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Development of Anti-Plug Fouling Ignition System
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English
Abstract
The new generation engines currently being developed tend to require cold type spark plugs, which are prone to fouling.
This paper describes the development of a new Coil on Plug ignition system that resolves this problem by using the high energy and the fast secondary voltage rise time of a capacitive ignition while maintaining inductive ignition characteristics for good ignitability. To evaluate the effectiveness of the system, spark plug insulation resistance was monitored and cold tests were conducted. The results demonstrated that the new ignition system is remarkably effective: insulation resistance remains high and startability and driveability are unaffected under conditions normally leading to excessive misfires and failure to start with a conventional inductive system.
To satisfy environmental concerns, automobile manufactures are increasingly turning to high compression ratio engines in view of their improved performance. In addition new two-stroke engines and FFVs (Flexible Fuel Vehicles) are being developed. For various reasons, these engines require cold type spark plugs: high compression ratio engines operate at higher temperatures, two-stroke engines fire twice as often and FFVs tend to suffer from pre-ignition when operated on methanol fuel.[1] [2] Unfortunately cold type spark plugs are susceptible to fouling. There is therefore a great need for a new ignition system that will prevent plug fouling. This paper describes the development of an ignition system designed to fulfill this need and evaluates the performance of the resultant system.
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Citation
Morino, S. and Mogi, K., "Development of Anti-Plug Fouling Ignition System," SAE Technical Paper 920575, 1992, https://doi.org/10.4271/920575.Also In
References
- Menrad H. et al. “Pre-Ignition and Knock Behavior of Alcohol Fuels” SAE Paper No. 821210
- Dasch C.J. Brinkman N.D. “Cold Start Using M - 85 (85%Methanol): Coping with Low Fuel Volatility and Spark Plug Wetting” SAE Paper No. 910865
- Jiewertw Sten et al. “Saab Direct Ignition System and its Cold Start Performance” SAE Paper NO. 890044
- Ward Michael A.V. “A New Ignition System for Lean Mixture Based on a New Approach to Spark” SAE Paper No. 890475
- Ziegler Gerhard F.W. et al. “Influence of a Breakdown Ignition System on Performance and Emission Characteristics” SAE Paper No. 840992
- Solomon Arun S. P “Plasma-Jet Ignition of Fuel Sprays in a Rapid Compression Machine” SAE Paper No. 880205
- Nakai M. et al. “A Study of Combustion Stability Though Long Durational Plasma Ignition in a Spark-Ignited Engine” Nissan Technical Review 20 1984