Fuel system diagnostics by analyzing engine crankshaft speed...

Details Fuel system diagnostics by analyzing engine crankshaft speed... Fuel system diagnostics by analyzing engine crankshaft speed...

2008-06-16

2010-11-16

McCall, Eric S (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Engine speed

C073S114270

Reexamination Certificate

active

07832259

ABSTRACT:
Combustion within an internal combustion engine is diagnosed and includes monitoring crankshaft angular velocity and generating a combustion phasing value for a combustion chamber based on the crankshaft angular velocity. The combustion phasing value is compared to an expected combustion phasing value based on a predetermined start of injection crank angle and combustion phasing differences greater than an allowable combustion phasing difference are identified based on the comparison.

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