Flame photographs of light-load combustion point the way to reduction of hydrocarbons in exhaust gas

Journal Article · Fri Dec 31 23:00:00 EST 1971 · SAE Prog. Technol.; (United States)

OSTI ID:6647324

Wentworth, J T; Daniel, W A

An investigation to determine why the hydrocarbon content of automobile exhaust gas increases abruptly during deceleration and how this can be prevented is described in this paper. High-speed motion pictures of the flame, taken through a quartz-window cylinder head, show incomplete combustion under these conditions. Additional experiments established that excess residual-gas dilution is the major cause of the incomplete combustion. The concentration of hydrocarbons in the exhaust can be reduced either by admitting extra air and fuel to the intake manifold to limit vacuum attained during deceleration or by shutting off the fuel during deceleration.

• OSTI ID: 6647324
• Journal Information: SAE Prog. Technol.; (United States), Journal Name: SAE Prog. Technol.; (United States) Vol. 6; ISSN SAPTA
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330704* -- Emission Control-- Hydrocarbons
AIR POLLUTION CONTROL
AUTOMOBILES
CHEMICAL REACTION KINETICS
COMBUSTION CHAMBERS
COMBUSTION KINETICS
EXHAUST GASES
FLAME PROPAGATION
FLUIDS
FUEL-AIR RATIO
GASEOUS WASTES
GASES
HYDROCARBONS
IMAGES
KINETICS
OPERATION
ORGANIC COMPOUNDS
PHOTOGRAPHY
POLLUTION CONTROL
REACTION KINETICS
ULTRAHIGH-SPEED PHOTOGRAPHY
VEHICLES
WASTES