CN105172571A - Driving system and method for hybrid electric vehicle - Google Patents
Driving system and method for hybrid electric vehicle Download PDFInfo
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- CN105172571A CN105172571A CN201510498254.5A CN201510498254A CN105172571A CN 105172571 A CN105172571 A CN 105172571A CN 201510498254 A CN201510498254 A CN 201510498254A CN 105172571 A CN105172571 A CN 105172571A
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Abstract
The invention discloses a driving system for a hybrid electric vehicle. The driving system comprises an engine, a vehicle control unit, a battery management system, a battery pack, a driving motor control unit, a driving motor, a starting clutch control unit, a starting clutch, a starter, an electric oil pump, an automatic transmission control unit and an engine management system. The vehicle control unit is connected with the battery management system, the driving motor control unit, the starting clutch control unit, the automatic transmission control unit and the engine management system through a CAN bus respectively. The battery management system is connected with the battery pack which is connected with the starter. The battery pack is connected with the driving motor and the electric oil pump through an inverter. By means of the structure, the driving system has the advantages that a power coupling device high in transmission efficiency, low in cost and small in axial size of the driving system is provided; the difficulty in arrangement of front-engine front-drive type hybrid electric vehicle power is effectively overcome; the system adopts the single motor to meet the system requirement, and the cost is lowered.
Description
Technical field
The present invention relates to Development of HEV Technology field, particularly a kind of mixed power automobile driving system and driving method thereof.
Background technology
Severe and the green-house effect of energy shock, environment is the key factor of restriction global evolution, and the new-energy automobile of research energy-saving and environmental protection is one of effective means solved the problem.Hybrid vehicle has taken into account the advantage of combustion engine and pure electric automobile, and having the advantage of low oil consumption, anti-emission carburetor and long travelled distance, is current practicable a kind of scheme.
Mixed power automobile driving system structure mainly contains series connection, series-parallel connection.The feature of cascaded structure be driving engine mechanically with transmission system decoupling zero, driving engine direct drive generator is powered to closed-center system or drive motor, and the shortcoming of cascaded structure is that system effectiveness is low, and dual motors system causes integral vehicle cost high; The feature of hybrid connected structure is that the power of driving engine can realize shunting, and a part is used for car load and drives, and a part is for driving electrical power generators, and the shortcoming of combined hybrid system is that dual motors system causes integral vehicle cost high, and Systematical control is complicated.
At present, mixed power automobile driving system kind is more, substantially can realize the various functions that hybrid vehicle possesses.Such as publication number is: the Chinese patent " hybrid electric drive system and driving method thereof " of CN101417606A, describe the function that a kind of series parallel type drive system and vehicle can realize, this system adopts double-motor, by the dynamic branch of driving engine, realize vehicle electricity generate function under all operating modes; Publication number is: the Chinese patent " for controlling the system and method that in motor vehicle driven by mixed power, power-transfer clutch combines " of CN101456347A, introduce a kind of parallel connection mixed power driving system, this system adopts double-motor, with driving engine and the electrical generator that axle is connected can realize vehicle electricity generate function under all operating modes.Above-mentioned disclosed two sections of patents are all realize electricity generate function by extra electrical generator, and use cost is high.
Summary of the invention
Technical matters to be solved by this invention is, for the deficiencies in the prior art, a kind of mixed power automobile driving system and driving method thereof are provided, to reach following object: propose the dynamic coupling device that a kind of driving efficiency is high, cost is low, drive system axial dimension is little, effectively solve the arrangement difficulty of preposition forerunner's type hybrid electric vehicle power; Native system uses single motor to meet system requirements, reduces costs.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of mixed power automobile driving system, comprises driving engine, entire car controller HCU, battery management system BMS, power brick, drive motor control unit MCU, drive motor, start clutch control unit CCU, start clutch, starter, electric oil pump, Automatic Transmission control unit TCU, engine management system EMS, described entire car controller HCU by CAN respectively with battery management system BMS, drive motor control unit MCU, start clutch control unit CCU, Automatic Transmission control unit TCU, engine management system EMS connects, and described battery management system BMS is connected with power brick, and described power brick is connected with starter, power brick by inverter respectively with drive motor, electric oil pump connects, and described drive motor control unit MCU is connected with described drive motor by described inverter, and described start clutch control unit CCU is connected with start clutch.
Described entire car controller HCU, for according to acceleration pedal signal, brake pedal signal, gear signal, carry out engine torque and start-stop controls, CVT converter speed ratio controls, clutch capacity controls, drive motor drives and power generation torque controls, high-tension battery coupled condition controls;
Described entire car controller HCU, according to electrokinetic cell electricity, controls car load electric-only mode and travels or hybrid mode traveling;
Described power brick is connected with the battery charger with external charge plug.
