Rotation angle measuring apparatus

Details Rotation angle measuring apparatus Rotation angle measuring apparatus

1988-04-11

1989-08-08

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123418, 123476, 123494, 123617, 324208, F02P 515

Patent

active

048542849

ABSTRACT:
A rotation angle measuring apparatus comprises a throttle valve for controlling the amount of air flow of an internal combustion engine, a throttle sensor coupled to a rotation shaft of the throttle valve, and a logic circuit which includes absolute rotation angle detecting means for receiving an output signal of the throttle sensor to produce an absolute signal, forward/reverse rotation direction discriminating means for receiving an output signal of the throttle sensor to produce a direction signal, and an up/down counter for receiving the absolute signal, the direction signal and a count signal outputted from the forward/reverse rotation direction discriminating means to output a signal representative of a rotation position of the rotation shaft of the throttle valve.

REFERENCES:
patent: Re30928 (1982-05-01), Fuzzell et al.
patent: 4378004 (1983-03-01), Petrie
patent: 4485785 (1984-12-01), Hill
patent: 4744343 (1988-05-01), Bisenius et al.
patent: 4773381 (1988-09-01), Koshida
patent: 4783627 (1988-11-01), Pagel et al.
patent: 4791366 (1988-12-01), Suzuki et al.
patent: 4796208 (1989-01-01), Kumagai et al.

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