CN102267454B - Cold-start control system and method of hybrid vehicle and hybrid vehicle - Google Patents
Cold-start control system and method of hybrid vehicle and hybrid vehicle Download PDFInfo
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- CN102267454B CN102267454B CN2010101958664A CN201010195866A CN102267454B CN 102267454 B CN102267454 B CN 102267454B CN 2010101958664 A CN2010101958664 A CN 2010101958664A CN 201010195866 A CN201010195866 A CN 201010195866A CN 102267454 B CN102267454 B CN 102267454B
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Abstract
The invention provides a cold-start control system and method of a hybrid vehicle and the hybrid vehicle, wherein the system comprises an engine management module, a motor control module, a battery management module and a hybrid control module, wherein the engine management module is used for acquiring engine parameters; the motor control module is connected with a first motor and is used for acquiring the motor parameters of the first motor; the battery management module is connected with a battery and is used for acquiring battery parameters; the hybrid control module is respectively connected with the engine management module, the battery management module and the motor control module and is used for controlling the switched starting of the first motor or a second motor according to the engine parameters, the motor parameters and/or the battery parameters so as to drive the starting of an engine; and the power of the second motor is less than that of the first motor. According to the invention, the protection for the battery of the motor and the like when in cold start under the low-temperature environment is achieved.
Description
Technical field
The present invention relates to the automobile control technology, particularly a kind of cold start of hybrid electric vehicle control system and method and hybrid vehicle.
Background technology
In recent years, in order significantly to improve Vehicle Economy and to reduce discharge, energy-conservation very extensive with the appearance of new-energy automobile technology, mainly comprise: Technology of Hybrid Electric Vehicle, diesel technology, gas fuel technology, flexible fuel technology, pure electrokinetic technique, fuel cell technology.It is particularly outstanding that every technology has all obtained the development of tremendous development, particularly Technology of Hybrid Electric Vehicle, and Technology of Hybrid Electric Vehicle is to obtain the earliest the technology that scale industrialization is broken through.Technology of Hybrid Electric Vehicle has the not available advantage in the majority of other technologies, and it had both improved the fuel consumption and emission problem to a certain extent, did not rely on again the construction of basic amenities, more was not subject to the restriction of continual mileage.
In the hybrid vehicle of prior art, comprising power, larger large motor is i.e. the second motor of the smaller small machine of the first motor and power, for driving engine starting; Because small machine noise in start-up course is larger, generally adopt large electric motor starting, this large motor is powered to it by battery.But the problem existed is, such as waiting northeastward severe cold area, while especially under the environment of special low temperature, carrying out cold start-up, still adopt at present large electric motor starting, and owing to may occurring the reasons such as engine resistance torque is large under low temperature environment, easily cause large motor and be the infringement of the battery of its power supply, reduce its service life.
Summary of the invention
The purpose of this invention is to provide a kind of cold start of hybrid electric vehicle control system and method and hybrid vehicle, protection dynamo battery when realizing under low temperature environment cold start-up.
The invention provides a kind of cold start of hybrid electric vehicle control system, comprising:
Engine management module, for gathering engine parameter;
Motor control module, for gathering the parameter of electric machine of the first motor;
Battery management module, for gathering battery parameter;
The hybrid power control module, with described engine management module, battery management module and motor control module, be connected respectively, be used for according to described engine parameter, the parameter of electric machine and/or battery parameter, control switching startup the first motor or the second motor to drive described engine starting, the power of described the second motor is less than the power of described the first motor.
The invention provides a kind of hybrid vehicle, comprise driving engine, the first motor, the second motor and battery; Described battery is connected to be powered with described the first motor; The power of described the second motor is less than the power of described the first motor, described the first motor is connected with described driving engine respectively with the second motor, for driving described engine starting, described hybrid vehicle also to comprise above-mentioned cold start of hybrid electric vehicle control system.
