Design and feasibility analysis of a novel auto hold system in hydrostatic transmission wheeled vehicle

Abstract

Auto hold refers to vehicle's function of automatic braking under shutdown condition and automatic relieving braking force when vehicle starts. This paper presents a concrete structure of the novel auto hold system of hydrostatic transmission wheeled vehicle, and deeply analyses the working mechanism and control method. To validate its feasibility, AMESim software is adopted to establish the simulation model of the auto hold system based on mathematical theories. By using the data of a certain comprehensive operation mode as input, the curve of braking force of the auto hold system is obtained through simulation. It can be known through analysis that the proposed auto hold system can realize rapid response and provides stable braking force under different road conditions. Finally, the feasibility of the proposed auto hold system is validated by comparing the simulation data with actual braking force required and the electronic vehicle parking technology. It turns out that the auto hold system can meet the requirements of all road conditions. Besides, it also can provide a fault tolerance range for real vehicle experiments, and it will not cause adverse impacts due to excessive parking brake force.

Functional Model of an Automatic Vehicle Hold Based on an Electro-Hydraulic Braking System

“…The worm gear drives the gears and racks to raise the piston of the master cylinder, the brake fluid from the master cylinder goes through the pipeline into the wheel cylinder, which is then clamps to generate braking force, inducing the tire braking [13], to complete the process of a pressure building [14]. The autohold vehicle system proposed by Lv Chang presents a concrete structure for the novel auto-hold system of hydrostatic transmission wheeled vehicles and deeply analyses the working mechanism and control method [9]. Some scholars put forward the idea of using a ramp start to replace automatic parking.…”

“…The autohold vehicle system proposed by Lv Chang presents a concrete structure for the novel auto-hold system of hydrostatic transmission wheeled vehicles and deeply analyses the working mechanism and control method [9]. Some scholars put forward the idea of using a ramp start to replace automatic parking.…”

Simulation Analysis on the Distribution Valve Module of Locomotive Brake System Under Event Process Module

“…The current trains focus on the development of speed and bearing capacity, so they have higher and higher requirements for braking system. How to design a locomotive braking system that can not only shorten the braking distance of trains, reduce mechanical wear, but also realize the detection, display, and alarm of running faults is an urgent problem to be solved [2].…”