CN101746409A

CN101746409A - Drive assist system for power steering wheel

Info

Publication number: CN101746409A
Application number: CN200810179398A
Authority: CN
Inventors: 杜侑达
Original assignee: Sunyen Co Ltd
Current assignee: Sunyen Co Ltd
Priority date: 2008-12-10
Filing date: 2008-12-10
Publication date: 2010-06-23

Abstract

The invention discloses a driving auxiliary system of a power steering wheel, which provides a driver with a plurality of different steering wheel power auxiliary settings, so that the steering wheel can adjust the switching time of power auxiliary according to different vehicle conditions, road conditions and physiological conditions of the driver; the setting contents can be set by the manufacturer, the dealer, the service and assembly technician of the system, or even by the driver himself/herself; the set standard can be determined according to the electric quantity of the battery, the vehicle speed or other vehicle states; the power steering wheel has the beneficial effects that a more diversified power auxiliary mode and a more elastic power auxiliary time are provided for the vehicle, so that the consumption of fuel oil or battery power is saved, the power steering wheel can be suitable for the driving habit and physiological conditions of a driver, and the driving stability and safety of the vehicle are further kept.

Description

The driving ancillary system of power steering

Technical field

The invention relates to a kind of power steering, especially a kind of driving ancillary system of intelligent power steering, for providing multiple different bearing circle power-assisted, the driver sets, make bearing circle adjust the switch opportunity of power-assisted according to different vehicle condition, road conditions and driver's physiological condition.

Background technology

General common fluid pressure type power steering, as shown in Figure 1, be that power steering 90 is turned to required hydraulic oil, directly driving oil feed pump 92 by engine 93 throws power steering oil in the steering hardware 91 into, therefore after car starts, the additional function of this power steering 90 can full-time running, advances with drive wheels 94; Its shortcoming is as follows:

When car during in high speed, bearing circle kicks the beam and causes danger easily, if external force is run into bearing circle or wheel runs into hole, hole and the easier deflection of thrust.

When engine is ineffective, the power-assisted of power steering does not just have effect, if this moment is the fault of engine own, car needs towing or free-hand go-cart, perhaps need the detection side when cross-examining topic, turn to just quite effort, in addition, do not having under the situation of fuel feeding if steering wheel rotation causes the damage of steering hardware easily actually.The fuel oil engine drives pump can consume more fuel oil, in the surging epoch of oil price, is another shortcoming.

In addition, if some cars want to repack into battery-driven car, under existing hydrostatic steering system, desire to repack into dynamic auxiliary bearing circle and have any problem, the present invention can provide some directions and method, makes that needn't change the interior most system of engine chamber just can reequip.

Summary of the invention

In view of this, the technical matters that mainly solves of the present invention is to provide a kind of driving ancillary system of power steering, utilize the shifter in pump power source, can select the imput power source of oil feed pump, when rotating, the input end of oil feed pump can be switched to the vehicular drive source to be connected with it in the vehicular drive source; Stop operating in the vehicular drive source or rev down to the required rotating speed of oil feed pump when following, perhaps have other consider as: when the torsion of avoiding serving as the engine in vehicular drive source or electrical motor expends, saves the battery power consumption that electronic car owner powers etc., just oil feed pump can be switched to the mode that pump motor drives, be the technical matters that mainly solves of the present invention.