The invention provides a kind of cold start of hybrid electric vehicle control method, comprising:
Step 1, engine management module gather engine parameter, and motor control module gathers the parameter of electric machine of the first motor, and battery management module gathers battery parameter;
Step 2, described engine management module, battery management module and motor control module transfer to the hybrid power control module by described engine parameter, the parameter of electric machine and battery parameter respectively;
Step 3, described hybrid power control module are according to described engine parameter, the parameter of electric machine and/or battery parameter, control switching described the first motor of startup or the second motor to drive described engine starting, the power of described the second motor is less than the power of described the first motor.
Cold start of hybrid electric vehicle control system of the present invention and method and hybrid vehicle; the engine parameter, the parameter of electric machine and/or the battery parameter that by hybrid power control module basis, collect; control large electric motor starting and switch to the small machine startup; solved cold start-up under the low temperature environment existed in the prior art and may cause the problem to motor and battery infringement, while having realized the low temperature environment cold start-up to the protection of dynamo battery etc.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The physical construction schematic diagram of the cold start of hybrid electric vehicle control system that Fig. 1 provides for the embodiment of the present invention;
The electrical structure schematic diagram of the cold start of hybrid electric vehicle control system that Fig. 2 provides for the embodiment of the present invention;
The principle of work diagram of circuit of the cold start of hybrid electric vehicle control system that Fig. 3 provides for the embodiment of the present invention;
The schematic flow sheet of the cold start of hybrid electric vehicle control method that Fig. 4 provides for the embodiment of the present invention.
Description of reference numerals:
11-the first motor; The 12-driving engine; The 13-change speed gear box;
The 14-engine management module; The 15-battery; The 16-battery management module;
The 17-motor control module; 18-hybrid power control module; The 19-inverter.
The specific embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
Main technical schemes of the present invention is; in the cold-start control system of hybrid vehicle; utilize the hybrid power control module; the parameters such as engine parameter, the parameter of electric machine and/or battery that collect are analyzed; and control switching according to above-mentioned parameter and start the first motor or the second motor to drive described engine starting; the power of described the second motor is less than the power of described the first motor; thereby realized under low temperature environment the protection of the first motor and battery has effectively been avoided to the infringement to parts such as dynamo batteries.
Below by the drawings and specific embodiments, technical scheme of the present invention is described in further detail.
Embodiment mono-
The physical construction schematic diagram of the cold start of hybrid electric vehicle control system that Fig. 1 provides for the embodiment of the present invention, the electrical structure schematic diagram of the cold start of hybrid electric vehicle control system that Fig. 2 provides for the embodiment of the present invention.
Physical construction shown in Figure 1, can comprise driving engine, the first motor 11 and the second motor in hybrid vehicle, wherein, the power of the first motor 11 is larger, can be about 10～15KW, and the power of the second motor is less.The first motor 11 is arranged between driving engine 12 and change speed gear box 13.The bent axle of driving engine 12 is connected with the rotor of the first motor 11, and the other end of the first motor 11 rotors is connected with the input shaft of change speed gear box 13; Stator one end of the first motor 11 is connected with the end face of driving engine 12, and the other end is connected with the housing of change speed gear box 13.
Electrical structure shown in Figure 2, the cold start of hybrid electric vehicle control system of the present embodiment comprises engine management module (Engine Management System, be called for short: EMS) 14, battery 15, battery management module (Battery Management System, be called for short: BMS) (Motor Control Unit is called for short: MCU) 17 and hybrid power control module 18 for the 16, first motor 11, motor control module.Battery management module 16 is connected with battery 15, for gathering the correlation behavior parameter of battery 15; Motor control module 17 is connected with the first motor 11, for gathering the correlation behavior parameter of the first motor 11.
Wherein, hybrid power control module 18 is core control parts of whole hybrid vehicle, it can carry out data exchange by car load CAN communication and engine management module 14, battery management module 16 and motor control module 17, and can be by the CAN communication to above-mentioned three's difference sending controling instruction.Concrete, hybrid power control module 18 can be connected with engine management module 14 by the CAN communication, obtain driving engine correlation behavior parameter, as engine speed, engine torque etc., and can send control command to engine management module 14 by the CAN communication, as adjusted engine torque etc.Hybrid power control module 18 also can be connected with battery management module 16 by the CAN communication, obtain battery correlation behavior parameter, as battery temperature, battery charge state etc., and can send control command to battery management module 16 by the CAN communication, as control its positive and negative terminal relay adhesive etc.Hybrid power control module 18 also is connected with motor control module 17 by the CAN communication, obtain motor correlation behavior parameter, as motor speed, Motor torque etc., and can send control command to motor control module 17 by the CAN communication, change between different mode etc. as controlled motor.
