Robert Boschgmbh

Thomas Wieland

Hans-Peter Braun

Stephan Kleppner

Michael Kuehn

Stefan Woerz

Christian Ast

Winfried Eckart

Ludger Kuermann

Werner Schneider

Pavel Motka

Petr Simek

Willi Strohl

Peter Schelhas

Paul Mason

Erich Eiler

Hans-Joerg Fees

Christian Pankiewitz

Martin Ptacek

Wolfgang Gabauer

Oliver Wahl

Alexander Hero

Ansgar Seitz

Martin Sykora

Martin Kling

Gerald Zierer

Oliver Schulz

Martin Friedrich

Roberto Scarfone

Erwin Franieck

Joachim Breidert

Christoph Benz

Matthias Kirner

Juergen Weikert

Ralph Leonard Fung

Franz Hacker

Erik Hahmann

David Liskovec

John Lennen

Tomas Slanec

Daniel Siska

Josef Jagos

Daniel Pridal

Roman Snejda

Martin Beyer

Lars Hermann

Wolfgang Wettemann-Del Chin

Petr Siegel

Knut Wyrwa

The invention relates to a side-channel compressor () for a fuel cell system () for conveying and/or compressing a gas, particularly hydrogen, comprising a housing (), the housing () comprising a housing upper part () and a housing lower part (), a compressor chamber () located in the housing (), comprising at least one peripheral side channel (), a compressor wheel () arranged in the housing (), which is rotatably arranged about an axis of rotation (), the compressor wheel () comprising blades () arranged on the periphery thereof in the region of the compressor chamber (), and respectively a gas inlet () embodied in the housing and a gas outlet () which are fluidically interconnected by means of the compressor chamber (), particularly the at least one side channel (). According to the invention, the compressor wheel () comprises a peripheral stop ring () on the periphery thereof, which extends around the compressor wheel () in a rotationally symmetric manner in relation to the axis of rotation ().

Side-channel compressor for a fuel cell system for conveying and/or compressing a gaseous media

A method for controlling a pressure () in an injection system () for an engine () of a vehicle () comprises the following steps: determining whether the vehicle () is decelerating; reducing the delivery rate of a high-pressure pump () that supplies fuel to the injection system (); reducing the pressure in the injection system () to a standstill pressure (p) by means of idle operation of the engine (); estimating a standstill time (t) at which the vehicle () comes to a standstill; and reducing the delivery rate of the high-pressure pump () before the standstill time (t) is reached, such that the standstill pressure (p) is attained in the injection system () at the standstill time (t).

Controlling the fuel pressure in an injection system

In known devices for pumping fuel, suction jet pumps are used which are driven by the fuel flowing back from the internal combustion engine and pump fuel from a supply tank into an impoundment container of a fuel pumping unit. In known suction jet pumps, the suction power is limited by the fact that the fuel stream applies itself to the housing wall, so that the entire area of the fuel stream is no longer available for entraining fuel. The device of the invention lessens this effect by providing at least one rib between the first partial section of the fuel line and the mixing conduit.

Suction jet pump with ribs for guiding the flow of fuel

A devices for pumping fuel has at least one suction jet pump and a drive line, supplying the suction jet pump with fuel, that branches off from a pressure line leading to an internal combustion engine and that can be blocked off by means of a shutoff valve. By means of a shutoff valve, it is possible to switch off the suction jet pumps. The pressure of the pressure line acts on the shutoff valve in such a way that the shutoff valve closes at a pressure that is greater than or equal to a predetermined closing pressure.

Device for pumping fuel

A device for delivering fuel having a delivery unit, a main filter with a filter housing situated downstream of the delivery unit, and a drive line for driving a suction jet pump embodied in the filter housing of the main filter. As a result, the assembly and manufacture costs of the device are reduced.

