Lej [km] by a predetermined correction coefficient corresponding to the position of the home, The HV travelable distance Lj [km] and EV travelable distance Lej [km] are corrected by adding the distance.

  When the HV travelable distance Lj [km] and the EV travelable distance Lej [km] are corrected in this way, the travelable range display processing means (not shown) of the CPU 31 performs the travelable range display processing and displays A travelable range display screen is formed in the unit 43, and the travelable range display screen includes the current position pr, the HV travelable distance Lj [km] and the EV travelable distance Lej [km] after correction is performed. The set HV travelable range as the first travelable range and the EV travelable range as the second travelable range to be set are displayed (step S11). The HV travelable distance Lj [km] is a range in which the hybrid vehicle can travel along the travelable route Rtj while generating power by the generator 15, and the EV travelable distance Lej [km] This is a range in which the hybrid vehicle can travel along the travelable route Rtj without generating power by the generator 15.

  For this purpose, the travelable range display processing means, as shown in FIG. 10, is a point ptj (j = 1, 2,...) That is HV travelable distance Lj [km] away from the current position pr on each travelable route Rtj. ..., n) are lines having a predetermined shape, and in the present embodiment, they are connected by a straight line, and a range surrounded by the straight line is defined as an HV travelable range Ar1, and the HV travelable range Ar1 is displayed as the travelable range display screen. To display.

  Further, the travelable range display processing means, as shown in FIG. 11, is a point ptej (j = 1, 2,...) That is an EV travelable distance Lej [km] away from the current position pr on each travelable route Rtj. , N) are lines having a predetermined shape, and in the present embodiment, they are connected by a straight line, and a range surrounded by the straight line is defined as an EV travelable range Are1, and the EV travelable range Are1 is displayed on the travelable range display screen. indicate.

  As shown in FIG. 12, the travelable range display processing means can display the HV travelable range Ar1 and the EV travelable range Are1 in an overlapping manner on the travelable range display screen.

  Then, the travel continuation determination processing unit (not shown) of the CPU 31 performs a travel continuation determination process to determine whether or not to continue traveling of the hybrid type vehicle (step S12). When the hybrid vehicle continues to travel, the information acquisition processing unit acquires the current position again, and when the hybrid vehicle continues to travel, the process ends.

  By the way, when the hybrid vehicle is caused to travel along the travelable route Rtj while generating power by the generator 15, the current position pr changes, and the remaining battery charge SOC [%] and the remaining fuel charge F [L] decrease. Therefore, the HV travelable distance Lj [km] is shortened, and the travelable range Ar1 is reduced to Ar1 ′ as shown in FIG.

  For example, when the hybrid vehicle travels along the travelable route Rt4, the current position pr moves on the travelable route Rt4. As the travelable range Ar1 becomes Ar1 ′, the point pt4 does not move, whereas the points pt1 to pt3, pt5, and pt6 move on the travelable routes Rt1 to Rt3, Rt5, and Rt6, respectively. , Pt1 ′ to pt3 ′, pt5 ′, and pt6 ′.

  Further, when the hybrid vehicle is driven along the travelable route Rtj without generating power by the generator 15, the current position pr is changed and the remaining battery charge SOC [%] is reduced. Lej [km] becomes shorter, and the EV travelable range Are1 becomes smaller.

  Note that when the current position pr changes while the hybrid type vehicle travels along the travelable route Rtj and the HV travelable range Ar1 and the EV travelable range Are1 become smaller than a predetermined value, points pt1 to pt6 and pte1 to pte6 It becomes impossible to tie.

  Therefore, when the HV travelable range Ar1 and the EV travelable range Are1 become smaller than a predetermined value, the route search processing means of the navigation CPU searches not only the main road but also a narrow street as a search target, and searches for the travelable route. The possible range display processing means displays the HV travelable range Ar1 and the EV travelable range Are1 by connecting points on the travelable route including the narrow street.

  When the narrow street cannot be searched, the travelable range display processing means sets a plurality of points on the travelable route Rt4, for example, q1 and q2, as shown in FIG. A region having a predetermined shape including the points q1 and q2, for example, an elliptical shape, is defined as a travelable range Are1 ′.

