Abstract: A rotary internal combustion engine includes a rotor with apex seals installed in slots which extend axially through apexes of the rotor. Each slot has stepped side walls which define an inner narrower slot portion and an outer wider slot portion. The portion are joined by a pair of outwardly facing ledges on both sides of the slot. Each apex seal has a outer head which includes a pair of overhanging or cantilevered lips. The width of the overhang is slightly larger than the width of the ledges so that seal-slot contact is made near the outer seal tip.

Abstract: A stratified charge rotary combustion engine includes a main fuel injector, a pair of spark plugs and a piot fuel injector. The first spark plug is located upstream of the pilot fuel injector. The second spark plug is located upstream of the main fuel injector and is located upstream of the center of the top-dead-center region of the housing.

Abstract: A turbocharged rotary internal combustion engine includes engine driven lube oil metering pump which provides controlled lube oil flow to the engine. A pneumatic actuator has a diaphragm exposed to turbo-boost pressure and connected to a control arm of the metering pump so that increase turbo-boost pressure increase the rate of lube oil flow.

Abstract: A fuel injection control valve has a housing with a high pressure fuel inlet, a fuel outlet and a spill passage. A spool is rotatably and slidably received in the housing. The spool has peripheral delivery and spill control recesses which control communication of fuel to the outlet and through the spill passage as the spool rotates. The width and depth of the recesses may be adjusted to achieve desired timing and flow rate control. The spool is threadably connected to a rotating drive shaft. The spool is movable axially to adjust the amount of fuel delivered for each spool rotation and can be rotated relative to the engine drive system to adjust injection timing.

Abstract: A rotary internal combustion engine includes a fuel intake port located in the periphery of the rotor housing near the air inlet end of the major axis of the two-lobed profile defined thereby. A rotary valve controls communication between the fuel intake port and a source of gaseous fuel such as natural gas. The valve includes a rotary valve member so that the communication is open between the source and the fuel intake port when rotor pockets are facing the intake port.

Abstract: A rotary engine has a substantially trochoidal-shaped housing cavity in which a rotor planetates. A cooling system for the engine directs coolant along a single series path consisting of series connected groups of passages. Coolant enters near the intake port, passes downwardly and axially through the cooler regions of the engine, then passes upwardly and axially through the hotter regions. By first flowing through the coolest regions, coolant pressure is reduced, thus reducing the saturation temperature of the coolant and thereby enhancing the nucleate boiling heat transfer mechanism which predominates in the high heat flux region of the engine during high power level operation.