CN101941432B - 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 PDF

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Publication number
CN101941432B
CN101941432B CN201010290515.1A CN201010290515A CN101941432B CN 101941432 B CN101941432 B CN 101941432B CN 201010290515 A CN201010290515 A CN 201010290515A CN 101941432 B CN101941432 B CN 101941432B
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engine
management system
torque
demand
torsion
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CN101941432A (en
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邓柯军
严钦山
李宗华
苏岭
杨宁
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Jiangxi Dingsheng New Material Technology Co ltd
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Chongqing Changan Automobile Co Ltd
Chongqing Changan New Energy Automobile Co Ltd
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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 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

A kind of torque control method of stepless change moderate hybrid electric vehicle
Technical field
The invention belongs to hybrid vehicle control field, particularly a kind of CVT(stepless change) torque control method of moderate hybrid electric vehicle.
Background technology
The speed change system that is present at present the hybrid vehicle outfit on market mainly contains manually (MT), automatic (AT) and manual/automatic integratedization speed change system.Due to cost and technical reason, CVT hybrid vehicle is less, mainly appears on high-end automobile.
Although be equipped with the hybrid vehicle of MT speed change system, have good drive propulsion and economy, MT manipulation strength for chaufeur is large, and to drive fuel economy, the disposal of pollutants performance of the different car loads of skill level different because of chaufeur.But be equipped with simple and easy, the energy-conservation problem that has gearshift inefficiency of hybrid vehicle operation of AT speed change system.CVT has solved the problem of AT gearshift inefficiency technically, CVT can realize without gearshift, moment of torsion output continuously, when braking energy reclaims, be that energy recovery is provided convenience, CVT can allow driving engine be operated in optimum condition in the most of the time by Fast transforms speed ratio, and the ideal that also becomes hybrid vehicle based on these advantages CVT is first-selected.
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 focus on riding stability and driver comfort for the control of the mixed electrical automobile of CVT, not using the reasonable distribution of energy as emphasis, will make like this car load economy, exhaust emissions effect give a discount.
Summary of the invention
The invention provides a kind of torque control method of CVT moderate hybrid electric vehicle, to solve the mixed electrical automobile energy distribution reasonableness problem of CVT.This scheme is scientific and reasonable, can meet 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 electric vehicle, described method is first by engine management system ECU, according to chaufeur accelerator pedal displacement amount, to calculate car load demand torque, after calculating car load demand torque, engine management system ECU sends to entire car controller HCU by 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: first meet Motor torque demand, engine torque equals the difference of car load demand torque and Motor torque; Then with the engine torque distributing, be multiplied by present engine rotating speed and draw engine demand power, according to driving engine optimum curve for operation, table look-up and obtain engine demand moment of torsion and the demand rotating speed under current demand power again, 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 car load demand torque distribute and monitor 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, gearbox controller is responsible for monitoring and is switched change-speed box mode of operation.
The inventive method can meet car load dynamic property, also can engine operation operating mode is optimized in conjunction with CVT operating characteristic, makes car load fuel oil consumption more economical, and disposal of pollutants still less, has reached the effect of certain energy-saving and emission-reduction; This scheme is scientific and reasonable, has exploitativeness, and meeting historical background can be widely applied on CVT hybrid vehicle.
Accompanying drawing explanation
Fig. 1: a kind of CVT moderate hybrid electric vehicle power system structured flowchart of the present invention.
Fig. 2: a kind of CVT moderate hybrid electric vehicle moment of torsion control principle drawing of the present invention.
The specific embodiment
This hybrid power automobile power system structure, as Fig. 1, comprises 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 is mainly responsible for coordinating to control, engine management system ECU is mainly responsible for monitoring engine work, battery management system BCU is mainly responsible for the work of monitoring electrokinetic cell, motor management systems IPU is mainly responsible for monitoring machine operation, and change-speed box management system TCU is mainly 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 when high-tension battery group electric energy not cannot drive motor start the engine, entire car controller HCU can control starter and carrys out 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; High-tension battery group by DCDC change output 12V voltage for car load other; Engine management system ECU can obtain 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 pattern switching, distribute torque, pass on again torque command to electric machine controller IPU and engine management system ECU, to meet the power demand of car load.
