Method of determining cetane number of fuel in internal...

Details Method of determining cetane number of fuel in internal... Method of determining cetane number of fuel in internal...

2005-06-01

2008-09-09

Raevis, Robert R (Department: 2856)

Measuring and testing

Engine detonation

Fuel rating

Reexamination Certificate

active

07421884

ABSTRACT:
An object of the present invention is to provide a technology that enables to determine the cetane number of fuel in a state in which it is actually used for running an internal combustion engine with an improved degree of accuracy. A fuel injection for cetane number determination in which a specified quantity of fuel is injected into a combustion chamber during a compression stroke or expansion stroke, is performed while the internal combustion engine is in a fuel cut state. The cetane number of the fuel is determined based on the time period from a specified time to a time of ignition at which the fuel injected by the fuel injection for cetane number determination is ignited.

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