Measuring and testing – Engine detonation – Combustion signal compared to reference signal varied by a...
123435, G01L 2322
A method and an arrangement for regulating the signal level in detecting knocking in an internal combustion engine. A transducer, incorporated in a knocking detector, senses a parameter responding to pressure and/or temperature during combustion in the engine and emits a signal representing the degree of knocking. The output signal of the knocking detector controls a knocking-regulating quantity affecting combustion in the engine by being applied to a signal level limiting block which, when knocking sensed by the transducer exceeds a preselected level, limits the output signal level to a level corresponding to said preselected level, whereafter the output signal, at least for a limited time, can only be altered by signals representing a lesser degree of knocking than the preselected degree. Knocking can then be inhibited without delay.
patent: 4289102 (1981-09-01), Katsumata et al.
patent: 4290398 (1981-09-01), Hattori et al.
Gill James J.
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