Internal-combustion engines – Spark ignition timing control – Electronic control
Patent
1998-09-28
2000-03-14
Solis, Erick R.
Internal-combustion engines
Spark ignition timing control
Electronic control
12340663, 123617, F02P 500
Patent
active
060358262
ABSTRACT:
A crank angle detecting apparatus for an internal combustion engine includes a crankshaft operationally coupled to pistons. A crank rotor provided on the crankshaft has a plurality of angular segments, each angular segment includes a group of teeth of different lengths as measured in the circumferential direction of the crankshaft, the group of teeth in each angular segment having a distinct combination. A magnetic sensor faces the teeth for detecting passage of the teeth when the crank rotor rotates. An ECU (electric control unit) receives signals from the magnetic sensor and generates a crank angle signal, wherein the crank angle signal changes in accordance with the combination of the teeth. A camshaft includes a first one hundred eighty degree segment and a second one hundred eighty degree segment. The ECU detects rotation of the camshaft for generating a cam angle signal, wherein the cam angle signal indicates which one of the first and second one hundred eighty degree segments corresponds to a currently detected portion of the camshaft. The ECU discriminates the angular position of the crankshaft, which is indicative of the current point in the engine cycle, based on stored changes of the crank angle signal and of the cam angle signal.
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Solis Erick R.
Toyota Jidosha & Kabushiki Kaisha
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