Abstract
This paper presents a wheel cylinder pressure control algorithm for application to the vehicle electronic stability control (ESC) systems for commercial trucks. An ESC system is an active system that improves the driving stability by distributing the appropriate braking pressure to each wheel, which is an essential system for safe driving. It is important that the ESC system, through proper braking pressure supply, delivers the correct pressure under control. However, to reduce the cost involved, commercial trucks use a solenoid valve of the on/off-type, rather than a proportional valve that has good pressure control capability. The performance of a proposed wheel pressure control system based on an on/off solenoid valve control was verified by means of experiments conducted using the wheel pressure control algorithm presented in this paper.
Highlights
Serious vehicle accidents causing large-scale damage tend to occur because of the involvement of trucks that are heavier than typical passenger vehicles
An electronic stability control (ESC) system stabilizes the movement of a vehicle by being activated when a driver loses his/her control of the vehicle, and the difference between the calculation of the yaw rate in a high-level electronic controller unit (ECU) and the real yaw rate exceeds a certain threshold [4,5,6]
The effectiveness of ESC systems has been verified statistically using the U.S National Highway Traffic Safety Administration (NHTSA) vehicle crash data, which shows that ESC systems can reduce passenger vehicle crashes by 34% and sport utility vehicle (SUV) crashes by 59%, and can significantly reduce rollover accidents [7]
Summary
Serious vehicle accidents causing large-scale damage tend to occur because of the involvement of trucks that are heavier than typical passenger vehicles. The pressure control method proposed in the literature [12,13] was applied to the ABS system of a truck, which transmits the pressure provided by the air reservoir to a wheel cylinder. The proportional valves typically perform well in precisely controlling the target pressure transmitted from a high-level ECU of a truck. This study proposes a pressure control algorithm that uses an on/off-type solenoid valve and is applied to the ESC system of a commercial truck.
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