Drive-by-wire hydraulic brake system using liquid high pressure source generator

Abstract

The invention discloses a drive-by-wire hydraulic braking system using a liquid high pressure source generator, and belongs to the technical field of vehicle drive-by-wire brake. The problems that a power assisting form of an existing brake system mostly depends on the vacuum degree of an engine, so that the existing brake system cannot be applied to an electric vehicle; when parts of drive-by-wire brake systems adopt a motor to assist power and brake a main cylinder or an auxiliary main cylinder directly, noise is large, and the responding speed is low; when the parts of drive-by-wire brake systems adopt the motor to drive a pump to supply liquid to a high pressure energy accumulator, damage to the braking system by pulsation with internal pressure is large, and the life of the high pressure energy accumulator is limited, so that frequent replacing is required are solved. The drive-by-wire hydraulic brake system is a mechanical device which uses electromagnetic force to drive a pistonto move and continuously produce the high pressure brake fluid, so that the drive-by-wire brake system is free from shackle of a vacuum power booster, the motor, the pump and the high pressure energyaccumulator, the structure is simpler, the integration degree is higher, and meanwhile the drive-by-wire brake system has the functions of fast active pressure buildup, accurate pressure adjusting, low vibration noise, failure protection, full decoupling of pedal force and the like.

Description

technical field [0001] The invention belongs to the technical field of automotive brake-by-wire. Background technique [0002] The improvement of the braking system in the prior art mainly lies in the energy source of the system. Since the entire braking system has no external energy support, it is difficult to meet the braking force required by the braking system only by the braking force of the driver pedaling, so it is necessary to provide a braking energy source for the braking system. The most common Add a vacuum booster to the brake master cylinder, and use the vacuum of the engine to boost the braking system. Due to its simple structure and stable performance, it has dominated the braking system industry for many years. With the development of new energy vehicles and smart vehicles, new requirements are put forward for the automotive braking system: to reduce and cancel the dependence on engine vacuum; so it is necessary to find new energy sources for the braking sys...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the following technical problems existing in the prior art: first, the existing brake system mostly depends on the vacuum degree of the engine so that the brake system cannot be applied to electric vehicles; The main cylinder or auxiliary master cylinder has problems such as high noise and slow response speed; third, when some wire-controlled brake systems use a motor to drive a pump to charge the high-pressure accumulator, the pressure pulsation inside the system will harm the brake system. Large, and the life of the high-pressure accumulator is limited, and it needs to be replaced frequently

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