Further, battery 15 can provide propulsion source to the first motor 11 by inverter 19.Inverter 19 is playing the effect of changing between interchange and direct current between the first motor 11 and battery 15.When battery 15 provides driving to the first motor 11, inverter 19 can be converted to the direct current (DC) at battery 15 two ends the required three plase alternating current of the first motor 11.In start-up course, battery 15 can be the first motor 11 driver output power resources according to oneself state to greatest extent.
Below describe the principle of work of the cold start of hybrid electric vehicle control system of the present embodiment in detail, can be referring to Fig. 3, the principle of work diagram of circuit of the cold start of hybrid electric vehicle control system that Fig. 3 provides for the embodiment of the present invention.The working process of this cold-start control system is as follows:
Concrete, after chaufeur is screwed to the ON shelves by key, hybrid power control module 18 can start to gather the detection information of engine management module 14, battery management module 16 and motor control module 17.Wherein, can obtain engine coolant temperature from engine management module 14; Obtain battery temperature from battery management module 16; Obtain the whether good information of the first motor 11 states from motor control module 17, the information whether this state is good can learn whether the first motor 11 breaks down by the historical job record of the first motor 11, and can collect the first motor 11 torque parameter from motor control module 17.
Afterwards, hybrid power control module 18 can be processed parameter obtained above.For example, it comprises the first control unit, and this first control unit can obtain according to engine coolant temperature the size of engine resistance torque; Further, hybrid power control module 18 can also comprise the second control unit, this second control unit can be on the basis of considering the battery self character, estimate the default run up time that obtains driving engine according to battery temperature, for example, when battery temperature, for-20 while spending, can preset run up time is 5 seconds; Can also be on the basis of Motor torque parameter, the impact of considering other factors obtains motor nominal torque parameter after it is proofreaied and correct.
Then, the first control unit of hybrid power control module 18 can judge whether motor has the ability to overcome the engine resistance torque under the present engine cooling-liquid temperature and take which kind of Starting mode.Concrete, hybrid power control module 18 can compare engine resistance torque and motor nominal torque, if engine resistance torque is greater than the motor nominal torque, mean that motor does not meet the drive condition, can not overcome current engine resistance torque, now, hybrid power control module 18 can be controlled the second electric motor starting pattern that enters, concrete, for example hybrid power control module 18 can be notified motor control module 17, controls the first electric motor starting pattern by motor control module 17 and switches to the second electric motor starting pattern.If engine resistance torque is less than the motor nominal torque, mean that motor meets the drive condition, can overcome current engine resistance torque, now, can enter the first electric motor starting pattern.
Further, in the start-up course of motor, hybrid power control module 18 can obtain engine speed parameter by engine management module 14, judges whether driving engine reaches stable idling speed; If reach stable idling mode, can control motor and exit start-up mode, if do not reach stable idling mode, can control motor and keep start-up mode.In addition, the second control unit of hybrid power control module 18 can also be monitored the run up time of driving engine, and run up time and the above-mentioned default run up time obtained according to battery temperature are compared.If be greater than default run up time run up time, and driving engine for the consideration to battery and electric motor protecting, can be converted to the second electric motor starting by the startup of the first motor 11 while not starting yet.
