Abstract
Environmental problems which are parallel to pollution, critical increase in global warming and hence increasing petroleum prices, lead us to Liquid Petroleum Gas usage as a strong supportive fuel.
Liquid Petroleum Gas systems are further developed to avoid power losses and make exhaust emissions to be compatible with recent norms according to developments in gasoline engines. These developments can be cited as; First generation basic mixer system, Second generation electronic controlled system, Third generation Liquid Petroleum Gas injection system and Fourth generation sequential Liquid Petroleum Gas systems.
The most important parts which distinct sequential systems from conventional ones are; a control unit similar to ECU, LPG evaporator and regulator, gas injectors, a collector in which injectors are arranged and special cables. Gas electronic control unit calculates the proper amount of gas for each cylinder and send the fuel to the cylinders independently while suction port is open.
In this study, LPG sequential system installation to gasoline internal combustion engine, the impact of failures on engine performance and exhaust emissions that can be formed during installation phase was examined. The most widely encountered situations on system failures because of installation phase can be listed as; the length of transition time from gasoline to LPG, misfiring of engine by working disorderly during the idling, excess in fuel consumption, lacking of performance, increase of exhaust emission values and lighting of engine failure lamp.
Keywords: LPG, sequential system, installation phases, LPG Systems, internal combustion engines.