Device and method for controlling ignition timing of...

Details Device and method for controlling ignition timing of... Device and method for controlling ignition timing of...

2008-07-01

2008-07-01

Huynh, Hai H (Department: 3747)

Internal-combustion engines

Spark ignition timing control

Electronic control

C123S406340, C123S406380

Reexamination Certificate

active

11678822

ABSTRACT:
An engine ECU executes a program including a step of, when an absolute value of a difference between median value V(50) of magnitude values LOG(V), which is obtained by logarithmically converting a magnitude V detected based on a signal sent from a knock sensor, and a determination value V(KX) used for determining presence or absence of knocking is greater than the product of a standard deviation σ and a coefficient U(3) in a frequency distribution of magnitude values LOG(V) for N cycle(s), setting a value obtained by adding the product of the standard deviation σ and the coefficient U(3) to the median value V(50) of magnitude values LOG(V) as the determination value V(KX).

REFERENCES:
patent: 2007/0215108 (2007-09-01), Kaneko et al.
patent: 4-76249 (1992-03-01), None
patent: 2003-21032 (2003-01-01), None
patent: 2004-353531 (2004-12-01), None
patent: 2005-23902 (2005-01-01), None

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