Robert Boschgmbh

Walter Maeurer

Thorsten Allgeier

Guenther Hohl

Hubert Stier

Joerg Heyse

Udo Sieber

Martin Mueller

Siamend Flo

Frank Nitsche

Andreas Plisch

Philipp Rogler

Juergen Graner

Rene Deponte

Olaf Schoenrock

Andreas Gutscher

Friedrich Moser

Anselm Berg

Jurij Giesler

Andrea Krusch

Andreas Krause

Juergen Koreck

Ulrich Doebler

Lena Maren Baessler

Tim Reule

The invention relates to a method for operating a piston pump () which is driven by means of a coil () of an electromagnet. A piston () of the piston pump () can be moved in a cylinder () for pumping purposes by means of the electromagnet. A voltage (U) is applied to the coil () during a switch-on period such that a current flows through the coil () and the piston () is accelerated, said voltage being applied by means of an actuation device (). A time curve of an electric state variable (I, U) of the coil () is qualitatively detected, and the curve or a curve derived therefrom is analyzed in order to detect an impact of the piston () against a stop. The invention further relates to an actuation device and a piston pump.

Operating method and actuation device for a piston pump

The invention relates to a method for operating a piston pump, which is driven by means of a coil () of an electromagnet, wherein a piston () of the piston pump can be moved against a restoring force by means of the electromagnet, wherein a voltage (U) is applied to the coil () during a switch-on duration such that a current (I) flows through the coil () and the piston () is accelerated, wherein two different quenching methods are used for the current (I) in the coil ().

Method for operating a piston pump, control device of a piston pump, and piston pump

The invention relates to a piston pump, in particular for injection systems for motorized two-wheeled vehicles and/or for motorized three-wheeled vehicles, having a compression chamber, a piston, an inlet valve, and an outlet valve. A fluid can flow into the compression chamber via the inlet valve, and the fluid can flow out of the compression chamber via the outlet valve. A region in the form of a channel, which is arranged fluidically upstream of the outlet valve, in particular directly upstream of the outlet valve, has a cross-section which is reduced compared to a compression chamber region at a distance from the outlet valve. The invention is characterized in that a piston end face facing the channel has a region which can be immersed into the channel.

Piston pump comprising a piston with a profiled front face

The present invention relates to a fuel pump () which comprises a pump housing (), a delivery element () for delivering fuel, a heat-generating actuator () for actuating the delivery element (), a first fuel path () which leads from an inlet () to a delivery space (), and a second fuel path () which leads from the inlet () past the heat-generating actuator () to a first housing opening (), wherein the first housing opening () is arranged above the inlet () in the vertical direction (V). The present invention also relates to a fuel pump arrangement which comprises a fuel pump () according to the invention and a fuel tank () in which the fuel pump () is at least partially and preferably entirely arranged. The present invention also relates to a method for operating a fuel pump ().

Fuel pump with improved delivery properties

The present invention relates to a fuel pump for pumping fuel, comprising a piston () and a diaphragm seal element (), which seals on an inner annular seal seat () and an outer annular seal seat (), wherein the following equation is satisfied: (Ra&#x2212;ra)/(ri+L)=ra/ri, where ri is the inner radius of the inner seal seat (), ra is the inner radius of the outer seal seat (), Ra is the outer diameter of the piston () and L is a difference between an outer radius (Ria) of the inner seal seat () and the inner radius (ri) of the inner seal seat (). The invention further relates to a method for operating a fuel pump.

Fuel pump having improved pumping behavior

An injection valve for injecting fuel into a combustion chamber includes: a housing having at least one spray discharge orifice on a discharge side; a solenoid coil; a magnet armature linearly movable by the solenoid coil; a valve needle for opening and closing the spray discharge orifice, which valve needle projects through the magnet armature and is linearly movable along a longitudinal axis, the magnet armature being linearly movable in relation to the valve needle between a first stop and a second stop, the second stop being formed by a stop element having a stop face and a counter element having a counter face situated opposite the stop face, the stop element having an elastic design so that an angle between the longitudinal axis and the stop face is changed when the counter face strikes the stop face.

Injection valve

A fuel injector for the direct injection of fuel into the combustion chamber of an internal combustion engine includes an actuator, which is encapsulated in a first sleeve and is sealed from an inner chamber of the fuel injector; a valve needle actuable by the actuator, which includes a valve-closure member cooperating with a valve-seat surface to form a sealing seat; and a locking spring, by which the valve needle is acted upon in such a manner that the valve-closure member is held in sealing contact at the valve-seat surface. An inflow-side end face of the first sleeve is dimensioned such that a linear deformation of the first sleeve, caused by the fuel pressure present at the inflow-side end face, is compensated by a linear deformation of the actuator and an activating piston extending the actuator.

Fuel injector

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Korntal-Muenchingen, Germany

Walter Maeurer