Smoothing control for working mode switching and torque of hydrostatic transmission double-motor vehicle

A working mode and dual-motor technology, applied to hybrid vehicles, motor vehicles, electric vehicles, etc., can solve the problems of difficult layout of mechanical power distribution devices, high cost, inaccurate estimation of electric hybrid engine torque, etc., to achieve improved The effect of transmission efficiency and road surface adaptability, low cost, avoiding power interruption or torque surge

Active Publication Date: 2012-02-08
JIANGSU XCMG CONSTR MASCH RES INST LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a motor switching dynamic torque coordination control method for a hydrostatic transmission dual-motor rear-drive vehicle to solve the problems of difficult layout of mechanical power distribution devices, high cost, and inaccurate torque estimation of electric hybrid engines

Method used

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  • Smoothing control for working mode switching and torque of hydrostatic transmission double-motor vehicle
  • Smoothing control for working mode switching and torque of hydrostatic transmission double-motor vehicle
  • Smoothing control for working mode switching and torque of hydrostatic transmission double-motor vehicle

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Embodiment 1

[0018] Embodiment 1: A hydrostatic transmission dual-motor rear-drive vehicle consists of an engine 1, a hydraulic variable pump 2, a pressure sensor 3, a high-pressure hydraulic accumulator 4, a two-position two-way reversing valve 5, a hydraulic pump motor 6, and a clutch 7 , 9, rear wheel 8, variable motor 10, rear axle 11, low-pressure hydraulic accumulator 12 and vehicle controller 13 to form. The working mode switching and switching process torque control method of a hydrostatic transmission dual-motor rear-drive vehicle includes the following steps:

[0019] Step 1: Determine the expected torque and operating conditions of the vehicle under the current conditions according to the descending range of the accelerator pedal and the vehicle speed. The required torque of the vehicle is determined by the position of the accelerator pedal, T r =f(α), the operating conditions of the hydrostatic transmission dual-motor rear-drive vehicle are divided into: low-speed working cond...

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Abstract

The invention relates to a smoothing control for working mode switching and torque of a hydrostatic transmission double-motor vehicle and belongs to a control method for a switching process of a hybrid power vehicle. Distinguishing for a working mode of a vehicle is realized by detecting a vehicle speed and a pedal signal; a hydraulic pump motor and a hydraulic motor are reasonably selected to coordinate and work, thereby promoting the transmission efficiency and pavement adaptability of a serial hybrid power vehicle; and during a process of working mode switching, a method for using an on-line calculating working element to output a torque and dynamically adjust an output torque of a to-be-inserted element is adopted to smoothen the output torque of the whole vehicle, thereby avoiding the phenomena of interrupted driving torque and oversize driving torque during the working mode switching, promoting driving performance and riding comfortableness of the vehicle, and efficiently lowering the cost. The control method has the advantages that the driving performance and riding comfortableness of the vehicle are promoted, the cost is efficiently lowered, a mechanical power distributingdevice is conveniently arranged, and the torque of a hybrid power engine can be accurately calculated.

Description

technical field [0001] The invention relates to a method for controlling the switching process of a hybrid electric vehicle, in particular to a method for switching working modes and controlling smooth torque of a hydrostatic transmission dual-motor vehicle. Background technique [0002] The problem of energy shortage and environmental pollution is becoming more and more serious, which makes the hybrid technology attract extensive attention. Hybrid technology is considered to be one of the effective solutions to solve the energy crisis and environmental pollution problems. The series hydraulic hybrid system can realize the separation of engine load and vehicle driving load, and work in the best fuel economy area in more cases to reduce fuel consumption. , to reduce exhaust emissions, but there are many energy conversion links, and the overall efficiency is not very high. This structure is suitable for traveling devices of small and medium-sized city buses, special vehicles ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K17/14B60K6/46
CPCY02T10/6217Y02T10/62
Inventor 孙辉杨力夫肖刚刘莹莹刘伟王治军王月行杨涛翟海燕赵峰
Owner JIANGSU XCMG CONSTR MASCH RES INST LTD
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