CN1311999C - Parallel connection mixed power driving system and its driving method - Google Patents

Abstract

The invention provides a parallel hybrid driving system and its driving method. In the driving system, the engine and the motor are connected through a gear and a one-way overrunning clutch, wherein the outer ring of the one-way overrunning clutch is connected with the output end of the engine, and the one-way overrunning clutch The inner ring of the motor is connected to the output end of the motor. When the torque of the outer ring is greater than the torque of the inner ring, the one-way overrunning clutch is in the engaged state and transmits the torque; when the torque of the outer ring is smaller than the torque of the inner ring, the one-way overrunning clutch is in a slipping state . The driving method includes a motor driving mode, an engine driving mode, a hybrid driving mode, a driving charging mode, a regenerative braking energy feedback mode, and a parking charging mode. The drive scheme maintains the mechanical connection between the engine and the drive system, and the power performance of the vehicle can be easily guaranteed, and the operating point of the engine can be optimized to make the engine run stably in the speed range of low fuel consumption, high efficiency and low pollution .

Description

Parallel hybrid drive system and drive method thereof

technical field

The invention relates to an automobile hybrid driving system and a driving method thereof.

Background technique

At present, the driving scheme of hybrid electric vehicles is mainly that the engine and the power drive battery jointly drive the whole vehicle. Engines include gasoline engines, diesel engines, natural gas, liquefied petroleum gas, methanol, ethanol and other fuel engines; motors include A/C AC motors, switched reluctance motors, DC permanent magnets and other motors; clutches include dry, wet, electronically controlled clutches, etc. ;Couplers include gears, chains, belts, etc.; Electronically controlled transmissions include AMT, AT, CVT, etc. In the existing hybrid drive scheme, the coupling device and the engine are always connected through the clutch during the running of the vehicle. When the engine stops working, the coupling device will drive the engine shaft to rotate, resulting in an "upside down"; the existing hybrid electric vehicle Drive scheme When the engine works alone, the power is driven by the engine through the coupler to drive the air conditioner, steering, brake and other accessories to work; when the engine and the motor work together, the power drives the air conditioner, steering, brake and other accessories to work through the coupler; but in pure Under the electric working condition, because the engine does not work, the traditional air conditioner, steering, brake and other devices cannot work due to no power input, so an additional electric system must be added to drive the air conditioner, steering, brake and other accessories to work normally Work.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the existing hybrid drive scheme, and provide a parallel hybrid electric vehicle drive system and its drive method, so that the air conditioner, steering, brake and other accessories of the hybrid electric vehicle can It can still work normally without adding an electric system, and at the same time, the super capacitor is used to improve the starting power and braking energy recovery efficiency, thereby improving the vehicle's power performance and reducing fuel consumption.

In order to achieve the above object, the parallel hybrid drive system of the present invention adopts the following technical solutions:

A parallel hybrid drive system, including wheels, final drive, mechanical automatic transmission, rear clutch, coupler, one-way overrunning clutch, engine, air-conditioning compressor, power steering device, transmission hydraulic pump, electric motor, inverter device, electric vacuum pump, battery, DC-DC converter, battery manager, rechargeable battery, AC-DC converter, supercapacitor manager, supercapacitor, wherein the wheels are connected to the main reducer, and the rear clutch is mechanically automatically The transmission is connected with the main reducer, wherein the output end of the engine is connected with the outer ring of the one-way overrunning clutch, and the inner ring of the one-way overrunning clutch is connected with the electric motor, the air-conditioning compressor, the power steering device and the transmission hydraulic pump through a coupler, The supercapacitor is connected to the motor through a supercapacitor manager and an AC-DC converter, the rechargeable battery is connected to the motor through a battery manager and an inverter, and the electric vacuum pump is connected to the rechargeable battery through a battery and a DC-DC converter.

The parallel hybrid drive method is to adopt the above-mentioned parallel hybrid drive system, and the drive method includes motor drive mode, engine drive mode, hybrid drive mode, driving charging mode, regenerative braking energy feedback mode, parking charging mode , wherein the engine driving mode is the main driving mode of the vehicle, the motor driving mode is the auxiliary driving mode, and the auxiliary power source is a rechargeable battery and a supercapacitor.

