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A hybrid electric vehicle engine start control method, system and vehicle

A hybrid vehicle, engine starting technology, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve problems such as engine resonance

Active Publication Date: 2022-04-29
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a hybrid vehicle engine start control method, system and vehicle, which are used to solve the problem of resonance in the actual engine start process

Method used

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  • A hybrid electric vehicle engine start control method, system and vehicle
  • A hybrid electric vehicle engine start control method, system and vehicle
  • A hybrid electric vehicle engine start control method, system and vehicle

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Embodiment Construction

[0043] In this patent, when the engine is starting, the system is judged to be in resonance, and the engine is restarted after the engine is shut down by increasing the engine starting target speed. The specific implementation will be further described below in conjunction with the accompanying drawings and examples.

[0044] Such as figure 1 As shown, the embodiment of the present invention provides a hardware structure applicable to a method for controlling engine starting of a hybrid electric vehicle, and the hardware structure includes a generator 1, a generator controller 2, a vehicle controller 3, an engine controller 4, and an engine 5 , crankshaft speed and position sensor 6, torsional shock absorber or dual-mass flywheel 7, and generator speed and resolver position sensor 8; the output shaft of engine 5 is connected to the input shaft of generator 1 through torsional shock absorber or dual-mass flywheel 7; The rotational speed of generator 1 is detected by generator c...

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PUM

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Abstract

The invention provides a hybrid vehicle engine start control method, system and vehicle. The method includes the vehicle controller determining that the engine needs to be started, and controlling the output torque of the generator to drag the engine. When the engine reaches the starting target speed, the engine The controller executes the fuel injection ignition start; the generator controller calculates the change of the generator speed in real time, and records the peak and valley of the generator speed; in any preset time period, the absolute value of the generator speed peak exceeds the preset peak value and the generator The absolute value of the speed trough exceeds the sum of the preset peak values; judge whether it is greater than the preset number of times threshold; when it is greater than the preset number of times threshold, the vehicle controller controls the engine to stop freely; the vehicle controller increases the starting target according to the preset step size Rotate speed, increase the torque according to the starting target speed until the working speed of the engine reaches the speed of the successful start mark. The invention solves the problem of engine damage caused by resonance during engine starting.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a method and system for controlling engine start of a hybrid electric vehicle. Background technique [0002] In a gasoline-electric hybrid vehicle, the generator shaft is generally connected to the generator shaft through a spline or a transmission gear, which can realize the starting of the engine and the power generation of the generator. The flywheel is used to balance the power output fluctuation of the engine; the engine output shaft has a speed sensor, and the generator can calculate the generator speed through the resolver position. Due to various reasons such as long-term standing at low temperature and engine misfire, the resonance speed may deviate from the reference resonance speed, resulting in resonance during the actual engine starting process, which will cause damage to the engine shafting and vehicle quality. Contents of the invention [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W20/50B60W10/06B60W10/08
CPCB60W20/50B60W10/06B60W10/08B60W2510/0638B60W2510/081B60W2710/0616B60W2710/083Y02T10/62
Inventor 朱永明周文太苏建云魏丹邹海斌
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD