Control method and storage medium of vacuum booster system

Abstract

The invention provides a control method and a storage medium of a vacuum boosting system. The vacuum boosting system obtains the vacuum pressure value in the system, and then sequentially judges whether the vacuum pressure value reaches the first preset threshold and the second preset threshold. After the second preset threshold, the vacuum pump enters the self-learning mode, according to the state of the brake pedal and the pressure difference of the vacuum pressure value per unit time, to detect the saturation of the vacuum pressure value and obtain the second preset threshold of the vacuum pump The current first preset threshold of the vacuum pump is acquired by querying the correspondence table of the first / second preset threshold of the vacuum pump. The invention automatically adjusts the learning mode of the preset threshold by the booster system to detect the saturation of the vacuum booster system in real time, and effectively realizes seamless transition from low altitude to high altitude, and from high altitude to low altitude. On the premise of achieving cost reduction, it solves the problems of micro-leakage of the vacuum booster system and other problems that cause the vacuum degree to fail to reach the predetermined value.

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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