Abstract: A fuel supply system for an internal combustion engine continuously injects fuel into the intake air stream for each cylinder or other combustion zone. The fuel metering for each other combustion zone is performed by a metering unit individually serving that zone and responsive to a control pressure the value of which is dependent on various engine conditions so that the rate of fuel injection meets engine requirements. A cold idle feature provides an enhanced idle fuel rate of flow following start up of a cold engine. The system may be designed to retain system pressure for a long time after stopping the engine to prevent vapor lock and there are no atmospheric vents anywhere in the system so there are no evaporative emissions to contend with during running or shut down of the system.

Abstract: A variable displacement vane type hydraulic pump of simple construction automatically varies its output flow rate, between a maximum value and zero, in response to changes in the output pressure. The pump is characterized by a laterally shifting flow modulating member located in a central recess of a vane carrying rotor and whose lateral position is dictated by the pressure existing at the outlet port. The pump can run continuously at a no-flow condition without overheating or stalling and its rotor direction may be reversed by merely reversing the functions of its two ports.