Abstract: For a pilot fuel ignited stratified charge rotary, internal combustion engine, the fuel injection system and a fuel injector therefor comprises a fuel injector having plural discharge ports with at least one of the discharge ports located to emit a "pilot" fuel charge (relatively rich fuel-air mixture) into a passage in the engine housing, which passage communicates with the engine combustion chambers. An ignition element is located in the passage to ignite the "pilot" fuel (a relatively rich fuel-air mixture) flowing through the passage. At least one other discharge port of the fuel injector is in substantially direct communication with the combustion chambers of the engine to emit a main fuel charge into the latter. The ignited "pilot" fuel-air mixture, when ignited, flashes into the combustion chambers to ignite the main, relatively lean, fuel-air mixture which is in the combustion chambers.

Abstract: A multi-unit rotary combustion engine in which at light loads the engine can be operated on only some of the units with those units having side intake ports and with the other units having peripheral intake ports.

Abstract: The built-up mainshaft has a plurality of eccentric elements secured to an elongated shaft element in end-to-end angular off-set relationship to each other. Each of the eccentric elements has integral cylindrical body and axially extending sleeve-like portions and an axially extending bore therethrough to receive therein the elongated shaft element. Each eccentric element is scored to render the cylindrical body portion thereof deformable in an inward direction toward the shaft element. A clamping means is provided for each eccentric element to coact with the scoring to effect deformation of the associated cylindrical body portion and secure the latter in torque transmitting relationship with the shaft element.

Abstract: A rotary engine in which the engine is provided with leakage grooves in its trochoid surface so that high pressure combustion gases from a working chamber in its expansion phase can flow back into a chamber at an initial portion of its compression phase so as to increase the resulting temperature and pressure of the compression phase sufficient for Diesel operation.

Abstract: An oil seal construction for a rotary mechanism including a seal ring receivable in an annular groove in an end face of the rotor of said mechanism with the ring having a pair of radially-spaced annular surfaces for sealing engagement with the adjacent side housing and with a ring of elastomeric material disposed in said oil seal groove behind the seal ring and also including a metallic spring disposed behind the elastomeric ring such that the metallic spring forces act through the elastomeric ring to urge the seal ring outwardly of the rotor groove.

Abstract: The lubrication system for rotary mechanisms of the Wankel type, having a housing in which a rotor planetates, comprises an elongated, shallow trough in the inner peripheral surface of the trochoid housing of the mechanism, which trough extends substantially across the entire width of the surface and with its longitudinal axis canted relative to the trace line of the inner peripheral surface. A supply means is provided to conduct metered amounts of lubricant to the trough from a suitable source of lubricant to fill and maintain the trough in a full condition so that the apex seal blade carried by the rotor picks-up and distributes lubricant along the inner peripheral surface.

Abstract: An internal combustion engine having an intake port with a valve movable to open and close the intake port and with the duration of the period in which the valve is fully open during each intake phase being varied to regulate the power output of the engine.

Abstract: The system and method of this invention is directed to effecting combustion of fuel in a rotary piston, internal combustion engine having a housing defining a trochoidal-shaped, multi-lobe cavity in which a rotor is mounted for planetary rotation and defines with the housing working chambers that successively expand and contract in volumetric size as the rotor orbits within the housing cavity. The system and method comprises a precombustion chamber which communicates with successive working chambers through an outlet port. When the outlet port is open to the working chamber at approximately the initiation of the expansion cycle of the working chamber, all the fuel for a particular engine operating condition of speed and load is mixed in the precombustion chamber with a relatively small quantity of air at a pressure substantially greater than the pressure in the working chamber to thereby cause ignition and flash of the fuel into the working chamber.