Computer based engine control with lower priority interrupt requ

Details Computer based engine control with lower priority interrupt requ Computer based engine control with lower priority interrupt requ

1984-05-25

1985-12-10

Gruber, Felix D.

Boots, shoes, and leggings

123417, 36443105, 364900, G05B 1502, G06F 946

Patent

active

045584176

ABSTRACT:
An engine control method and apparatus generally applicable to those control systems of the engine such as an ignition system, fuel injection system, etc., which are controlled to optimum operation in accordance with the engine operating conditions. A plurality of angular pulses are generated during each rotation of the engine and these pulses are counted. In response to each pulse, an angular interrupt request is generated and the interrupt is performed in response thereto. The angular interrupt routines are of the highest priority and are executed irrespective of the execution status of the central processing unit to control an electric device associated with the engine in accordance with control data calculated by the central processing unit. Program interrupt requests are generated during selected angular interrupt routines when the counted number of angular pulses reaches a predetermined value. Program interrupt routines of lower priority than the angular interrupt routines are then executed to calculate the control data for the electric device.

REFERENCES:
patent: 3825902 (1974-07-01), Brown et al.
patent: 3905025 (1975-09-01), Davis et al.
patent: 4152761 (1979-05-01), Louie
patent: 4163282 (1979-07-01), Yamada et al.
Korn: (textbook) Microprocessors and Small Digital Computer Systems for Engineers and Scientists, McGraw-Hill Book Co., 1977, pp. of interest: 2, 141-149,261-267.
Manku: A Microprocessor Implementation of a Fuel Injection System; Second International Conference on Automotive Electronics; London, U.K., Oct. 29 to Nov. 2, 1979, pp. 28-32 of interest.

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