For reaching above-mentioned technical matters, technical scheme of the present invention is achieved in that a kind of driving ancillary system of power steering, is used for drive wheels, and wherein this wheel is adjusted the direction of wheel via steering hardware by a bearing circle; One oil feed pump is used to provide hydraulic oil to give steering hardware, and this oil feed pump is driven by the drive source of former vehicle under normal the use; This drives ancillary system, comprises following assembly: a pump motor is used to drive oil feed pump; The shifter in one pump power source, the shifter in this pump power source is connected between pump motor and the vehicular drive source, the imput power source that is used for selecting oil feed pump for both one of, wherein be connected with transmission component between the shifter in this pump power source and the oil feed pump; One switches control unit, is used to control the shifter connection in this pump power source, makes its decision connect pump motor or vehicular drive source; This switching is used to receive the assembly of sensing signal, processing signals or issue an order with control unit; One main control unit is used for exerting oneself of control pump electrical motor; This main control unit is assembly or the device that a kind of control signal transmits; One battery provides electric power in pump motor, with the driving pump motor operation; One actuating device, this actuating device receives from the signal of this main control unit and the voltage or the electric current of battery supply, so the output of control pump electrical motor; Wherein the shifter in this pump power source when rotating in the vehicular drive source, can switch to the input end of oil feed pump the vehicular drive source to be connected with it; Stop operating in the vehicular drive source or rev down when following, just can switch to pump motor with the input end of oil feed pump to the required rotating speed of oil feed pump, be responsible for driving oil feed pump by pump motor; And this pump power source electrical motor can be carried out automatic guidance or be carried out manually operated control by the driver by switch control unit; When switching, switch control unit just can feed signals give main control unit to carry out the control of pump motor; This main control unit is delivered to this actuating device with instruction, and allowing battery supply pass through just can the primer pump electrical motor, so that the pump running.

The technique effect that the present invention reaches is as follows: the beneficial effect that the present invention produced comprises:

1, a kind of driving ancillary system of intelligent power steering effective, full of elasticity is provided for the vehicle of any propulsion source, improve the stability and the safety of vehicle ' widely, and can provide different auxiliary setting for different vehicle conditions, road conditions, driver.

2, be applicable to present fuel oil engine car type, even the car type of native system is not installed when dispatching from the factory, it is also quite easy to append repacking after dispatching from the factory again.Especially second embodiment in the embodiment, do not relate to the vehicular drive source between switching be connected, repacking is easily.

3, oily electric hybrid vehicle and the battery-driven car car type that is applicable at present and will develop future.

4, be applicable to the application of wanting the fuel oil car type is repacked into electronic car type.Battery-driven car has been a future trend, therefore, may have in the future some and repack the fuel oil car type demand of electronic car type into, and native system can provide solution quite easily.

Description of drawings

Fig. 1 is the power steering system principle and the control flow chart of traditional fuel oil engine vehicle in the prior art;

Fig. 2 is for being connected also the driving ancillary system principle and the control flow chart of switchable power steering among the present invention with the vehicular drive source;

Fig. 3 among the present invention with the driving ancillary system principle and the control flow chart of the connectionless independent power bearing circle in vehicular drive source;

Fig. 4 is connected and switchable power steering driving ancillary system scheme drawing with the vehicular drive source in the first embodiment of the invention;

Fig. 5 drives the ancillary system scheme drawing with the connectionless independent power bearing circle in vehicular drive source in the second embodiment of the invention.

Label declaration in the accompanying drawing is as follows:

1 vehicular drive source

The shifter in 2 pump powers source

3 pump motors

4 transmission components

5 oil feed pumps

6 power steerings oil tube

7 steering hardwarees

8 bearing circle

9 switch control units

10 main control units

11 vehicle speed detector devices

12 actuating devices

13 wheels

14 electric quantity detection apparatus

15 batteries

The specific embodiment

The present invention is a kind of driving ancillary system of intelligent power steering, sets for the driver provides the bearing circle power-assisted of multiple difference, makes bearing circle adjust the switch opportunity of power-assisted according to different vehicle condition, road conditions and driver's physiological condition.Setting content can assemble the technician by maker, dealer, the maintenance of this system, even is set by driver oneself.The standard of setting can decide according to the state of electric weight, the speed of a motor vehicle or other vehicle of battery.

Form now, and the effect and the advantage that can produce with regard to the structure of this case, conjunction with figs., it is specifically bright as follows to lift preferred embodiment of the present invention.

Please refer to Fig. 2 and Fig. 4, be the driving ancillary system of a kind of intelligent power steering of the present invention, it is mainly this ancillary system and is connected with the vehicular drive source, and switchable system, be used for drive wheels, wherein this wheel is adjusted the direction of wheel via steering hardware by a bearing circle; Oil feed pump is used to provide hydraulic oil to steering hardware, and this oil pump is controlled by the drive source of former vehicle under normal the use; This drives ancillary system, comprising:

Main control unit 10, this main control unit 10 can be a kind of assembly or device that receives sensing signal, processing signals or issue an order, for example vehicular computer, microprocessor or single-chip etc.