Described automobile driving system also comprises traditional pony engine, torsional damper, advance reverse clutch, CVT gearshift, CVT housing, main reduction gear, described start clutch and the integrated formation power coupling mechanism of drive motor, torsional damper is contained between driving engine and described power coupling mechanism.
Described power coupling mechanism to be arranged on before CVT in casing.
A driving method for mixed power automobile driving system, described method comprises the following steps:
A) when electrokinetic cell electricity abundance, car load is in electric-only mode, and entire car controller HCU controls start clutch and is in thorough off-state, and car load is driven separately by drive motor;
B) when electrokinetic cell electricity is low, car load enters hybrid mode by electric-only mode, by start clutch, by drive motor pulsation-free, engine starting is entered the state of driving engine and drive motor parallel drive car load;
C) under the serious feed of electrokinetic cell or abnormal condition, entire car controller HCU controls driving engine starting, and driving engine drives car load separately.
In step c, in driving engine starting-up process, start clutch is in sliding state of rubbing.
In step a, the condition that car load enters electric-only mode is: acceleration pedal aperture and rate of change are less than setting value; Battery SOC is greater than 30%; Engine coolant temperature is higher than 50 DEG C; Drive motor rotating speed is less than setting value.
In stepb, car load enters the condition of hybrid mode and is: the speed of a motor vehicle is less than 100km/h; Acceleration pedal aperture and rate of change are greater than setting value; Battery SOC is less than 30%; Motor exports driving power and is less than setting value.
The present invention adopts said structure and method, has the following advantages: 1, propose the dynamic coupling device that a kind of driving efficiency is high, cost is low, drive system axial dimension is little, effectively solves the arrangement difficulty of preposition forerunner's type hybrid electric vehicle power; Native system uses single motor to meet system requirements, reduces costs; 2, system adopts single motor, and realize hybrid vehicle function, integral vehicle cost is low; 3, dynamic coupling device and change speed gear box integrated, start clutch can be integrated with motor, dynamic assembly compact conformation, and axial dimension is little, be convenient to arrange; 4, dynamic total transplantability is good, is convenient to expand to different platform vehicle.Cancel original CVT turbine transformer, continue to use original system hydraulic efficiency pressure system, realize car load starting by start clutch, drive system efficiency is high, good economy performance; By controlling start clutch, can realize starting smooth starting driving engine in pure motor driving function, traveling, regenerating braking energy reclaims function etc.; Driving system structure is relatively simple, full-vehicle control based on information of vehicles, controls CVT converter speed ratio, engine start/stop and output power of motor, realize moving total optimal control, car load economy and emission performance better.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation;
Fig. 1 is system architecture diagram of the present invention;
Fig. 2 is the structural representation of medium power coupling device of the present invention;
In Fig. 1 ~ Fig. 2,1, driving engine; 2, drive motor; 3, start clutch; 4, traditional pony engine; 5, torsional damper; 6, advance reverse clutch; 7, CVT gearshift; 8, CVT housing; 9, main reduction gear.
Detailed description of the invention
A kind of mixed power automobile driving system as shown in Fig. 1 ~ Fig. 2, comprise driving engine 1, entire car controller HCU, battery management system BMS, power brick, drive motor control unit MCU, drive motor 2, start clutch control unit CCU, start clutch 3, starter, electric oil pump, Automatic Transmission control unit TCU, engine management system EMS, entire car controller HCU by CAN respectively with battery management system BMS, drive motor control unit MCU, start clutch control unit CCU, Automatic Transmission control unit TCU, engine management system EMS connects, battery management system BMS is connected with power brick, power brick is connected with starter, power brick by inverter respectively with drive motor 2, electric oil pump connects, drive motor 2 control unit MCU is connected with drive motor 2 by described inverter, start clutch control unit CCU is connected with start clutch 3.Entire car controller HCU, for according to acceleration pedal signal, brake pedal signal, gear signal, carry out engine torque and start-stop controls, CVT converter speed ratio controls, clutch capacity controls, drive motor drives and power generation torque controls, high-tension battery coupled condition controls; Entire car controller HCU, according to electrokinetic cell electricity, controls car load electric-only mode and travels or hybrid mode traveling.
Power brick is connected with the battery charger with external charge plug.Automobile driving system also comprises traditional pony engine 4, torsional damper 5, advance reverse clutch 6, CVT gearshift 7, CVT housing 8, main reduction gear 9, start clutch 3 and the integrated formation power coupling mechanism of drive motor 2, torsional damper 5 is contained between driving engine 1 and power coupling mechanism.
