Device for triggering an event in phase with an angular position

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123417, 123480, 36443103, F02P 504, F02P 1700

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active

048992810

ABSTRACT:
An encoder delivers a pulse input signal in phase with equal angular steps of a rotary component, such as a toothed wheel driven by the crankshaft of an internal combustion engine. A missing tooth defines a reference position at which a synchronizing signal is also delivered. A counter is incremented by the pulse input signal and is reset by the synchronizing signal. A comparator compares the count in the counter with a number in a memory circuit to deliver a signal for triggering an event when the count in the counter coincides with the number in the memory circuit. The counter comprises a first counting circuit providing the least significant outputs of the counter and a second counting circuit providing the most significant outputs. The first counting circuit is reset by the input signal, and the second counting circuit by the synchronizing signal.

REFERENCES:
patent: 3725794 (1973-04-01), Asplund
patent: 4233592 (1980-11-01), Leichle
patent: 4321580 (1982-03-01), Deleris
patent: 4324217 (1982-04-01), Ina et al.
patent: 4553426 (1985-11-01), Capurka
patent: 4707791 (1987-11-01), Hmelovsky et al.
patent: 4797827 (1989-01-01), Cockerham

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