Internal-combustion engines – Water and hydrocarbon
Patent
1993-11-10
1996-08-20
Nelli, Raymond A.
Internal-combustion engines
Water and hydrocarbon
F02P 514
Patent
active
055469051
ABSTRACT:
In a multi-cylinder internal combustion engine, an ignition control apparatus for suppressing generation of high-level noise and voltage leakage due to unwanted increases; in spark plug demand voltage. The apparatus includes (i) an angular position signal generator for generating a predetermined angular position signal for each of the cylinders in dependence on the rotation speed of the engine, (ii) sensors for detecting relevant operation states of the engine, (iii) fuel injectors for injecting fuel into the cylinders, (iv) an ignition system for firing a fuel mixture within each of the cylinders, and (v) a controller for generating a fuel injection signal for the fuel injectors and an ignition timing signal for the ignition system. These two signals generated by the controller are generated on the basis of the angular position signal and the engine operation state signal. In accordance with the invention, the controller controls the ignition timing so that, for any cylinder for which application of the fuel injection signal is suppressed, the ignition timing is shifted by a period corresponding to a predetermined crank angle from a top dead center position of the cylinder. Alternatively, the controller can be so designed that the duration of electrical conduction through the ignition coil is controlled by the controller to not exceed a predetermined value for the cylinder for which application of the fuel injection signal is suppressed.
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Mitsubishi Denki & Kabushiki Kaisha
Nelli Raymond A.
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