Power coupling mechanism to be arranged on before CVT in casing.Power coupling is positioned at original CVT turbine transformer position.Under the prerequisite not changing CVT housing 8 size, power coupling is integrated with drive motor 2 and start clutch 3.Closely, integrated level is high for dynamic assembly structure, meets car load front deck arrangement space demand.Drive system of the present invention adopts single motor mechanism, and under normal circumstances, in pure motorized motions, driving process, fire an engine, assistive drive and generating of cruising are all completed by this motor.Torsional damper 5 is housed between driving engine and power coupling, remains traditional pony engine 4, for cold start-up and other in particular cases start the engine.Drive motor 2 stator is fixed on CVT housing 8, and rotating speed adopts rotatably supported mode.Start clutch 3 adopts multi-disc wet clutch, can realize accurately controlling driving torque, completes start the engine function in driving engine starting and driving process.The mode that hydraulic efficiency pressure system adopts mechanical-hydraulic oil pump and electric hydraulic oil pump to combine, in the car load starting stage, vehicle control unit controls electric oil pump works, and sets up CVT oil pressure, realizes vehicle gentle start function.CVT retains original advance reverse clutch structure, realizes car load advance, reverse gear function.
Entire car controller HCU, according to electrokinetic cell electricity, determines the different driving mode of car load, by the adhesive of CCU control clutch and disconnection, thus realizes drive motor 2 and drives function separately with driving engine 1 parallel drive, drive motor 2.In the process of moving, driving engine 1 is needed to participate in driving if entire car controller HCU detects, entire car controller HCU will control start clutch 3 binding capacity, realize smooth starting driving engine 1 in vehicle processes, driving engine 1 be started in specific time and meets chaufeur to drive function request.
A driving method for mixed power automobile driving system, method comprises the following steps:
A) when electrokinetic cell electricity abundance, car load is in electric-only mode, and entire car controller HCU controls start clutch and is in thorough off-state, and car load is driven separately by drive motor; The condition that car load enters electric-only mode is: acceleration pedal aperture and rate of change are less than setting value; Battery SOC is greater than 30%; Engine coolant temperature is higher than 50 DEG C; Drive motor rotating speed is less than setting value.
B) when electrokinetic cell electricity is low, car load enters hybrid mode by electric-only mode, by start clutch, by drive motor pulsation-free, engine starting is entered the state of driving engine and drive motor parallel drive car load; The condition that car load enters hybrid mode is: the speed of a motor vehicle is less than 100km/h; Acceleration pedal aperture and rate of change are greater than setting value; Battery SOC is less than 30%; Motor exports driving power and is less than setting value.
C) under the serious feed of electrokinetic cell or abnormal condition, entire car controller HCU controls driving engine starting, and driving engine drives car load separately.In driving engine starting-up process, start clutch is in sliding state of rubbing, and the continuous cunning possessing certain hour is rubbed capacity, thus guarantees driving and the reliability of car load.
Table 1 is the state of the corresponding power-transfer clutch of hybrid electric drive system difference in functionality, and wherein start clutch 3 represents with C1, and advance reverse clutch C2 represents, as follows:
| Driving functions | C1 state | C2 state | Remarks |
| Stop and generate electricity | Engage | Disconnect | |
| Idle stop | Disconnect | Disconnect | |
| Electric-only mode | Disconnect | Engage | |
| Fire an engine in driving process | Engage | Engage | C1 has sliding process of rubbing |
| Driving engine and motor parallel drive | Engage | Engage | |
| Regenerating braking energy reclaims | Disconnect | Engage | |
| Driving engine is started to walk | Slide and rub | Engage | |
| Driving engine drives separately | Engage | Engage |
Table 1
In the present system, the various function of car load mainly controls each parts collaborative work by entire car controller HCU and completes, such as, fire an engine in driving process, entire car controller HCU is according to chaufeur acceleration pedal signal, battery electric quantity signal etc., control start clutch and engage capacity, make the moment of torsion of drive motor can be delivered to engine crankshaft accurately, driving engine 1 is lighted a fire successfully.Then consider the driving of car load, the factors such as the fluctuation of driving engine 1 output torque, control start clutch 3 is entered sliding rubbing by entire car controller HCU, causes the impact on car load driving to absorb torque ripple in driving engine 1 starting process.
