The importance of minimizing fuel consumption has necessitated the study of knock which drastically limits the attainment of high combustion efficiency in current s.i. engines. In the present work, four aspects of this phenomenon have been examined: It was found that the most severe knocking conditions were those met with by small displacement engines at a sufficiently high constant speed (4000-5000 rpm) and wide-open throttle.In these conditions, high knock intensities, much greater than the trace level, are needed to cause engine damage. Motor Octane Number is the most important parameter in controlling high-speed knock at all engine speeds, this was determined using the CFR engine under fuel stress conditions very similar to those present in commercial engines.
High Speed Knock in S.I. Engines
Sae Technical Papers
International Automobile Engineering and Manufacturing Meeting ; 1974
1974-02-01
Conference paper
English
High speed knock in S.I. engines
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