Performance and NOx Emissions Modeling of a Jet Ignition Prechamber Stratified Charge Engine Massachusetts Institute of Technology

Format:

Conference/Event

Author/Creator:

Hires, S. D., author.

Conference Name:

1976 Automotive Engineering Congress and Exposition (1976-02-23 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1976

Summary:

The development of a cycle simulation model for the jet ignition prechamber stratified charge engine is described. Given the engine geometry, load, speed, air-fuel ratios and pressures and temperatures in the two intakes, flow ratio and a suitable combustion model, the cycle simulation predicts engine indicated efficiency and NO emissions. The relative importance of the parameters required to define the combustion model are then determined, and values for ignition delay and burn angle are obtained by matching predicted and measured pressure-time curves. The variation in combustion parameters with engine operating variables is then examined. Predicted and measured NO emissions are compared, and found to be in reasonable agreement over a wide range of engine operation. The relative contribution of the prechamber NO to total exhaust NO is then examined, and in the absence of EGR, found to be the major source of NO for overall air-fuel ratios leaner than 22:1

Notes:

Vendor supplied data

Publisher Number:

760161

Access Restriction:

Restricted for use by site license