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Control method for electric vehicle creep torque

A technology for electric vehicles and control methods, which is applied in electric vehicles, transmission control, control driving, etc., can solve problems such as difficult implementation, difficult and troublesome calibration, and achieve the effects of easy implementation, simple and intuitive principle, and simple calibration.

Active Publication Date: 2017-07-07
SHANGHAI COTECH AUTOMOTIVE ENG CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the PI parameters need to be calibrated. The PI parameters are the calibration quantities related to the motor speed. Calibration will be very difficult and troublesome, so it is not easy to implement.

Method used

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  • Control method for electric vehicle creep torque

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0036] Such as figure 1 As shown, the present embodiment provides a method for controlling the creep torque of an electric vehicle. The vehicle controller controls the motor by calculating the creep torque required by the electric vehicle, including the following steps:

[0037] 1) Read the base value T of the creep torque of the car q _creep_base;

[0038] 2) Read the acceleration parameters and basic information parameters of the car, and calculate the creep torque slope resistance compensation value T of the car according to the two q _slope:

[0039] 21) Read the acceleration ...

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Abstract

The invention relates to a control method for electric vehicle creep torque. A vehicle control unit controls a motor by calculating the creep torque required by a vehicle. The control method comprises the following steps that the vehicle creep torque base value T<q_creep_base> is read; the accelerated speed parameter and the basic information parameter of the vehicle are read, and the creep torque slope resistance compensation value T<q_slope> of the vehicle is worked out according to the accelerated speed parameter and the basic information parameter; the raw creep torque value T<q_creep_raw> is worked out according to the vehicle creep torque base value T<q_creep_base> and the creep torque slope resistance compensation value T<q_slope>; the current gear of the vehicle is read, and the vehicle creep torque compensation resistance value T<q_creep_temp> is worked out according to the gear; and the creep torque T<q_creep> required by the vehicle is obtained according to the raw creep torque value T<q_creep_raw> and the vehicle creep torque compensation resistance value T<q_creep_temp>. Compared with the prior art, the control method has the advantages of being simple in principle, easy to calibrate and the like.

Description

technical field [0001] The invention relates to the field of new energy vehicle control, in particular to a control method for electric vehicle creep torque. Background technique [0002] The creep control function of traditional automobiles is usually realized by the automatic transmission controller. Since the engine has a minimum idle speed limit, the creep control function needs to include torque control and differential speed control. The automatic transmission controller is controlled by clutch slip friction (DCT / AMT) or hydraulic torque converter coupling degree control (AT / CVT) to realize creep control function. [0003] For electric vehicles, since the power motor has no minimum speed limit, and many of the matched transmissions do not have clutches, the creep control method of traditional vehicles is no longer applicable. [0004] The application number is CN201410740396.3 A method for controlling the creep torque of a motor-driven vehicle, the method includes: a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20
CPCB60L15/2081B60L2240/423Y02T10/72B60L15/2063B60L15/20B60L2240/642B60W2520/10B60W30/18063B60L2240/12B60W2710/083B60L2240/16B60L2240/26B60L2240/421B60L2240/48F16H63/50
Inventor 于心宝张志伟张凯
Owner SHANGHAI COTECH AUTOMOTIVE ENG CORP LTD
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