The feature of parallel-connection structure is that driving engine and drive motor can realize power coupling, under the operating mode of driving engine economy and emission performance difference, can realize pure motor power and drive.Parallel-connection structure can adopt single motor, and system has the plurality of advantages such as driving efficiency is high, oil-saving effect good, cost of development is low, system complexity is relatively little.The present invention proposes a kind of mixed power automobile driving system.This system primarily of driving engine, drive motor, power coupling, Automatic Transmission (herein for progressive gear transmission, hereinafter referred to as: CVT) and the annex composition such as electric oil pump.Based on the feature of the hybrid electric drive system structure that the present invention proposes, the present invention describes the dynamic coupling device in drive system in detail, and this device integrated level is high, novel in structural design.Severe hybrid power and all whole vehicle functions of plug-in hybrid can be realized.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that method of the present invention is conceived and technical scheme is carried out; or directly apply to other occasion, all within protection scope of the present invention without improving.
Claims (9)
1. a mixed power automobile driving system, is characterized in that: comprise driving engine (1), entire car controller (HCU), battery management system (BMS), power brick, drive motor control unit (MCU), drive motor (2), start clutch control unit (CCU), start clutch (3), starter, electric oil pump, Automatic Transmission control unit (TCU), engine management system (EMS), described entire car controller (HCU) by CAN respectively with battery management system (BMS), drive motor control unit (MCU), start clutch control unit (CCU), Automatic Transmission control unit (TCU), engine management system (EMS) connect, described battery management system (BMS) is connected with power brick, and described power brick is connected with starter, power brick by inverter respectively with drive motor (2), electric oil pump connects, described drive motor (2) control unit (MCU) is connected with described drive motor (2) by described inverter, and described start clutch control unit (CCU) is connected with start clutch (3).
2. a kind of mixed power automobile driving system according to claim 1, it is characterized in that: described entire car controller (HCU), for according to acceleration pedal signal, brake pedal signal, gear signal, carry out engine torque and start-stop controls, CVT converter speed ratio controls, clutch capacity controls, drive motor drives and power generation torque controls, high-tension battery coupled condition controls;
Described entire car controller (HCU), according to electrokinetic cell electricity, controls car load electric-only mode and travels or hybrid mode traveling.
3. a kind of mixed power automobile driving system according to claim 1, is characterized in that: described power brick is connected with the battery charger with external charge plug.
4. a kind of mixed power automobile driving system according to claim 1, it is characterized in that: described automobile driving system also comprises traditional pony engine (4), torsional damper (5), advance reverse clutch (6), CVT gearshift (7), CVT housing (8), main reduction gear (9), described start clutch (3) and the integrated formation power coupling mechanism of drive motor (2), torsional damper (5) is contained between driving engine (1) and described power coupling mechanism.
5. a kind of mixed power automobile driving system according to claim 4, is characterized in that: described power coupling mechanism to be arranged on before CVT in casing.
6. a driving method for the mixed power automobile driving system according to any one of claim 1-5, is characterized in that: described method comprises the following steps:
A) when electrokinetic cell electricity abundance, car load is in electric-only mode, and entire car controller (HCU) controls start clutch and is in thorough off-state, and car load is driven separately by drive motor;
B) when electrokinetic cell electricity is low, car load enters hybrid mode by electric-only mode, by start clutch, by drive motor pulsation-free, engine starting is entered the state of driving engine and drive motor parallel drive car load;
C) under the serious feed of electrokinetic cell or abnormal condition, entire car controller (HCU) controls driving engine starting, and driving engine drives car load separately.
7. the driving method of a kind of mixed power automobile driving system according to claim 6, is characterized in that: in step c, and in driving engine starting-up process, start clutch is in sliding state of rubbing.
8. the driving method of a kind of mixed power automobile driving system according to claim 6, is characterized in that: in step a, and the condition that car load enters electric-only mode is: acceleration pedal aperture and rate of change are less than setting value; Battery SOC is greater than 30%; Engine coolant temperature is higher than 50 DEG C; Drive motor rotating speed is less than setting value.
9. the driving method of a kind of mixed power automobile driving system according to claim 6, is characterized in that: in stepb, and the condition that car load enters hybrid mode is: the speed of a motor vehicle is less than 100km/h; Acceleration pedal aperture and rate of change are greater than setting value; Battery SOC is less than 30%; Motor exports driving power and is less than setting value.
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| CN110722974A (en) * | 2019-10-12 | 2020-01-24 | 芜湖万里扬变速器有限公司 | Hybrid power transmission system |
| CN111273595A (en) * | 2020-05-08 | 2020-06-12 | 盛瑞传动股份有限公司 | Hybrid transmission control method and device, electronic device, and storage medium |
| CN111356619A (en) * | 2017-11-17 | 2020-06-30 | Fca美国有限责任公司 | Hybrid powertrain system and operation with transfer case in low gear |
| CN112141071A (en) * | 2019-06-10 | 2020-12-29 | 安徽华菱汽车有限公司 | Hybrid vehicle starting control method and device |
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| CN105172571B (en) | 2017-12-12 |
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