Development of Atmospheric Air-level Emission Vehicle Technology for Gasoline Engines Nissan Motor Company, Limited

Format:

Conference/Event

Author/Creator:

Inoue, Kōichi, author.

Conference Name:

SAE World Congress & Exhibition (2009-04-20 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2009

Summary:

Exhaust emissions of a test gasoline engine were successfully reduced to 1/30 of the SULEV standards with the aim of minimizing the impact on the atmospheric environment. This reduction was achieved by reducing engine-out emissions from engine startup and by reconciling faster catalyst light-off with suppression of catalyst thermal degradation to avoid a decline in conversion efficiency. Specifically, a new intake gas flow control device and a low heat mass spark plug with high ignitability were developed for promoting post-oxidation of unburned HCs in the combustion chamber thus markedly reducing engine-out emissions, while ensuring acceptable drivability. The conflicting requirements for quicker catalyst light-off and avoidance of catalyst thermal degradation have been achieved at unprecedented levels by developing a new bypass-type exhaust manifold. Moreover, the adoption of an HC trap catalyst developed in-house at Nissan also contributed to the attainment of cleaner emissions at levels equal to 1/30 of the SULEV standards. The levels achieved are comparable to the atmospheric concentrations of the measured species in urban areas

Notes:

Vendor supplied data

Publisher Number:

2009-01-1076

Access Restriction:

Restricted for use by site license