(1) Motor drive mode

During the start-up phase or when the engine is under low load conditions, the thermal efficiency of the engine is low and the exhaust emission is not good. Therefore, when the vehicle starts, the engine does not work, the one-way overrunning clutch slips, does not transmit the torque, avoids dragging the engine backwards, and the rear clutch engages. Power flow path: supercapacitor rechargeable battery→inverter→electric motor→coupler→rear clutch→mechanical automatic transmission→final reducer→wheels. The other part of the power is transmitted to the air conditioner compressor, power steering device, transmission hydraulic pump and other auxiliary components through the coupler to ensure the normal operation of these components after the vehicle is started. When the power of the supercapacitor is insufficient, the rechargeable battery provides power to maintain the operation of the motor, and the rechargeable battery also provides power to auxiliary electrical equipment such as electric vacuum pumps through the inverter. The supercapacitor can provide a large current to the motor in a short time, so that the motor can generate a large starting torque, which greatly reduces the load on the rechargeable battery and prolongs the life of the rechargeable battery. When the vehicle starts, the electric motor generates high torque, which improves the starting performance of the vehicle.

(2) Engine driving mode

When the driving torque of the vehicle reaches the set value, the vehicle enters the engine driving mode under the control of the vehicle controller. After the engine starts, when the torque of the one-way overrunning clutch at the engine end is greater than the torque at the coupler end, the one-way overrunning clutch is engaged, the rear clutch is also engaged, and the motor stops working. The path of power flow: engine→one-way overrunning clutch→coupler→rear clutch→mechanical automatic transmission→final drive→wheels. After the power from the engine is transmitted to the coupler, the other part is transmitted to the air-conditioning compressor, power steering device, transmission hydraulic pump and other auxiliary components, so that these components can also work normally after the power drive mode is changed. In this working mode, due to the adoption of the vehicle control system and mechanical automatic transmission, the engine works in the medium-load high-efficiency zone, which can obtain high fuel economy, low emission and stable driving performance. Using the engine to drive the vehicle alone, as the main driving mode of the vehicle, can avoid the rapid loss of the rechargeable battery when the motor drives the vehicle at high speed, and improve the mileage of the vehicle. At this time, the rechargeable battery also provides electrical energy for auxiliary electrical equipment such as electric vacuum pumps. When the power of the rechargeable battery and supercapacitor is too low or the electric motor cannot complete driving the vehicle, the engine will start and drive the vehicle alone.

(3) Hybrid drive mode

When the vehicle needs a large driving torque such as rapid acceleration or climbing, the engine and the electric motor jointly drive the vehicle to meet the power requirements of the vehicle. At this time, both the one-way overrunning clutch and the rear clutch are closed, and the power from the engine and the motor is combined in the power coupler, part of which is transmitted to the wheels through the rear clutch and mechanical automatic transmission to drive the vehicle, and the other part of the power is transmitted to the air conditioner compressor , power steering device, transmission hydraulic pump and other auxiliary components to ensure the normal operation of these components. The supercapacitor can provide a large current to the motor in a short time, so that the motor can generate a large torque, so the electric energy required for driving the motor is first taken from the supercapacitor. In the hybrid drive mode, the rechargeable battery supplies power to auxiliary electrical equipment such as electric vacuum pumps.

(4) Driving charging mode

During the driving phase of the vehicle, when the power of the rechargeable battery and the supercapacitor is too low, the vehicle controller controls the engine to work under high load conditions, and the motor becomes a generator. The path of power flow: engine→one-way overrunning clutch→coupler→rear clutch→mechanical automatic transmission→final reducer→wheel; part of the power is transmitted to air-conditioning compressor, power steering device and transmission hydraulic pump after passing through the coupler and other auxiliary parts to ensure that each auxiliary part completes the work requirements; the other part drives the generator to charge the rechargeable battery and super capacitor. During the driving charging process, the electric energy generated by the generator is also used for the work of electric vacuum pump and other auxiliary electrical equipment. When the power of the rechargeable battery and the supercapacitor reaches the set value, the driving charging mode ends.

