Low Noise Catalytic Ignition I.C. Engine.
Abstract
A prototype catalytic ignition internal combustion engine using diesel fuel was evaluated and experimentally tested for potential beneficial effects in reducing engine noise. Experimental results produced a total sound pressure improvement in the 4 - 5 dB range. Noise reductions were even larger in the speech frequency and high human sensitivity ranges. Literature research and theoretical advancements indicate the potential for a larger noise reduction as well as a confirmation that the reduction, resulting from a reduction in combustion noise, would be additive with most other conventional sound improvement technologies. Independent of noise reduction potential, the catalytic ignition technology also shows strong potential to produce significant improvements in fuel economy, power, cold start capabilities, pollutant emissions and multifuel capability (both in terms of improved fuel quality insensitivity and an ability to utilize low or zero cetane fuels). Early prototypes of the catalytic ignition engine have been fabricated by modifying an existing diesel engine, and it is believed that commercial production of a fully-developed catalytic ignition engine would involve relatively little redesign and retooling from existing diesel production. Cost of a commercial catalytic engine is estimated to be low ($10 to $40 per cylinder above existing diesel engines) and a retrofit capability has been demonstrated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1987
- Accession Number
- ADA186136