06
2021
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08
What is the function of a car vacuum pump?
The function of the automotive vacuum pump is to generate negative pressure, thereby increasing braking force. For vehicles driven by diesel engines, since the engine uses compression ignition (CI), it cannot provide the same level of vacuum pressure at the intake manifold, so a vacuum pump that provides a source of vacuum needs to be installed.
The role of the automotive vacuum pump is to generate negative pressure, thereby increasing braking force. For vehicles driven by diesel engines, since the engine uses compression ignition (CI), it cannot provide the same level of vacuum pressure at the intake manifold, so a vacuum pump that provides a vacuum source needs to be installed.
The function of the automotive vacuum pump
The working principle of the automotive vacuum pump is that for vehicles equipped with gasoline engines, the engine generally uses spark ignition, which can generate a relatively large vacuum pressure at the intake manifold. This can provide sufficient vacuum source for the vacuum-assisted braking system. However, for vehicles driven by diesel engines, because their engines use compression ignition, they cannot provide the same level of vacuum pressure at the intake manifold, which necessitates the use of a vacuum pump that can provide a vacuum source. Additionally, engines designed to meet certain automotive emission and environmental requirements also require it to provide sufficient vacuum source to ensure the vehicle can operate normally.
The main output of the vacuum pump is the pressure generated by the power servo system. However, when it cannot function properly, the hydraulic system can still be driven manually to provide assistance. The vacuum-assisted braking system can also be called the vacuum servo system. The automotive braking system used in daily life mainly relies on hydraulic transmission as the medium. Compared to a pneumatic braking system that can provide power, it requires a resistance system to assist the driver's braking.
The automotive vacuum pump mainly utilizes the vacuum generated by the engine during operation to provide sufficient assistance when the driver steps on the brake, making it easier for the driver to apply the brakes. However, once the vacuum pump is damaged, it lacks a certain level of assistance, making the brake feel heavier when pressed. Additionally, the braking effect will also decrease, and sometimes it may even fail, indicating that the vacuum pump has been damaged.
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