A vacuum source control method and system for a hybrid vehicle

A technology of a hybrid vehicle and a control method, applied in the directions of brakes, vehicle components, brake transmission devices, etc., can solve the problem of high cost, and achieve the effect of reducing braking cost and improving power economy.

Active Publication Date: 2022-04-29
DONGFENG MOTOR GRP
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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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  • A vacuum source control method and system for a hybrid vehicle
  • A vacuum source control method and system for a hybrid vehicle
  • A vacuum source control method and system for a hybrid 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 vehicle. The method is applied in a pure electric mode, and includes the steps: The relationship between them sends a start-stop signal to control the start and stop of the fuel engine; when the fuel engine starts, it drives the mechanical vacuum pump to extract the gas in the vacuum booster cavity to change the vacuum degree of the gas in the vacuum booster cavity. The system includes a vehicle controller, a fuel engine and a mechanical vacuum pump. The invention can solve the problem that the hybrid electric vehicle cannot drive the mechanical vacuum pump to work when the engine does not work in the pure electric working mode.

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 Patents(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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