Fuel property detector for internal combustion engine

Details Fuel property detector for internal combustion engine Fuel property detector for internal combustion engine

2008-08-06

2011-10-25

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Spark ignition timing control

Electronic control

C123S575000

Reexamination Certificate

active

08042517

ABSTRACT:
A fuel property detector for an internal combustion engine determines a cetane number with high accuracy even when a high-cetane fuel is used.The fuel property detector includes a cylinder pressure detection device; ignition delay time calculating device for calculating ignition delay time in accordance with the cylinder pressure; a high-cetane fuel judgment device for judging based on the ignition delay time whether the cetane number of an employed fuel is high; an ignition delay time extension device that increases the ignition delay time by correcting a control parameter for the internal combustion engine; an ignition delay time recalculation device for recalculating the ignition delay time based on cylinder pressure after the ignition delay time is increased by the ignition delay time extension device; and a cetane number calculation device for calculating the cetane number of the employed fuel based on the recalculated ignition delay time.

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International Report on Patentability issued in International Application No. PCT/JP2008/064108, on Mar. 9, 2010.
European Search Report issued in EP 08827261.2, dated May 3, 2011.

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