Liquefied Petroleum Gas Engine Assembly with Flow Control

摘要

A liquefied petroleum gas (LPG) fuel assembly may include a fuel rail and a flow control mechanism. The fuel rail may have an inlet in communication with a pressurized LPG fuel source, an injection passageway in communication with the inlet 5 and a fuel injector that provides fuel to a combustion chamber of an engine, and an outlet in communication with the fuel injection passageway. The flow control mechanism may be in communication with the outlet of the fuel rail and a LPG fuel tank and may be operable in first and second modes. The second mode may provide a greater flow restriction than the first mode to control a fuel flow from the outlet of the 10 fuel rail to the fuel tank. SPEC-898173 doc Start Engine Startup InitiatdN Deliver Fuel From Tankl 102 To Rail Is Rail Temp > Operate Variable 110 Threshod N Orifice In Second Mode Operate Variable i106 Raink Pressure 12 Decrease Pump Work 114 Orifice In First Mode < Dakesure N &/Or Flow Restriction Adjust Flow Restriction 5108 To No Restriction imu ork = N Increase Pump Work 118 Adjust Flow Restriction 5120 To Partial Restriction Or Complete Restriction