Title: Supplementary air valve for a fuel supply apparatus

Abstract: A supplementary air valve controlling a supplementary air quantity during the warm-up phase of an internal combustion engine. The supplementary valve is arranged in a lateral channel which bypasses the throttle valve and has a flat vane provided with a flow-through aperture; the vane is pivotable about a shaft eccentrically situated with respect to the flow-through aperture by means of a bimetallic spring provided with an electric heating coil energized through the engine ignition switch and which rotates the vane to uncover the cross-sectional areas of two spaced-apart, coaxially arranged air supply tubes which together form a part of the lateral channel and the vane has at least one further flow-through aperture for opening the cross-sectional area of a pressure control line which when closed, permits the induction tube pressure downstream of the throttle valve to prevail in the air control line, and when opened, the induction tube pressure upstream of the throttle valve prevails in the air control line.

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Inventors: Schwartz, Reinhard (Stuttgart, DE, US)
Schelhas, Peter (Stuttgart, DE, US)

Application Number: 963711
Filing Date: 1978-11-27
Publication_date: 1980-04-15
Assignee: Robert Bosch GmbH (Stuttgart, DE)
Primary Class(es): 123/587 123/588, 261/39.2
Other Classes:
US Patent Ref:

4136651	Jan, 1979	Hattori	123/119.
4148848	Apr, 1979	Ogita	123/124.

Other Refs: 1427981

Mar, 1976	GB

Primary Examiner: Lazarus, Ronald H.
Assistant Examiner:
Attorney: Greigg; Edwin E.