METHOD OF OPERATION FOR GAS PISTON ENGINE WITH SPARK IGNITION Russian patent published in 2014 - IPC F02B19/12 F02B43/00 

FIELD: engines and pumps.

SUBSTANCE: invention relates to propulsion engineering and can be used in gas piston engines running of lean mixes of hydrocarbon gases. Proposed method comprises feed of gas-air mix from engine cylinder (combustion chamber) into ignition chamber and ejection of hydrogen-air mix flame from ignition chamber into combustion chamber. In compliance with this invention, residual gases are preserved in ignition chamber (its design rules out its venting) with temperature of some 500-700°C containing 6.7-5.6 wt % of carbon dioxide, 6.6-8.8 wt % of oxygen, 12.8-10.8 wt % of steam at air excess factor of 1.5-1.8. At compression, gas-air mix is forced in ignition chamber to get in contact with and to be mixed with ignition chamber residual gases so that reaction of combined conversion of lower alkanes (methane, ethane, propane, butane, etc) into hydrogen and carbon oxide. To sparking (discharge energy of at least 200 mJ), pressure and temperature in engine cylinder (combustion chamber) and ignition chamber ups to 5-5.5 MPa and 500-600°C to intensify said reactions of combined conversion in ignition chamber. Ignition chamber is made, preferably, of material, a catalyst of combined conversion reaction, for example, nickel refractory steel.

EFFECT: higher efficiency at minimum design variations.

3 cl, 2 dwg