승용차 ABS의 하이드로릭 유닛, 센서, 컴퓨터에 관련된 트라이볼로지적인 고장사례 고찰

Abstract

In this paper, we present our analysis of tribological failure examples for an anti-lock brake system(ABS) in a car. The study range of this paper is to improve the quality of ABS system by analyzing withsensor, computer, actuator and oil lines. In the first example, the brake leak from hydraulic supply line in a caliperon the rear left side of the ABS hydraulic modulator. This produces the sponge phenomenon, where the car doesnot brake even when the driver operates the brake pedal. The hydraulic unit operating ABS is actuator that playrole regulating drive condition according with the oil pressure supplied with wheel of a car. In the second example,the service man does not completely tighten the fixed bolt after repairing the car. This causes the ABS warninglamp to light up as the ABS wheel speed sensor cannot detect whether the ABS has been activated. In thethird example, the ABS electronic control unit is separated from the soldered part of the inner circuit board. Consequently,the ABS fails in control because the ABS motor pump receives no-signal for the hydraulic unit. Thewheel speed sensor has to large durability because of giving signal of acting condition to computer by detectedthe acceleration and deceleration of wheel of a car. In the fourth example, the ABS warning lamp lights up ofwhen cracks propagate in the circuit board soldering part. The circuit of this computer is very important part forinput and output the operating signal of system. Such failures can aggravate the durability of the ABS. Thus, theABS needs to be optimized to eliminate malfunction phenomenon.