CN100591561C - A monitoring system for torsional moment of mixing dynamical vehicle - Google Patents

A monitoring system for torsional moment of mixing dynamical vehicle Download PDF

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Publication number
CN100591561C
CN100591561C CN200710145920A CN200710145920A CN100591561C CN 100591561 C CN100591561 C CN 100591561C CN 200710145920 A CN200710145920 A CN 200710145920A CN 200710145920 A CN200710145920 A CN 200710145920A CN 100591561 C CN100591561 C CN 100591561C
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torque
torsion
moment
controller
engine
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CN101157360A (en
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江兆周
孙玉玲
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Chery Automobile Co Ltd
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SAIC Chery Automobile Co Ltd
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Abstract

The invention describes a safety monitoring system and a monitoring method for the torque output by a power assembly of a hybrid vehicle. The safety monitoring system and the monitoring method can beused for preventing the entire output torque from increasing and reducing accidently to provide relatively reliable protection for every module in the hybrid system, thereby ensuring the safety performance of the hybrid system. The torque monitoring of the safety monitoring system relates to three main controllers, including a hybrid control unit, an engine management system and the hybrid safetymonitoring system, and respectively monitors the real output torque of the entire vehicle, a motor and the engine; the system can monitor the entire torque in normal mode and failure mode; the monitoring in normal mode can ensure the accurate explain of the entire real output torque; while the monitoring in failure mode can limit the entire real entire output torque.

