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.
CN113696871BActive Publication Date: 2022-04-29DONGFENG MOTOR GRP
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DONGFENG MOTOR GRP
Publication Date
2022-04-29

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More