Appeal No. 1999-1621
Application No. 08/035,348
subject matter and are not on appeal before us.
The invention is directed to a knock detection method and
system for use in an internal combustion engine. In
particular, the invention employs a trended time weighted
version of the knock variable in making a knock determination.
Representative independent claim 1 is reproduced as
follows:
1. A method of knock detection comprising the steps of:
acquiring spectral energy associated with vibration
caused by a knocking condition sensed from a running engine;
providing a knock variable derived from magnitudes of
individual spectral components corresponding to characteristic
knock spectra associated with said acquired spectral energy;
and
providing a knock indication when said knock variable
exceeds a magnitude of a trended time weighted version of said
knock variable by a predetermined magnitude.
The examiner relies on the following reference:
Remboski, Jr. et al. {Remboski] 5,400,644 Mar. 28,
1995
[filed Sept. 29, 1992]
Claims 1, 14 and 27 stand rejected under 35 U.S.C. 103 as
unpatentable over Remboski.
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