CN102774377A - Torque monitoring system of hybrid power automobile - Google Patents
Torque monitoring system of hybrid power automobile Download PDFInfo
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- CN102774377A CN102774377A CN2011101230647A CN201110123064A CN102774377A CN 102774377 A CN102774377 A CN 102774377A CN 2011101230647 A CN2011101230647 A CN 2011101230647A CN 201110123064 A CN201110123064 A CN 201110123064A CN 102774377 A CN102774377 A CN 102774377A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/62—Hybrid vehicles
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Abstract
The invention provides a torque monitoring system of a hybrid power automobile. The torque monitoring system comprises a whole vehicle controller, an engine controller and a motor controller, wherein the engine controller comprises an engine torque monitoring module, the motor controller comprises a motor torque monitoring module, the engine torque monitoring module collects real engine torque, compares the collected torque with an allowable torque indicated by an engine allowable torque signal and monitors the real engine torque, and the motor torque monitoring module collects real motor torque, compares the collected torque with an allowable motor torque indicated by a motor allowable torque signal and monitors the real motor torque. The torque monitoring system can effectively guarantee the traffic safety.
Description
Technical field
The present invention relates to hybrid vehicle, relate in particular to the torque monitoring of hybrid vehicle.
Background technology
The hybrid vehicle that motor and driving engine are reasonably combined can be realized idle stop, electric motor starting, intelligent charge, regenerative brake, motor power-assisted, electronic mixed power function such as creep, and has low oil consumption, long, the technology maturity advantages of higher of continual mileage.
The power of hybrid vehicle generates with transmission to be reached by a series of parts such as driving engine, mixed power motor, high voltage power battery, change speed gear boxs usually.By matched well and the optimal control between these parts, can when avoiding combustion engine powered and EMF Electronmotive Force deficiency separately, give full play to their advantage.
Driving engine and hybrid powder motor are two propulsions source of hybrid vehicle.Entire car controller (HCU) is the core of car load control, its control engine management system (EMS) and electric machine controller (MCU), and then the moment of torsion of control driving engine and motor.As the control unit that sends the torque request instruction, entire car controller must be maintained at safe and reliable mode of operation.
In the prior art, usually be the actual torque of monitoring motor and driving engine by entire car controller respectively through engine controller and electric machine controller.Like publication number is China's patent of CN101066674A, just disclose the framework and the system of such safe torque monitor system.But in the practical application, find that this structure one is that structure is unclear, the situation that entire car controller can't monitor driving engine and motor actual torque through electric machine controller and engine controller possibly take place besides in some cases.
Summary of the invention
In view of this, the present invention provides a kind of monitoring system of mixing dynamical vehicle torsional moment, can effectively address the above problem.The torque monitoring system of hybrid vehicle provided by the invention; Comprise and generate the entire car controller that engine torque signal, Motor torque signal, driving engine permission torque signal and motor allow torque signal; Receive said engine torque signal and make driving engine realize the engine controller of corresponding torque according to this signal; And receive said Motor torque signal and make motor realize the electric machine controller of corresponding torque according to this signal; Said engine controller comprises the engine torque monitoring module, and said electric machine controller comprises the Motor torque monitoring module, wherein; Said engine torque monitoring module is gathered the driving engine actual torque; And allow the indicated permission moment of torsion of torque signal to compare the moment of torsion of being gathered and the said driving engine, so that the driving engine actual torque is monitored, said Motor torque monitoring module is gathered the motor actual torque; And allow the indicated motor of torque signal to allow moment of torsion to compare the moment of torsion of being gathered and the said motor, so that the motor actual torque is monitored.
Preferably, in the monitored control system provided by the invention, when said engine torque monitoring module allows big first predetermined value of the indicated permission moment of torsion of torque signal at the said driving engine of the torque ratio of being gathered, send the control signal that engine torque is reduced.
Preferably, in the monitored control system provided by the invention, when said engine torque monitoring module allows big first predetermined value of the indicated permission moment of torsion of torque signal at the said driving engine of the torque ratio of being gathered, send and make engine torque reduce to 0 control signal.
Preferably, in the monitored control system provided by the invention, when said Motor torque monitoring module allows big second predetermined value of the indicated permission moment of torsion of torque signal at the said motor of the torque ratio of being gathered, send the control signal that Motor torque is reduced.
