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OwnerMasato Mitsuhashi, Kuninori Ito +3inventors
InventorsMasato Mitsuhashi, Kuninori Ito, Akihiro Yuki, Hiroyuki Ishida, Takafumi Shimada
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The present invention provide a feedback combined system of a reciprocating internal combustion engine, in which, in order to increase output and thermal efficiency by increasing fuel supply without increasing the maximum combustion temperature than the conventional level and concurrently reduce emissions such as NOx, a heat exchanger is provided downstream the exhaust turbine connected to the exhaust collector, sub-critical water of pressure of between 18 MPa and 22.1 MPa (critical pressure) and temperature of between 250° C. and 580° C. or super-critical water is generated by the heat exchange of water supplied to the heat exchanger with the exhaust gas, said sub- or super-critical water is injected into the cylinder in the range of 90° before the top dead center and 30° after the top dead center and fuel is injected so that the air excess ratio at the maximum output is 1˜2.5 and the maximum combustion temperature is 1600˜2000° C.
A method of operating a reciprocating internal combustion engine in which liquid or gaseous fuel such as petroleum group fuel, hydrogen, natural gas, alcohol, etc. is burned and the combustion gas works as working fluid, wherein increased mass of fuel is injected, and sub-critical water of pressure of between 18 MPa and 22.1 MPa (ctitical pressure) and temperature of between 250° C. and 580° C. or super-critical water (hereafter referred to as sub- or super-critical water) is injected into the cylinder in the range of between 90° before the top dead center and 30° after the top dead center so that the air excess ratio at the maximum output is 1˜2.5.
A system of a reciprocating internal combustion engine in which liquid or gaseous fuel such as petroleum group fuel, hydrogen, natural gas, alcohol, etc. is burned and the combustion gas works as working fluid, wherein the system comprises:
Dependencies are inferred from the claim text.