CN101941432A - Method for controlling torsion of stepless variable-speed moderate hybrid vehicle - Google Patents
Method for controlling torsion of stepless variable-speed moderate hybrid vehicle Download PDFInfo
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- CN101941432A CN101941432A CN2010102905151A CN201010290515A CN101941432A CN 101941432 A CN101941432 A CN 101941432A CN 2010102905151 A CN2010102905151 A CN 2010102905151A CN 201010290515 A CN201010290515 A CN 201010290515A CN 101941432 A CN101941432 A CN 101941432A
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Abstract
The invention provides a method for controlling the torsion of a stepless variable-speed moderate hybrid vehicle, which comprises the following steps that: an engine management system ECU calculates the torsion required by an integral vehicle according to the displacement amount of an accelerator pedal of a driver, after the torsion required by the integral vehicle is calculated, the engine management system ECU sends the torsion required by the integral vehicle to an integral vehicle controller HCU, and the integral vehicle controller HCU distributes motor torsion and engine torsion according to the condition of the current electric quantity of a battery and the running condition of an engine. Through the method, the dynamic property of the integral vehicle can be met, and the working condition of the engine is optimized by combining with the operating characteristic of CVT, so that the integral vehicle has economic consumption of fuel oil and less pollution emission, and achieves the effects of energy conservation and emission reduction.
Description
Technical field
The invention belongs to hybrid vehicle control field, particularly a kind of CVT(stepless change) torque control method of moderate hybrid vehicle.
Background technology
The speed change system that is present in the hybrid vehicle outfit on the market at present mainly contains manually (MT), automatic (AT) and manual/automatic integratedization speed change system.Because cost and technical reason, the CVT hybrid vehicle is less, mainly appears on the high-end automobile.
Though be equipped with the hybrid vehicle of MT speed change system good drive propulsion and economy are arranged, MT manipulation strength for chaufeur is big, and fuel economy, the disposal of pollutants performance of driving the different car loads of skill level because of chaufeur have nothing in common with each other.But be equipped with simple and easy, the energy-conservation problem that has the gearshift inefficiency of hybrid vehicle operation of AT speed change system.CVT has solved the problem of AT gearshift inefficiency technically, CVT can realize not having gearshift, moment of torsion output continuously, be that energy recovery is provided convenience when braking energy reclaims, CVT can allow driving engine be operated in optimum condition in the most of the time by the Fast transforms speed ratio, also becomes the desirable first-selected of hybrid vehicle based on these advantages CVT.
General mixed electrical automobile control method also concentrates on mostly to manually (MT), the control of the automobile of (AT), manual/automatic integratedization speed change system automatically, and mainly pay attention to riding stability and driver comfort for the control of the mixed electrical automobile of CVT, not the reasonable distribution of energy as emphasis, car load economy, exhaust emissions effect are given a discount.
Summary of the invention
The invention provides a kind of torque control method of CVT moderate hybrid vehicle, mix electrical automobile energy distribution reasonableness problem to solve CVT.This scheme is scientific and reasonable, can satisfy the requirement of car load dynamic property and economy.
Technical scheme of the present invention is:
A kind of torque control method of CVT moderate hybrid vehicle, described method is to calculate the car load demand torque by engine management system ECU according to chaufeur accelerator pedal displacement amount earlier, after calculating the car load demand torque, engine management system ECU sends to entire car controller HCU with the car load demand torque, and entire car controller HCU carries out Motor torque and engine torque distribution according to current battery electric quantity situation and driving engine operation conditions again;
The principle of distributing is as follows: at first satisfy the Motor torque demand, engine torque equals the difference of car load demand torque and Motor torque; Multiply by the present engine rotating speed with the engine torque that distributes then and draw engine demand power, table look-up according to the driving engine optimum curve for operation again and obtain engine demand moment of torsion and demand rotating speed under the current demand power, CVT controls speed ratio, thereby allows the optimum condition of engine operation under current demand power.
Technical scheme of the present invention relates generally to whole car controller of hybrid electric car, engine management system, electric machine controller, gearbox controller, entire car controller is responsible for the car load demand torque is distributed and monitors control, thereby and engine management system and electric machine controller are responsible for responding the demand torque of master controller and are driven car load work, and gearbox controller is responsible for monitoring and is switched the change-speed box mode of operation.
