Experimental studies of the locomotive gas-diesel engine with electronic fuel supply control system

Fuel efficiency and exhaust gases toxicity are the main indicators of the locomotive diesel operation. To increase them, the paper proposes to convert the locomotive diesel to working on natural gas. Expediency of such conversion to operate on the natural gas according to the gas-diesel cycle, where natural gas being the main gaseous fuel is ignited from the dose of petroleum diesel fuel, is demonstrated. This diesel engine operation ensures stable ignition of the air-fuel mixture in a wide range of speed and load conditions. An electronic fuel supply control system for the gas-diesel engine was developed. Experimental studies of the locomotive gas-diesel engine created on the basis of the D50 diesel engine with the electronic fuel supply control system in the diesel characteristic modes were carried out. Substitution of the petroleum diesel fuel with natural gas in these modes was 60.3...94.1 % by weight. For the mode corresponding to the first position of the driver’s controller, opacity of the exhaust gases decreased by 19.6 %, when the diesel engine was switched to the gas-diesel cycle.

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