Angular speed detecting apparatus for crankshaft of internal...

Details Angular speed detecting apparatus for crankshaft of internal... Angular speed detecting apparatus for crankshaft of internal...

2007-09-07

2009-11-10

Caputo, Lisa M (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Engine speed

Reexamination Certificate

active

07614290

ABSTRACT:
An angular speed detecting apparatus for a crankshaft of an internal combustion engine. The angular speed detecting apparatus detects a rotational angular speed of the crankshaft based on an output of a pulse generator which generates a crank pulse at every predetermined rotational angle of the crankshaft. An average value of a speed parameter indicating a rotational angular speed of the crankshaft is calculated using the data sampled at intervals of 720/N degrees where N is a number of cylinders of the engine. A learning correction coefficient for correcting the speed parameter is calculated according to the average value. The speed parameter is corrected using the learning correction coefficient.

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