Servo brake cylinder used for distributed composite brake system, distributed composite brake system adopting servo brake cylinder and brake method of distributed composite brake system adopting servo brake cylinder

Abstract

The invention discloses a servo brake cylinder used for a distributed composite brake system, the distributed composite brake system adopting the servo brake cylinder and a brake method of the distributed composite brake system adopting the servo brake cylinder. The servo brake cylinder comprises a shell body, an electromotor, a coupler, a ball screw assembly composed of a nut and a lead screw, abearing, a retainer ring, a piston, a cylinder body and a return spring, wherein an inner hole is formed in the center of the piston, the inner hole comprises a tapered first conical surface, a cylindrical surface and a gradually-expanded second conical surface, the left end of the lead screw extends in the axial direction to sequentially form a tapered third conical surface, a cylindrical surfaceand a gradually-expanded fourth conical surface, the first conical surface cooperates with the fourth conical surface to form an output valve, and the second conical surface cooperates with the thirdconical surface cooperate to form an input valve. According to the servo brake cylinder used for the distributed composite brake system, the distributed composite brake system adopting the servo brake cylinder and the brake method of the distributed composite brake system adopting the servo brake cylinder, the advantages of being compact in structure, flexible in control, high in braking response, high in braking pressure control precision, reliable in failure protection capability, low in manufacturing cost and the like are achieved, so that an intelligent driving automobile is good in motion stability and high in reliability during braking.

Description

technical field [0001] The invention belongs to the technical field of automobile brake systems, and in particular relates to a servo brake cylinder, a brake system and a brake method for a distributed compound brake system. Background technique [0002] In recent years, smart cars have received unprecedented attention and attention. The world's major automobile producing countries and even some countries without an automobile industry have planned and supported the networking and intelligent driving of automobiles as an important strategic direction. According to the division of the International Society of Automotive Engineers, intelligent driving vehicles are divided into five levels, namely, driver assistance (level 1), partial automation (level 2), conditional automation (level 3), high automation (level 4) and full automation (level 4). Level 5). As far as braking systems are concerned, all levels of intelligent driving require the car to have autonomous braking, whi...

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Problems solved by technology

[0008] In order to solve the above-mentioned problems of the prior art, an object of the present invention is to propose a servo brake cylinder for a distributed compound brake system; another object of the present invention is to propose a distributed brake cylinder using a servo brake cylinder Composite braking system; Another object of the present invention is to propose a braking method for a distributed composite braking system using a servo brake cylinder to solve the problem of uncompact structure of the braking system and slow braking response in the autonomous driving mode. Problems such as low braking pressure control accuracy, high manufacturing cost, and unreliable failure protection capability

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