(5) Regenerative braking energy feedback mode

When the vehicle brakes or decelerates, the vehicle controller controls the braking energy feedback. The torque of the one-way overrunning clutch at the engine end is smaller than the torque at the coupler end, the one-way overrunning clutch slips, the rear clutch is closed, the engine stops outputting power, and the motor works as a generator to convert the braking energy into electrical energy and store it in the super capacitor and Among the power batteries, the feedback of braking energy is realized. Since the voltage level of the supercapacitor is lower than that of the rechargeable battery, when charging, the supercapacitor is charged first, and then the rechargeable battery is charged. In this working mode, part of the power is transmitted from the coupler to auxiliary components such as the air conditioning compressor, power steering, transmission hydraulic pump, etc. Part of the electrical energy generated by the generator is transmitted to the electric vacuum pump and other auxiliary electrical equipment through the inverter.

(6) Parking charging mode

When the vehicle is parked, if the power of the rechargeable battery and supercapacitor is too low, the parking charging mode can be used. At this time, the one-way overrunning clutch is closed, the rear clutch is disconnected, and the path of power flow is: engine→one-way overrunning clutch→coupler → Generator → super capacitor power battery; at the same time, another part of the power is transmitted to the air conditioner compressor, power steering device, AMT hydraulic pump and other auxiliary components through the coupler. When the power of the rechargeable battery and the supercapacitor reaches the requirement, the parking charging mode ends. In this mode, the rechargeable battery provides power to auxiliary electrical equipment such as electric vacuum pumps.

Since the supercapacitor has the characteristic of fast charging in a very short time, as an improvement of the above technical solution, the voltage level of the supercapacitor 15 is lower than that of the rechargeable battery 12 . Therefore, charge the supercapacitor first in the charging process.

Compared with existing ones, the parallel hybrid drive system of the present invention has the following remarkable effects:

The drive scheme maintains the mechanical connection between the engine and the drive system, and the power performance of the vehicle can be easily guaranteed, and the operating point of the engine can be optimized to make the engine run stably in the speed range of low fuel consumption, high efficiency and low pollution . The engine and the motor are connected through a gear and a one-way overrunning clutch, in which the outer ring of the one-way overrunning clutch is connected with the output end of the engine, and the inner ring of the one-way overrunning clutch is connected with the output end of the motor. When the torque of the outer ring is greater than that of the inner ring , the one-way overrunning clutch is in the engaged state and transmits torque; when the torque of the outer ring is smaller than the torque of the inner ring, the one-way overrunning clutch is in a slipping state and cannot transmit torque, thereby reducing unnecessary energy loss and avoiding The phenomenon of dragging the engine backwards, and this way of reducing consumption does not require additional electronic control devices, and the scheme structure is simple.

The electric drive system is composed of supercapacitors and power batteries. Due to the characteristics of supercapacitors that can receive or discharge large currents in a short period of time, when the vehicle starts, accelerates, and climbs, etc., the working conditions that require high torque are first provided by the supercapacitors. The power is finally powered by the power battery, which effectively provides the power required for starting; at the same time, as much energy as possible is recovered during braking, and the feedback electric energy first returns to the super capacitor, and then gradually charges the power battery. Moreover, in the driving scheme of the present invention, the operating voltage ranges of the supercapacitor and the power battery are different, so there will be no backflow of electric energy in the supercapacitor to the power battery.

The power coupling device of this drive scheme can still drive the air conditioner, steering, brake and other accessories to work through the motor under the parking condition, and can use the existing structure on the vehicle without adding an additional power device, reducing manufacturing costs.

Description of drawings

Fig. 1 is a schematic diagram of the positional relationship of each component in the parallel hybrid drive scheme of the present invention.

