This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Experimental and Theoretical Study of Liquid LPG Injection
Annotation ability available
Sector:
Language:
English
Abstract
In the laboratory of Machines at the university of Gent a multi-point liquid LPG fuel injection system has been developed. The tests have shown that the LPG injection system works perfectly for all speed and load conditions of the engine. The advantages of LPG are confirmed with the tests: prevention of knock at high compression ratios, less exhaust gas pollutants. The tests were carried out on a standard Ford gasoline (injection) engine. Comparative tests are presented for the gasoline engine, the engine with an evaporation system (LPG and butane as fuels) and for the engine with the LPG injection system.
Then a parametric study of the LPG injection engine has been done (ignition timing, air-fuel ratio, compression ratio). The influences of these parameters on the engine characteristics are given (influences on power output, efficiency, fuel consumption, NOX concentration). A remarkable increase in the power output when the compression ratio is increased is noted.
Also, a heat release analysis is made for the LPG injection engine. Therefore a high pressure transducer was mounted flush with the combustion chamber wall; and cylinder pressure diagrams were obtained. A short description of the heat release analysis theory is given (based on the first law of thermodynamics). Instantaneous and cumulative rates of combustion for different engine conditions are presented, compared and discussed. Finally it is shown that the combustion phasing angle (crank angle for which 50% of the fuel is burnt) is a useful tool to optimize the engine parameters.
Recommended Content
| Technical Paper | Piston Top Shapes and Their Influence Upon Otto Cycle Combustion |
| Technical Paper | Developing a Fuel Stratification Concept on a Spark Ignition Engines |
Authors
Topic
Citation
Sierens, R., "An Experimental and Theoretical Study of Liquid LPG Injection," SAE Technical Paper 922363, 1992, https://doi.org/10.4271/922363.Also In
References
- GROSCHEL B. “Possibilities for reducing fuel consumption with operation on LPG
- CHAPMAN P.M. DESLANDES V.D. “Development of a LPG fuelling System for internal combustion engines 1982
- VARELA E. LECUONA A. RODRIGUEZ P. PEREZ R. “Actuaciones de motores de inyeccion electronica alimentada con G. P. L. en fase liquida E.T.S.I. Aeronauticos U. P. Madrid MIRA Publication
- MENRAD H. STEINKE D. WEGENER R. “Abgasemissionen mit alternativen Krafstoffen (exhaust emissions with alternative fuels) MTZ 47 1986 2
- SIERENS R. VERDONCK W. “Development of a natural gas stratified charge rotary engine SAE paper nr 850034
- KLIMSTRA J. W0LTING H. R. “Quality aspects of natural gas as an engine fuel Gas Quality Elsevier Science Pulishers B. V. 1986 The Netherlands
- Compressed natural gas (CNG) as a petrol substitute in New Zealand Liquid Fuels Trust Board Sept. 1986
- BONVECCHIATO G. “Compressed natural gas as automotive fuel: the italian experience 3rd Int. Rational Gas utilization Conference Prague Oct. 1985
- SIERENS R. “A combustion model for homogeneous charge natural gas rotary engines SAE paper nr 890328
- GOTELAERE F. STAELENS B. “Experimenteel en theoretische onderzoek op vloeibare LPG injektie 1990
- KLIMSTRA J. “The optimum combustion phasing angle - a convenient engine tuning criterion SAE paper, nr 852090
- MOREL T. RACKMIL C.I. KERIBAR R. JENNINGS M.J. “Model for heat transfer and combustion in spark ignited engines and its comparison with experiments SAE paper, nr 880198
- DIERICK J. STROO K. “Onderzoek op vloeibare LPG injectie 1988
- LANGENRAEDT Y. LAUREYS G. “Onderzoek op vloeibare LPG injectie 1989