Preferably; In the monitored control system provided by the invention; Said entire car controller comprises car load moment of torsion processing module and car load moment of torsion security module; The engine torque that wherein said car load moment of torsion processing module calculation engine moment of torsion and Motor torque and foundation are calculated generates engine torque signal; Generate the Motor torque signal according to the Motor torque that is calculated, the driving engine that said car load moment of torsion security module calculation engine allows moment of torsion and foundation to be calculated allows moment of torsion to generate driving engine and allows torque signal, and the calculating motor allows moment of torsion and generate motor according to it to allow torque signal.
Preferably; In the monitored control system provided by the invention; Said engine controller also comprises engine torque processing module and engine torque limiting module; Said engine torque processing module is carried out filtering to the engine torque signal that is received, and the engine torque limiting module allows torque signal to limit filtered engine torque signal with driving engine.
Preferably, in the monitored control system provided by the invention, said electric machine controller also comprises the Motor torque limiting module, is used for allowing signal to limit said Motor torque signal with motor.
Preferably, in the monitored control system provided by the invention, said motor is for mixing moving motor.
The monitored control system of hybrid vehicle provided by the invention can more effectively be realized the monitoring to Motor torque and engine torque, thereby the safety of vehicle is provided.
Description of drawings
Fig. 1 is the exemplary configurations scheme drawing of the torque monitoring system of hybrid vehicle of the present invention; And
Fig. 2 is the exemplary power system structural representation of hybrid vehicle of the present invention.
The specific embodiment
Below will combine accompanying drawing further to set forth the present invention.Need to prove that following embodiment is merely of the present invention exemplary and non-limiting explanation.Although the present invention has been carried out detailed explanation with reference to the following specific embodiment and example thereof; But those of ordinary skill in the art is to be understood that under the situation that does not break away from spirit of the present invention; Still but specific embodiments of the invention is made amendment or the part technical characterictic is equal to replacement, and above-mentioned modification and replacement should be by containing in claim of the present invention.
Fig. 1 is the torque monitoring exemplary system property structural representation of hybrid vehicle of the present invention.As shown in the figure, said system 1 comprises entire car controller 10, engine controller 20 and electric machine controller 30.Entire car controller 10 comprises car load moment of torsion processing module 101 and car load moment of torsion security module 103.Engine controller 20 comprises engine torque processing module 201, engine torque limiting module 203 and engine torque monitoring module 205.Electric machine controller 30 comprises Motor torque limiting module 303 and Motor torque monitoring module 305, alternatively, can comprise Motor torque processing module 301.Here need to prove that engine parts processing module and motor component processing module that car load moment of torsion processing module 101, engine torque processing module 201, Motor torque processing module 301 (if having) and hereinafter will be mentioned in describing can be generically and collectively referred to as functional layer; Car load moment of torsion security module 103 also can be described as safe floor; Engine torque limiting module 203 can be generically and collectively referred to as limiting layer with Motor torque limiting module 303; And engine torque monitoring module 205 can be generically and collectively referred to as supervisory layers with Motor torque monitoring module 305.
The moment of torsion processing module 101 of entire car controller 10 receives the torque request signal through its torque request processing unit 1010, and the torque request signal that is received is handled, to calculate the total torque of power system desired output.This torque request signal can be the acceleration pedal signal that engine controller 20 sends over; As an example; This acceleration pedal signal can be given entire car controller 10 through the CAN bus transfer by engine controller 20, and outside the CAN of routine communication verification, this signal also can increase further checking signal; Like the Checksum verification, to guarantee the correctness of signal transmission.
The torque request processing unit 1010 of entire car controller 10 is according to needed total torques of information calculations such as acceleration pedal, brake pedal, the speed of a motor vehicle, rotating speed, gears.The torque distribution unit 1011 of entire car controller 10 is target based on driving engine and efficiency of motor with the whole efficiency that improves power system, and the total torque that is calculated is distributed to driving engine and motor.Briefly, torque distribution unit 1011 is according to the hybrid dynamic system pattern, the total torque of power system desired output reasonably is distributed into to the moment of torsion of driving engine and the moment of torsion of motor, and the moment of torsion that is distributed is transported out.In this example, the hybrid dynamic system pattern can comprise and closes (OFF), engine cold-start, traditional vehicle pattern, idling charge system, intelligent charge, motor power-assisted, regenerative braking isotype; Correspondingly, to different hybrid dynamic system patterns, adopt different torque distribution modes, so that the torque demand of chaufeur is distributed to driving engine and motor.According to an example of the present invention; Distribution based on the 1011 pairs of moments of torsion in torque distribution unit; To flow to engine controller 20 in order to the engine torque signal that the moment of torsion of driving engine is distributed in indication, will send into moment of torsion arbitration unit 1012 in order to the Motor torque signal that the moment of torsion of motor is distributed in indication.Need to prove that this example only is used for schematically explaining practical implementation of the present invention, the engine torque signal that does not at this point limit based on the moment of torsion of distributing to driving engine must directly send to engine controller 20 by torque distribution unit 1011.
