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An Investigation of Puff-Jet Ignition in an Internal Combustion Engine Fueled by Natural Gas
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Abstract
An electromechanical ignition device, the puff-jet, produces a highly turbulent ignition kernel that reduces ignition delay and burn duration. These properties, which are also exhibited by plasma jet igniters, should enhance the performance of vehicles run exclusively on CNG and facilitate the switch from gasoline to CNG in dual fuel vehicles. Results of preliminary bomb tests of the puff-jet have been confirmed using a motored single cylinder internal combustion engine. Compared with a spark gap ignition system, the puff-jet decreased both the ignition delay and the burn duration of methane charges and extended the lean misfire limit. Output power from the same engine run continuously on lean air-methane mixtures has been compared using the puff-jet system and a conventional spark plug. The puff-jet igniter was observed to increase output power when used under lean mixture conditions.
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Citation
Fisher, P., Ridley, J., Pitt, P., and Clements, R., "An Investigation of Puff-Jet Ignition in an Internal Combustion Engine Fueled by Natural Gas," SAE Technical Paper 860538, 1986, https://doi.org/10.4271/860538.Also In
References
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- Pitt, P.L. Ridley, J.D. Clements, R.M. 1974(b Low energy ignition of an ultra lean methane fueled internal combustion engine Comb. Sci. and Tech. 38 217
- Harrington, J. A. 1977 Application of a new combustion analysis method in the study of alternative fuel combustion and emission characteristics Future Automotive Fuels: Prospects, Performance, Perspective Collucci J.M. Gallopaulos N.E. Plenum Publishing Corporation New York, New York
- Dale, J.D. Smy, P.R. Clements, R.M. 1978 The effects of a coaxial spark igniter on the performance of and the emmisions from an internal combustion engine Combust. Flame 31 173
- Pitt, P. L. Clements, R.M. 1983 The effects of plasma jet ignition on a methane fueled internal combustion engine Comb. Sci. and Tech. 30 327
- Fisher, P.D. Pitt, P.L. Ridley, J.D. Clements, R.M. Puff-jet ignition of methane in an internal combustion engine Comb. Sci. and Tech. July 1986