Fuel distillation property determining apparatus and method

Details Fuel distillation property determining apparatus and method Fuel distillation property determining apparatus and method

2011-08-02

2011-08-02

Kirkland, III, Freddie (Department: 2855)

Measuring and testing

Engine detonation

Fuel rating

Reexamination Certificate

active

07987696

ABSTRACT:
A fuel distillation property determining apparatus for use in a multi-injection system for diesel engines. The apparatus acquires a physical quantity indicating a state of burning of fuel in the diesel engine, determines a physical quantity variation sensitivity defined by a ratio of a quantity variation that is a difference between a first value of the physical quantity, as acquired upon execution of a first one of a sequence of sub-injections, and a second value of the physical quantity, as acquired upon execution of a following one of the sub-injections, to a difference between a first quantity of fuel sprayed in the first sub-injection and a second quantity of fuel sprayed in the following sub-injection, and determine a cetane value of the fuel based on a predefined relation between the physical quantity variation sensitivity and the cetane value. This ensures the accuracy in determining the cetane value at low costs.

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Japanese Office Action dated May 11, 2010, issued in corresponding Japanese Application No. 2007-319699, with English translation.

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