Detailed ways

As shown in Figure 1, a parallel hybrid drive system includes wheels 20, final drive 1, mechanical automatic transmission 2, rear clutch 3, coupler 4, one-way overrunning clutch 5, engine 16, air conditioner compressor 17. Power steering device 18, transmission hydraulic pump 19, wherein the wheels 20 are connected to the main reducer 1, and the rear clutch 3 is connected to the final reducer 1 through the mechanical automatic transmission 2, which is characterized in that it also includes an electric motor 6 , inverter 7, electric vacuum pump 8, battery 9, DC-DC converter 10, battery manager 11, rechargeable battery 12, AC-DC converter 13, supercapacitor manager 14, supercapacitor 15, wherein the engine 16 The output end is connected with the outer ring of the one-way overrunning clutch 5, and the inner ring of the one-way overrunning clutch 5 is connected with the electric motor 6, the air conditioner compressor 17, the power steering device 18 and the transmission hydraulic pump 19 through the coupler 4. The capacitor 15 is connected to the motor 6 through the supercapacitor manager 14 and the AC-DC converter 13, the rechargeable battery is connected to the motor 6 through the battery manager 11 and the inverter 7, and the electric vacuum pump 8 is converted through the battery 9 and DC-DC The device 10 is connected to the rechargeable battery, the voltage level of the supercapacitor is 266V less than the voltage level of the rechargeable battery 336V, and the rechargeable battery 12 is Ni-MH battery.

Among them, the main reducer 1 is the main component for reducing the speed and increasing the torque in the automobile transmission system;

The mechanical automatic transmission 2 transmits the power output by the engine to the transmission device;

The rear clutch 3 ensures the smooth start of the car, which is convenient for gear shifting and prevents the drive train from being overloaded;

The coupler 4 couples and superimposes various powers;

The one-way overrunning clutch 5 transmits the power of the engine and performs automatic clutch switching at the same time;

Motor 6. Provide the starting power of the car and part of the power during driving;

Inverter 7 converts direct current into a kind of power converter of alternating current;

The electric vacuum pump 8 increases the vacuum degree of the vehicle's vacuum booster when the vehicle is running at high idling speed after the cold car is started, improves the ability of vacuum boosting, and ensures driving safety when the car is cold;

24V battery 9 traditional low-voltage circuit power source;

The DC-DC converter 10 is used for DC conversion;

The battery manager 11 manages the battery system;

The rechargeable battery 12 provides the power required for driving the car, and stores the excess power at the same time;

The AC-DC converter 13 is used for AC-DC conversion;

The supercapacitor manager 14 manages the supercapacitor system;

The supercapacitor 15 provides the power required for the car to start, and stores the excess power at the same time;

The engine 16 provides the power required for the normal running of the automobile;

The air conditioner compressor 17 transports and compresses the refrigerant vapor to ensure the normal operation of the refrigeration cycle;

The power steering device 18 provides power for steering;

The transmission hydraulic pump 19 provides hydraulic pressure for the transmission actuators.

A parallel hybrid drive method, using the above parallel hybrid drive system, the drive method includes motor drive mode, engine drive mode, hybrid drive mode, driving charging mode, regenerative braking energy feedback mode, parking charging mode, in,

Motor drive mode

When the vehicle starts or the engine is under low-load conditions, the motor 6 works alone, the one-way overrunning clutch 5 slips, does not transmit torque, avoids dragging the engine 16 backwards, and the rear clutch 3 is engaged; part of the power is transferred from the super through the following ways Capacitor and rechargeable battery 12 are delivered to wheel 20: supercapacitor 15 and rechargeable battery 12→inverter 7→motor 6→coupler 4→rear clutch 3→mechanical automatic transmission AMT2→final drive 1→wheel 20; at the same time, Another part of the power is transmitted from the supercapacitor 15 and the rechargeable battery 12 to the air conditioner compressor 17, the power steering device 18, and the transmission hydraulic pump 19 through the following channels: supercapacitor 15 and rechargeable battery 12→inverter 7→motor 6→coupler 4 →Air conditioner compressor 17, power steering device 18, transmission hydraulic pump 19, to ensure the normal work of air conditioner compressor 17, power steering device 18, transmission hydraulic pump 19 after the vehicle is started. When the power of the supercapacitor is insufficient, the rechargeable battery 12 provides electric energy to maintain the operation of the motor, and at the same time, the rechargeable battery 12 provides electric energy to auxiliary electrical equipment such as the electric vacuum pump 8 through the DC-DC converter 10 and the 24V battery. The supercapacitor 15 can provide a large current to the motor 6 in a short time, so that the motor 6 generates a large starting torque, which greatly reduces the load on the rechargeable battery 12 and prolongs the life of the rechargeable battery 12 . When the vehicle starts, the high torque generated by the electric motor 6 improves the starting performance of the vehicle.

