THUD—a noise due to high rates of pressure rise in the absence of surface ignition—is the subject of the investigations described in this paper. The tests were performed on 12/1 compression ratio engines.The authors found that thud could be obtained both in engines with clean combustion chambers and those with deposits. Thud is most likely to occur in 12/1 compression ratio engines at least — at wide-open throttle, high speed, and high spark advance.
THUDDING in High Compression Ratio Engines
Sae Technical Papers
Pre-1964 SAE Technical Papers ; 1906
1959-01-01
Aufsatz (Konferenz)
Englisch
Thudding in high compression ratio engines
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