CN102991496A - Energy recycling control method and system used for hybrid electric vehicle - Google Patents

Energy recycling control method and system used for hybrid electric vehicle Download PDF

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Publication number
CN102991496A
CN102991496A CN2011102743039A CN201110274303A CN102991496A CN 102991496 A CN102991496 A CN 102991496A CN 2011102743039 A CN2011102743039 A CN 2011102743039A CN 201110274303 A CN201110274303 A CN 201110274303A CN 102991496 A CN102991496 A CN 102991496A
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China
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motor
engine
management
hybrid vehicle
battery
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CN2011102743039A
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Chinese (zh)
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CN102991496B (en
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田斌
秦兴权
胡凡
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北汽福田汽车股份有限公司
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/62Hybrid vehicles

Abstract

The invention provides an energy recycling control method and system used for a hybrid electric vehicle. The method comprises the following steps of detecting states of an engine management system (EMS), a motor control unit (MCU) and a battery management system (BMS) of the hybrid electric vehicle, when the states of the EMS, MCU and the BMS meet a preset condition, obtaining a throttle pedal position, a brake pedal position, a battery SOC (system on a chip) and a motor rated torque of the hybrid electric vehicle; calculating an electric braking torque according to the throttle pedal position, brake pedal position, battery SOC and the motor rated torque of the hybrid electric vehicle; identifying whether the motor adopts electric braking to perform energy recycling according to an ABS (anti-lock braking system) state; if the motor adopts the electric braking to perform energy recycling, performing braking control on the motor by the electric braking torque. The embodiment provided by the invention can convert the kinetic energy into electric energy, thereby realizing recycling of electric braking energy.

Description

The energy recycling and control method and the system that are used for hybrid vehicle
Technical field
The present invention relates to the Development of HEV Technology field, relate in particular to a kind of energy reclaiming method for hybrid vehicle and system.
Background technology
In recent years, in order significantly to improve Vehicle Economy and to reduce discharging, energy-conservation growing with the 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: hybrid vehicle energy sources scope is wide, economic benefit is high, can realize energy supply when car retardation is braked by energy-recuperation system.When car retardation is braked, motor is switched to power generation mode, motor is electric energy with kinetic transformation and stores in the battery in auxiliary braking, to improve the energy utilization efficiency of car load, increases the travelled distance of car load.Hybrid vehicle has improved the fuel consumption and emission problem to a certain extent.At present, the subject matter that hybrid vehicle faces is the problem that multiple-energy-source is coordinated control, how to utilize efficiently motor to become the gordian technique of hybrid power system after adding motor driven systems.
Summary of the invention
The present invention is intended to solve at least one of technical matters that exists in the prior art.
For this reason, one aspect of the present invention has proposed a kind of energy recycling and control method for hybrid vehicle, may further comprise the steps:
Detect engine management system EMS, the motor management systems MCU of hybrid vehicle and the state of battery management system BMS; When the state of described engine management system EMS, motor management systems MCU and battery management system BMS satisfy pre-conditioned after, obtain accelerator pedal position, brake pedal position, battery SOC, coefficient of road adhesion and the motor nominal torque of described hybrid vehicle.When described engine coolant temperature is lower than corresponding threshold value, judge that the state of described engine management system EMS satisfies pre-conditioned; When described battery temperature and battery charge power are lower than the two corresponding threshold value, judge that the state of described battery management system BMS satisfies pre-conditioned; When described motor operates in unfaulty conditions, judge that the state of described motor management systems MCU satisfies pre-conditioned.
The energy recycling and control method that should be used for hybrid vehicle also comprises: accelerator pedal position, brake pedal position, battery SOC, coefficient of road adhesion and motor nominal torque according to described hybrid vehicle calculate the electric braking moment of torsion; Judge according to the ABS state whether motor adopts electric braking to carry out energy and reclaim; With, if judge that described motor adopts electric braking to carry out energy and reclaims, then with described electric braking moment of torsion described motor is braked control.
