| 摘要 |
SYSTEMS AND METHODS TO DISTINGUISH ENGINE KNOCK FROM PISTON SLAP A method of distinguishing piston slap from engine knock in a reciprocating device includes obtaining a fundamental frequency of a cylinder, the cylinder having a thrust face and an anti-thrust face, receiving a first signal from a first knock sensor mounted on the cylinder, and identifying piston slap by evaluating whether a first plurality of amplitudes of the first signal at the fundamental frequency and one or more harmonic frequencies of the fundamental frequency exceed a piston slap threshold value. 58 2056 60 ,, 1 32| 26 38- 54 34 FIG.P M 444 Qk46 FIG. 2 ,) |