engine drive mode

When the driving torque reaches the set value after the vehicle is started, it is controlled by the vehicle controller, and the engine 16 works alone. , the one-way overrunning clutch 5 is engaged, the rear clutch 3 is also engaged, and the motor 6 stops working; a part of the power drives the wheels 20 through the following ways: engine 16→one-way overrunning clutch 5→coupler 4→rear clutch 3→mechanical automatic transmission AMT2 → final drive 1 → wheel 20; at the same time, another part of power is transmitted from engine 16 to air-conditioning compressor 17, power steering 18, transmission hydraulic pump 19 through coupler 4, so that air-conditioning compressor 17, power steering 18, transmission The hydraulic pump 19 can still work normally after the power driving mode changes. At this moment, the rechargeable battery also provides electrical energy for the electric vacuum pump 8 and other auxiliary electrical equipment. When the power of the rechargeable battery 12 and the supercapacitor 15 is too low or the electric motor cannot finish driving the vehicle, the engine is also used to independently start and drive the vehicle. In this working mode, due to the adoption of the vehicle control system and the mechanical automatic transmission 2, the engine 16 works in a medium-load high-efficiency zone, which can obtain higher fuel economy, lower emissions and smooth driving performance. Using the engine 16 to drive the vehicle alone, as the main driving mode of the vehicle, can avoid the rapid loss of the rechargeable battery 12 when the motor 6 drives the vehicle at high speed, and improves the mileage of the vehicle.

hybrid drive mode

When the vehicle needs a large driving torque such as rapid acceleration or climbing, in order to meet the power requirements of the vehicle, when the engine 16 and the motor 6 jointly drive the vehicle, the one-way overrunning clutch 5 and the rear clutch 3 are all closed, and the engine 16 and the motor 6 send The power is combined in the coupler 4, a part of the power is transmitted to the wheels 20 through the rear clutch 3 and the mechanical automatic transmission 2 to drive the vehicle, and the other part of the power is transmitted to the air conditioner compressor 17, the power steering device 18, and the transmission through the coupler 4. The hydraulic pump 19 ensures that the air conditioner compressor 17, the power steering device 18, and the transmission hydraulic pump 19 work normally. The supercapacitor 15 can provide a large current to the motor 6 in a short time, so that the motor 6 can generate a large torque, so the electric energy required for driving the motor 6 is firstly taken from the supercapacitor 15 . In the hybrid driving mode, the rechargeable battery 12 provides electric energy to the electric vacuum pump 8 and other auxiliary electrical equipment through the DC-DC converter 10 and the 24V battery.

Driving charging mode

During the running of the vehicle, when the electric quantity of the rechargeable battery 12 and the supercapacitor 15 is too low, the engine 16 is controlled by the vehicle controller, and the engine 16 works under a high-load condition, and the electric motor 6 plays a role of generating electricity. Part of the power drives the wheels through the following ways: engine→one-way overrunning clutch→coupler→rear clutch→mechanical automatic transmission AMT→final drive→wheel; part of the power is transmitted from the engine to the air conditioner compressor through the coupler 17, power steering device 18 and the transmission hydraulic pump ensure that the air conditioner compressor 17, the power steering device 18 and the transmission hydraulic pump 19 complete the work requirements; another part of the power drives the motor 6 to work through the coupler 4 to charge the rechargeable battery 12 and the supercapacitor 15. Since the supercapacitor has the characteristic of fast charging in a very short time, and the voltage level of the supercapacitor is set at 266V less than the voltage level of the power battery at 336V, so the supercapacitor is charged first during the charging process. During the driving charging process, the electric energy generated by the motor 6 drives the electric vacuum pump 8 and other auxiliary electrical equipment through the following channels: motor 6→inverter 7→battery manager 11→rechargeable battery 12→DC-DC converter 10→24V Battery → electric vacuum pump 8. When the electric quantity of the rechargeable battery 12 and the supercapacitor 15 reaches the set value, the driving charging mode ends. In this working mode, the rechargeable battery 12 provides electric energy to the electric vacuum pump 8 and other auxiliary electrical equipment through the DC-DC converter 10 and the 24V battery.