The embodiment of the invention detects the state of engine management system EMS, battery management system BMS and motor management systems MCU by the hybrid power control unit, in the torque distribution of coordinating in the suitable situation of state between traditional braking power and the motor braking power, kinetic transformation is become electric energy, realize the recovery of electric braking energy, solve kinetic energy and electric energy in the hybrid vehicle and coordinated the problem of control, thereby both realized the efficient utilization of motor, and also can guarantee car load traveling comfort and the economy of energy of hybrid vehicle when energy reclaims.
In addition, the embodiment of the invention can also have following technical characterictic:
In one embodiment of the invention, described engine coolant temperature is determined described engine resistance torque and described engine speed.When if described engine cooling temperature is higher than a certain threshold value, the car load control unit will withdraw from motor electric braking pattern, is not damaged with the protection driving engine.
When described anti-skid brake system ABS starts, do not adopt electric braking to carry out energy and reclaim.
In one embodiment of the invention, when described motor adopted electric braking to carry out the energy recovery, control engine stopped oil spout, to improve the economy of fuel oil.
In one embodiment of the invention, storage battery can provide propulsion source to described motor by inverter.Described inverter is playing the effect of changing between interchange and the direct current between described motor and the described storage battery.When described motor provided driving, described inverter was converted to the required three plase alternating current of motor with the direct current (DC) at described storage battery two ends.
In a preferred embodiment of the invention, in the energy removal process, the hybrid power control unit is still monitored the state of driving engine, battery, motor.
The present invention has also proposed a kind of energy recovery control system for hybrid vehicle on the other hand, comprises engine management system EMS, is used for the engine condition of described hybrid vehicle is detected and described driving engine is controlled; Motor management systems MCU is used for the motor status of described hybrid vehicle is detected and described motor is controlled; Battery management system BMS is used for the battery status of described hybrid vehicle is detected; The hybrid power control unit, described hybrid power control unit respectively with described engine management system EMS, described motor management systems MCU links to each other with described battery management system BMS, described hybrid power control unit is for detection of the engine management system EMS of hybrid vehicle, the state of motor management systems MCU and battery management system BMS, and when judging described engine management system EMS, the state of motor management systems MCU and battery management system BMS satisfy pre-conditioned after, obtain the accelerator pedal position of described hybrid vehicle, brake pedal position, battery SOC, coefficient of road adhesion and motor nominal torque, and according to the accelerator pedal position of described hybrid vehicle, brake pedal position, battery SOC, coefficient of road adhesion and motor nominal torque calculate the electric braking moment of torsion, with after judging that employing motor employing electric braking carries out the energy recovery, with described electric braking moment of torsion described motor is braked control.
The present invention is by providing the hybrid power control unit, with engine management system EMS, battery management system BMS links to each other with motor management systems MCU, detect engine management system EMS by the hybrid power control unit, the state of battery management system BMS and motor management systems MCU, in the torque distribution of coordinating in the suitable situation of state between traditional braking power and the motor braking power, kinetic transformation is become electric energy, realize the recovery of electric braking energy, solve kinetic energy and electric energy in the hybrid vehicle and coordinated the problem of control, thereby both realized the efficient utilization of motor, and also can guarantee car load traveling comfort and the economy of energy of hybrid vehicle when energy reclaims.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the mechanical schematic diagram of the energy recovery control system that is used for hybrid vehicle of the embodiment of the invention;
Fig. 2 is the electrical schematic of the energy recovery control system that is used for hybrid vehicle of the embodiment of the invention;
Fig. 3 is the concrete control flow chart of the embodiment of the invention.
