Patent ID: 7950267
Filing Date: 2011-05-31
Classification: F02M

Abstract:
1. A method of testing an LPG injector with an injector test system, the injector test system including an LPG fuel source in fluid communication with an input to the LPG injector, a fuel canister in fluid communication with an output of the LPG injector, a canister pressure sensor, a canister temperature sensor, and a control system, the method comprising: activating the injector between an open state and a closed state in a plurality of cycles; determining a change in pressure in the canister with the pressure sensor; determining a temperature in the canister; determining a total mass of fuel in the canister using the determined change in pressure, the determined temperature, a gas constant for LPG, and a volume of the canister; and determining a mass of LPG injected by the injector during each cycle.