Wire-control electro-hydraulic brake system and brake method

Abstract

The invention discloses a wire-control electro-hydraulic brake system and a brake method. The wire-control electro-hydraulic brake system comprises an electronic control unit, a hydraulic control unit, a brake control mechanism, a brake master cylinder assembly, a wheel brake assembly and a hydraulic circuit. According to the wire-control electro-hydraulic brake system and the brake method, an eccentric shaft motor and a plunger pump are used in cooperation with an energy accumulator to serve as a pressurizing mechanism, and a vacuum booster and an electric vacuum pump of a traditional brake system are replaced. The wire-control electro-hydraulic brake system and the brake method can achieve four brake methods, wherein the four brake methods are the conventional brake method, the failure spare brake method, the front-and-back-shaft brake force distribution brake method and the ABS anti-lock brake method, the methods can be used for electric vehicles to achieve coordinating regenerativebrake, and through coordinative controlling over the motor, the energy accumulator and all valves, switching of different brake functions is achieved. The wire-control electro-hydraulic brake systemis short in response time and high in hydraulic adjusting accuracy, expanding function and product integration degree, can improve the tolerance, the brake strength and the like of an active brake system, and can shorten the response time of the active brake system.

Description

technical field [0001] The invention relates to the technical field of vehicle braking, in particular to a wire-controlled electro-hydraulic braking system and a braking method. Background technique [0002] In the current car market, the braking system of most cars has been powered by the engine-driven vacuum booster pump for 40 years. The potential for reducing costs and improving functions under this principle is already very small. The market potential of pure electric / hybrid vehicles in the future is huge. While continuing to use the existing vacuum booster / electronic vacuum booster structure, OEMs urgently need a new type of brake-by-wire system that can not only reduce cost, size, and energy consumption, but also seamlessly cooperate to achieve braking energy recovery, auxiliary Braking, active braking and other advanced functions. [0003] The feature of the brake-by-wire structure is that the vacuum booster unit is eliminated, which not only saves installation spa...

AI Technical Summary

Problems solved by technology

Many OEMs and parts factories have conducted years of design and research on electronic hydraulic braking systems, and some products have also been mass-produced. However, due to reliability problems caused by frequent use of components such as high-pressure accumulators, accumulators The electronic hydraulic braking system has not been popularized, and many manufacturers are still looking for more perfect design solutions.

[0004] Chinese Patent No. CN 104828053 A, published on August 12, 2015, titled "An Energy-Saving Electro-hydraulic Braking System and Its Control Method", discloses an energy-saving electro-hydraulic braking system and its control method. The disadvantages are: (1) the system integration is low; (2) the pressure interference between the wheel brake wheel cylinder is more obvious; (3) the lack of pressure balance device

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