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Engine start control method after automatic halt of hybrid power vehicle

A hybrid vehicle and engine controller technology, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve problems such as poor starting smoothness, achieve poor smoothness, eliminate flameout failures, and improve starting. the effect of success

Active Publication Date: 2015-05-20
SAIC MOTOR
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Problems solved by technology

[0006] In view of this, the purpose of the present invention is to provide a method for controlling the engine start after the automatic shutdown of the hybrid electric vehicle, to solve the technical problem of poor starting smoothness after the automatic shutdown of the engine, and to improve the success of starting, and at the same time Eliminate the flameout failure of the engine in some special cases

Method used

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  • Engine start control method after automatic halt of hybrid power vehicle
  • Engine start control method after automatic halt of hybrid power vehicle
  • Engine start control method after automatic halt of hybrid power vehicle

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Embodiment Construction

[0067] In this paper, the term "electric creep start mode" means that when the hybrid electric motor and the high-voltage battery are in normal working condition, the available discharge power of the high-voltage battery and the SOC of the high-voltage battery can enable the hybrid electric motor to start by electric drive. Drive the car until the engine injects ignition and works stably.

[0068] The term "electric creep start control" refers to basically using the drive torque of the hybrid electric motor to control the engine speed during the process of dragging the engine by the starter motor connected to the engine until the engine starts to inject fuel and ignite to stabilize the work.

[0069] The term "high-speed start control" refers to the engine start control process that is different from the traditional vehicle's engine start control process that only controls the engine to start fuel injection and ignition when the starter motor connected to the engine drags the e...

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Abstract

The invention relates to an engine start control method after automatic halt of a hybrid power vehicle. The engine start control method comprises the steps of: A, after the hybrid power system enters an automatic halt control mode, judging whether according with a start condition, if not, continuously keeping the automatic halt control mode, if yes, carrying out start control to start the hybrid power system; and B, further judging whether according with an electric crawling start model, if yes, executing the electric crawling start control, if not, executing high-speed rotating speed start control, wherein the electric crawling start mode means that under the condition that the hybrid power motor and a high-voltage battery are in a normal work state, the high-voltage battery can ensure that the hybrid power moor drives the vehicle in an electric drive manner until the engine is ignited through spraying oil and stably works by using a discharge power and high-voltage battery state of charge (SOC). By applying the invention, the engine start smoothness after the automatic halt of the hybrid power vehicle can be improved, the start success rate can be increased, and flameout accidents of the engine, caused by some special conditions, can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicle control, in particular to an engine start control method after the hybrid electric vehicle automatically stops. Background technique [0002] In the prior art, a hybrid power system with a start-stop function usually adopts a high-speed start mode when starting after an automatic stop. However, the smoothness of a high-speed start is not easy to control, so it is necessary to improve the automatic stop. Start smoothness problem. [0003] Disclosed in the Chinese Patent Publication No. CN101121407 is the patent literature of a kind of engine start control method of strong hybrid electric vehicle, has described in this method how to carry out engine start control under pure electric working condition, and when vehicle is stationary and is cold How to use the starter and the high-power motor to start the engine together in the engine state. [0004] In addition, the Chinese Patent P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W20/00B60W10/06B60W10/08B60W40/10
CPCY02T10/62
Inventor 张君鸿周宇星邱国茂蒋新华李卓阳梁海波丁阳
Owner SAIC MOTOR
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