This main control unit 10 wherein also comprises:

Vehicle speed detector device 11, this vehicle speed detector device 11 can receive sensing signal; And

Electric quantity detection apparatus 14; This electric quantity detection apparatus 14 can receive sensing signal.

Actuating device 12; comprise primary clustering in this device 12 and can be some driven units, mechanical type or electric control group or power amplifier assembly etc.; as diode, thyristor or transistor etc., and comprise with the collocation of these assemblies to constitute required circuit unit of actuating device and protection assembly.

Battery 15, this battery 15 reaches other assembly with electric power, needs the assembly of power supply with startup; Described battery 15 can be the main battery of car electric system, also can be the independent battery that the main battery with the car electric system separates, or the battery of sharing with other electric apparatus; Battery 15 can be lead-acid battery, lithium cell, solar cell, fuel cell or other each kenel battery.

Pump motor 3, this pump motor 3 is as the source of the oil feed pump imput power of vehicle; This pump motor 3 can be simple DC motor or complicated alternating-current motor/AC motor.

The shifter 2 in pump power source, the shifter 2 in this pump power source, the imput power source of changeable oil feed pump, and the shifter 2 in this pump power source can be that hitch bar, belt, gear or other common driving device are the main device of forming assembly.

Switch control unit 9, this switch control unit 9 receives the assembly or the device of sensing signal, processing signals or issue an order; As the computing machine of driving a vehicle, microprocessor, digital signal processor, single-chip etc. can receive the assembly of sensing signal, processing signals or issue an order, the perhaps assembly of Purely mechanical.

Wherein this switch control unit 9 is changeable is one of automatic monitoring unit or manual unit, and this switch control unit 9 can be integrated into same control module with main control unit 10.

Wheel steering system comprises: vehicular drive source 1 (but can be the engine of fuel vehicle, the electrical motor of battery-driven car or the propulsion source of other powered vehicle); Oil feed pump 5, this oil feed pump 5 connects an end of a transmission component 4, and aforementioned pump motor 3 connects the other end of this transmission component 4, and pump motor 3 rotates and can drive this transmission component 4 these oil feed pumps of drive, so that oil feed pump 5 runnings; And steering hardware 7, bearing circle 8 and wheel 13.

Its action specification is as follows:

Among the present invention, the shifter 2 in this pump power source is connected between pump motor 3 and the vehicular drive source 1, the imput power source that is used for selecting this oil feed pump 5 for both one of.1 when rotating in the vehicular drive source, the input end of oil feed pump 5 can be switched to vehicular drive source 1 to be connected with it; Stop operating in vehicular drive source 1 or rev down to these oil feed pump 5 required rotating speeds when following, perhaps have other consider as: when the torsion of avoiding serving as the engine in vehicular drive source or electrical motor expends, saves the battery power consumption that electronic car owner powers etc., just the input end with this oil feed pump 5 switches to this pump motor 3, is responsible for driving this oil feed pump 5 by this pump motor 3.

The shifter 2 in this pump power source is carried out automatic guidance or is carried out manually operated control by the driver by this switch control unit 9, and when switching, this switch control unit 9 just can carry signal to give main control unit 10 to carry out the control of pump motor 3.

When the driver selected to use manual control, manually operated was selected the power resources of oil feed pump 5 to be switched to pump motor 3 or vehicular drive source 1.

During automatic guidance,, just can be automatically the power resources of oil feed pump 5 be switched to pump motor 3 when finding that rotating speed that vehicular drive source 1 offers oil feed pump 5 has been reduced to oil feed pump 5 when buying oil the required rotating speed of steering hardware into 7; When oil feed pump 5 switched to the state that is driven by pump motor 3, this main control unit 10 just can be delivered to instruction actuating device 12, and the power supply of battery 15 can be passed through and primer pump electrical motor 3, so that oil feed pump 5 runnings; Oil feed pump 5 is thrown power steering oil in the steering hardware 7 into by power steering oil tube 6, and this steering hardware 7 is a fluid pressure type mechanism, makes the driver obtain power-assisted when steering wheel rotation 8.

