Abstract

This article describes the methods of organizing the non-detonation combustion of liquefied petroleum gases (propane-butane mixtures) (LPG) in the cylinder of a gas-diesel engine with a starting dose of no more than 25%, at maximum power modes. The addition of a part of the exhaust gases and water in a vaporous state to the fuel mixture, when using a nickel-based catalyst in the combustion chamber of a gas-diesel engine, which triggers the conversion reaction of lower alkanes, ensures reliable non-detonation combustion of the fuel charge. The nickel catalyst is an oxygen carrier, which ensures cyclical reactions near its surface in the combustion chamber of a gas-diesel engine: metal oxidation during purging of the combustion chamber; conversion of alkanes at compression and combustion cycles. The problem of carbonization of the catalyst is solved by burning deposits during the combustion of the fuel charge. The organization of a fuel vapor-gas-air mixture with subsequent combustion in the presence of a catalyst provides improved environmental, fuel and economic characteristics of a gas-diesel engine in the entire range of operating modes and increases its reliability.

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