Experimental Performance Analysis of LPG/Gasoline Bi-fuel Passenger Car PFI Engines 2007-01-2132
This paper discusses experimental outcome of port fuel injected engines operated on gasoline mode and LPG mode. Eight Passenger car PFI engines were tested by using computerized engine data acquisition and control system on gasoline mode and LPG mode. Objectives of this experimental study were
To establish generic performance trend for group of newly introduced gasoline/LPG passenger car bi-fuel engines in Indian market. This trend has been established.
To compare performance of one sample engine in gasoline and LPG mode. This performance has been compared from performance characteristics curves in both modes.
To establish methodology to compare and contrast the performance of various types of Gasoline/LPG passenger car engines. This methodology has been established for a group of engines.
To define new normalized figure of merit suitable for the performance comparison of passenger car engines. A parameter power per unit displacement has been defined.
From experimental results, generic performance trend for passenger car engines was established. A unit parameter KW/lit was calculated for each engine for comparison in relation to rated torque, maximum exhaust gas temperature and speeds corresponding to maximum torque and maximum power. Eight engines of same specifications were tested and results were plotted. Engines with different specifications also can be tested and generic performance trend can be established. These graphs will be useful for engine designers to know general trend of gasoline and LPG PFI passenger care engines in the Indian auto market.
Entire set of performance characteristics curves for one sample engine are plotted and are given in Appendix. Detailed analysis of results is presented in paper. Petrol and gasoline have same meaning in this paper.