The inventive method can satisfy the car load dynamic property, also can the engine operation operating mode is optimized in conjunction with the CVT operating characteristic, makes the car load fuel oil consumption more economical, and disposal of pollutants has still less reached the effect of certain energy-saving and emission-reduction; This scheme is scientific and reasonable, has exploitativeness, and meeting historical background can be applied on the CVT hybrid vehicle.
Description of drawings
Fig. 1: a kind of CVT moderate hybrid power automobile power system structured flowchart of the present invention.
Fig. 2: a kind of CVT moderate mixing dynamical vehicle torsional moment control principle figure of the present invention.
The specific embodiment
This hybrid power automobile power system structure such as Fig. 1 comprise driving engine, toric transmission CVT, motor, high-tension battery group, DCDC DC converting circuit.Also possesses following electronic controller: entire car controller HCU, engine management system ECU, battery management system BCU, motor management systems IPU, change-speed box management system TCU etc.
Wherein entire car controller HCU mainly is responsible for co-operative control, engine management system ECU mainly is responsible for monitoring engine work, battery management system BCU mainly is responsible for the work of monitoring electrokinetic cell, motor management systems IPU mainly is responsible for the monitoring machine operation, and change-speed box management system TCU mainly is responsible for monitoring CVT work; Driving engine, motor are coaxial connection, and its moment of torsion output is by toric transmission CVT no-load voltage ratio rear drive wheel; System carries starter, and entire car controller HCU can control starter and comes start the engine when high-tension battery group electric energy inadequately can't the drive motor start the engine; Entire car controller HCU, engine management system ECU, power-supply management system BCU, change-speed box management system TCU are by the mutual communication of CAN bus; The high-tension battery group is exported 12V voltage for other uses of car load by the DCDC conversion; Engine management system ECU can obtain the car load demand torque according to chaufeur Das Gaspedal demand, master controller HCU obtains this moment of torsion can judge that current state carries out mode switch, distribute torque, pass on torque command to give electric machine controller IPU and engine management system ECU again, to satisfy the power demand of car load.
This mixing dynamical vehicle torsional moment control principle as shown in Figure 2.Engine management system ECU obtains the car load demand torque and the car load demand torque is sent to entire car controller HCU according to chaufeur accelerator pedal displacement amount, and entire car controller HCU obtains at first judging behind this moment of torsion that current car load running state states such as (be acceleration and deceleration) travelling, at the uniform velocity travel, brake, slide carries out energy recovery, quickens power-assisted, normally moves isotype and switch, require to distribute engine torques and Motor torque according to various patterns.
Distribution principle is: master controller HCU at first satisfies the Motor torque demand in distribute torque, and wherein Motor torque is tabled look-up by current battery electric quantity SOC, present engine rotating speed and CVT speed ratio and obtained.By said method table look-up obtain Motor torque after, then engine torque is the difference of car load demand torque and Motor torque, but this engine torque is not to be the driving engine best torque.
Driving engine all has best operating point under any operating mode, and driving engine is most economical in best operating point serviceability the best, oil consumption.Can not allow driving engine be operated in optimal working point in theory by the Fast transforms speed ratio and the CVT toric transmission has gearshift in the most of the time, based on above-mentioned we can take to finish torque control by engine operation in the strategy protocol of best operating point based on stepless change CVT real-time change speed ratio.
Take following optimisation strategy on CVT moderate hybrid vehicle, master controller HCU still takes aforementioned distribution method to distribute Motor torque and engine torque, utilizes engine torque to multiply by the present engine revolution speed calculating again and goes out the driving engine current power.Obtain engine demand moment of torsion and CVT demand rotating speed (promptly can draw driving engine best effort moment of torsion and optimum operating speed under the current demand power) by looking into the driving engine optimum curve for operation then according to the intersection point of the optimum curve for operation of driving engine and equipower line.CVT constantly regulates engine speed according to current vehicle speed and demand optimum operating speed conversion speed ratio, makes engine speed constantly near optimum operating speed and CVT demand rotating speed, allows engine operation at best operating point.
The moment of torsion of driving engine, motor, CVT, car load and rotating speed all should take reasonable measure and be limited and guarantee that the each several part collaborative work is to satisfy the chaufeur demand in total system, and the safe operation of each element is not damaged in the support system, car load safety and driver safety also can reach the requirement of car load driver comfort, reliability.
