Analysis of Combustion Behavior During Cold-Start and Warm-Up Process of SI Gasoline Engine State Key Laboratory of Automotive Safety and Energy, Tsinghua Univ

Format:

Conference/Event

Author/Creator:

Cheng, Yong, author.

Conference Name:

SAE International Fall Fuels & Lubricants Meeting & Exhibition (2001-09-24 : San Antonio, Texas, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2001

Summary:

Experiment is carried out on an engine dynamometer bench for simulating the cold-start of port-injected gasoline engines. Based on the measured temperatures and HC emissions at the inlet and outlet of the catalytic converter as well as cylinder pressure, how to achieve minimum catalytic-converter-out HC emissions prior to catalyst light-off has been discussed. In this experiment, the cold-start period is divided into three stages referred to the opening of the throttle valve. Most of the HC are emitted in the first stage, id est from cranking to the opening of the throttle valve. Retarding of spark timing could cause incomplete combustion in the cylinder and lead to the oxidization of the unburned HC in the exhaust manifold, which results in reductions of tail-pipe HC emissions. Incomplete combustion could also occur when throttle valve is open by setting proper spark timing. The combustion in the exhaust manifold would contribute to the reduction of HC emissions and quicken the light-off of the catalyst

Notes:

Vendor supplied data

Publisher Number:

2001-01-3557

Access Restriction:

Restricted for use by site license