Method for estimating the crank angle at which 50% of the...

Details Method for estimating the crank angle at which 50% of the... Method for estimating the crank angle at which 50% of the...

2010-10-05

2011-10-04

McCall, Eric S (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Engine speed

C073S114040

Reexamination Certificate

active

08028568

ABSTRACT:
A method for determining the angular speed of a drive shaft of an internal combustion engine at each tooth event of a phonic wheel presenting a number N of teeth includes detecting the angular amplitude for each tooth; detecting the time of each tooth; and determining the raw angular speed of each tooth according to the corresponding angular amplitude and time. For each tooth a compensation value is determined which represents the difference between the actual angular amplitude of the tooth and the theoretic angular amplitude of the tooth; and determining the angular speed of each tooth by correcting the raw angular speed based on the corresponding compensation value.

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