Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1992-06-26
1993-11-23
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Fuel injection system
123487, 123612, F02D 4130, F02P 7077
Patent
active
052634507
ABSTRACT:
A control apparatus can electronically control the operation of a multi-cylinder engine in a precise manner. A first signal generator 1 and a second signal generator 2 are provided on a camshaft operatively connected with a crankshaft for generating a cylinder identifying signal SC and a reference position signal ST, respectively, in synchronism with the rotation of the camshaft. A pulse signal generator 6 or 12 is provided on a crankshaft for generating a pulse signal P of a high frequency in synchronism with the rotation of the crankshaft. The reference position signal ST contains a series of pulses each indicative of a first and a second reference position for each cylinder which are modified by counting the number of pulses in the pulse signal P to provide exact reference positions. A microcomputer 5 or 15 controls the engine based on the exact reference positions of each cylinder thus obtained. In a modified form, instead of two signal generators 1, 2, a single signal generator 11 is employed which is provided on the camshaft for generating a single signal SCT which contains a series of pulses having different pulse widths corresponding to different cylinders. The signal SCT and the pulse signal P are input via an AND gate 17 to a counter 16 where the number of pulses in the pulse signal P during the pulse width of each pulse of the SCT signal is counted for cylinder identification.
REFERENCES:
patent: 4309973 (1982-01-01), Tamura
patent: 4457286 (1984-07-01), Katayama et al.
patent: 5060614 (1991-10-01), Uchimi et al.
Hashimoto Atsuko
Iwata Toshio
Dolinar Andrew M.
Mitsubishi Denki & Kabushiki Kaisha
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