In addition; in start-up course, the 3rd control unit of hybrid power control module 18 can also continue to monitor the state of driving engine, battery, motor, and purpose is in the process of utilizing the first motor 11 start the engines; in the service life of protection battery and motor, avoid it to be damaged.Concrete, the 3rd control unit of hybrid power control module 18 can be monitored respectively following parameter or the state of driving engine and battery:
Battery need to be monitored following parameter, and whether battery temperature, battery discharge power, battery be in coupled condition and battery charge state.Wherein, in the present embodiment, can adopt Ni-MH battery, this kind of battery is more responsive to temperature, and when temperature traverse, discharge power changes greatly.Can be according to the run up time of the default motor of battery temperature, with the protection battery.Battery discharge power during lower than a certain threshold value battery will no longer discharge, avoid electric discharge excessively to cause the injury of battery irrecoverability.Battery management module 16 can the Real-Time Monitoring battery status information and send to hybrid power control module 18.Battery charge state is during lower than a certain threshold value, and hybrid power control module 18 can send message and to battery management module 16, it be cut off to connect.
Driving engine need to be monitored following parameter, engine coolant temperature, engine resistance torque and engine speed.Wherein, if engine coolant temperature during lower than a certain threshold value, hybrid power control module 18 will exit the electric motor starting pattern.Hybrid power control module 18 can judge according to the temperature of refrigerant fluid the size of engine resistance torque, and assesses motor according to battery, motor status at this moment and whether have the ability to drag driving engine to the motor rotating speed of target.Engine speed is also the parameter that needs monitoring, because probably occur in start-up course that engine resistance torque moment uprushes, engine speed probably occurs that the appearance that drops to zero this situation of situation is easy to cause driving engine to flood cylinder so, and this allows anything but to driving engine.
Motor need to be monitored following parameter, and motor status and motor drag the time.Wherein, before startup and in start-up course, must guarantee that motor operates in unfaulty conditions by the Real-Time Monitoring motor status.Take the different time that drags under different ambient temperatures, if motor starts successfully keeps stablizing idling mode setting in advance in run up time, if motor starts unsuccessfully the car load control unit will be switched to the second electric motor starting state at once in setting in advance cranking time so.
Wherein, above-mentioned hybrid power control module can, when one monitors the enabled instruction of driving engine, be controlled and start described the first motor; Then carry out each above-mentioned testing process, when reaching switching condition, control switching and start the second motor to drive engine starting.Perhaps, at first the hybrid power control module also can carry out testing process, then selects the first motor or the second electric motor starting.
The cold start of hybrid electric vehicle control system of the present embodiment; the engine parameter, the parameter of electric machine and/or the battery parameter that by hybrid power control module basis, collect; control large electric motor starting and switch to the small machine startup; solved cold start-up under the low temperature environment existed in the prior art and may cause large motor and be the problem of the battery infringement of this large motor power supply, while having realized the low temperature environment cold start-up to the protection of dynamo battery etc.
Embodiment bis-
The schematic flow sheet of the cold start of hybrid electric vehicle control method that Fig. 4 provides for the embodiment of the present invention, the control method of the present embodiment only is briefly described, and the process of concrete control method can be referring to the explanation of in embodiment mono-, the working process of cold start of hybrid electric vehicle control system being done.As shown in Figure 4, the method can comprise the following steps:
Concrete, described engine parameter can comprise engine coolant temperature, and the parameter of electric machine is that the large motor that power is larger is the parameter of the first motor, can comprise Motor torque, and battery parameter can comprise battery temperature.In addition, battery can provide power driven for described the first motor by inverter, and described inverter can be converted to for the direct current (DC) by described battery the required alternating current of described the first motor.
Concrete, described engine management module, motor control module and battery management module can be set up the CAN communication with the hybrid power control module and be connected, and respectively described engine parameter, the parameter of electric machine and battery parameter are transferred to the hybrid power control module by the CAN communication modes.
Concrete, the hybrid power control module can obtain engine resistance torque according to described engine coolant temperature, further can obtain default run up time according to described battery temperature.And more described engine resistance torque and Motor torque, if described engine resistance torque is greater than Motor torque, enter the second electric motor starting; If described engine resistance torque is less than Motor torque, adopt the first electric motor starting.In the process of described employing electric motor starting, whether the time that drags that the hybrid power control module can be monitored described the first motor is greater than described default run up time; If proceed to the second electric motor starting; Otherwise, continue the first electric motor starting pattern.