The specific embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein identical or similar label represents identical or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, unless otherwise prescribed and limit, need to prove that term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly to link to each other, and also can indirectly link to each other by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
As shown in Figure 1, be the mechanical schematic diagram of the hybrid vehicle braking energy recovery control system of the embodiment of the invention.Motor 1 is between driving engine 2 and change speed gear box 3, the bent axle of driving engine 2 links to each other with the rotor of motor 1, the rotor other end of motor 1 links to each other with the input shaft of change speed gear box 3, and stator one end of motor 1 links to each other with driving engine 2 end faces, and the other end links to each other with the housing of change speed gear box 3.
As shown in Figure 2, be the electrical schematic of hybrid vehicle braking energy recovery control system.This system comprises engine management system EMS10, motor management systems MCU11, hybrid power control unit 12 and battery management system BMS13.Hybrid power control unit 12 links to each other with engine management system EMS10 by the CAN bus, thereby can obtain the correlation behavior parameter of driving engine 2, such as engine speed, engine torque etc., and can send control command to EMS10 by the CAN bus, as adjusting engine torque etc.
Hybrid power control unit 12 links to each other with battery management system BMS13 by the CAN bus, can obtain battery correlation behavior parameter, such as battery temperature, battery charge state etc., and can send control command to BMS13 by the CAN bus, as controlling positive and negative terminal relay adhesive etc.In addition, hybrid power control unit 12 also can link to each other with motor management systems MCU11 by the CAN bus, thereby can obtain motor correlation behavior parameter, such as motor speed, Motor torque etc., and can send control command to MCU11 by the CAN bus, as changing between control motor different mode etc.
When the state of judging engine management system EMS10, motor management systems MCU11 and battery management system BMS13 satisfy pre-conditioned after, obtain accelerator pedal position, brake pedal position, battery SOC and the motor nominal torque of hybrid vehicle, and calculate the electric braking moment of torsion according to accelerator pedal position, brake pedal position, battery SOC, coefficient of road adhesion and the motor nominal torque of hybrid vehicle.And after judging that motor employing electric braking carries out the energy recovery, with the electric braking moment of torsion motor is braked control.
In one embodiment of the invention, the state of engine management system EMS10 can comprise engine coolant temperature, engine resistance torque and engine speed etc., wherein, determines engine resistance torque and engine speed by engine coolant temperature.Particularly, when engine coolant temperature is lower than corresponding threshold value, judge that the state of engine management system EMS10 satisfies pre-conditioned.
In one embodiment of the invention, the state of battery management system BMS13 comprises battery temperature and battery charge power, and when battery temperature and battery charge power are lower than the two corresponding threshold value, judge that the state of battery management system BMS13 satisfies pre-conditioned.
In one embodiment of the invention, the state of motor management systems MCU11 comprises the running state of motor, when motor operates in unfaulty conditions, judges that the state of motor management systems MCU11 satisfies pre-conditioned.
As shown in Figure 3, be the concrete control flow chart of the embodiment of the invention.After key is screwed to the ON shelves, hybrid power control unit 12 detection hybrid vehicles detect the information of each subsystem, such as the engine coolant temperature among the engine management system EMS10, engine speed, motor operating state among the motor management systems MCU11, and the battery temperature among the battery management system BMS13 and battery charge power etc., and each status information tentatively judged.
In one embodiment of the invention, hybrid vehicle can adopt the more sensitive Ni-MH battery of temperature, and the charge power of battery changed greatly when battery temperature changed, and therefore need to monitor battery temperature and battery charge power.In the braking energy removal process battery can instantaneous large-current charging, if overcharged then can cause the injury of battery irrecoverability, if battery will not recharge when therefore being higher than a certain threshold value for protection battery battery charge power.When if engine coolant temperature is higher than a certain threshold value, the car load control unit will withdraw from motor electric braking pattern.Probably occur engine resistance torque in the braking procedure and change, so corresponding engine speed will change, and can cut off oil spout in the rotating speed falling process to improve driving engine economy and discharging.
