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A method for controlling the idle speed of a hybrid electric vehicle engine

A hybrid vehicle and engine idling technology, which is applied to hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve the problems of large vibration of the engine 2, and achieve the effect of stable engine idle speed control

Active Publication Date: 2021-02-26
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the entire speed control process, the engine 2 shakes a lot

Method used

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  • A method for controlling the idle speed of a hybrid electric vehicle engine
  • A method for controlling the idle speed of a hybrid electric vehicle engine

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] Please refer to figure 2 , figure 2 It is a flowchart of a control method in a specific embodiment of the present invention.

[0021] In a specific embodiment scheme, the control method of hybrid vehicle engine idle speed provided by the present invention comprises the following control steps:

[0022] A1: Start the engine, go to step A2.

[0023] A2: Judging whether the engine is started successfully, if the judging result is no, go to step A1 and...

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Abstract

The invention discloses a method for controlling the engine idle speed of a hybrid electric vehicle, which comprises the steps of controlling the engine idle speed according to the following control process when the driver needs the engine idle speed in the hybrid power creeping mode: controlling the engine to perform torque control; controlling the drive motor The speed control is carried out, and the target speed of the drive motor is the idle speed. Among them, the creeping mode refers to that the vehicle can move at a certain speed when the driver does not step on the brake or step on the accelerator after the vehicle is started. The speed control precision of the driving motor of the invention is about 60% higher than that of the traditional engine speed control, and has the advantage of stable engine idle speed control.

Description

technical field [0001] The invention relates to a control method for a power system of a hybrid electric vehicle, in particular to a control method for an engine idle speed of a hybrid electric vehicle. Background technique [0002] The 21st century is an era when human beings are confronted with energy bottlenecks and environmental challenges, and it will also be an era when automobiles are faced with technological innovation. The traditional automobile industry with oil as the main energy source will surely transform into a high-tech industry supported by new energy sources. It has gradually become the highlight of the development of the automobile industry. [0003] At present, the main power source of a hybrid electric vehicle is the drive motor and the engine. When the vehicle is idling in parallel, the engine and the drive motor are rigidly connected, and the engine performs speed control to drive the drive motor to rotate. [0004] If the moment of inertia of the mot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/06B60W10/08B60W20/15
CPCB60W10/06B60W10/08B60W2710/0666B60W2710/081B60W20/15Y02T10/62
Inventor 翟钧罗荣华肖波宁大伟
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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