The moment of torsion arbitration unit 1012 of entire car controller 10 is arbitrated Motor torque according to operating modes such as the automatic start-stop of vehicle, regenerative braking, high-tension battery electric quantity balancings, then the Motor torque signal is sent to electric machine controller 30, to realize the torque demand to motor.In other words; Because motor need be realized multiple functions such as driving, energy feedback, engine start/stop; Must arbitrate it by moment of torsion arbitration unit 1012 so distribute to the moment of torsion of motor, generate corresponding Motor torque signal according to arbitration result then, send to motor.As an example; Moment of torsion arbitration unit 1012 from the torque distribution unit 1011 receive to give motor torque signal; And based on the hybrid dynamic system pattern of the vehicle of mentioning in the preceding text; Select suitable Motor torque to generate the Motor torque signal from a plurality of Motor torques respectively, send it to electric machine controller 30 again.Briefly; Motor torque concrete calculated according to the difference of mixing the dynamic model formula and different; The mode of for example under the intelligent charge pattern, distributing based on efficient is come distribute torque; Under the motor assistant mode, provide positive driving torque to distribute, under the regenerative braking pattern, provide negative driving torque to distribute etc. based on motor based on motor.In the practical application; Partial function piece in the moment of torsion arbitration unit 1012; Such as from a plurality of engine torques, selecting suitable moment of torsion to generate engine torque signal according to the hybrid dynamic system pattern and sending to the function of engine controller, also can be integrated in the torque distribution unit.
Can pass through the CAN bus communication between entire car controller 10 and engine controller 20 and the electric machine controller 30.The signal that between entire car controller 10 and engine controller 20 and electric machine controller 30, transmits can relate to the signal of information such as acceleration pedal, brake pedal, the speed of a motor vehicle, rotating speed, gear.Otherwise engine controller 20 can send to entire car controller 10 through the CAN bus and comprise signals such as accelerator pedal position signal, engine speed, driving engine indication torque, engine friction torque, maximum engine torque, driving engine minimal torque; Electric machine controller 30 can send signals such as motor speed, motor actual torque, motor temperature to entire car controller 10 through the CAN bus.In the above-mentioned signal; Accelerator pedal position signal, engine rotational speed signal and driving engine minimal torque will be used in as mentioned below driving engine is allowed in the calculating of moment of torsion, and accelerator pedal position signal, motor speed signal then are used in as mentioned below motor is allowed in the calculating of moment of torsion; And other signal also will be used for the calculating to moment of torsion such as entire car controller moment of torsion processing module 101, engine controller moment of torsion processing unit 201 and electric machine controller moment of torsion processing unit 301 as required.Need to prove; According to the present invention, based on concerning, so engine speed and motor speed can be changed each other through the fixing speed ratio of existence between belt bonded assembly driving engine and the motor; So in examples more of the present invention, substitute the motor signal with engine signal and calculate Motor torque.
In entire car controller 10, car load moment of torsion security module 103 is according to current driving engine or rotating speed of motor, and acceleration pedal position signal, calculates the permission moment of torsion of driving engine and motor under the current working respectively, and generates in view of the above and allow torque signal.According to the embodiment of the present invention, calculate the permission moment of torsion of driving engine under the current working according to current engine speed and acceleration pedal position signal, and generate driving engine permission torque signal by engine health unit 1031; Calculate the permission moment of torsion of motor under the current working by motor safety unit 1032 according to current motor speed and acceleration pedal position signal, and generate motor permission torque signal.This driving engine allows torque signal to send to engine controller 20, and this motor allows torque signal to send to electric machine controller 30.Preferably, the permission moment of torsion of the driving engine that is calculated and the permission moment of torsion of motor all should be slightly larger than normal moment of torsion, that is can not influence normal functional layer moment of torsion.
