Robert Boschgmbh

Theodor Mayr

Otto Bauer

Rudolf Kleeberger

Siegfried Buchta

A fuel injection system for internal combustion engines employing continuous fuel injection into an induction tube. The system includes a regulator which maintains constant fuel pressure upstream of a fuel metering and distribution valve assembly which has individual metering apertures for each injection valve of the engine. A control slide determines the effective cross-section of these metering apertures. The pressure gradient across the metering apertures is held constant by fuel injection valves constructed as flat-seat valves whose movable valve closing member is attached to and guided by a diaphragm. Fuel delivered by the metering and distribution valve tends to open the flat seat valve, permitting fuel to flow through the valve orifice. This opening force is opposed by a single helical control spring, or by a single helical control spring augmented by ambient air pressure. The valve closing member may be provided with a central bore. In that case, an air stream is caused to flow through the central bore under the influence of the pressure differential between the ambient air pressure and the induction tube pressure. This air stream aids in the atomization of the injected fuel.

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Munich, Germany

Theodor Mayr