USE OF GAS FUEL HEATING AS A CONDITION FOR SUCCESSFUL STARTING OF THE ENGINE UNDER LOW TEMPERATURES
The article defines a scientific problem - starting the engine on gaseous fuel in low temperatures. This is due to the specific features of the gas and fuel equipment, which do not allow creating a composition of the fuel mixture ready for ignition. The paper put forward a hypothesis that heating the gas in the reducer-evaporator will ensure a successful engine start at low temperatures. The purpose of the study is to establish the time and quantitative indicators of starting a gas-fueled engine with and without gas preheating at negative ambient temperatures. It is proposed to use hot air from a heater that runs autonomously on gasoline as a heat carrier. Hot air from the heater is supplied through a branch pipe to the casing, in which the reducer-evaporator is placed. The heat of the air heats up the space around the gearbox, the gearbox material, the coolant in it and the gas-air mixture, which then enters the cylinders and provides the engine start. In the course of experimental studies, measurements were made of starting time, fuel consumption when preheating the fuel in the gearbox, without preheating the fuel, when starting the engine with gasoline. We also measured the time and fuel consumption required to warm up the engine after starting up to 40 ° C, which is necessary to start the full operation of the car. The measurement results led to the conclusion that the ability to start the engine on LPG is significantly limited by temperature conditions. The time for starting an internal combustion engine running on gas without fuel preparation at temperatures from zero to minus 8 ° C significantly exceeds the starting time for an internal combustion engine operating on LPG using hot air heating. Preheating the fuel at low temperatures allows you to significantly expand the temperature range for starting a gas engine. A significant reduction in time and fuel consumption when starting an engine running on LPG allows us to assert that the developed fuel preparation scheme has proven its effectiveness.