Electronic control apparatus for an internal combustion engine

Details Electronic control apparatus for an internal combustion engine Electronic control apparatus for an internal combustion engine

1984-09-21

1986-01-21

Gruber, Felix D.

Boots, shoes, and leggings

324166, 364565, 377 51, G05B 1502, G01P 348, F02B 502

Patent

active

045660697

ABSTRACT:
An engine control apparatus includes a microprocessor, a ROM for holding a program required for the operation of the microprocessor, and a RAM for holding data supplied from the microprocessor. Pulse signals representative of results of the arithmetic operations executed by the arithmetic unit on the basis of input signals available from various sensors as well as data stored in the memory in accordance with the program are supplied to actuators for controlling engine operations through an input/output circuit. The control apparatus further includes a counter for counting crank angle pulses produced in synchronism with rotation of the engine shaft, an interrupt request generating circuit for requiring an interrupt to the microprocessor when overflow occurs in the counter. In response to every interrupt request, the microprocessor causes the count value held in the RAM to be incremented by unity. After elapse of a period for measuring the rotational speed of the engine, the count value held in the counter of the input/output circuit is corrected by the number of overflows held in the RAM.

REFERENCES:
patent: 4055993 (1977-11-01), Rackliffe et al.
patent: 4056778 (1977-11-01), Randazzo
patent: 4086470 (1978-04-01), Asbee
patent: 4128892 (1978-12-01), Vasa
patent: 4274142 (1981-06-01), Furuhashi et al.
patent: 4281388 (1981-07-01), Friend et al.

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