Robert Boschgmbh

Klaus Rose

Ulrich Kemmner

Karl Ruhl

Gerold Grimm

Peter Ringwald

Heinrich Knapp

Rainer Schillinger

Gregor Schuster

Johann Schmid

Alois Stemmer

Erwin Schmuck

A device is proposed for controlling a flowthrough cross section in a controlled line, in particular in a line carrying operating medium in internal combustion engines, in order to exert influence on the idling rpm of the engine. The device includes an actuation member comprising an immersion-coil magnet system which engages an actuation shaft with which a first valve member and a second valve member are connected. The coaxial guidance of the actuation shaft in the valve housing is effected by means of two guide diaphragms held in place relative to one another by attachment to the housing on their circumference. The valve members are identical in shape and each cooperates with a valve seat provided in a valve plate in the identical direction. The air flow may be effected via inlet apertures provided in the tubular section of the valve housing exhausting via the opened valve seats to outlet apertures in the cap.

Device for controlling a flowthrough cross section in a control line

An adjustment device having a servomotor and arranged for rotary angle adjustment is proposed. The rotary portion is connected via a shaft with a throttle device which controls the cross section of a bypass line bypassing a throttle valve disposed in the intake tube of an internal combustion engine. The adjustment device is axially limited on one end by a cap, which is embodied as a cast part together with a portion of the bypass line. The throttle device is embodied as a rotary slide and with a control portion transversely penetrates the cap and the bypass with the control portion arranged to open the bypass to a greater or lesser extent depending on the position of the rotary slide. Between an armature of the servomotor and the rotary slide, a sealing disc is loosely guided on the shaft. As a result of a pressure drop at the sealing disc, the sealing disc can be pressed against a sealing face of the cap in order to keep the leakage air quantity as small as possible.

Adjustment device for rotary angle adjustment

There is described a pump assembly which, in a unitary structure, comprises an electric pump drive motor and a two stage pump contained within a common housing. The motor drives the first stage of the pump upstream of the second stage which supplies the fuel, by creating a higher output from the first stage, which supply pressure is produced on the suction side of the second stage to maintain the pressure build-up in the pump. An air discharge is provided ahead of the inlet to the suction side of the second stage to dispell gases created in the fuel by the elevated pump pressures.

Two stage pump having an electromotor device

The invention pertains to a fuel system for internal combustion engines in which the unburned, heated fuel which is permitted to flow back to the tank from the fuel metering assembly is deaerated via an apparatus in order to prevent gases from re-entering the fuel supply pump when the fuel is reinduced thereto. By the inclusion of a jet pump between the fuel return line and the induction line, the degree of efficiency of the fuel supply pump is substantially increased.

Fuel system for internal combustion engines

A filter for liquids has a housing, a filtering element accommodated in the housing and having a central tube, and a vibration damper located in the housing and having a membrane, a spring biasing the membrane and a casing arranged to accommodate the membrane and the spring and including a cup-shaped portion which extends into the central tube and receives the spring therein.

Filter for liquids

A procedure and an apparatus are proposed for effectively degassing fuel supply pumps, where the fuel used contains components which vaporize easily at elevated fuel temperatures, and particularly for leading off gas bubbles as they are formed whenever these occur or form in the immediate area of the pump intake. The entire pump and especially the intake area of the pump, which is preferably a roller piston pump, are embodied in open design, with the fuel supply pump arranged perpendicularly and the pumping area located at the bottom, so that gas bubbles forming in the fuel can be carried off before they are introduced into the pump. The pump comprises a base plate with a telescoping rigid tubular member and an intermediate plate screwed onto the base plate, the intermediate plate having an eccentric boring, which encloses the groove disc of the thus-embodied roller piston pump. Further attached to this intermediate plate is a front cover which secures the entire pump area with respect to a housing surrounding the electromotor and has its interior contour so formed that the front cover can assume the functions of the pump. The base plate and the front cover which secure the pump are cut away in the area of the induction groove of the roller piston pump, so that the groove disc and rollers in this area are open. In this way it is possible to divert any gas bubbles which may be formed while they are still in the immediate intake area of the roller piston pump, so that the formation of large bubbles, which would hinder the induction of the liquid fuel, is prevented.

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Mundelsheim, Germany

Klaus Rose