In addition, further, consider the factor of battery and motor safety, described hybrid power control module can also be monitored battery discharge power, battery charge state and engine speed etc., and, control and enter the second electric motor starting during lower than setting threshold separately at described battery discharge power, battery charge state or engine speed.
The cold start of hybrid electric vehicle control method of the present embodiment, by adopting heavy-duty motor drive system start the engine, start-up course engine speed and moment of torsion have been improved, shortened the engine starting time, improved to a great extent that the startup noise is large, economy and the problem such as emission performance is poor; The engine parameter, the parameter of electric machine and/or the battery parameter that by hybrid power control module basis, collect; control large electric motor starting and switch to the small machine startup; solved cold start-up under the low temperature environment existed in the prior art and may cause the problem to motor and battery infringement, while having realized the low temperature environment cold start-up to the protection of dynamo battery etc.
One of ordinary skill in the art will appreciate that: realize that the hardware that all or part of step of said method embodiment can be relevant by programmed instruction completes, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Embodiment tri-
The embodiment of the present invention also provides a kind of hybrid vehicle, and this automobile can comprise driving engine, the first motor, the second motor and battery.Wherein, battery is connected to be powered with the first motor; The power of the second motor is less than the power of the first motor.Described the first motor is connected with described driving engine respectively with the second motor, for driving described engine starting.
This hybrid vehicle can also comprise the described cold start of hybrid electric vehicle control system of embodiment mono-.This cold-start control system can collect engine parameter, the parameter of electric machine and/or battery parameter etc. and be analyzed, and according to above-mentioned parameter power ratio control under low temperature environment less the second motor in motoring condition to drive described engine starting.Concrete mode can be described referring to embodiment mono-and embodiment bis-.
The hybrid vehicle of the present embodiment, started by adopting above-mentioned cold-start control system, can realize under low temperature environment the motor larger to power and the protection of battery, effectively avoided the infringement to parts such as dynamo batteries.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: its technical scheme that still can put down in writing aforementioned each embodiment is modified, or part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (11)
1. a cold start of hybrid electric vehicle control system, is characterized in that, comprising:
Engine management module, for gathering engine parameter;
Motor control module, for gathering the parameter of electric machine of the first motor;
Battery management module, for gathering battery parameter;
The hybrid power control module, with described engine management module, battery management module and motor control module, be connected respectively, be used for according to described engine parameter, the parameter of electric machine and/or battery parameter, control switching startup the first motor or the second motor to drive described engine starting, the power of described the second motor is less than the power of described the first motor;
Described engine parameter is engine coolant temperature; The described parameter of electric machine is Motor torque;
Described hybrid power control module comprises the first control unit, described the first control unit is connected with motor control module with described engine management module respectively, for according to described engine coolant temperature, obtaining engine resistance torque, and obtain the motor nominal torque according to described Motor torque; When described engine resistance torque is greater than described motor nominal torque, controls and start described the second motor to drive described engine starting.
2. cold start of hybrid electric vehicle control system according to claim 1, is characterized in that, the run up time that described engine parameter is described driving engine, described battery parameter is battery temperature;
Described hybrid power control module comprises the second control unit, described the second control unit is connected with battery management module with described engine management module respectively, for obtain the default run up time of driving engine according to described battery temperature, and, when be greater than described default run up time the run up time of described driving engine, control and start described the second motor to drive described engine starting.
3. cold start of hybrid electric vehicle control system according to claim 2, it is characterized in that, described hybrid power control module comprises the 3rd control unit, described the 3rd control unit is connected with battery management module with described engine management module respectively, for monitoring battery discharge power, battery charge state and engine speed, and, control and start described the second motor to drive described engine starting during lower than setting threshold separately at described battery discharge power, battery charge state or engine speed.
4. cold start of hybrid electric vehicle control system according to claim 1, is characterized in that, described battery is connected with described the first motor by inverter.
5. cold start of hybrid electric vehicle control system according to claim 1, is characterized in that, described battery is Ni-MH battery.
