Electric power-assisted brake system capable of realizing partial decoupling without feedback disc

Abstract

The invention discloses an electric power-assisted brake system capable of realizing partial decoupling without a feedback disc. The electric power-assisted brake system capable of realizing partial decoupling without the feedback disc comprises a first gear, a second gear, a power-assisted motor, a power-assisted pressure establishing cylinder, a brake main cylinder, a liquid storage tank, a hydraulic control unit and an electric control unit, wherein the power-assisted motor is connected with the first gear and drives the first gear to rotate; the first gear is engaged with the second gear and drives the second gear to synchronously rotate; a lead screw is screwed in the middle of the second gear; the second gear drives the lead screw to move from left to right in the rotating process; apedal push rod is inserted in the front end of the brake main cylinder; the pedal push rod can push a second piston to move; the hydraulic control unit and the power-assisted motor are both connectedwith the electric control unit; and the electric control unit controls the power-assisted motor and the hydraulic control unit to work. The electric power-assisted brake system capable of realizing partial decoupling without the feedback disc has the beneficial effects that functions of active braking, failure backup, brake energy recovery and the like can be implemented, and active control technologies such as an electronic stabilizing program can also be effectively integrated to realize vehicle intelligent control.

Description

[0001] The invention relates to an electric power-assisted braking system, in particular to an electric power-assisted braking system with no feedback disk and partial decoupling. Background technique [0002] At present, the electrification and intelligentization of automobiles have become an important development trend in the future automobile field. This change puts forward higher requirements for the automobile braking system, not only requiring the braking system to provide reliable braking safety and sufficient Braking efficiency must also be able to cooperate with regenerative braking to maximize the recovery of braking energy and improve the cruising range of hybrid electric vehicles and pure electric vehicles, and the braking response must be fast enough, with sufficient active braking capacity, braking Accurate pressure control can be used as the underlying actuator of the intelligent driving assistance system while improving safety. At the same time, it must ensure a...

AI Technical Summary

Problems solved by technology

[0004] However, most of the current electric power-assisted braking systems use the feedback disc to couple the driver's pedal force and the motor assist. When designing the control algorithm, the deformation of the inner and outer rings of the feedback disc must be considered, which makes the control algorithm complex; in addition, the structure of the feedback disc must be realized. Servo assist requires the pedal travel sensor to measure the displacement difference between the inner and outer rings of the feedback disc, which makes it difficult to arrange the pedal travel sensor, and even requires two displacement sensors, which is costly and difficult to arrange on a real vehicle

[0005] Some electric power-assisted braking systems adopt a completely decoupling scheme, which generally requires multiple solenoid valves for decoupling and pedal feel adjustment. The electronic control unit ECU needs to precisely control multiple solenoid valves, resulting in the entire hydraulic brake It is difficult to control the dynamic system, and there is a certain gap between the simulated driver's pedal feel and the traditional pedal feel

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