Boots – shoes – and leggings
Patent
1979-05-25
1981-09-15
Gruber, Felix D.
Boots, shoes, and leggings
123440, 123480, 123489, 123589, F02B 300, F02D 3500
Patent
active
042901073
ABSTRACT:
A signal corresponding to the oxygen concentration in exhaust gas as detected by an O.sub.2 sensor is applied to a control logic circuit after analog conversion. The duty ratio of a pulse signal for keeping the optimum air-fuel ratio corresponding to a running state of an automobile is calculated by the use of the detection signal and in accordance with a program stored in a ROM in advance. The control pulse having the duty ratio is used for the switching control of a solenoid valve for regulating the air-fuel ratio of a mixture.
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patent: 4138979 (1979-02-01), Taplin
patent: 4167163 (1979-09-01), Moder
patent: 4170967 (1979-10-01), Wessel et al.
patent: 4173957 (1979-11-01), Hattori et al.
patent: 4174689 (1979-11-01), Hosaka
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patent: 4235204 (1980-11-01), Rice
McObyn: Microprocessors-Automotive Applications, John Wiley, 1976, pp. 158-161.
Furuhashi Toshio
Hasegawa Taiji
Mouri Yasunori
Suda Seiji
Gruber Felix D.
Hitachi , Ltd.
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