Title: Fuel metering and injection system for internal combustion engines

Abstract: A fuel preparation system for an internal combustion engine employs an induction tube air flap which is shaped so as to be subject to aerodynamic lift forces when the air flow has caused a substantial displacement of the flap. In addition, the wall of the induction tube is made inwardly movable so that the net cross section available to the air flow may be reduced and a proportionately greater deflection rate obtained. The fuel quantity, which is related to the angular deflection is thus increased, causing a richer mixture. The air flap has internal channels which carry fuel from the pivotal shaft to the induction tube for injection into the air stream.

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Inventors: Holzbaur, Siegfried (Stuttgart, DT)

Application Number: 727702
Filing Date: 1976-09-29
Publication_date: 1977-12-27
Assignee: Robert Bosch GmbH (Stuttgart, DT)
Primary Class(es): 123/455 123/457, 261/44.1, 261/44.2
Other Classes:
US Patent Ref:

110651	Nov, 1917	Billon-Grand	261/44.
1555489	Sep, 1925	Spencer et al.	261/44.
3711068	Jan, 1973	Perry	261/44.
3777725	Dec, 1973	Stumpp et al.	123/119.
3880125	Apr, 1975	Kammerer et al.	123/32.

Other Refs:
Primary Examiner: Myhre, Charles J.
Assistant Examiner: Nelli, R.
Attorney: Greigg; Edwin E.