6. a hybrid vehicle, comprise driving engine, the first motor, the second motor and battery; Described battery is connected to be powered with described the first motor; The power of described the second motor is less than the power of described the first motor, it is characterized in that,
Described the first motor is connected with described driving engine respectively with the second motor, and for driving described engine starting, described hybrid vehicle also comprises the arbitrary described cold start of hybrid electric vehicle control system of claim 1～5.
7. a cold start of hybrid electric vehicle control method, is characterized in that, comprising:
Step 1, engine management module gather engine parameter, and motor control module gathers the parameter of electric machine of the first motor, and battery management module gathers battery parameter;
Step 2, described engine management module, motor control module and battery management module transfer to the hybrid power control module by described engine parameter, the parameter of electric machine and battery parameter respectively;
Step 3, described hybrid power control module are according to described engine parameter, the parameter of electric machine and/or battery parameter, control switching described the first motor of startup or the second motor to drive described engine starting, the power of described the second motor is less than the power of described the first motor;
Described engine parameter is engine coolant temperature; The described parameter of electric machine is Motor torque;
Described step 3 comprises, described hybrid power control module obtains engine resistance torque according to described engine coolant temperature, and obtains the motor nominal torque according to described Motor torque; When described engine resistance torque is greater than described motor nominal torque, controls and start described the second motor to drive described engine starting.
8. cold start of hybrid electric vehicle control method according to claim 7, is characterized in that, described step 2 is specially:
Described engine management module and motor control module transfer to the hybrid power control module by described engine coolant temperature and Motor torque respectively by the CAN communication modes.
9. according to the described cold start of hybrid electric vehicle control method of claim 7 or 8, it is characterized in that, the run up time that described engine parameter is described driving engine, described battery parameter is battery temperature:
Described step 3 comprises: described hybrid power control module obtains default run up time according to described battery temperature, and, when be greater than described default run up time the run up time of described driving engine, control and start described the second motor to drive described engine starting.
10. cold start of hybrid electric vehicle control method according to claim 7, is characterized in that, also comprises:
Described battery provides power driven by inverter for described the first motor, and described inverter is for being converted to the required alternating current of described the first motor by the direct current (DC) of described battery.
11. cold start of hybrid electric vehicle control method according to claim 7, is characterized in that, also comprises:
The described monitoring of hybrid power control module battery discharge power, battery charge state and engine speed, and, control and start described the second motor to drive described engine starting during lower than setting threshold separately at described battery discharge power, battery charge state or engine speed.
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| US9022002B2 (en) * | 2012-06-14 | 2015-05-05 | GM Global Technology Operations LLC | Method of cold starting an internal combustion engine in hybrid applications |
| CN103674363A (en) * | 2012-09-18 | 2014-03-26 | 重庆长安汽车股份有限公司 | Test system for low-temperature starting resisting moment of engine |
| CN103223943B (en) * | 2013-04-25 | 2017-12-05 | 同济大学 | Modularization whole-control system for motor vehicle driven by mixed power |
| CN107559119B (en) * | 2017-08-08 | 2019-03-01 | 清华大学 | The control system and vehicle of engine low-temperature starting-up |
| CN107829860B (en) * | 2017-11-01 | 2019-11-01 | 潍柴动力股份有限公司 | A kind of engine start protection system and method |
| CN112810600B (en) * | 2019-11-15 | 2023-12-12 | 比亚迪股份有限公司 | Power control method and system, vehicle and storage medium |
| CN111881419B (en) * | 2020-07-28 | 2023-07-25 | 重庆长安汽车股份有限公司 | Vehicle cold start evaluation method |
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| KR20090062589A (en) * | 2007-12-13 | 2009-06-17 | 현대자동차주식회사 | Method for controlling cold starting of hev |
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| CN101122262A (en) * | 2007-09-03 | 2008-02-13 | 奇瑞汽车有限公司 | Hybrid power automobile motor warm-up control method |
| CN101121406A (en) * | 2007-09-03 | 2008-02-13 | 奇瑞汽车有限公司 | Pure electric driving control method for mixed power automobile |
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