Method and system to prevent knocking operation of an internal c

Details Method and system to prevent knocking operation of an internal c Method and system to prevent knocking operation of an internal c

1985-04-29

1986-06-24

Nelli, Raymond A.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

123435, 123419, 123422, 123416, 123417, G01L 2322

Patent

active

045962170

ABSTRACT:
To prevent slow reestablishment of operating conditions which might lead to knocking of an internal combustion engine if the internal combustion engine operates under transient conditions, for example under conditions of rapid acceleration, the reestablishment rate of an operating control signal, for example ignition timing which, after retardation, is again advanced, transient speed changes are sensed in a differentiator (17) and, if so sensed, cause reestablishment of prior operating condition at a faster rate (f3) than otherwise, normally set into the system (see f2, FIG. 2). Additionally, the reference level of a comparator which compares sensed engine vibration signals with a reference can be increased so that, due to increased engine noise, erroneous knocking signals will not be generated by the comparator. Function generators (18, 19) which provide changed reference levels or signal weighting levels as a function of the degree or characteristics of transience, are preferably provided so that the system will respond dynamically.

REFERENCES:
patent: 4382429 (1983-05-01), Enoshima et al.
patent: 4385607 (1983-05-01), Honidea et al.
patent: 4393837 (1983-07-01), Sugihara et al.
patent: 4445479 (1984-05-01), Takakuwa et al.
patent: 4452206 (1984-06-01), Horuguchi et al.

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