Regenerative braking energy feedback mode

When the vehicle brakes or decelerates, the vehicle controller controls the drive system to perform braking energy feedback: the torque of the one-way overrunning clutch 5 at the end of the engine 16 is smaller than the torque of the one-way overrunning clutch 5 at the end of the coupler 4, and the one-way The overrunning clutch 5 slips, the rear clutch 3 closes, the engine 16 stops outputting power, and the motor 6 works in the form of a generator 16 to convert the braking energy into electric energy, which is stored in the supercapacitor 15 and the rechargeable battery 12 to realize the braking energy give back. In this working mode, the rechargeable battery 12 provides electric energy to the electric vacuum pump 8 and other auxiliary electrical equipment through the DC-DC converter 10 and the 24V battery.

Parking charging mode

After the vehicle stops running, if the electric quantity of the rechargeable battery 12 and the supercapacitor 15 is too low, the parking charging mode can be carried out. At this time, the one-way overrunning clutch 5 is closed, and the rear clutch 3 is disconnected to charge the supercapacitor 15 and the rechargeable battery 12. At the same time, a part of the power is transmitted to the air conditioner compressor 17, the power steering device 18, and the transmission hydraulic pump through the coupler 4. In this working mode, the rechargeable battery 12 provides electric energy to the electric vacuum pump 8 and other auxiliary electrical equipment through the DC-DC converter 10 and the 24V battery.

Since the voltage level of the supercapacitor 15 is lower than that of the rechargeable battery 12, when charging, the supercapacitor 15 is charged first, and then the rechargeable battery 12 is charged.

Claims (3)

1, a kind of parallel connection mixed power driving system, comprise wheel (20), main reduction gear (1), automatic machincal transmission (2), back power-transfer clutch (3), coupler (4), mono-directional overrun clutch (5), driving engine (16), air-conditioning compressor (17), power steering gear (18), transmission fluid press pump (19), wherein said wheel (20) links to each other with main reduction gear (1), described back power-transfer clutch (3) links to each other with main reduction gear (1) by automatic machincal transmission (2), it is characterized in that: also comprise electrical motor (6), inverter (7), electric vacuum pump (8), battery (9), dc dc converter (10), battery manager (11), rechargeable battery (12), AC-DC converter (13), super capacitance management device (14), super capacitor (15), the mouth of wherein said driving engine (16) links to each other with the outer ring of mono-directional overrun clutch (5), the inner ring of described mono-directional overrun clutch (5) is by coupler (4) and electrical motor (6), air-conditioning compressor (17), power steering gear (18) links to each other with transmission fluid press pump (19), described super capacitor (15) links to each other with electrical motor (6) with AC-DC converter (13) by super capacitance management device (14), described rechargeable battery links to each other with electrical motor (6) with inverter (7) by battery manager (11), and described electric vacuum pump (8) links to each other with rechargeable battery with dc dc converter (10) by battery (9).

2, parallel connection mixed power driving system according to claim 1 is characterized in that: the voltage class of described super capacitor (15) is less than the voltage class of rechargeable battery (12).