This main control unit 10 also can be integrated into same control module with switch control unit 9 among the present invention.

After the power resources of oil feed pump 5 switch to pump motor 3, this main control unit 10 receives the signal from this switch control unit 9, just can see through the aux. controls that this main control unit 10 carries out intelligent power steering, control kind and mode are as follows:

1, the wisdom of first simple type control: with speed is the control foundation.

Because be the opportunity that the power-assisted of bearing circle needs most in low vehicle speeds, therefore can only utilize the detected value of the speed of a motor vehicle merely, the power-assisted of carrying out power steering starts or closes.Vehicle speed detector device 11 can be delivered to this main control unit 10 with vehicle speed value and judges, again the startup of control pump electrical motor 3 with close.For example:, be higher than the just power-assisted of closing direction dish of 5km/h when the speed of a motor vehicle is lower than the power-assisted that 5km/h just starts bearing circle.

2, the wisdom of second simple type control: with the battery electric quantity is the control foundation.

Therefore carry out the electric weight that power-assisted can consume battery 15 because switch to pump motor 3, also can only utilize the electric weight of battery 15 to judge that the power-assisted of carrying out power steering starts or closes merely.Electric quantity detection apparatus 14 can be delivered to main control unit 10 with charge value and judges, again the startup of control pump electrical motor 3 with close.For example when battery electric quantity 20% when above, the power-assisted of the bearing circle that just turns on the power is just being closed below 20%.

3, advance the wisdom control of rank type: the data in conjunction with the speed of a motor vehicle and battery electric quantity are the control foundation.

Can see through the monitoring data of 10 pairs of speed of a motor vehicle of this main control unit and battery electric quantity, make and have more elastomeric power-assisted mode.For example when battery electric quantity more than the first electric weight setting value when (as 50%), the speed of a motor vehicle below first speed of a motor vehicle setting value (as: 30km/h) just start the power-assisted of bearing circle; And electric weight drops to below the first electric weight setting value, but more than the second electric weight setting value when (as: 30%), the speed of a motor vehicle (as: 15km/h) below second speed of a motor vehicle setting value just starts the power-assisted of bearing circle; When electric weight drops to below second setting value, but more than the 3rd setting value when (as 10%), the speed of a motor vehicle just can start the power assist apparatus of bearing circle in the 3rd speed of a motor vehicle setting value (as 5km/h), by that analogy.These setting values can by the manufacturing of depot, maintenance factory or this intelligence system with peddle personnel setting.

That 4, orders certainly advances rank type Based Intelligent Control function: in conjunction with the consideration of the speed of a motor vehicle and battery electric quantity, the driver can order the reference value of these main control unit 10 switch power-assisted certainly simultaneously, also is that above-mentioned 3 speed of a motor vehicle setting value and electric weight setting value can be set up on their own by the driver.

This main control unit 10 also can be designed to accept the setting from outside driver in the native system, and the opportunity that can further allow the power-assisted of the own direction initialization dish of driver open and close is more to meet the needs of each different driver, car type, road conditions.In addition, native system can have memory function, sets with record user's many groups of customs.

Please refer to Fig. 3 and Fig. 5, show the second embodiment of the present invention, employed assembly in its icon if function is same as first embodiment, then uses identical symbology, and content is not in this repeat specification.

In the present embodiment, the driving ancillary system of power steering there is no with the vehicular drive source and is connected, it is an autonomous system, catch up with an embodiment by comparison, only need to go up among the embodiment, the shifter 2 in this pump power source removes and this switch control unit 9 is integrated into same control unit with this main control unit 10, therefore structure is simpler, cost is also cheaper, in the present embodiment, oil feed pump 5 is driven by pump motor 3 purely, and irrelevant with the vehicular drive source, no matter therefore whether start of vehicular drive source can not have influence on oil feed pump 5 and whether turn round.

