Abstract

The main trends in the car gasification are considered. It is shown that after the global automakers lost the interest in the creation and production of gas engines, the development of gas systems continues in the secondary market. A noticeable decrease in the valve train durability due to the valves recession was noted, which can make the conversion of the engine to gas fuel technically inexpedient and economically ineffective. Based on the data obtained, a list of constructive measures was compiled to reduce wear when converting the gasoline engine to gas fuel. A method for calculating the economic efficiency of a gasoline engine operating on gas, taking into account the initial and operating costs, has been developed. It is noted that the transfer of a serial gasoline engine to gas without making changes to the valve train design means an absolutely inevitable decrease in the resource of the valveseat interface. By calculation, it is shown that despite the large difference in price between gasoline and gas, the total economic effect of converting a gasoline engine to gas does not exceed 1520% and in general has a number of serious limitations of an economic and a technical nature. For the first time, it has been shown that any options for unauthorized conversion of car engines to another fuel should be considered, first of all, from the point of view of economic efficiency over the entire service life of the car, and not as private advantages obtained during certain periods of its operation. The results obtained can be used in practice in the development of transport gasification programs, in assessing the real economic efficiency of the use of gas cylinder equipment, as well as in the search for the faults caused by the engine design change if converting it to another fuel.

Keywords:Internal combustion engine; Gas fuel; Gas equipment; LPG; Valve recession