Claims (1)
1. the torque control method of a stepless change moderate hybrid vehicle, described method is to calculate the car load demand torque by engine management system ECU according to chaufeur accelerator pedal displacement amount earlier, engine management system ECU sends to entire car controller HCU after calculating the car load demand torque, and entire car controller HCU carries out Motor torque and engine torque distribution according to current battery electric quantity situation and driving engine operation conditions again; Pass on torque command to give electric machine controller IPU and engine management system ECU again, to satisfy the power demand of car load;
The principle that described Motor torque and engine torque distribute is as follows: at first satisfy the Motor torque demand, engine torque equals the difference of car load demand torque and Motor torque; Multiply by the present engine rotating speed with the engine torque that distributes then and draw engine demand power, table look-up according to the driving engine optimum curve for operation again and obtain engine demand moment of torsion and CVT demand rotating speed under the current demand power, the change-speed box management system makes toric transmission CVT according to current vehicle speed and demand transformation of speed speed ratio after receiving CVT demand rotating speed, thereby allows the optimum condition of engine operation under current demand power;
Described method relates to driving engine, toric transmission CVT, motor, high-tension battery group, DCDC DC converting circuit, entire car controller HCU, engine management system ECU, battery management system BCU, motor management systems IPU, change-speed box management system TCU;
Entire car controller is responsible for the car load demand torque is distributed and monitors control;
Engine management system and electric machine controller, gearbox controller are responsible for monitoring and are switched the change-speed box mode of operation;
Comprise
Thereby engine management system ECU is responsible for responding the demand torque of entire car controller and drives and monitoring engine work;
Battery management system BCU is responsible for monitoring electrokinetic cell work;
Motor management systems IPU is responsible for monitoring machine operation;
Change-speed box management system TCU is responsible for monitoring CVT work;
Described driving engine is connected with motor coaxle, and its moment of torsion output is by toric transmission CVT converter speed ratio rear drive wheel; Entire car controller HCU, engine management system ECU, power-supply management system BCU, change-speed box management system TCU are by the mutual communication of CAN bus; The high-tension battery group is exported 12V voltage for other uses of car load by the direct change-over circuit of DCDC.
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| CN201010290515.1A CN101941432B (en) | 2010-09-25 | 2010-09-25 | Method for controlling torsion of stepless variable-speed moderate hybrid vehicle |
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| CN201010290515.1A CN101941432B (en) | 2010-09-25 | 2010-09-25 | Method for controlling torsion of stepless variable-speed moderate hybrid vehicle |
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Cited By (15)
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| CN102582616A (en) * | 2012-02-22 | 2012-07-18 | 清华大学 | CVT (continuously variable transmission) hybrid electric vehicle power source torque optimizing distribution method |
| CN102729991A (en) * | 2012-06-20 | 2012-10-17 | 浙江大学 | Hybrid bus energy distribution method |
| CN103350696A (en) * | 2013-07-11 | 2013-10-16 | 北京交通大学 | Device and method for controlling torque output of hybrid electric vehicle |
| CN106467109A (en) * | 2015-08-17 | 2017-03-01 | 广州汽车集团股份有限公司 | A kind of torque control method of hybrid vehicle |
| CN107380159A (en) * | 2017-07-04 | 2017-11-24 | 天津大学 | A kind of automobile dynamic system and its adjusting method of torque |
| CN109278739A (en) * | 2017-07-19 | 2019-01-29 | 舍弗勒技术股份两合公司 | The control method and hybrid vehicle of the creeping torque of hybrid vehicle |
| CN109795341A (en) * | 2019-01-22 | 2019-05-24 | 南京越博动力系统股份有限公司 | A kind of energy-efficient control method of pure electric automobile equipped with CVT stepless transmission |
