Title: Fuel injection system

Abstract: A fuel injection system for mixture-compressing, externally ignited internal combustion engines of the type employing continuous fuel injection with an induction tube. A measuring member, as well as an arbitrarily actuatable throttle butterfly valve are disposed in sequence within the induction tube. A fuel metering and quantity distribution valve assembly is controlled by the measuring member in proportion to air flow rate. Pressurized fluid, preferably fuel, provides a restoring force for the measuring member, via a control pressure circuit. At least one pressure control valve is provided for controlling the pressure in the control circuit in dependence on motor parameters. A heatable control element, operating in dependence on temperature, forms part of the control valve. The heatable control element, which may be a bimetallic spring, acts in opposition to the force of another spring. Instrumentalities are provided for reducing the pressure of the pressurized fluid in the control pressure circuit during the warm-up phase when the engine is suddenly accelerated.

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Inventors: Stumpp, Gerhard (Stuttgart, DT)
Michel, Friedbert (Kornwestheim, DT)
Steiner, Josef (Esslingen, DT)

Application Number: 538404
Filing Date: 1975-01-03
Publication_date: 1976-08-17
Assignee: Robert Bosch G.m.b.H. (Stuttgart, DT)
Primary Class(es): 123/453 123/454, 123/455
Other Classes:
US Patent Ref:

3730155	May, 1973	Knapp	123/139.
3791359	Feb, 1974	Eckert et al.	123/119.
3835828	Sep, 1974	Knapp	123/119.
3842813	Oct, 1974	Eckert	123/119.

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