Crank angle detection device and ignition timing control device for internal combustion engine

Abstract

The present invention provides a crank angle detection device and an ignition timing control device for an internal combustion engine. The crank angle detection device includes: a rotor that rotates in conjunction with a crankshaft of the internal combustion engine and has a plurality of detected parts at equal angular intervals on the outer periphery; The pick-up that generates a pulse signal each time the detected portion passes near the outer circumference of the rotor uses the detected portion located before the crank angle corresponding to the top dead center of the piston of the internal combustion engine among the plurality of detected portions for the crank Reference angle detection for corners.

Description

technical field [0001] The invention relates to a crank angle detection device and an ignition timing control device of an internal combustion engine. Background technique [0002] In the case of controlling the fuel injection timing for injecting and supplying fuel to the internal combustion engine through the nozzle or the ignition timing for spark discharge to the spark plug, the rotational angle position, that is, the crank angle is detected from the reference position of the crankshaft of the engine, and the crank angle is set based on the crank angle. set these timings. [0003] In a crank angle detection device for detecting the rotation angle of a crankshaft of an internal combustion engine, a disk-shaped rotor that rotates in accordance with the rotation of the crankshaft and an electromagnetic pickup provided near its outer periphery are used. Protrusions or recesses made of a plurality of magnetic materials are provided at every predetermined angle as detected po...

AI Technical Summary

Problems solved by technology

[0005] However, in the ignition timing control device using the crank angle detection device of the related prior art, since the crank angle cannot be correctly determined until the crankshaft makes one revolution, there is a problem that the reverse rotation of the engine cannot be avoided when the crankshaft is manually turned by the internal combustion engine and Problem with not giving proper initial detonation timing

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