INJECTOR CAVITATION DETECTION TEST

摘要

A method and apparatus for determining a characteristic of an injector are set forth. In one example, a compressed gas is applied to the inlet chamber of the injector while the spoolvalve is closed until the pressure of the compressed gas in the inlet chamber reaches a predetermined pressure. A change in pressure of the compressed gas in the inlet chamber is measured over time while the spool valve is closed. The pressure change measurement corresponds to the characteristic of the injector that is to be determined.

主权项

1. A method for determining a characteristic of an injector, wherein the injector includes an inlet chamber configured to receive a high-pressure hydraulic fluid that is directed from the inlet chamber to an intensifier chamber through a spool valve for actuating a piston, and an outlet passage configured to receive the hydraulic fluid from the intensifier chamber through the spool valve, the method comprising:
applying a compressed gas to the inlet chamber while the spool valve is closed until pressure of the compressed gas in the inlet chamber reaches a predetermined pressure; and measuring, over time, a change in pressure of the compressed gas in the inlet chamber, wherein the measurement takes place with the spool valve closed, and wherein the pressure change measurement corresponds to the characteristic of the injector that is to be determined.