Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-04-20
1979-05-08
Myhre, Charles J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123117D, 1231465A, F02P 504
Patent
active
041530195
ABSTRACT:
The ignition spark events of the cylinders of an internal combustion engine are timed to provide peak cylinder combustion pressure at a predetermined engine crankshaft angle relative to piston top dead center. The engine crankshaft angle at which the peak cylinder combustion pressure of a selected monitored engine cylinder occurs during each power stroke thereof is detected and indicated by a logic signal. An electrical peak pressure error signal indication of the engine crankshaft angle difference between the crankshaft angle at which peak cylinder combustion pressure actually occurs and the predetermined desired engine crankshaft angle is electronically generated during the period of time required for the engine crankshaft to rotate through a constant predetermined engine crankshaft angle at all engine speeds. This signal indication is electronically processed by an electronic circuit combination which, in response thereto, adjusts the ignition spark timing in the direction to provide ignition spark events at the engine crankshaft angle which results in peak cylinder combustion pressure at the predetermined desired engine crankshaft angle.
REFERENCES:
patent: 3749070 (1973-07-01), Oishi et al.
patent: 3875912 (1975-04-01), Bullo
patent: 3896776 (1975-07-01), Ford
patent: 3921610 (1975-11-01), Hartig
patent: 3923021 (1975-12-01), Stark
patent: 3923022 (1975-12-01), Schull
patent: 3957023 (1976-05-01), Peterson
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patent: 3996911 (1976-12-01), Canup
patent: 4054111 (1977-10-01), Sand
patent: 4063538 (1977-12-01), Powell et al.
Paper Entitled "Closed Loop Control of Spark Timing," by J. David Powell, at the Automotive Engine Control Workshop, 8-9 Jul. 1975.
Brown Mitchell L.
Laubenstein Allan E.
Starich Donald V.
General Motors Corporation
Myhre Charles J.
Nelli Raymond A.
Stahr Richard G.
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