This mixing dynamical vehicle torsional moment control principle as shown in Figure 2.Engine management system ECU obtains car load demand torque and car load demand torque is sent to entire car controller HCU according to chaufeur accelerator pedal displacement amount, and entire car controller HCU obtains first judging after 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, accelerates power-assisted, normally moves isotype and switch, according to various patterns, require to distribute engine torques and Motor torque.
Distribution principle is: first master controller HCU meets Motor torque demand in distribute torque, and wherein Motor torque is tabled look-up and obtained by current battery electric quantity SOC, present engine rotating speed and CVT speed ratio.By said method, tabled look-up and obtained after Motor torque, engine torque is the difference of car load demand torque and Motor torque, but this engine torque is not driving engine best torque.
Under any operating mode, driving engine has best operating point, and driving engine is best in best operating point serviceability, oil consumption is most economical.And CVT toric transmission can allow driving engine be operated in optimal working point in the most of the time by Fast transforms speed ratio without gearshift in theory, based on above-mentioned we can take by engine operation, in the strategy protocol of best operating point, to complete moment of torsion based on stepless change CVT real-time change speed ratio and control.
On CVT moderate hybrid electric vehicle, take following optimisation strategy, master controller HCU still takes aforementioned distribution method to distribute Motor torque and engine torque, and recycling engine torque is multiplied by present engine revolution counter calculates driving engine current power.Then by looking into driving engine optimum curve for operation, obtain engine demand moment of torsion and CVT demand rotating speed (can draw driving engine best effort moment of torsion and the optimum operating speed under current demand power according to the intersection point of the optimum curve for operation of driving engine and equipower line).CVT, according to current vehicle speed and demand optimum operating speed conversion speed ratio, constantly regulates engine speed, makes engine speed constantly near optimum operating speed and CVT demand rotating speed, allows engine operation at best operating point.
In whole system, the moment of torsion of driving engine, motor, CVT, car load and rotating speed all should take reasonable measure and limited and guarantee that each several part collaborative work is to meet chaufeur demand, and in support system, the safe operation of each element is not damaged, 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 electric vehicle, described method is first by engine management system ECU, according to chaufeur accelerator pedal displacement amount, to calculate car load demand torque, engine management system ECU sends to entire car controller HCU after calculating 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 again torque command to electric machine controller IPU and engine management system ECU, to meet the power demand of car load;
The principle that described Motor torque and engine torque distribute is as follows: first meet Motor torque demand, engine torque equals the difference of car load demand torque and Motor torque; Then with the engine torque distributing, be multiplied by present engine rotating speed and draw engine demand power, according to driving engine optimum curve for operation, table look-up and obtain engine demand moment of torsion and the toric transmission CVT demand rotating speed under current demand power again, change-speed box management system makes toric transmission CVT according to current vehicle speed and demand transformation of speed speed ratio after receiving toric transmission 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 car load demand torque distribute and monitor control;
Thereby engine management system and motor management systems are responsible for responding the demand torque of entire car controller and are driven car load work, change-speed box management system is responsible for monitoring and is switched toric transmission mode of operation;
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 the work of high-tension battery group;
Motor management systems IPU is responsible for monitoring machine operation;
Change-speed box management system TCU is responsible for monitoring toric transmission 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; High-tension battery group by DCDC DC converting circuit output 12V voltage for car load other.
CN201010290515.1A 2010-09-25 2010-09-25 Method for controlling torsion of stepless variable-speed moderate hybrid vehicle Active CN101941432B (en)

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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
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
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
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
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
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
CN114954427A (en) * 2020-12-25 2022-08-30 浙江吉利控股集团有限公司 Control method of hybrid electric vehicle, vehicle-mounted terminal, and storage medium
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Effective date of registration: 20170113

Address after: Chancheng District of Guangdong city in Foshan province after the 528000 season 131 West Road No. 1 building A room by 601-604

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Address before: 400023 Chongqing Jiangbei District, the new East Road, No. 260

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Address after: 528000 room 601-604, building A, block, building 131, Jihua West Road, Chancheng District, Guangdong, Foshan

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