Method of and apparatus for controlling vacuum modulating valve

Details Method of and apparatus for controlling vacuum modulating valve Method of and apparatus for controlling vacuum modulating valve

1985-07-12

1987-01-27

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

123569, 361165, F02M 2506

Patent

active

046387846

ABSTRACT:
In controlling a vacuum modulating valve for EGR control, incorporating therein a temperature detecting element, a required drive signal of the vacuum modulating valve, which is obtained in accordance with operating conditions of an engine including an engine speed and an engine load is two-dimensionally corrected in accordance with at least a temperature of the vacuum modulating valve, which is detected by the temperature detecting element, and a driving level of the required drive signal, so that temperature compensation with high accuracy is performed with no use of a current feedback circuit.

REFERENCES:
patent: 4219861 (1980-08-01), Wiegand
patent: 4309759 (1982-01-01), Tokuda et al.
patent: 4388912 (1983-06-01), Kimura et al.
patent: 4445489 (1984-05-01), Kobayashi et al.
patent: 4461263 (1984-07-01), Hasegawa
patent: 4494559 (1985-01-01), Kawamura
patent: 4495929 (1985-01-01), Maeda et al.
patent: 4541398 (1985-09-01), Kishi

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