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Cumulative frequency distribution of Knock Intensity (KI) for different SA values. Engine operating point WOT@1500rpm, 1500 dm3/h coolant flow rate.
Source publication
An experimental study is carried out for investigating the possibility to limit knock occurrence on a SI engine by proper engine thermal management. The control of the wall temperature is realized by means of an electrically driven water pump. The coolant flow rate can be varied regardless of the engine speed. Preliminarily, an experimental campaig...
Context in source publication
Context 1
... 6 shows the average value over 1000 acquisition cycles of signal of the in-cylinder pressure, for different values of spark advance and for a coolant flow rate of 1500 dm3/h. The corresponding cumulative frequency distribution of knock intensity, for the same operating condition, is plotted in Figure 7. Figure 8 shows that with a coolant flow rate of 1500 dm3/h and setting spark advance to 9.2° BTDC, KIth is next to light knock threshold and there are 300 cycles (30%) that is equal or exceed the value of 1 bar. ...
