Control method of vacuum boosting system and storage medium

Abstract

The invention provides a control method of a vacuum boosting system and a storage medium. The vacuum boosting system acquires a vacuum pressure value in the system; whether the vacuum pressure value reaches a first preset threshold value and a second preset threshold value or not is sequentially judged; and after the vacuum pressure value reaches the second preset threshold value, a vacuum pump enters a self-learning mode, the saturation of the vacuum pressure value is detected according to the brake pedal state and the pressure difference value of the vacuum pressure value in unit time, the second preset threshold value of the vacuum pump is obtained, and the current first preset threshold value of the vacuum pump is obtained by inquiring a corresponding relation table of the first presetthreshold value and the second preset threshold value of the vacuum pump. The learning mode of the preset threshold value is automatically adjusted through the boosting system, so that the saturationdegree of the vacuum boosting system is detected in real time, and seamless connection from the low altitude to the high altitude and from the high altitude to the low altitude is effectively achieved. On the premise of reducing the cost, the problem that the vacuum degree of a vacuum boosting system cannot reach a preset value due to trace air leakage and other factors is solved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle control, and in particular relates to a control method and a storage medium of a vacuum booster system. Background technique [0002] With the development of society and economy, new energy vehicles use clean energy, reduce pollution emissions, and conform to the concept of green travel, making more and more people choose new energy vehicles as a tool for travel. While the domestic new energy vehicle industry is developing rapidly, how to reduce production costs has become a new problem faced by major OEMs in the current environment under the trend of gradually reducing the country's subsidies for new energy vehicles. [0003] The current electric vehicles generally use a vacuum booster system, including a vacuum pump, a vacuum tank, a vacuum booster, a vacuum pipeline, and an atmospheric pressure sensor. The vacuum pump provides a vacuum source for the vacuum booster system, and is conne...

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a control method and a storage medium of a vacuum booster system, which are used to solve the problem that the vacuum booster system is easily affected by the atmospheric pressure sensor and cause damage to the car, and at the same time reduce production costs

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