Vacuum boosting device of electric vehicle

Abstract

The invention discloses a vacuum boosting device of an electric vehicle. The vacuum assisting device comprises a braking pedal, a vacuum booster, a brake main cylinder, an electric vacuum pump, a vacuum energy accumulator and an electronic control device; the brake main cylinder is connected with the brake pedal through the vacuum booster and the vacuum booster is also connected with the vacuum energy accumulator and the electric vacuum pump; the electric vacuum pump is electrically connected with the electronic control device and the electronic control device is also connected with a vacuum pressure sensor and an atmosphere pressure sensor; the vacuum pressure sensor is installed on the vacuum energy accumulator and the atmosphere pressure sensor is connected with the outside air. The vacuum degree in the vacuum energy accumulator is measured by using the vacuum pressure sensor and the outside atmosphere pressure is measured by using the atmosphere pressure sensor; after the vacuum degree and the outside atmosphere pressure are measured, sensor signals are sent to the electronic control device and actions of the electric vacuum pump are adjusted and controlled through comparing the sensor signals by the electronic control device, so that the boosting device can be used in areas with low altitudes and also can be normally used in areas with high altitudes.

Description

technical field [0001] The invention relates to a vacuum booster, in particular to a vacuum booster for an electric vehicle. Background technique [0002] At present, conventional vehicles are basically equipped with brake boosting devices, especially in small and medium displacement vehicles, vacuum boosting brake devices are generally used. For gasoline engine vehicles, the pressure difference between the vacuum degree and the atmospheric pressure generated in the intake manifold when the engine is working, that is, the pressure difference on both sides of the diaphragm in the vacuum booster, is used to help push the piston of the brake master cylinder. , to reduce the driver's brake pedal force. For diesel engine vehicles, the diesel engine is generally used to drive the vacuum pump through a belt to generate a vacuum boosting effect during operation. For electric vehicles, the motor itself cannot generate a vacuum negative pressure; and the speed of the driving motor i...

AI Technical Summary

Problems solved by technology

The vacuum booster pump that works normally in plain areas will cause problems such as reduced service life and increased noise due to frequent use in plateau areas.

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