Flame Temperatures Vary with Knock and Combustion-Chamber Position Research Physicist and Research Chemist, General Motors Corporation

Format:

Conference/Event

Author/Creator:

Rassweiler, Gerald M., author.

Conference Name:

Annual Meeting of the Society

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1935

Summary:

TEMPERATURE measurements have been made along three lines through the combustion chamber of a gasoline engine running under non-knocking and under knocking conditions. The results show that, after passage of the flame fronts through portions of the charge located either near the point of ignition or near the center of the combustion chamber, the temperature rises continually until shortly before maximum pressure is reached. When the charge is completely inflamed, there is a temperature gradient along the length of the combustion space, the temperature at the spark-plug end being as much as 600 deg. fahr. higher than at the opposite end. These effects are explained on the basis of adiabatic compression and expansion of the gases during the combustion process.Comparison of knocking and non-knocking explosions shows that in the knocking case: (a) the maximum temperatures are higher, (b) the maximum temperatures are attained earlier in the cycle, (c) the rate of cooling during the expansion stroke is greater, and (d) the exhaust temperatures are lower

Notes:

Vendor supplied data

Publisher Number:

350091

Access Restriction:

Restricted for use by site license