Its action specification is as follows:

Oil feed pump 5 is driven by pump motor 3 purely, and irrelevant with vehicular drive source 1, no matter therefore whether start of vehicular drive source can not have influence on oil feed pump 5 and whether turn round.

After Vehicle Power was opened, main control unit 10 was delivered to actuating device 12 etc. with instruction, and the power supply of battery 15 can be passed through and primer pump electrical motor 3, so that oil feed pump 5 runnings.

Oil feed pump 5 is thrown power steering oil in the steering hardware 7 into by power steering oil tube 6, and this steering hardware 7 is a fluid pressure type mechanism, makes the driver obtain power-assisted when steering wheel rotation 8.

Wherein after Vehicle Power started, this main control unit 10 just began to carry out the aux. controls of intelligent power steering, and the control kind of the aux. controls of its intelligent power steering is as follows:

Therefore carry out the electric weight that power-assisted can consume battery 5 because switch to pump motor 3, also can only utilize the electric weight of battery 15 to judge that the power-assisted of carrying out power steering starts or closes merely.Electric quantity detection apparatus 14 can be delivered to this main control unit 10 with charge value and judges, again the startup of control pump electrical motor 3 with close.For example when battery electric quantity 20% when above, the power-assisted of the bearing circle that just turns on the power is just being closed below 20%.

Can see through the monitoring data of 10 pairs of speed of a motor vehicle of this main control unit and battery electric quantity, make and have more elastomeric power-assisted mode.For example when battery electric quantity more than the first electric weight setting value when (as 50%), the speed of a motor vehicle below first speed of a motor vehicle setting value (as 30km/h) just start the power-assisted of bearing circle; And electric weight drops to below the first electric weight setting value, but more than the second electric weight setting value when (as 30%), the speed of a motor vehicle below second speed of a motor vehicle setting value (as 15km/h) just start the power-assisted of bearing circle; When electric weight drops to below second setting value, but more than the 3rd setting value when (as 10%), the speed of a motor vehicle just can start the power assist apparatus of bearing circle in the 3rd speed of a motor vehicle setting value (as: 5km/h), by that analogy.These setting values can by the manufacturing of depot, maintenance factory or this intelligence system with sell personnel setting.

That 4, orders certainly advances rank type Based Intelligent Control function: in conjunction with the consideration of the speed of a motor vehicle and battery electric quantity, the driver can make the reference value of these main control unit 10 switch power-assisted by oneself simultaneously, also is that speed of a motor vehicle setting value and the electric weight setting value in above-mentioned 3 can be set up on their own by the driver.

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.

Claims

1. A driving auxiliary system of a power steering wheel; used for driving wheels, characterized in that the direction of the wheels is adjusted by a steering wheel through a steering mechanism; the oil supply pump is used to provide hydraulic oil to the steering mechanism, and the oil supply pump can be selected from different Driving mode; the driving assistance system includes:

a pump motor, used to drive the oil supply pump;

The switching device of the pump power source, the switching device of the pump power source is connected between the pump motor and the vehicle driving source, and is used to select the input power source of the oil supply pump as one of the two, and the switching device of the pump power source is connected with the The oil supply pumps are connected by transmission components;

The switching control unit is used to control the switching device of the pump power source to make it decide to connect the pump motor or the vehicle driving source, and is a component that can receive sensing signals, process signals or issue commands;

The main control unit, used to control the start or stop of the pump motor, is a component or device that can control signal transmission;

a battery that supplies electricity to the pump motor to drive the pump motor; and

A driving device, which receives the signal from the main control unit and the voltage or current of the battery to drive the output of the pump motor;

Wherein, the switching device of the pump power source can switch the input end of the fuel supply pump to the vehicle driving source when the vehicle driving source is running; When the torque and energy of the driving source of the vehicle are consumed, the input end of the fuel supply pump can be switched to the pump motor, and the pump motor is responsible for driving the fuel supply pump; and

At the same time of switching, the switching control unit will send a signal to the main control unit to control the pump motor; the main control unit will send instructions to the driving device, so that the battery power can start the pump motor to run.

