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Vacuum source control method and system for hybrid electric vehicle

A technology of hybrid electric vehicle and control method, which is applied in the direction of brakes, vehicle parts, braking transmission devices, etc., can solve the problem of high cost, achieve the effect of reducing braking cost and improving power economy

Active Publication Date: 2021-11-26
DONGFENG MOTOR GRP
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The embodiment of the present invention provides a vacuum source control method and system for a hybrid vehicle to solve the problem in the related art that the brake of a hybrid vehicle uses an electric vacuum pump and the cost is relatively high

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  • Vacuum source control method and system for hybrid electric vehicle
  • Vacuum source control method and system for hybrid electric vehicle
  • Vacuum source control method and system for hybrid electric vehicle

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Embodiment Construction

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0037] An embodiment of the present invention provides a method for controlling a vacuum source for a hybrid vehicle, which is characterized in that it is applied in a pure electric mode, and includes the steps of:

[0038] S100: The vehicle controller sends a start-stop signal according to the relationship between the gas vacuum in the vacuu...

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Abstract

The invention relates to a vacuum source control method and system for a hybrid electric vehicle, the method is applied to a pure electric mode, and the method comprises the following steps: a vehicle control unit sends a start-stop signal according to the relationship between the gas vacuum degree in a cavity of a vacuum booster and a preset vacuum degree threshold value so as to control a fuel engine to start and stop working; and when the fuel engine is started, the mechanical vacuum pump is driven to extract gas in the cavity of the vacuum booster, so that the vacuum degree of the gas in the cavity of the vacuum booster is changed. The system comprises a vehicle control unit, a fuel engine and a mechanical vacuum pump. The problem that the engine does not work and the mechanical vacuum pump cannot be driven to work when the hybrid power vehicle is in a pure electric working mode can be solved.

Description

technical field [0001] The invention relates to the technical field of engine braking systems, in particular to a vacuum source control method and system for a hybrid vehicle. Background technique [0002] At present, the main function of the vacuum source in the braking system of passenger cars is to extract vacuum to provide boost for the vacuum booster, so that the driver can provide sufficient braking strength with a small pedal force. Vacuum sources are generally divided into three structures: intake manifold, electric vacuum pump and mechanical vacuum pump. The intake manifold type mainly provides vacuum through the negative pressure of the engine manifold, and the vacuum degree is greatly affected by the operation of the engine; the electric vacuum pump controls the opening and closing of the circuit through a specific control strategy to achieve vacuum extraction, and the cost is relatively high; the mechanical vacuum pump is mounted on the On the engine, the vacuum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T13/72B60T13/52
CPCB60T13/72B60T13/52
Inventor 陈世荣闫涛卫张健曾渊侯瑾
Owner DONGFENG MOTOR GRP
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