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Method, device and TCU for controlling shifting rotation speed

A control method and technology of a control device, applied in the automotive field, can solve problems such as prolonging the shifting time, and achieve the effects of reducing the shifting time, improving the smoothness and ensuring the consistency

Active Publication Date: 2017-04-19
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in this case, the shift time will be extended

Method used

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  • Method, device and TCU for controlling shifting rotation speed
  • Method, device and TCU for controlling shifting rotation speed
  • Method, device and TCU for controlling shifting rotation speed

Examples

Experimental program
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Embodiment Construction

[0046] At present, in the process of shifting a hybrid electric vehicle equipped with a dual-clutch automatic transmission, taking the upshift control in the engine mode as an example, it can generally be divided into three stages, namely clutch preflush oil control, torque phase and speed In the phase phase, in order to make the engine speed drop to the speed corresponding to the gear after the upshift, the engine speed is indirectly adjusted through the torque control signal, that is, it is controlled by reducing the intake air volume, delaying the ignition angle and cutting off the fuel. Engine torque in order to achieve a reduction in engine speed.

[0047]But in this case, because the method of indirectly adjusting the rotational speed of the power source through the torque control signal is not the method of directly controlling the rotational speed of the power source, the shifting time will be prolonged. And when the engine is used as a power source when the vehicle is...

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Abstract

The invention provides a method, device and TCU for controlling a shifting rotation speed. The method comprises the steps that the TCU detects a running mode of a vehicle; when the vehicle runs under a pure motor mode, the TCU will send out a shifting instruction to control a clutch to start working if the speed of the vehicle reaches a shifting point; when work of the clutch is found to satisfy preset conditions, the TCU will reduce the clutch transmission torque corresponding to the current shift and increase the clutch transmission torque corresponding to a shift obtained after the shifting; and when the clutch transmission torque corresponding to the current shift is reduced to a first preset threshold value, the TCU will send out a rotation speed request signal to let an HCU adjust the motor rotation speed to be consistent with the rotation speed of a transmission input shaft corresponding to the shift obtained after the shifting. By the scheme, shifting duration can be reduced.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a method, device and TCU for controlling the shift speed. Background technique [0002] Cars are playing an increasingly important role in modern society and have become an indispensable part of most people's daily lives. Under the background of advocating environmental protection, pure electric vehicles and hybrid electric vehicles (Hybrid Electric Vehicle, HEV) emerge at the historic moment. When a hybrid vehicle is running, there are three modes: pure engine mode, pure motor mode and hybrid mode. Among them: pure engine mode, only the engine provides power. In pure motor mode, only the motor provides power. In hybrid mode, the engine and electric motor provide power simultaneously. The hybrid controller (Hybrid Control Unit, HCU) is the core of the entire vehicle control, mainly responsible for coordinating the engine management system (Engine Management System, EMS), automatic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/30B60W10/02B60W40/105B60W10/08
CPCB60W10/02B60W10/08B60W20/30B60W40/105B60W2510/0275B60W2710/081
Inventor 仇杰孙贤安
Owner SAIC MOTOR
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