2. The driving auxiliary system of the power steering wheel according to claim 1, characterized in that, the main control unit further includes a vehicle speed detection device, when the pump power input source is switched to the pump motor and the power steering wheel is activated through the main control unit. During auxiliary control, the speed detection value of the vehicle speed detection device is used as a judgment basis to start or close the power assist of the power steering wheel.

3. The driving auxiliary system of the power steering wheel according to claim 1, wherein the main control unit further includes a power detection device, and when the pump power input source is switched to the pump motor, the power is transmitted through the main control unit. For the auxiliary control of the steering wheel, the power detection value of the power detection device is used as a basis for judgment, and the power assist of the power steering wheel is activated or deactivated according to the power.

4. The driving auxiliary system of power steering wheel according to claim 1, characterized in that, the main control unit also includes a vehicle speed detection device and a power detection device, after the pump power input source is switched to the pump motor, through the main control unit The unit performs auxiliary control of the power steering wheel, and combines the speed detection value of the vehicle speed detection device and the electric power detection value of the electric power detection device as a double control judgment basis to start or close the power assist of the power steering wheel.

5. The driving assistance system of a power steering wheel according to claim 4, wherein the judgment logic of the dual control of vehicle speed and electric quantity is as follows: when the electric quantity of the battery is above the first electric quantity setting value, the vehicle speed is set at the first electric quantity. When the value is below the power assist of the steering wheel; or add more than one set value, that is, the battery power drops below the first power setting value, but is above the second power setting value, and the vehicle speed is at the second speed setting value. The power assist of the steering wheel is activated below the set value.

6. A driving auxiliary system of a power steering wheel, which is used to drive wheels, is characterized in that the direction of the wheel is adjusted by a steering wheel through a steering mechanism; an oil supply pump provides hydraulic oil to the steering mechanism, and the oil supply pump is controlled by the driving auxiliary system Driven; the drive assist system, including:

Pump motor, used to drive the oil supply pump;

The main control unit is used to control the output force of the pump motor, the main control unit is a component or device that can control signal transmission;

A battery that provides power to the pump motor to drive the pump motor;

A drive device that receives signals from the main control unit and the voltage or current of the battery to control the output of the pump motor;

Wherein, when the vehicle power is turned on, the main control unit sends instructions to the driving device, so that the battery power passes through the starting pump motor to make the oil supply pump run.

7. The driving auxiliary system of the power steering wheel according to claim 6, wherein the main control unit further includes a vehicle speed detection device, when the pump power input source is switched to the pump motor and the power steering wheel is activated through the main control unit During auxiliary control, the speed detection value of the vehicle speed detection device is used as a judgment basis to start or close the power assist of the power steering wheel.

8. The driving auxiliary system of the power steering wheel according to claim 6, characterized in that, the main control unit further includes a power detection device, and when the pump power input source is switched to the pump motor, the power is transmitted through the main control unit. For the auxiliary control of the steering wheel, the power detection value of the power detection device is used as a basis for judgment, and the power assist of the power steering wheel is activated or deactivated according to the power.

9. The driving auxiliary system of power steering wheel according to claim 6, characterized in that, the main control unit includes: a vehicle speed detection device and a power detection device, after the pump power input source is switched to the pump motor, through the main control unit The unit performs auxiliary control of the power steering wheel, and combines the speed detection value of the vehicle speed detection device and the electric power detection value of the electric power detection device as a double control judgment basis to start or close the power assist of the power steering wheel.

10. The driving assistance system for a power steering wheel according to claim 9, wherein the judgment logic of the dual control of vehicle speed and electric quantity is as follows: when the electric quantity of the battery is above the first electric quantity setting value, the vehicle speed is set at the first electric quantity. When the value is below the power assist of the steering wheel; or increase more than one set value, that is, the battery power drops below the first power set value, but is above the second power set value, and the vehicle speed is at the second speed set value The power assist of the steering wheel is activated at the following times.