  Thus, in the present embodiment, energy consumed per distance Euj [kWh / km], power generation energy Guj [kWh / km] per distance, remaining battery SOC [%] of the battery 14, and fuel of the engine 18 Based on the remaining amount F [L], the HV travelable time Tj [h] and EV travelable time Tej [h] in which the hybrid vehicle can travel are calculated, and the HV travelable time Tj [h] and EV The HV travelable distance Lj [km] and the EV travelable distance Lej [km] are calculated based on the travelable time Tej [h] and the average vehicle speed avj [km / h], and the HV travelable distance Lj [km] and Based on EV travelable distance Lej [km], HV travelable range Ar1 and EV travelable in which a hybrid vehicle can travel Since the range Aer1 is calculated and displayed on the display unit 43, when the hybrid vehicle is driven without setting the destination, the driver can easily know how far the vehicle can be driven, A hybrid vehicle can be driven with peace of mind.

  Next, a second embodiment of the present invention in which the energy consumption per distance Euj [kWh / km] can be calculated based on navigation information without using the travel pattern Pti will be described. In addition, about the thing which has the same structure as 1st Embodiment, the same code | symbol is provided and the effect of the same embodiment is used about the effect of the invention by having the same structure.

  FIG. 15 is a diagram showing a subroutine of energy consumption calculation processing per distance in the second embodiment of the present invention.

  First, the information acquisition processing means of the energy consumption calculation processing means performs information acquisition processing, and the road information (gradient, slope) recorded in the data recording unit 36 as the information recording unit from the navigation device 27 (FIG. 1). Road surface information, etc.), traffic information (congestion information, vehicle flow, vehicle speed, etc.) and surrounding environment information (temperature, weather, etc.) acquired by the communication unit 38 as a transmission / reception unit are acquired (step S3-11). In addition, when the predetermined travelable route of the travelable route Rtj is a road that is frequently used, the road information, traffic information, and the like can be recorded in the RAM 32 in advance.

  Next, the average vehicle speed calculation processing means of the energy consumption calculation processing means performs an average vehicle speed calculation process, and based on traffic information such as traffic jam information, vehicle flow, vehicle speed, etc., the hybrid type vehicle is set to the travelable route Rtj. The average vehicle speed avj [km / h] when traveling along the vehicle is calculated (step S3-12).

Subsequently, the running resistance consumption power calculation processing means of the energy consumption calculation processing means performs a running resistance consumption power calculation process, calculates a running resistance R [N] based on the navigation information, and runs the hybrid vehicle. Travel resistance consumption power Pdj [kW] consumed by the travel resistance R [N] when traveling along the possible route Rtj
Pdj = R · avj
Is calculated (step S3-13).

The travel resistance R [N] is defined as Ra [N], air resistance when the hybrid vehicle travels along the travelable route Rtj, Rr [N] as rolling resistance, and Rs [N]. And when the acceleration resistance is Rg [N],
R = Ra + Rr + Rs + Rg
It is represented by

  Next, the auxiliary machine power consumption calculation processing means of the energy consumption calculation processing means performs the auxiliary machine power consumption calculation process, and the hybrid type vehicle is set to the travelable route Rtj based on the ambient environment information such as temperature and weather. Auxiliary machine power consumption Phj [kW] consumed by the auxiliary machine when traveling along the road is calculated, and the regenerative power consumption calculation processing means of the energy consumption calculation processing means per distance performs a regenerative power consumption calculation process, a gradient, etc. Regenerative power Pkj regenerated by the drive motor 11 along with braking when the hybrid vehicle is driven along the travelable route Rtj based on traffic information such as road information, traffic jam information, vehicle flow, vehicle speed, etc. [KW] is calculated (step S3-14).

Subsequently, the energy consumption determination processing unit of the energy consumption calculation processing unit for the distance performs the energy consumption determination process for the distance, and the power consumption Pwj necessary for driving the hybrid vehicle along the travelable route Rtj [ kW]
Pwj = Pdj + Phj−Pkj
= R · avj + Phj−Pkj
Is calculated, the consumed power Pwj [kW] and the average vehicle speed avj [km / h] are obtained, and the consumed energy Euj [kWh / kW] is calculated based on the consumed power Pwj [kW] and the average vehicle speed avj [km / h]. km]
Euj = Pwj / avj
Is determined (step S3-15).

