Knocking index value calculation device and calculation...

Details Knocking index value calculation device and calculation... Knocking index value calculation device and calculation...

2005-02-08

2005-02-08

Huynh, Hai (Department: 3747)

Internal-combustion engines

Spark ignition timing control

Electronic control

C123S406220, C123S406550

Reexamination Certificate

active

06851411

ABSTRACT:
A controller (31) of a knocking index value calculation device in a spark ignition engine (1) determines operating conditions of the engine (1), estimates an in-cylinder pressure at a reference crank angle, which is set at a predetermined crank position after compression top dead center, using these operating conditions, estimates a temperature of unburned gas in the cylinder at the reference crank angle using these operating conditions, and calculates a knocking index value using the in-cylinder pressure and unburned gas temperature.

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patent: 2001221105 (2001-08-01), None
patent: 44543 (2004-02-01), None

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