A study on service life restoration of control valve for a small diesel common rail injector

초록

This study aims to develop a technology to restore the remanufacturing performance by processing the worn parts of a small diesel injector control valve. In order to restore the performance of the control valve, cutting and grinding processes are applied at the maintenance and adjusting processes in remanufacturing. An exclusive grinding machine and a zig are designed and developed in order to restore the needle valve inclined plane, which is 83° in this work. The end of the needle valve is cut by 0.1 ~ 0.2 mm during the restoration process and then the coating process is applied. In this study, restored control valve performance is evaluated similar to that of the new one due to the existing DLC coating method through the injector performance test. Copyright 2018 KSAE / 155-11.

키워드