Proceedings ArticleDOI
The Performance of a Spark-Ignition Engine Fuelled with Natural Gas and Gasoline
R. L. Evans,F. Goharian,P. G. Hill +2 more
- Vol. 840234
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TLDR
In this article, an experimental evaluation has been made of the power output, specific fuel consumption and thermal efficiency of a modern 4 cylinder spark ignition engine operating on gasoline and natural gas.Abstract:
An experimental evaluation has been made of the power output, specific fuel consumption and thermal efficiency of a modern 4 cylinder spark ignition engine operating on gasoline and natural gas Tests have been conducted at various speeds, spark advance angles and airfuel ratios, all at wide open throttle Performance on gasoline and natural gas has been compared and optimum spark advance determined for natural gas operation With natural gas operation, brake power was found to decrease by between 113% and 166% compared to gasoline operation Brake specific fuel consumption was found to decrease with natural gas operation, although this is due to the higher calorific value of natural gas In terms of brake thermal efficiency, operation with natural gas was found to be less efficient than with gasoline This is due to the lower flame speed of natural gas and the proportionally higher friction losses at the reduced power levelsread more
Citations
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Journal ArticleDOI
Extension of the lean operating limit for natural gas fueling of a spark ignited engine using hydrogen blending
S. R. Bell,Manishi Gupta +1 more
TL;DR: In this paper, the performance, emissions and combustion characteristics of lean mixtures of natural gas and hydrogen were studied in a conventional spark ignited engine, and the results showed that at equivalence ratios leaner than 0.80, improvements in BHP, BSFC, and BTE were significant with hydrogen addition.
Proceedings ArticleDOI
Performance and Emissions of a Natural Gas-Fueled 16 Valve DOHC Four-Cylinder Engine
Proceedings ArticleDOI
The Effects of Compression Ratio on Nitric Oxide and Hydrocarbon Emissions from a Spark-Ignition Natural Gas Fuelled Engine
Sho S. Takagaki,Robert R. Raine +1 more
Journal Article
A Particle Swarm Optimization Algorithm for Mixed-Variable Nonlinear Problems
H. Nahvi,Iman Mohagheghian +1 more
TL;DR: It will be shown that PSO is one of the best optimization algorithms for solving mixed-variable nonlinear problems and some changes are performed in the convergence criterion of PSO to reduce computational costs.
References
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Proceedings ArticleDOI
The Laminar Burning Velocity of Isooctane, N-Heptane, Methanol, Methane, and Propane at Elevated Temperature and Pressures in the Presence of a Diluent
Thomas W. Ryan,Samuel S. Lestz +1 more
TL;DR: An electrically driven toy in which a transmission mechanism is disengaged through a manually operated changeover means from the driving power source when the energization of the power source is interrupted as discussed by the authors.
Proceedings ArticleDOI
Emission Characteristics of Natural Gas as an Automotive Fuel
R. D. Fleming,J. R. Allsup +1 more
Journal ArticleDOI
Comparative Studies of Methane and Propane as Engine Fuels
N. P. W. Moore,B. N. Roy +1 more
TL;DR: In this article, the performance of a single-cylinder, high-speed, spark-ignition engine with gaseous methane and propane as fuels has been studied, and the power output and thermal efficiencies have been determined at two compression ratios, 5·5/1 and 10/1.
Proceedings ArticleDOI
Converting a small car to LNG: what are the problems and what can it do for economy and emissions
TL;DR: In this paper, a two liter compact car originally designed to run on gasoline was converted to running on LNG and compared with its gasoline counterpart, the LNG car gave significant improvements in fuel economy when expressed on an energy basis.