Engine and engine spark timing control with knock limiting etc.

Details Engine and engine spark timing control with knock limiting etc. Engine and engine spark timing control with knock limiting etc.

1976-01-12

1977-01-11

Geoghegan, Edgar W.

Internal-combustion engines

Igniters

Incandescent

73 35, F02P 1102

Patent

active

040021556

ABSTRACT:
In a spark ignition internal combustion engine, an accelerometer is mounted on an engine component, preferably the intake manifold, and senses vibration including individual ringing vibrations due to engine knock or detonation. A reference signal is derived from the accelerometer signal during the portion of the engine cycle prior to possible knock-induced vibrations, which signal indicates the background accelerations due to noise. The number of individual ringing vibrations exceeding the reference signal during a predetermined amount of engine crankshaft rotation is counted. When the number of such counts exceeds a predetermined number during the predetermined crankshaft rotation, engine spark timing is retarded. If the number of such counts is less than a predetermined number during the predetermined crankshaft rotation, engine spark is advanced.

REFERENCES:
patent: 2450882 (1948-10-01), Costa
patent: 2470709 (1949-05-01), MacMillan
patent: 3393557 (1968-07-01), Brown et al.
patent: 3487640 (1970-01-01), Wostl et al.
patent: 3752139 (1973-08-01), Asplund
patent: 3822583 (1974-07-01), Keller et al.
patent: 3903857 (1975-09-01), Honig et al.
patent: 3919987 (1975-11-01), Haubner et al.

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