Precombustion chamber rotary piston diesel engine

In a rotary internal combustion engine of the diesel type having a housing defining a trochoidal, two-lobe cavity in which a rotor, having three contiguous flank portions and pockets in each such flank portion, is eccentrically mounted for rotation and which defines with the housing a plurality of working chambers that successively expand and contract in volumetric size as the rotor and housing rotate relative to each other, a fuel combustion system comprising:

• a. an air intake port in the housing communicating with a working chamber during its expansion cycle of operation for passing only air into the working chambers for compression of such air;
• b. an exhaust port in the housing communicating with a working chamber during its exhaust cycle of operation for expelling spent products of combustion from the working chambers;
• c. a precombustion chamber adjacent said working chambers;
• d. outlet port means in the housing for communicating the precombustion chamber with the working chambers at a point angularly spaced in the direction of rotor rotation a relatively small distance past the lobe junction of the housing cavity remote from said air intake port;
• e. means for injecting all of the fuel required for a particular engine operating speed and load into the precombustion chamber;
• f. a source of compressed air having a pressure substantially greater than the maximum pressure of the compressed air in the working chamber at full compression and having a heat of compression sufficient to effect spontaneous ignition of the fuel injected by said means;
• g. passageway means communicating said source of compressed air with the precombustion chamber to pass such compressed air into the precombustion chamber and into admixture with the fuel to effect thereby ignition of the fuel injected by said fuel injection means into the precombustion chamber;
• and
• h. valve means for controlling compressed air flow from the passageway means into the precombustion chamber in relation to rotor rotation so that the ignited fuel flashes from the precombustion chamber through the outlet means when the rotor is in a preselected angular position.