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Control method and device for power switching and hybrid control unit (HCU)

A power switching and control method technology, which is applied in the automotive field, can solve problems such as poor driving comfort, and achieve the effects of improving driving comfort, shortening shift time, and improving consistency

Active Publication Date: 2017-04-26
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in this case, due to the different characteristics of the engine and motor, it may result in poor ride comfort

Method used

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  • Control method and device for power switching and hybrid control unit (HCU)
  • Control method and device for power switching and hybrid control unit (HCU)
  • Control method and device for power switching and hybrid control unit (HCU)

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Experimental program
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Embodiment Construction

[0036] At present, in the hybrid mode of a hybrid electric vehicle, the driving power of the vehicle is provided by two power sources of the motor and the engine at the same time. The control mode adjusts the rotation speed of the power source and the rotation speed of the clutch corresponding to the gear after the shift.

[0037] In order to enable those skilled in the art to better understand the shifting process, figure 1 It shows a process diagram of a hybrid electric vehicle shifting from 2nd gear to 3rd gear by stepping on the gas pedal in the hybrid mode in the prior art. The whole upshifting process can be divided into (1), (2) and (3) control process, in which: (1) is the stage of TCU’s pre-engagement control of synchronizer; (2) is the stage of TCU’s control of clutch and EMS and HCU torque reduction Control stage; (3) is the TCU control stage for synchronizer off-gear.

[0038] figure 1 (a) is a curve diagram of the throttle signal change; figure 1 (b) is the DC...

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PUM

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Abstract

The invention relates to a control method and device for power switching and a hybrid control unit (HCU). The control method comprises the following steps that whether a transmission control unit (TCU) is allowed to be shifted or not is judged by the HCU; when it is determined that the HCU allows the TCU to be shifted, and the TCU controls a synchronizer to perform a pre-meshing movement, the HCU switches various power sources into one power source of a motor; the HCU adjusts the rotating speed of the motor to be consistent with the rotating speed of an input shaft of a transmission corresponding to a shifted gear; and when the TCU completes the movement of shifting, the HCU switches the one power source of the motor into the various power sources. Through the adoption of the scheme of the control method disclosed by the invention, the driving smoothness can be improved, and the shifting time is shortened.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a power switching control method, device and HCU. Background technique [0002] In modern society, cars play an increasingly important role and have become an integral 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 for short) 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 Control Unit (HCU) is the core of the entire vehicle control, mainly responsible for coordinating the Engine Management System (Engine Management System, EMS), Transmission Control Unit (Transmissio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/40B60W10/08B60W10/11
CPCB60W10/08B60W10/11B60W20/30B60W20/40B60W2710/081B60W2710/1011
Inventor 仇杰孙贤安
Owner SAIC MOTOR
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