Title

Untreated Exhaust Emissions Of A Hydrogen-Enriched Cng Production Engine Conversion

Abstract

Engine dynamometer testing was conducted on a production automotive engine. Untreated exhaust emissions were measured over a range of hydrogen/natural gas fuel mixtures and equivalence ratios (Φ). The most important finding was that, with retarded ignition, extremely low raw NOx emissions can be attained at the same time as high brake thermal efficiency. With a 30% hydrogen mixture and Φ = 0.65, the effect of spark timing on engine efficiency is almost negligible over approximately 15°of crankshaft rotation. For an engine load of ∼400 kPa, brake thermal efficiency remained at 30%. NOx emissions can be kept below 0.05 g/kWh for bmeps up to 500 kPa and rpms above 1700, with low hydrocarbons and minimal effect on fuel economy. © Copyright 1996 Society of Automotive Engineers, Inc.

Publication Date

1-1-1996

Publication Title

SAE Technical Papers

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.4271/960858

Socpus ID

85072423384 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85072423384

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