Appeal No. 1997-1071
Application No. 08/350,119
in which a combustion state parameter is compared to a
threshold level which
is corrected regularly. Claim 8 is illustrative of the
claimed invention, and it reads as follows:
8. A combustion state diagnosis apparatus of a multi-
cylinder engine to diagnose combustion conditions in a
specific cylinder of a plurality of cylinders by measuring
revolution speed of the engine for each cylinder, obtaining,
as a combustion state parameter, a difference between
revolution speed of the specific cylinder and revolution speed
of at least one of the other cylinders, and comparing the
combustion state parameter with a prescribed threshold level
which is a function of at least one of the engine revolution
speed and engine load, comprising:
means for correcting said threshold level by a value
which is a function of said engine revolution speed.
The prior art references of record relied upon by the
examiner in rejecting the appealed claims are:
Maddock et al. (Maddock) 5,041,980 Aug.
20, 1991
Akase 5,307,671 May 03,
1994
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