Method and apparatus for controlling the duty cycle of an off-on

Details Method and apparatus for controlling the duty cycle of an off-on Method and apparatus for controlling the duty cycle of an off-on

1982-08-18

1984-10-09

Gruben, Felix D.

Boots, shoes, and leggings

123438, 123480, 123571, 123589, F02M 716, F02M 904, F02B 502

Patent

active

044765320

ABSTRACT:
An engine control method 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. In this method, an operation starting timing and an operation ending timing of the control system, e.g., in the case of the ignition system, an ignition coil energization starting timing and an ignition timing (an energization ending timing) are computed at each of predetermined computing cycles, and the latest computed ignition timing, for example, which is computed after the coil energization has been started further taking into consideration of the actual coil energization timing and a minimum required energization period is compared with an ignition timing computed in the preceding computing cycle, and a corrective computation of the latest computed ignition timing is carried out depending on the result of the comparison to obtain an optimum ignition timing. Also the history of the ON-OFF state of a bleed valve in an engine air supply system is monitored. The actual duty cycle of the valve is compared with a desired duty cycle to determine whether or not to open the valve for a succeeding time period.

REFERENCES:
patent: 4146000 (1979-03-01), Hattori et al.
patent: 4201166 (1980-05-01), Nishimura et al.
patent: 4217869 (1980-08-01), Masaki
patent: 4303049 (1981-12-01), Ikeura et al.
patent: 4311126 (1982-01-01), Cowles
patent: 4335693 (1982-06-01), Cowles

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