| CN110435633A (en) * | 2019-07-16 | 2019-11-12 | 同济大学 | A kind of hybrid vehicle takes into account the oil consumption control method of discharge |
| CN110962832A (en) * | 2019-12-20 | 2020-04-07 | 重庆长安工业(集团)有限责任公司深圳分公司 | Control method and related product |
| CN112061112A (en) * | 2020-05-12 | 2020-12-11 | 浙江万里扬股份有限公司 | Control method, hybrid power system and vehicle |
| CN112339742A (en) * | 2019-08-09 | 2021-02-09 | 比亚迪股份有限公司 | Hybrid electric vehicle, torque distribution method and torque distribution device thereof |
| CN112380617A (en) * | 2020-10-27 | 2021-02-19 | 上汽通用五菱汽车股份有限公司 | E-CVT control curve design method |
| CN112644454A (en) * | 2020-12-25 | 2021-04-13 | 浙江吉利控股集团有限公司 | Control method of hybrid electric vehicle, vehicle-mounted terminal, and storage medium |
| CN112834225A (en) * | 2021-01-05 | 2021-05-25 | 吉孚动力技术(中国)有限公司 | Test and response method for torque fault of driving motor of hybrid power system |
| CN113544413A (en) * | 2019-03-06 | 2021-10-22 | 罗伯特·博世有限公司 | Method for operating an electric vehicle powertrain with a continuously variable transmission |
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Cited By (23)
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| CN102582616B (en) * | 2012-02-22 | 2014-08-13 | 清华大学 | CVT (continuously variable transmission) hybrid electric vehicle power source torque optimizing distribution method |
| CN102582616A (en) * | 2012-02-22 | 2012-07-18 | 清华大学 | CVT (continuously variable transmission) hybrid electric vehicle power source torque optimizing distribution method |
| CN102729991A (en) * | 2012-06-20 | 2012-10-17 | 浙江大学 | Hybrid bus energy distribution method |
| CN102729991B (en) * | 2012-06-20 | 2014-11-19 | 浙江大学 | Hybrid bus energy distribution method |
| CN103350696A (en) * | 2013-07-11 | 2013-10-16 | 北京交通大学 | Device and method for controlling torque output of hybrid electric vehicle |
| CN103350696B (en) * | 2013-07-11 | 2016-04-27 | 北京交通大学 | A kind of device and method controlling mixing dynamical vehicle torsional moment and export |
| CN106467109A (en) * | 2015-08-17 | 2017-03-01 | 广州汽车集团股份有限公司 | A kind of torque control method of hybrid vehicle |
| CN106467109B (en) * | 2015-08-17 | 2019-02-15 | 广州汽车集团股份有限公司 | A kind of torque control method of hybrid vehicle |
| CN107380159A (en) * | 2017-07-04 | 2017-11-24 | 天津大学 | A kind of automobile dynamic system and its adjusting method of torque |
| CN109278739B (en) * | 2017-07-19 | 2024-02-27 | 舍弗勒技术股份两合公司 | Control method of creep torque of hybrid vehicle and hybrid vehicle |
| CN109278739A (en) * | 2017-07-19 | 2019-01-29 | 舍弗勒技术股份两合公司 | The control method and hybrid vehicle of the creeping torque of hybrid vehicle |
| CN109795341A (en) * | 2019-01-22 | 2019-05-24 | 南京越博动力系统股份有限公司 | A kind of energy-efficient control method of pure electric automobile equipped with CVT stepless transmission |
| CN113544413A (en) * | 2019-03-06 | 2021-10-22 | 罗伯特·博世有限公司 | Method for operating an electric vehicle powertrain with a continuously variable transmission |
| CN110435633B (en) * | 2019-07-16 | 2022-07-19 | 同济大学 | Fuel consumption control method for hybrid electric vehicle with emission consideration |
| CN110435633A (en) * | 2019-07-16 | 2019-11-12 | 同济大学 | A kind of hybrid vehicle takes into account the oil consumption control method of discharge |
| CN112339742A (en) * | 2019-08-09 | 2021-02-09 | 比亚迪股份有限公司 | Hybrid electric vehicle, torque distribution method and torque distribution device thereof |
| CN110962832A (en) * | 2019-12-20 | 2020-04-07 | 重庆长安工业(集团)有限责任公司深圳分公司 | Control method and related product |
| CN110962832B (en) * | 2019-12-20 | 2021-04-30 | 重庆长安工业(集团)有限责任公司深圳分公司 | Control method and related product |
| CN112061112A (en) * | 2020-05-12 | 2020-12-11 | 浙江万里扬股份有限公司 | Control method, hybrid power system and vehicle |
| CN112061112B (en) * | 2020-05-12 | 2022-01-04 | 浙江万里扬股份有限公司 | Control method, hybrid power system and vehicle |
| CN112380617A (en) * | 2020-10-27 | 2021-02-19 | 上汽通用五菱汽车股份有限公司 | E-CVT control curve design method |
| CN112644454A (en) * | 2020-12-25 | 2021-04-13 | 浙江吉利控股集团有限公司 | Control method of hybrid electric vehicle, vehicle-mounted terminal, and storage medium |
| CN112834225A (en) * | 2021-01-05 | 2021-05-25 | 吉孚动力技术(中国)有限公司 | Test and response method for torque fault of driving motor of hybrid power system |
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