| 摘要 |
A gaseous fuel direct injection fuel system (10) for a reciprocating piston internal combustion engine of a vehicle comprises a fuel tank (13) for receiving a gaseous fuel, a fuel injector (20) calibrated for sonic flow and controlled by.an electronic control unit (ECU) which controls the duration of the opening of the injector (20), as well as the points in the engine operating cycle at which the injector (20) is opened and closed. The ECU receives input signals from various sensors providing information relating to the operating conditions of the engine and, driver demands and determines the differential pressure across a fuel injector (20) to ascertain the occurrence of a condition corresponding to sub-sonic flow therethrough, and operates the fuel injector as a function of the differential pressure during the occurrence of the sub-sonic flow condition to compensate for the, sub-sonic flow condition. |