When hybrid power control unit 12 judge the state of engine management system EMS10, motor management systems MCU11 and battery management system BMS13 satisfy pre-conditioned after, obtain accelerator pedal position, brake pedal position, battery SOC and the motor nominal torque of hybrid vehicle.Then, hybrid power control unit 12 is judged the moment of torsion that braking energy reclaims according to above-mentioned parameter, and calculates the electric braking moment of torsion.Different ambient temperatures, accelerator pedal position, brake pedal position, coefficient of road adhesion, battery status, engine condition, ABS take different electric braking moments of torsion, thereby guarantee that car load is safe and reliable to operation in the energy removal process.(specifically how to calculate and to provide? many thanks)
When anti-skid brake system ABS does not start, adopt electric braking to carry out energy and reclaim.In one embodiment of the invention, when anti-skid brake system ABS starts, moment of torsion is reclaimed in the braking that cancellation calculates, do not adopt electric braking to carry out energy and reclaim.
In one embodiment of the invention, when motor adopted electric braking to carry out the energy recovery, control engine stopped oil spout.If judge that motor adopts electric braking to carry out energy and reclaims, then with the electric braking moment of torsion motor braked control.
In one embodiment of the invention, storage battery can provide propulsion source to described motor by inverter.Inverter is playing the effect of changing between interchange and the direct current between described motor and the described storage battery.When described motor provided driving, described inverter was converted to the required three plase alternating current of motor with the direct current (DC) at described storage battery two ends.
In a preferred embodiment of the invention, in the energy removal process, hybrid power control unit 12 still can be monitored the state of driving engine, battery, motor.The state of battery management system BMS13 Real-Time Monitoring battery also will send to the car load control unit to the battery important information of collecting.In the electric braking process, if when battery charge state is higher than a certain threshold value, the car load control unit will send message makes it cut off connection to battery management system BMS13.
The present invention is by providing hybrid power control unit 12, with engine management system EMS10, battery management system MCU11 links to each other with motor management systems BMS13, detect engine management system EMS10 by the hybrid power control unit, the state of battery management system BMS13 and motor management systems MCU11, in the torque distribution of coordinating in the suitable situation of state between traditional braking power and the motor braking power, kinetic transformation is become electric energy, realize the recovery of electric braking energy, kinetic energy and electric energy are coordinated the problem of control in the solution hybrid vehicle, realize the efficient utilization of motor, guarantee car load traveling comfort and the economy of energy of hybrid vehicle when energy reclaims.Simultaneously, in the energy removal process, the hybrid power control unit still can be monitored the state of driving engine, battery, motor, and the important information of collecting is sent to the car load control unit, guarantees that car load is safe and reliable to operation in the energy removal process.
In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiment in the situation that does not break away from principle of the present invention and aim, scope of the present invention is limited by claim and equivalent thereof.

Claims (15)

1. an energy recycling and control method that is used for hybrid vehicle is characterized in that, may further comprise the steps:
Detect engine management system EMS, the motor management systems MCU of hybrid vehicle and the state of battery management system BMS;
When the state of described engine management system EMS, motor management systems MCU and battery management system BMS satisfy pre-conditioned after, obtain accelerator pedal position, brake pedal position, battery SOC, coefficient of road adhesion and the motor nominal torque of described hybrid vehicle;
Accelerator pedal position, brake pedal position, battery SOC, coefficient of road adhesion and motor nominal torque according to described hybrid vehicle calculate the electric braking moment of torsion;
Judge according to the ABS state whether motor adopts electric braking to carry out energy and reclaim; With
If described motor adopts electric braking to carry out energy and reclaims, then with described electric braking moment of torsion described motor is braked control.
2. the energy recycling and control method for hybrid vehicle as claimed in claim 1, it is characterized in that, the state of described engine management system EMS comprises engine coolant temperature, engine resistance torque and engine speed, wherein, determine described engine resistance torque and described engine speed by described engine coolant temperature.
3. the energy recycling and control method for hybrid vehicle as claimed in claim 2 is characterized in that, when described engine coolant temperature is lower than corresponding threshold value, judges that the state of described engine management system EMS satisfies pre-conditioned.