  The present invention is not limited to the above embodiments, and various modifications can be made based on the gist of the present invention, and they are not excluded from the scope of the present invention.

11 Drive motor 14 Battery 15 Generator 18 Engine 31 CPU
35 GPS sensor 43 Display unit Ar1 HV travelable range Are1 EV travelable range avj Average vehicle speed Euj Energy consumption per distance F Fuel remaining amount Lj HV travelable distance Lej EV travelable distance pr Current position Pwj Consumption power Rtj Travelable route Tj HV Travelable time Tej EV travelable time

Claims (9)

A power storage device;
A power generator,
An engine that drives the power generation device;
A drive motor connected to the power storage device and the power generation device and driven by electric power supplied from the power storage device and the power generation device;
A current position detection unit for detecting the current position;
A route search processing means for searching, as a travelable route, a route that can drive an electrically driven vehicle, based on road information, with a current position as a departure point;
Energy consumption calculation processing means for calculating the consumed power required when the electrically driven vehicle travels along the travelable route, and calculating the consumed energy consumption power per distance based on the consumed power and the average vehicle speed;
Based on the energy consumed per distance, travelable time calculation processing means for calculating a travelable time during which the electrically driven vehicle can travel along the travelable route;
A travelable distance calculation processing means for calculating a travelable distance based on the travelable time and the average vehicle speed;
Based on the travelable distance, travelable range calculation processing means for calculating a travelable range in which the electrically driven vehicle can travel along the travelable route;
An electrically driven vehicle comprising: a travelable range display processing means for displaying the travelable range on a display unit. While having power generation energy calculation processing means for calculating power generation energy per distance based on the output of the power generation device and the average vehicle speed,
2. The travelable range calculation processing unit calculates the travelable time based on energy consumed per distance, energy generated per distance, a battery remaining in a power storage device, and a remaining amount of fuel supplied to an engine. Electric drive vehicle. The travelable time calculation processing means calculates a first travelable time during which the electrically driven vehicle can travel along the travelable route while generating power by the power generation device,
The travelable distance calculation processing means calculates a first travelable distance that allows the electrically driven vehicle to travel along the travelable route while generating power by the power generation device,
3. The electric drive according to claim 1, wherein the travelable range calculation processing unit calculates a first travelable range in which the electrically driven vehicle can travel along the travelable route while generating power by the power generation device. vehicle.   The first travelable time is a first power generation possible time limited by the remaining amount of fuel supplied to the engine and a second power generation possible time limited by the remaining battery amount of the power storage device The electrically driven vehicle according to claim 3, which has a shorter power generation possible time.   The electrically driven vehicle according to claim 4, wherein the first power generation possible time is a time limited by a remaining amount of fuel supplied to the engine when the power generation device is driven at a constant output.   The electrically driven vehicle according to claim 1, wherein the travelable time calculation processing unit calculates the travelable time based on energy consumed per distance, a remaining battery level of the power storage device, and an average vehicle speed. The travelable time calculation processing means calculates a second travelable time during which the electrically driven vehicle can travel along the travelable route without generating power by the power generation device,
The travelable distance calculation processing means calculates a second travelable distance that allows the electrically driven vehicle to travel along the travelable route without generating power by the power generation device,
2. The electrically driven vehicle according to claim 1, wherein the travelable range calculation processing unit calculates a second travelable range in which the electrically driven vehicle can travel along the travelable route without generating power by the power generation device. .   The electrically driven vehicle according to any one of claims 1 to 7, wherein the consumed power includes power consumed by running resistance, power consumed by an auxiliary machine, and power regenerated by a drive motor.   9. A travelable distance correction processing unit that corrects the travelable distance depending on whether the electric drive vehicle needs to travel further to a specified place after traveling the travelable distance or returns to the home. The electrically driven vehicle according to any one of the above.

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