Description

A kind of monitoring system of mixing dynamical vehicle torsional moment
Technical field
The application relates to hybrid vehicle safety control field, particularly relates to a kind of monitoring system of mixing dynamical vehicle torsional moment.
Background technology
Along with present global warming phenomenon is on the rise, and more and more nervous contradiction between oil supply and demand, " environmental protection and energy-conservation ", " people, car, perfect naturally harmonious " become the public topic of automotive field already.
Hybrid vehicle is reasonably combined motor and engine drive system; bring into play motor-driven advantage and remedy engine-driven weakness; make driving engine remain on optimum condition work, can realize the functions such as idle stop, assistive drive and regenerating braking energy recovery of driving engine.Therefore, hybrid vehicle had both improved the driving performance of vehicle, had saved expenditure of energy, had also reduced engine emission simultaneously, had given full play to the advantage of internal-combustion engines vehicle and electronlmobil, was the anti-emission carburetor and the low oil consumption automobile of the actual exploitation of now tool meaning.
But hybrid vehicle control more complicated, comparing with common car needs to consider special Security Control Problem, mainly contain following some: 1. start the engine when power system engages; 2. driving engine hang-up or stall; 3. driving engine accidental activation; 4. driving engine can't restart; 5. unexpected driving torque increases; 6. unexpected driving torque reduces; 7. unexpected brake torque reduces.In order to guarantee the work of carrying out of system's normal reliable, to driving engine start and stop control and driving engine, that Motor torque is implemented safety monitoring is extremely important.
Summary of the invention
The invention describes a kind of hybrid power automobile power assembly output torque safety monitoring system that is used for; be used to prevent the accident increase of car load output torque or reduce; for each module of hybrid power system provides reliable protection, guarantee the work of carrying out that hybrid power system can safety.
The torque monitoring of safety monitored control system relates to three major control devices: hybrid power control unit (HCU), engine management system (EMS) and hybrid power safety monitoring system (SM).The operational mode of each controller all is divided into initialization, normal operation mode and failure operation pattern.The safety monitored control system has carried out rational control by the communication of three controllers to the operational mode of each controller.
The safety monitored control system is mainly monitored respectively car load real output moment of torsion, motor real output moment of torsion and driving engine real output moment of torsion.For car load real output moment of torsion, be divided into the monitoring that under normal mode, reaches under the failure mode, be the correctness of explaining in order to ensure moment of torsion to the monitoring of car load real output moment of torsion under the normal mode, and under failure mode, be in order to limit the real output moment of torsion car load real output torque monitoring.The correctness that output torque distributes has been guaranteed in the monitoring of driving engine real output moment of torsion and motor real output moment of torsion.Therefore, this monitored control system can guarantee that the car load output torque can guarantee the correctness of driving engine, motor output torque again, to whole hybrid power control system carried out carefully, comprehensively monitoring, make the work of carrying out that hybrid power system can be safe and reliable.
Description of drawings
Fig. 1: hybrid power system of the present invention is formed scheme drawing;
Fig. 2: hybrid power system torque structure figure;
Fig. 3: the torque monitoring schematic diagram that is the SM controller;
Fig. 4: HCU, SM and EMS operational mode and the schematic diagram of intercommunication mutually thereof.
The specific embodiment
As shown in Figure 1, driving engine 1, motor 3 and change speed gear box 4 link to each other by an axle 2 machineries, promptly adopt starter/generator integrated (ISG) structure.Hybrid controller (HCU) 12, hybrid power security monitoring controller (SM) 11, engine management system (EMS) 8, electric machine controller (MCU) 13, battery management system (BMS) 14 and Automatic Transmission controller (AMT) 10 communicate by CAN bus 9.The monitored control system formed in this hybrid power system of hybrid controller (HCU) 12, hybrid power security monitoring controller (SM) 11, engine management system (EMS) 8 wherein.Hybrid controller (HCU) is a master controller, and EMS, MCU are torque demand output driving engine, the Motor torques that sends according to this controller.
As shown in Figure 2, the moment of torsion of safety monitored control system is explained and is finished by engine management system EMS.Comprising EMS moment of torsion explanation module be used for determining driver's demand torque according to the operation of driving: at first determine moment of torsion needs parameter according to the rotating speed of accelerator pedal signal and driving engine this moment, compare the big value of getting among both with cruising control torque demand parameter then, determine driver's demand torque again, consider the influence of idle-speed control at last, this moment of torsion and the addition of driver's demand torque are just obtained the car load demand torque demand torque.The demand torque of the total demand moment of torsion that provides according to EMS of master controller HCU, demand torque that the AMT control module obtains and other external control module is arbitrated and is obtained engine demand output torque and motor demand output torque then, distribute driving engine and motor demand output torque, realize the demand torque that HCU provides by EMS and MCU at last.
Fig. 3 is the torque monitoring schematic diagram of SM controller.Mainly comprise four detections, relatively 4 is detections of carrying out under failure mode, other be the detection of under normal mode of operation, carrying out.
Compare 1: determine the output torque that car load allows according to outside input (comprising engine speed, accelerator pedal signal and engine catalyst temperature etc.), calculate the tolerance of this moment of torsion then, see that car load real output moment of torsion (being obtained by driving engine real output moment of torsion and the addition of motor real output moment of torsion) is in the scope that allows output torque.Relatively 1 mainly is the correctness that detects the torque demand that the moment of torsion explanation module obtains, and guarantees that the real output moment of torsion can be not too high.
Relatively 2 and relatively 3 is respectively the output torque of engine output torque and motor to be detected, and it is consistent with demand torque to guarantee them.
Relatively 4 mainly is to guarantee under failure mode, and the real output moment of torsion one of car load fixes in the scope that allows output torque.
Fig. 4 shows the operational mode of HCU, SM and EMS and intercommunication mutually thereof.HCU, SM and EMS can be divided into initialization, normal operation mode and failure operation pattern.
At initial phase, each controller is finished the detection to oneself state, and some of hybrid power device are detected, as detection to the CAN bus, and high-tension battery state-detection, the detection of high-tension battery shutoff device etc.
HCU only just can enter normal operation mode receiving the SM initialization completion signal; EMS only just can enter normal operation mode after HCU, SM finish initialization.
Under the car load operational mode, SM can monitor the moment of torsion of car load.If comparison 1,2,3 is failed then SM enters failure mode.HCU, EMS also have the error-detecting system of oneself, and HCU mainly detects hybrid powder motor, battery failures etc., and EMS mainly detects accelerator pedal signal, engine rotational speed signal etc.If HCU or EMS detect any fault, then it enters failure mode.
HCU, EMS also have the error-detecting system of oneself.If detecting, initialization failure or security monitoring find that et out of order all can enter the failure operation pattern.Any controller enters the failure operation pattern and can require its controller also to enter the failure operation pattern.
During failure mode, SM also will carry out safety monitoring, and promptly to relatively 4 detection, relatively 4 mainly is to guarantee under failure mode, and the real output moment of torsion one of car load fixes in the scope that allows output torque.If not satisfying, comparison 4 require car load to shut down.
This monitored control system can guarantee that the car load output torque can guarantee the correctness of driving engine, motor output torque again, to whole hybrid power control system carried out carefully, comprehensively monitoring, make the work of carrying out that hybrid power system can be safe and reliable.

