Abstract
The paper presents elaborated results of temperature and pressure measurements in the condensed propane-butane mixture vehicle engine fuel system. Engine of 1.8 dm³ displacement with spark ignition LPG gas fuel system was examined. The aim of the measurements was to assess whether the gas does not condense again in low-pressure part of the fuel system. The amount of heat indispensable for regulator/evaporator heating in stationary states of work under high engine loads that result in high flow of LPG fuel in the fuel system was examined and calculated. LPG temperature and pressure courses in transient states at rapid increase of engine load from load corresponding to drive at 80 km/h up to the maximum torque for the same engine speed were measured. Further examination of nonstationary states consisted in heating the engine working with constant torque and switching fuel between gas – gasoline – gas at work with maximum torque. Conclusions on the quality of system work at engine high loads were formulated.
Keywords: Vehicle engine LPG gas fuel, pressure regulator/evaporator, cooling system