Below be example with the signal that relates to accelerator pedal position, the system of Fig. 1 is described.Entire car controller 10 is after receiving acceleration pedal position signal; The position signal of current engine speed and acceleration pedal calculates the driving engine requested torque (based on context be also referred to as driving engine and allow moment of torsion) that allows under the current working according to vehicle in car load moment of torsion security module 103; Position signal according to motor speed and acceleration pedal calculates the motor requested torque (based on context be also referred to as motor and allow moment of torsion) that allows under the current working, and further allows moment of torsion and motor to allow moment of torsion to be sent to engine controller 20 and electric machine controller 30 respectively in the driving engine that calculates.
Engine torque monitoring module 205 is received from the driving engine that sends engine health unit 1031 and allows torque signal, and will allow the moment of torsion of related permission moment of torsion of torque signal and the actual generation of driving engine to compare.At the driving engine actual torque greater than said permission moment of torsion; And when the difference of driving engine actual torque and this permission moment of torsion reaches first predetermined value; Engine controller 20 sends breakdown signal, makes correlation function module or equipment can carry out fault handling, also can remind operating personal; When the difference of preferred engine actual torque and this moment of torsion reached first predetermined value, engine controller 20 sent breakdown signal, and sent and to make engine torque reduce to 0 control signal to give driving engine.In the practical application, but this first predetermined value so that actual torque when allowing moment of torsion greater than this also support vehicles safety get final product, it can be different because of particular case.When engine controller 20 produces the torque monitoring fault; Engine controller 20 is interrupted with communicating by letter of entire car controller 10; Make automobile get into the limping pattern, that is entire car controller 10 does not respond the acceleration pedal request; Driving engine is kept high idle speed and is rotated, and hybrid electric motor operates in generator mode.
As described herein; According to the present invention; Entire car controller 10 generates torque signal, and the actual torque of 205 pairs of driving engines of engine torque monitoring module of engine controller 20 is monitored, not only clear in structure; And when between entire car controller 10 and engine controller 20, communication failure occurring, still can realize monitoring to actual torque.
According to embodiments of the invention, the torque monitoring system of hybrid vehicle can also comprise verification module 40.Verification module 40 can be implemented first module, second module and the 3rd module.Memory unit (not shown) in the first module independent detection entire car controller etc., and when memory unit breaks down, entire car controller is restarted; Second module detects the memory unit (not shown) in the electric machine controller etc., and when memory unit breaks down, electric machine controller is restarted; The 3rd module is then through the catechetical verification between entire car controller and electric machine controller, to check part or the parts that relate to calculating in entire car controller and the electric machine controller.
In sum, when driving engine or motor occur that moment of torsion is unexpected to be increased, can these unexpected increases be detected and carry out suitable fault handling, guarantee the moment of torsion safety of car load, and then guarantee the safety of vehicle and chaufeur according to torque monitoring of the present invention system.And according to the present invention, entire car controller cooperatively interacts the output torque signal through its moment of torsion processing module 101 and moment of torsion security module 103.Engine controller and electric machine controller are then realized the moment of torsion of driving engine and motor respectively according to received torque signal, and respectively the actual torque of driving engine and motor are monitored.This shows; The torque monitoring system of hybrid vehicle of the present invention; Separately its control driving engine and motor are carried out torque monitoring by engine controller and electric machine controller; Clear in structure not only, and avoided the following problem that possibly occur in the prior art: because entire car controller monitors the actual torque of motor and driving engine, when causing between entire car controller and electric machine controller or engine controller, communication failure occurring; Just can't communicate by letter with electric machine controller or engine controller, thereby can't monitor the driver stage of electric machine controller or engine controller.
In all examples of the present invention, what term " motor " referred to is to mix moving motor.Term " mixes moving motor " and is meant the motor that is used for hybrid vehicle; Generally speaking; It provides energy by high-tension battery; And should mix moving motor driving torque can be provided, also can be used for generating, to realize for example hybrid power functions such as the automatic start-stop function of driving engine, intelligent charge function, motor additional function, motor feedback function.In addition, entire car controller, electric machine controller and engine control can be respectively realized with example, in hardware, also can be implemented in the suitable hardware by software mode, and for example dsp processor etc. only needs it can reach function according to the invention and gets final product.
