Robert Boschgmbh

Nello Medoro

Antonio Diaferia

Pietro De Carlo

Jochen Aleker

Michael Hackner

Bernd Frey

Christos Hondros

Marco Lamm

Giuseppe Ficarella

Charlotte Summerer

Bjoern Noack

Daniel Zander

Daniele De Gennaro

Antonio Grimaldi

Vito Spinelli

Antonio Scamarcio

Benedetto Loiacono

Mauro De Bellis

Thomas Riedel

Werner Striegel

Ciro Medolla

John Kuesters

Antonio De Benedictis

Manuel Tavani

Mariacarmela Masellis

Ruggiero Gissi

Giancarlo Magrone

Salvatore Palmisano

The invention relates to a method for operating a fuel injection system () for supplying a combustion engine of a vehicle with fuel, in which method the fuel is conveyed at high pressure with the aid of a high-pressure pump (), fed to a high-pressure accumulator (), and injected into a cylinder of the combustion engine with the aid of at least one injector connected to the high-pressure accumulator (). In order to detect any damage to the drive of the high-pressure pump (), according to the invention The invention further relates to an electronic control unit for carrying out the method.

Method for operating a fuel injection system for supplying a combustion engine with fuel, and electronic control unit

Unclogging group for unclogging a filter of a pumping group for pumping diesel to an internal combustion engine, the unclogging group comprising: &#x2014;a metering unit comprising an electromagnetic head and a control valve for controlling the diesel flow; &#x2014;a filter associated with the control valve made at least in part of metallic material; &#x2014;a temperature sensor for measuring the ambient temperature; &#x2014;a control unit coupled to the temperature sensor; &#x2014;an electrical circuit controlled by the control unit for supplying electrical current to the filter; wherein the control unit is configured so once received the starting input of the pumping group it compares the temperature measured by the temperature sensor with a threshold value, and if the temperature measured by the temperature sensor is less than the threshold value the control unit commands a delay of the starling of the pumping group of a period wherein the control unit supplies electrical current to the electrical circuit connected to the filter.

Group and method for unclogging a filter of a pumping group for pumping diesel to an internal combustion engine

An electric gear pump comprising: a gerotor rotatable about an axis of rotation A; a support base for the gerotor; a cover which can be joined to the base; a feed duct and a delivery duct; electronic components of the control unit which are fastened on the outer surface of the cover; wherein the feed and delivery ducts are at least partly formed in the cover and comprise an axial section parallel to the axis A and a radial section parallel to the outer surface of the cover; wherein the outer surface of the cover comprises an inset portion; wherein at least a portion of the radial sections of the feed and delivery ducts is configured so as to project externally from the inset portion of the outer surface of the cover and form projecting support portions for the electronic components of the control unit.

Electric gear pump

A metering valve for a pump unit for feeding fuel from a tank to an internal combustion engine; the metering valve having: a sleeve having an axis A and provided with a first open end for receiving a thruster, a second opposite end provided with an opening for axially discharging the fuel and at least one side opening for feeding fuel; a plug-shaped piston housed slidably along the axis A inside the sleeve, the piston being provided with a closed end having an outer surface in contact with the thruster, an open opposite end and at least one side opening; a plug housed inside the discharge opening of the sleeve and provided with an axial opening; a spring arranged between the plug and the inner surface of the closed end of the sleeve.

Metering valve for a pump unit for feeding fuel to internal combustion engine and pump unit comprising such a valve

Unclogging group for unclogging a filter of a pumping group for pumping diesel to an internal combustion engine, the unclogging group () comprising: &#x2014;a metering unit () supplied by diesel leaving a low pressure pump and configured for feeding in a controlled manner the diesel to a high pressure pump; the metering unit () comprising an electromagnetic head () provided with a coil () and a control valve () for controlling the diesel flow; &#x2014;a filter () associated with the control valve (); &#x2014;a temperature sensor () for measuring the ambient temperature; &#x2014;a control unit () coupled at one side to the temperature sensor () and at another side to the coil (); wherein the control unit () is configured so that once it has received the starting input of the pumping group it compares the temperature measured by the temperature sensor () with a threshold value, and if the temperature measured by the temperature sensor () is less than the threshold value the control unit () commands a delay of the starting of the pumping group of a period wherein the control unit () supplies electrical current to the coil ().

Apparatus and method for unclogging a filter of a pumping group for pumping diesel to an internal combustion engine

A pumping unit has a fuel storage tank (), a piston pump () for feeding the fuel to an internal combustion engine (); a gear pump () for feeding the fuel from the storage tank () to the piston pump (), and a hydraulic circuit () which connects together the storage tank () and the internal combustion engine (), extends through a pump body () of the piston pump () so as to lubricate an actuating shaft () of the piston pump () and has a collection branch () for collecting the fuel leaks resulting from the lubrication of said actuating shaft (); the collection branch () being connected to an intake () of the gear pump () so as to lubricate an actuating shaft () of the gear pump () with the fuel from said collection branch ().

Pumping unit for feeding fuel, preferably diesel fuel, from a storage tank to an internal combustion engine

A high-pressure pump for supplying fuel to an internal-combustion engine has a pump body and an actuating shaft which extends along a longitudinal axis and which is supported rotatably about the longitudinal axis by the pump body. The shaft has an eccentric portion and a prismatic jacking end. A first pumping station has a gear engaged with the prismatic jacking end and a second pumping station has at least one piston. The piston is slidable relative to the pump body transversely with respect to the longitudinal axis and is actuated by the eccentric portion of the actuating shaft. The prismatic jacking end is made of a harder material than the material with which the remainder of the actuating shaft is made.

High-pressure pump for supplying fuel to an internal-combustion engine

A fuel safety valve arranged in a fuel supply line between a low-pressure pump and a high-pressure pump, is provided with a valve body which defines a cylindrical cavity having a longitudinal axis and being connected to a duct and a portion of a discharge duct in communication with the cylindrical cavity, a piston sliding with respect to the valve body in the cylindrical cavity along the longitudinal axis, and a spring housed in a variable-volume chamber defined by a portion of the cylindrical cavity between the piston and a closure element. The piston is provided with a through hole supplied with the fuel leading into the variable-volume chamber, and the valve body being provided with a fuel discharge hole connecting the variable-volume chamber to the discharge duct.

Safety valve and high-pressure pump comprising said safety valve

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Trinitapoli, Italy

Nello Medoro