3, a kind of parallel type hybrid dynamic driving method, it is characterized in that: adopt the described parallel connection mixed power driving system of claim 1, described driving method comprises motor drive mode, the engine drive pattern, combination drive pattern, driving charge mode, the regenerative braking energy feedback pattern, the stopping for charging pattern, wherein

Described motor drive mode is,

When vehicle start stage or electrical motor were in running on the lower load, electrical motor (6) worked independently, and mono-directional overrun clutch (5) skids, transfer torque not, and back power-transfer clutch (3) engages; Part power passes to wheel (20) from super capacitor (15) and rechargeable battery (12), simultaneously, another part power passes to air-conditioning compressor (17), power steering gear (18), transmission fluid press pump (19) from super capacitor (15) and rechargeable battery (12), when the super capacitor electric energy is not enough, provide electric energy to keep the work of electrical motor by rechargeable battery (12), simultaneously, rechargeable battery (12) provides electric energy by dc dc converter (10), battery to electric vacuum pump (8) equipment;

Described engine drive pattern is,

When vehicle launch rear drive moment of torsion reaches in the setting value, the moment of torsion that mono-directional overrun clutch (5) is positioned at driving engine (16) one ends is positioned at the moment of torsion of coupler (4) one ends greater than mono-directional overrun clutch (5), mono-directional overrun clutch (5) engages, back power-transfer clutch (3) also engages, and electrical motor (6) quits work; Driving engine (16) works independently, a part of power driven wheel (20), and simultaneously, another part power passes to air-conditioning compressor (17), power steering gear (18), transmission fluid press pump (19) by coupler (4) from driving engine (16); At this moment, rechargeable battery (12) also provides electric energy for electric vacuum pump (8), crosses low or electrical motor (6) can not finish powered vehicle the time when the electric weight of rechargeable battery (12) and super capacitor (15), is started separately and powered vehicle by driving engine (16);

Described combination drive pattern is,

When vehicle needs big driving torque, the common powered vehicle of driving engine (16) and electrical motor (6), mono-directional overrun clutch (5) is all closed with back power-transfer clutch (3), driving engine (16) makes up in coupler (4) with the power that electrical motor (6) sends, part power warp is power-transfer clutch (3) later, automatic machincal transmission (2) is passed to wheel (20) with powered vehicle, another part power passes to air-conditioning compressor (17) by coupler (4), power steering gear (18), transmission fluid press pump (19), rechargeable battery this moment (12) is by dc dc converter (10), battery provides electric energy to electric vacuum pump (8);

Described driving charge mode is,

In the vehicle ' process, when the electric weight of rechargeable battery (12) and super capacitor (15) is crossed when low, driving engine (16) is worked under the high load capacity operating mode, generate electricity by electrical motor (6), part power driven wheel, another part power is passed to air-conditioning compressor (17) from driving engine through coupler, power steering gear (18) and transmission fluid press pump (19), another part power drives electrical motor (6) work by coupler (4), to rechargeable battery (12) and super capacitor (15) charging, the electric energy that electrical motor (6) sends drives electric vacuum pump (8) equipment work, when the electric weight of rechargeable battery (12) and super capacitor (15) reached setting value, the driving charge mode finished;

Described regenerative braking energy feedback pattern is,

When car brakeing or Reduced Speed Now, the moment of torsion that mono-directional overrun clutch (5) is positioned at driving engine (16) one ends is positioned at the moment of torsion of coupler (4) one ends less than mono-directional overrun clutch (5), mono-directional overrun clutch (5) skids, back power-transfer clutch (3) closure, driving engine (16) stops outputting power, and electrical motor (6) is converted into electric energy with the form work of electrical generator (16) with braking energy, be stored in the middle of super capacitor (15) and the rechargeable battery (12), realize the feedback of braking energy;

Described stopping for charging pattern is,

After vehicle stops to travel, if rechargeable battery (12) is low excessively with the electric weight of super capacitor (15), can carry out the stopping for charging pattern, this moment mono-directional overrun clutch (5) closure, back power-transfer clutch (3) disconnects, super capacitor (15) and rechargeable battery (12) are charged, and a part of power passes to air-conditioning compressor (17), power steering gear (18), transmission fluid press pump (19) by coupler (4) simultaneously.