METHOD OF TUNING HYDRAULICALLY-ACTUATED FUEL INJECTION SYSTEMS BASED ON ELECTRONIC TRIM

摘要

A method for adjusting the on-time of each hydraulically-actuated fuel injector (10) within a hydraulically-actuated fuel injection system (60) is disclosed. At least two spray tests are performed on the fuel injector (10) prior to its installation in a fuel injection system (60). The fuel injector is marked with a bar-code (100) capable of representing these results. Immediately prior to installing the fuel injector (10) into the fuel injection systeme (60), the bar-code (100) on the fuel injector (10) is scanned and the results of the spray tests are stored in a memory unit accessible to the electronic control module (61). These results are used to develop a unique electronic trim solution for the fuel injector (10). The performance of the fuel injector (10) is then adjusted using the electronic trim solution to enable the performance of the fuel injector (10) to approach that of a nominal injector.