Four Way Safety Valve Tester Design for Heavy Vehicle Brake Systems

Abstract

In our country, tractors are required to undergo a periodic physical ex-amination every three years after the first three years, cars and motorcy-cles every two years after the first three years, and heavy and light com-mercial vehicles every year after the first one. In the physical examina-tions of vehicles, vehicle description, lighting system, brake system, steering system, superstructure, etc. many systems and parts are checked. Although the vehicles use braking systems of various types and different technologies, the main purpose is to provide safe, slow driving and stop-ping of vehicles in traffic. Air braking systems are used in vehicles with heavy loads carrying cargo and passengers. In the event of any leakage that may occur in the brake system during the cruise, the part called Four-way Safety Valve is used in order to eliminate the possibility of the air tanks emptying and the vehicle to be left without brakes. Its task is to prevent the parking brake, front axle and rear axle brakes from being stored in separate air tanks and preventing the leak line from affecting solid lines in the event of an air leak. Air brake system Four-way safety valve test is carried out during the physical examination of vehicles. In this study, it is aimed to automate the manual safety valve test using a microcontroller card, solenoid valve, pressure transmitter and PC soft-ware. Thanks to the test device and software to be developed, it will be ensured to eliminate non-ergonomic movements performed by the tech-nician during the test, increase the reliability of the test and eliminate the environmental polluting elements during the test.