4. the energy recycling and control method for hybrid vehicle as claimed in claim 1, it is characterized in that, the state of described battery management system BMS comprises battery temperature and battery charge power, and when described battery temperature and battery charge power are lower than the two corresponding threshold value, judge that the state of described battery management system BMS satisfies pre-conditioned.
5. the energy recycling and control method for hybrid vehicle as claimed in claim 1, it is characterized in that, the state of described motor management systems MCU comprises the running state of motor, when described motor operates in unfaulty conditions, judge that the state of described motor management systems MCU satisfies pre-conditioned.
6. the energy recycling and control method for hybrid vehicle as claimed in claim 1 is characterized in that, also comprises:
When anti-skid brake system ABS starts, do not adopt electric braking to carry out energy and reclaim.
7. the energy recycling and control method for hybrid vehicle as claimed in claim 1 is characterized in that, also comprises:
When described motor adopted electric braking to carry out the energy recovery, control engine stopped oil spout.
8. an energy recovery control system that is used for hybrid vehicle is characterized in that, comprising:
Engine management system EMS is used for the engine condition of described hybrid vehicle is detected and described driving engine is controlled;
Motor management systems MCU is used for the motor status of described hybrid vehicle is detected and described motor is controlled;
Battery management system BMS is used for the battery status of described hybrid vehicle is detected;
The hybrid power control unit, described hybrid power control unit respectively with described engine management system EMS, described motor management systems MCU links to each other with described battery management system BMS, described hybrid power control unit is for detection of the engine management system EMS of hybrid vehicle, the state of motor management systems MCU and battery management system BMS, and when judging described engine management system EMS, the state of motor management systems MCU and battery management system BMS satisfy pre-conditioned after, obtain the accelerator pedal position of described hybrid vehicle, brake pedal position, battery SOC, coefficient of road adhesion and motor nominal torque, and according to the accelerator pedal position of described hybrid vehicle, brake pedal position, battery SOC, coefficient of road adhesion and motor nominal torque calculate the electric braking moment of torsion, with after judging that employing motor employing electric braking carries out the energy recovery, with described electric braking moment of torsion described motor is braked control.
9. the energy recovery control system for hybrid vehicle as claimed in claim 8, it is characterized in that described hybrid power control unit links to each other with described battery management system BMS with described engine management system EMS, described motor management systems MCU by the CAN bus respectively.
10. the energy recovery control system for hybrid vehicle as claimed in claim 8, it is characterized in that, the state of described engine management system EMS comprises engine coolant temperature, engine resistance torque and engine speed, wherein, determine described engine resistance torque and described engine speed by described engine coolant temperature.
11. the energy recycling and control method for hybrid vehicle as claimed in claim 10 is characterized in that, when described engine coolant temperature is lower than corresponding threshold value, judges that the state of described engine management system EMS satisfies pre-conditioned.
12. the energy recovery control system for hybrid vehicle as claimed in claim 8, it is characterized in that, the state of described battery management system BMS comprises battery temperature and battery charge power, and when described battery temperature and battery charge power are lower than the two corresponding threshold value, judge that the state of described battery management system BMS satisfies pre-conditioned.
13. the energy recovery control system for hybrid vehicle as claimed in claim 8, it is characterized in that, the state of described motor management systems MCU comprises the running state of motor, when described motor operates in unfaulty conditions, judge that the state of described motor management systems MCU satisfies pre-conditioned.
14. the energy recovery control system for hybrid vehicle as claimed in claim 8 is characterized in that, when anti-skid brake system ABS started, described hybrid power control unit did not adopt electric braking to carry out energy and reclaims.
15. the energy recycling and control method for hybrid vehicle as claimed in claim 8 is characterized in that, when described motor adopted electric braking to carry out the energy recovery, described hybrid power control unit control engine stopped oil spout.
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