Device for delivering fuel from a tank to an internal combustion engine

A fuel supply system is provided for delivering fuel from a tank to an engine of a motor vehicle through a fuel line. The system is provided with a pressure relief valve to divert fuel from the fuel line during engine shut down conditions when fuel flow to the engine is not desired. The pressure relief valve has a fuel outlet that is provided with backpressure during engine operation. The backpressure enables the pressure relief valve to be set at a lower level because the backpressure is added to set point pressure to determine opening of the pressure relief valve. Lowering the set point of the pressure relief valve allows fuel to be diverted from the engine at a lower fuel line pressure. In one embodiment backpressure is provided by fluid communication from a jet pump supplying fuel from the fuel tank to a fuel system reservoir.

Fuel system with pressure regulation and pressure relief

The fuel supply apparatus according to the invention is improved in a simple manner in that it is provided with short fuel lines. According to the invention, the drive line of the suction jet pumps is connected to a pressure line downstream of the fuel supply pump and has at least one check valve or a siphon.

Apparatus for delivering fuel from a tank to an internal combustion engine

Known apparatuses for pumping fuel have at least two suction jet pumps, which each have one drive nozzle and one collection conduit and mixing conduit located downstream of the drive nozzle. A disadvantage is that the parallel suction jet pumps require a large amount of installation space, are embodied very massively, and therefore require a large amount of injection-molding compound for their manufacture. In the apparatus of the invention, the production costs and the required installation space for the suction jet pumps are reduced. According to the invention, the drive nozzles are surrounded by a single collection conduit, narrowing conically in the flow direction and located upstream of the mixing conduits.

Apparatus for pumping fuel

The flow pump has an impeller, driven in a pump chamber and having a ring of blades spaced apart from one another in the circumferential direction on at least one end face and ending at the face end of the impeller and cooperate therewith to define blade chambers. In the pump chamber, at least one feed conduit in the form of a split ring cooperates with the ring of blades on the impeller, and at least one intake opening discharging into the feed conduit is embodied in a pump chamber wall that defines the pump chamber in the direction of the pivot axis of the impeller. In an initial region at the at least one intake opening and/or in the circumferential direction of the impeller, adjoining the impeller, the feed conduit extends radially farther inward than the blade chamber bottom of the impeller, and the transition between a radially inner blade chamber bottom of the blade chambers and the associated face end of the impeller has a chamfer or rounded corner.

Pump for pumping fuel from a tank to an internal combustion engine of a motor vehicle

A fuel delivery device having a collecting receptacle disposed inside a storage tank and from which a delivery unit aspirates fuel and delivers it to an engine. A jet pump which delivers the fuel from the storage tank into the collecting receptacle is disposed close to a bottom of the collecting receptacle and feeds fuel into it through an ascending line that extends up into the vicinity of the upper rim of the collecting receptacle. A separate component is disposed on the outside of a peripheral wall of the collecting receptacle. The outside of the peripheral wall and/or the side of the component oriented toward the peripheral wall has an open channel. The component is tightly connected to the peripheral wall to cover the open channel and to form the ascending line. The collecting receptacle and the component can be easily produced along with the open channel and the component can be attached to the collecting receptacle with a minimum of effort.

Device for transporting fuel from a reservoir to an internal combustion engine

A fuel delivery device including a closure element, which closes an opening of a fuel tank and has a cup-shaped receptacle, which opens toward the outside of the fuel tank, contains the fuel filter, and can be closed by a cover element, which can be detachably fastened to the closure element. An elastic sealing ring, which is clamped between the closure element and the cover element, seals the receptacle. In the vicinity of the sealing ring, the closure element has at least one opening via which the receptacle communicates with the interior of the fuel tank. When the cover element is fastened onto the closure element, the sealing ring, starting from a non-deformed original shape, is elastically deformed in such a way that it closes the at least one opening. When the cover element is detached from the closure element, the sealing ring returns to its original shape in which it unblocks the at least one opening. This produces a pressure relief into the interior of the fuel tank when the cover element is detached.

Fuel supply device of an internal combustion engine with a fuel filter

Growing community of inventors

Stuttgart, Germany

Thomas Wieland