Increased Burning Rates Offer Improved Fuel Economy-NOx Emissions Trade-Offs in Spark-Ignition Engines General Motors Research Labs

Format:

Conference/Event

Author/Creator:

Tuttle, James H., author.

Conference Name:

1979 Automotive Engineering Congress and Exposition (1979-02-26 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1979

Summary:

Mass burning rate was varied by using two single-cylinder engines, each fitted with different combustion-chamber geometries. The slower-burning chamber incorporated a side-mounted spark plug, the faster-burning chamber combined a more compact combustion space and a centrally located spark plug.The faster-burning engine exhibited an improved efficiency-NOx emissions trade-off, primarily due to the engine's higher maximum thermal efficiency and greater tolerance to charge dilution by recirculated exhaust gas.Faster burning also reduced cyclic variability in combustion, increased the knock-limited thermal efficiency, but offered no advantage in regard to hydrocarbon emissions

Notes:

Vendor supplied data

Publisher Number:

790388

Access Restriction:

Restricted for use by site license