Claims (9)

1, the monitored control system in a kind of hybrid power system, comprise hybrid controller (12), hybrid power security monitoring controller (11), engine management system (8), wherein hybrid controller (12) is a master controller, torque demand output driving engine, Motor torque that security monitoring controller (11) and engine management system (8) send according to hybrid controller (12), engine management system (8) is determined driver's demand torque according to the operation of driving; Engine management system comprises the moment of torsion explanation module, its rotating speed according to accelerator pedal signal and driving engine is determined moment of torsion needs parameter, compare the big value of getting among both with cruising control torque demand parameter then, determine driver's demand torque again, consider the influence of idle-speed control at last to demand torque, with obtain both in big value and the addition of driver's demand torque obtain the car load demand torque, hybrid controller (12) and engine management system (8) have the error-detecting system of oneself, hybrid controller (12) mainly detects hybrid powder motor, battery failures, engine management system (8) mainly detects accelerator pedal signal, engine rotational speed signal.
2, monitored control system according to claim 1, it is characterized in that: the demand torque of the total demand moment of torsion that provides according to engine management system moment of torsion explanation module as the hybrid controller (12) of master controller, demand torque that the control module in the Automatic Transmission controller (10) obtains and other external control module is arbitrated and is obtained engine demand output torque and motor demand output torque, distribute driving engine and motor demand output torque, realize the demand torque that hybrid controller provides by engine management system and electric machine controller at last.
3, a kind of hybrid power system that comprises claim 1 or 2 described monitored control systems, also comprise driving engine (1), motor (3), change speed gear box (4), electric machine controller (13), battery management system (14) and Automatic Transmission controller (10), wherein driving engine (1), motor (3) and change speed gear box (4) link to each other by an axle (2) machinery; Monitored control system, electric machine controller (13), battery management system (14) and Automatic Transmission controller (10) communicate by CAN bus (9).
4, utilize claim 1 or 2 described monitored control systems to carry out the method for torque monitoring, it is characterized in that: hybrid power security monitoring controller (11) is monitored the moment of torsion of car load, comprises comparison 1,2,3:
Compare 1: the output torque of importing to determine the car load permission according to the outside, then according to the tolerance of this moment of torsion, determine that car load real output moment of torsion is whether in the scope that allows output torque, relatively 1 by detecting the correctness of the torque demand that the moment of torsion explanation module obtains, and guarantees that the real output moment of torsion can be not too high;
Compare 2: the output torque to driving engine detects, and guarantees that it is consistent with the engine demand moment of torsion;
Compare 3: the output torque to motor detects, and guarantees that it is consistent with the motor demand torque.
5, method according to claim 4 is characterized in that: if relatively 1,2,3 failures, then hybrid power security monitoring controller (11) enters failure mode.
6, method according to claim 5 is characterized in that: also comprise comparison 4, guarantee under failure mode that the real output moment of torsion one of car load fixes in the scope that allows output torque.
7, according to claim 4 or 5 or 6 described methods, it is characterized in that: if hybrid controller (12) or engine management system (8) detect any fault, then it enters failure mode.
8, method according to claim 4 is characterized in that: outside input comprises engine speed, accelerator pedal signal and engine catalyst temperature.
9, method according to claim 4 is characterized in that: car load real output moment of torsion is obtained by driving engine real output moment of torsion and the addition of motor real output moment of torsion.
CN200710145920A 2007-08-31 2007-08-31 A monitoring system for torsional moment of mixing dynamical vehicle Active CN100591561C (en)

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