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Mode switching method and system for a hybrid electric vehicle

A hybrid vehicle, mode switching technology, applied in the field of vehicle control, can solve problems such as unreasonable, affecting vehicle start-stop performance, driving performance and safety performance, and untimely hybrid vehicle mode switching.

Active Publication Date: 2018-08-03
BEIQI FOTON MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that the mode switching of the hybrid electric vehicle is not timely or unreasonable due to problems in clutch control, thereby affecting the start-stop performance, drivability and safety performance of the vehicle, thus proposing a A hybrid electric vehicle mode switching method and system that realize timely and reasonable switching of various modes of a hybrid electric vehicle by reasonably controlling the clutch, which can enable the vehicle to obtain good start-stop performance and drivability while greatly reducing energy consumption

Method used

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  • Mode switching method and system for a hybrid electric vehicle
  • Mode switching method and system for a hybrid electric vehicle

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Embodiment 1

[0112] Such as Figure 2-4 As shown, the present embodiment provides a hybrid electric vehicle mode switching method, comprising the following steps:

[0113] S1: In the initialization state, it is detected that the high-voltage power-on of the whole vehicle is successful, and the expected mode of the whole vehicle changes from the initialization mode to the pure electric mode. In the initialization state, the whole vehicle is in the low-voltage power-on state, and the vehicle controller (HCU) controls the clutch to be in the closed state.

[0114] S2: Send the mode switching control signal and the clutch separation control signal to the transmission controller (TCU);

[0115] S3: Receive the clutch disengagement status signal sent by the gearbox controller, at this time the actual mode of the vehicle is switched to pure electric mode;

[0116] S4: sending the mode keeping control signal to the gearbox controller;

[0117] S5: It is detected that the opening of the accelera...

Embodiment 2

[0140] Such as Figure 3-5 As shown, the present embodiment provides a hybrid electric vehicle mode switching method, comprising the following steps:

[0141] S21: receiving the mode switching control signal and the clutch separation control signal sent by the vehicle controller;

[0142] S22: control clutch disengagement;

[0143] S23: Send the clutch disengagement state signal to the vehicle controller;

[0144] S24: Receive the mode maintenance control signal sent by the vehicle controller, and control the clutch to maintain the disengaged state. At this time, the actual mode of the vehicle is pure electric mode;

[0145] S25: receiving the mode switching control signal and the clutch separation control signal sent by the vehicle controller;

[0146] S26: control the clutch to keep the disengaged state;

[0147] S27: Receive the mode maintenance control signal sent by the vehicle controller, and continue to control the clutch to maintain the disengaged state. At this ti...

Embodiment 3

[0166] Such as Figure 2-5 As shown, the present embodiment provides a hybrid electric vehicle mode switching method, comprising the following steps:

[0167] S31: In the initialization state, the vehicle controller detects that the high-voltage power-on of the vehicle is successful, and the expected mode of the vehicle changes from the initialization mode to the pure electric mode;

[0168] S32: The vehicle controller sends the mode switching control signal and the clutch separation control signal to the gearbox controller;

[0169] S33: The transmission controller receives the mode switching control signal and the clutch separation control signal sent by the vehicle controller;

[0170] S34: the transmission controller controls the clutch separation;

[0171] S35: The gearbox controller sends a clutch disengagement state signal to the vehicle controller;

[0172] S36: The vehicle controller receives the clutch separation status signal sent by the transmission controller, ...

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Abstract

A mode switching method and system for a hybrid electric vehicle, comprising the following steps: detecting that the vehicle is powered on successfully at high voltage; sending a mode switching control signal and a clutch separation control signal; receiving a clutch separation state signal, and the actual mode of the vehicle is pure electric at this time mode; send the mode hold control signal to the gearbox controller; detect that the accelerator pedal opening is greater than the pure electric-series mode switch calibration value; send the mode switch control signal and the clutch separation control signal; detect that the engine is started successfully; send the mode hold control signal to the transmission controller. The invention solves the problems of high energy consumption of the vehicle caused by problems in the control of the clutch in the existing mode switching method of the hybrid electric vehicle and affects the start-stop performance and drivability of the vehicle, and the like. The technical solution provided by the invention can achieve good start-stop performance, driving performance and safety performance while greatly reducing energy consumption through reasonable control of the clutch.

Description

technical field [0001] The invention relates to the technical field of vehicle control. Specifically, it relates to a hybrid electric vehicle mode switching method and system. Background technique [0002] Such as figure 1 As shown, it is the structure of the existing automobile hybrid power system, the solid line indicates the mechanical connection, and the dotted line indicates the control signal, including the engine, clutch, clutch actuator, automobile starter generator (ISG motor), drive motor, electronically controlled mechanical Automatic gearbox (AMT gearbox) and final drive. The hybrid power system is a dual-motor single-clutch mode, and the control system is complicated, but it can realize the switching of various modes such as pure electric, series, parallel, start-stop, etc. [0003] In the pure electric mode, the vehicle runs on the electric motor and the electric power supplied from the driving battery; in the series mode, the ISG motor starts and generates ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/02B60W10/10B60W30/182
Inventor 孔令安
Owner BEIQI FOTON MOTOR CO LTD
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