DETONATION AND INTERNAL COOLANTS

480173

01/01/1948

Event
Pre-1964 SAE Technical Papers
Authors Abstract
Content
THE effects of the combustion process and detonation on internal coolants are presented here, as well as the effect of these coolants, in turn, on engine performance.
Some of the conclusions reached by the author are:
  1. 1.
    The difference between knocking and non-knocking fuels is one of degree; most fuels show evidence of pressure differentials during the combustion process, even though audible knock is not present.
  2. 2.
    Complete vaporization of the internal coolant is probably not secured until combustion is under way.
  3. 3.
    Water suppresses detonation by slowing down the combustion time and by cooling the end portion of the charge with water vapor contained in the end portion. Alcohol follows the same pattern when added to rich mixtures; for lean mixtures the higher antiknock qualities of the alcohol introduce a new factor.
Meta TagsDetails
DOI
https://doi.org/10.4271/480173
Pages
8
Citation
OBERT, E., "DETONATION AND INTERNAL COOLANTS," SAE Technical Paper 480173, 1948, https://doi.org/10.4271/480173.
Additional Details
Publisher
Published
Jan 1, 1948
Product Code
480173
Content Type
Technical Paper
Language
English