Redundancy vacuum boost system for electric car braking based on dual electric vacuum pumps

Abstract

The invention provides a redundancy vacuum boost system for electric car braking based on dual electric vacuum pumps and belongs to the technical field of electric car braking. The solution comprisesa two-position three-way electromagnetic valve, a check valve, an electronic control unit, a vacuum tank, a vacuum degree sensor, a vacuum boost device, a storage battery, the two electric vacuum pumps, two relays and other components, wherein connection between the components is classified into air channel connection and circuit connection. When the electronic control unit judges that the first electric vacuum pump fails according to a vacuum degree value of the vacuum tank output by the vacuum degree sensor and working time of the electric vacuum pump, the electronic control unit can make the second electric vacuum pump work by controlling the two-position three-way electromagnetic valve, so working reliability of the vacuum boost system of an electric car can be enhanced; and braking safety of the electric car can be effectively enhanced; and in particular, braking efficiency of emergent braking can be increased.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle braking, and in particular relates to a redundant vacuum booster system for electric vehicle braking based on dual electric vacuum pumps. Background technique [0002] With the gradual increase in the number of motor vehicles, environmental pollution and lack of oil resources are becoming more and more obvious. Because of the advantages of green environmental protection and high energy utilization efficiency of electric vehicles, countries all over the world are actively researching electric vehicles that can replace traditional vehicles; At the same time, electric vehicles have become an important direction of my country's automobile development. [0003] With the improvement of people's requirements for the safety and comfort of automobile braking, similar to traditional vehicles, the vacuum booster braking system is also a must-installed equipment for electric vehicles, but the differen...

AI Technical Summary

Problems solved by technology

[0004] The electric vacuum pump is one of the key components of the electric vacuum booster system. It is also a new component compared with the traditional vacuum booster system. It is also a component that is prone to failure in the electric vacuum booster system. will disappear, and at this time it will lead to insufficient power assistance. In case of emergency braking, the braking efficiency will be too low and the braking distance will be too long, which will affect driving safety.

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