Ignition system for internal combustion engine
An ignition control system is described for an internal combustion engine, comprising: means for detecting engine operating conditions to produce operating condition signals indicative at predetermined intervals of engine crank angle; means for computing engine ignition timing in response to the operating condition signals to produce an ignition timing deciding signal; means for selectively distributing an ignition timing signal to engine cylinders in response to the operating condition signals and the ignition timing deciding signal, including counter means for counting the predetermined interval signals to produce count output signals, and read-only memory means, having address input terminals and output terminals, for: (1) receiving the count output signals and the ignition timing deciding signal, (2) having data present at locations therein corresponding to the signals, (3) reading out a cylinder data corresponding to the received count output signal, and (4) distributing the ignition timing signal through one of the output terminals to a corresponding one of the cylinders, which one cylinder corresponds to the read out cylinder data; reference position sensor means for generating a reference position signal at a specific angular position per every two revolutions of the engine; and angular position sensor means for generating angular signals, equal in number to an integral multiple of a number of the cylinders, per every two revolutions of the engine. The counter means is cleared by the reference position signal to count angular signals of the angular position sensor.
- Assignee:
- Nippondenso Co., Ltd., Kariya
- Patent Number(s):
- US 4681082
- OSTI ID:
- 6233396
- Country of Publication:
- United States
- Language:
- English
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