Fig. 2 is exemplary power system structural representation of the present invention.This figure has simply illustrated the monitored control system of above-described mixing dynamical vehicle torsional moment and the relation between the automobile dynamic system.As shown in the figure, motor 4 and driving engine 1 link to each other through belt, and the power that motor and/or driving engine produced inputs to wheel through change speed gear box 2 and main reduction gear 3.Motor 4 links to each other with motor inverter 5, and these both by battery 6 power supplies.According to the present invention, as shown in Figure 2, motor 4 and motor inverter 5, and be connected through high-tension line (HV:high voltage) respectively between motor inverter 5 and the battery 6.Motor inverter 5 is by electric machine controller 30 controls, and battery 6 is by battery management system 11 controls.1 in driving engine passes through engine controller 20 controls.Change speed gear box 2 is by gearbox control 8 controls.Example ground, entire car controller 10 is connected through CAN bus 60 with engine controller 20, gearbox control 8, electric machine controller 30 and battery management system 11.Entire car controller 10 receives vehicle-state through CAN bus 60 from each controller, and sends torque signal and give engine controller 20 and electric machine controller 30.
It is explanatorily exemplary to attach Fig. 1 and 2 institute like above combination, through torque monitoring of the present invention system, can effectively moment of torsion be monitored, thereby has guaranteed the safety of moment of torsion output.
Claims (8)
1. the torque monitoring system of a hybrid vehicle; Comprise and generate the entire car controller that engine torque signal, Motor torque signal, driving engine permission torque signal and motor allow torque signal; Receive said engine torque signal and make driving engine realize the engine controller of corresponding torque according to this signal; And receive said Motor torque signal and make motor realize the electric machine controller of corresponding torque according to this signal, it is characterized in that said engine controller comprises the engine torque monitoring module; Said electric machine controller comprises the Motor torque monitoring module; Wherein, said engine torque monitoring module is gathered the driving engine actual torque, and allows the indicated permission moment of torsion of torque signal to compare moment of torsion of being gathered and said driving engine; So that the driving engine actual torque is monitored; Said Motor torque monitoring module is gathered the motor actual torque, and allows the indicated motor of torque signal to allow moment of torsion to compare moment of torsion of being gathered and said motor, so that the motor actual torque is monitored.
2. torque monitoring according to claim 1 system; It is characterized in that; When said engine torque monitoring module allows big first predetermined value of the indicated permission moment of torsion of torque signal at the said driving engine of the torque ratio of being gathered, send the control signal that engine torque is reduced.
3. torque monitoring according to claim 2 system; It is characterized in that; When said engine torque monitoring module allows big first predetermined value of the indicated permission moment of torsion of torque signal at the said driving engine of the torque ratio of being gathered, send and make engine torque reduce to 0 control signal.
4. according to any described torque monitoring system in the claim 1 to 3; It is characterized in that; When said Motor torque monitoring module allows big second predetermined value of the indicated permission moment of torsion of torque signal at the said motor of the torque ratio of being gathered, send the control signal that Motor torque is reduced.
5. according to any described torque monitoring system in the claim 4; It is characterized in that; Said entire car controller comprises car load moment of torsion processing module and car load moment of torsion security module; The engine torque that wherein said car load moment of torsion processing module calculation engine moment of torsion and Motor torque and foundation are calculated generates engine torque signal; Generate the Motor torque signal according to the Motor torque that is calculated, the driving engine that said car load moment of torsion security module calculation engine allows moment of torsion and foundation to be calculated allows moment of torsion to generate driving engine and allows torque signal, and the calculating motor allows moment of torsion and generate motor according to it to allow torque signal.
6. torque monitoring according to claim 4 system; It is characterized in that; Said engine controller also comprises engine torque processing module and engine torque limiting module; Said engine torque processing module is carried out filtering to the engine torque signal that is received, and the engine torque limiting module allows torque signal to limit filtered engine torque signal with driving engine.
7. according to the said torque monitoring of claim 6 system, it is characterized in that said electric machine controller also comprises the Motor torque limiting module, be used for allowing signal to limit said Motor torque signal with motor.
8. torque monitoring according to claim 4 system is characterized in that, said motor is for mixing moving motor.
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| CN110356399A (en) * | 2018-04-08 | 2019-10-22 | 上海汽车集团股份有限公司 | A kind of method and apparatus of dynamical system torque monitoring |
| CN110549854A (en) * | 2018-05-31 | 2019-12-10 | 上海汽车集团股份有限公司 | torque monitoring method and system |
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