Abstract: Disclosed herein is a rotary internal combustion engine including a rotor mounted for rotation in a rotor chamber or cavity and having a plurality of apex portions which cooperate with the peripheral wall of the rotor cavity to form a plurality of working or rotating chambers which vary in volume during successive intake, compression, expansion and exhaust phases of the engine cycle, a main fuel inlet communicating with the rotor cavity and communicating successively with each of the rotating chambers to permit intake of fuel for subsequent compression and ignition, a port located to communicate with rotor cavity at an area where a low pressure condition exists during the engine cycle, and a primer valve connected in communication with the port for selectively pumping a quantity of primer fuel directly into the rotor cavity independently of engine operation and thereby facilitating starting of the engine.

Abstract: Disclosed herein is an internal combustion engine including a cylinder having a head end, a piston reciprocal in the cylinder relative to the head end, a port communicating with the cylinder in spaced relation to the head end and subject to pressure variation in response to piston reciprocation, a manually operable primer pump communicating with the port for pumping primer fuel into the cylinder through the port, and a fuel pump including a pulse chamber defined in part by a diaphram communicating with the port and operable in response to pressure variation to effect fuel pumping operation.