Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1974-11-29
1976-05-11
Myhre, Charles J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123148E, F02P 504
Patent
active
039557235
ABSTRACT:
An ignition spark advance system is disclosed which includes pulse generating means responsive to rotation of the shaft of an internal combustion engine for generating a first train of pulses including a first reference pulse and a plurality of additional pulses and a second train of pulses indicative of the angular position of the shaft of the engine. Timing means are provided for measuring the passage of a predetermined fixed time period after the occurrence of the first reference pulse in the first train of pulses. The relative spacing of the pulses in the first train of pulses and the relative spacing of the pulses in the second train of pulses are selected to be a function of the fixed time period and of each other such that, for any given engine speed, at substantially the angular position of the shaft of the engine at which firing of the spark plugs is desired for that given engine speed, the sum of the number of pulses in the first train of pulses which occurred during the fixed time period plus the number of pulses which have occurred in the second train of pulses is equal to a fixed number. The system also includes a counter, and a gate means responsive to the timing means for applying to the counter those pulses in the first train of pulses which occur during the predetermined fixed time period. The second train of pulses is also applied to the counter and when the count in the counter reaches the fixed number, the spark plugs in the engine are fired.
REFERENCES:
patent: 3454871 (1969-07-01), Nolting
patent: 3696303 (1972-10-01), Hartig
patent: 3738339 (1973-06-01), Huntzinger et al.
patent: 3749073 (1973-07-01), Asplund
patent: 3757755 (1973-09-01), Carner
Devinsky Paul
Myhre Charles J.
Reagin Ronald W.
Teledyne Industries Inc.
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