Method for reacting to knock event in an internal combustion...

Details Method for reacting to knock event in an internal combustion... Method for reacting to knock event in an internal combustion...

2005-08-23

2005-08-23

Argenbright, Tony M. (Department: 3747)

Internal-combustion engines

Spark ignition timing control

Electronic control

C073S035060, C123S406450, C123S435000, C701S111000

Reexamination Certificate

active

06932056

ABSTRACT:
A control method for controlling an internal combustion engine selects a knock threshold magnitude and compares it to individual knock event magnitudes. The difference between these two values is calculated and limited to be within a predetermined range of values. This limitation selects either an event based control method, a proportional control method, or a control method with characteristics of both techniques. A gain is selected as a function of the algebraic sign of the limited or scaled value and the gain is multiplied by the calculated difference. The result is added to a cumulative value of previously calculated differences multiplied by associated gains. The cumulative value is used as a threshold that activates a plurality of control steps which can include ignition timing changes, fueling changes, or air intake magnitude changes.

REFERENCES:
patent: 4711212 (1987-12-01), Haraguchi et al.
patent: 5090382 (1992-02-01), Bolander et al.
patent: 5215058 (1993-06-01), Sakakibara et al.
patent: 6745749 (2004-06-01), Unland et al.
patent: 6845312 (2005-01-01), Cross et al.
patent: 2003/0183203 (2003-10-01), Unland et al.

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