Vacuum booster online idle stroke detection device

Abstract

The invention relates to the technical field of automobile parts, and provides a vacuum booster online idle stroke detection device. The detection device includes an installing rack which serves to install a vacuum booster and brake pump assembly, an air pump, a vacuum pump and an air pressure detection device. The vacuum booster and the brake pump assembly has a main cylinder oil outlet which is communicated with the air pump via a first ventilation pipe. The main cylinder oil inlet opening is communicated with the air pressure device via a second ventilation pipe. The vacuum booster is communicated with the vacuum pump via a third ventilation pipe. The detection device also includes a displacement detection device which detects displacement of a booster push rod of the vacuum booster. According to the invention, the air pump and the air pressure detection device are added, which spares a liquid storage pot and an entire brake system and reduces the amount of parts for detection and assembling. The detection device has an easy installation method, spares the workflow of cleaning brake fluid after assembling, saves working procedure and increases production efficiency.

Description

technical field [0001] The invention belongs to the technical field of auto parts, and in particular relates to an online idle travel detection device for a vacuum booster. Background technique [0002] Vacuum booster with brake master cylinder assembly is widely used in hydraulic braking systems. Its important function is to amplify the force exerted by the driver and passengers on the pedal by a certain multiple, and convert the mechanical force into the pressure of the liquid, thereby transmitting To the brake, a braking torque is generated to stop the vehicle. The product performance of the vacuum booster directly affects the braking effect of the braking system, such as the requirements of the idle stroke (the idle stroke generally refers to the movement of the booster push rod to the oil inlet of the master cylinder under normal vacuum conditions). When it is closed, the moving distance of the push rod is the idle stroke), if the idle stroke is too small, it will easi...

AI Technical Summary

Problems solved by technology

This kind of testing equipment, because it is a comprehensive testing bench, has many testing items, it needs to build the whole bench completely, install the whole hydraulic brake system and the liquid storage pot together, there are many parts, and the fixed installation method It is complicated, and the brake fluid needs to be cleaned after the detection. There are many procedures, which is not conducive to the rapid detection online; at the same time, because the brake fluid needs to enter the master cylinder before the detection can be performed, the brake fluid after detection is often not completely cleaned. The performance of rubber parts such as leather cups will be affected and its service life will be reduced

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