Siemens Aktiengesellschaft

Continental Automotive Gmbh

Wendelin Kluegl

Reda Rizk

Wilhelm Frank

Gerd Schmutzler

Martin Neumaier

Stefan Lehmann

Guenter Lewentz

Gerd Roesel

Hinrich Krueger

A metering device for metering water or an aqueous solution, such as an injector for metering a reducing agent liquid into an exhaust gas stream of a combustion system or an injector for metering water or aqueous solution into a combustion chamber or into an intake manifold of an internal combustion engine. The metering device has an inlet and an outlet for the water or aqueous solution and a shut-off device which is arranged between the inlet and the outlet. At least one electrically operated heating element is arranged in the region of the shut-off device so as to heat and avoid freezing of the liquid.

Device and method for metering water or an aqueous solution in a combustion system

The positioning of the actuating drive in a fuel injector with a piezoactuator () that is screwed into the housing () of the fuel injector is performed by applying a voltage (U) to the piezoactuator () that corresponds to a given idle stroke (h), and the surface grinding of the housing () and base plate () of the piezoactuator () when voltage is applied. Between the housing () of the fuel injector and the housing () of the piezoactuator (), there is also provided a compensation collar () of a suitable thickness.

Procedure for positioning the actuating drive in a fuel injector and device for performing the procedure

The positioning of the actuating drive in a fuel injector with a piezoactor () that is screwed into the housing () of the fuel injector is performed by applying a voltage (U) to the piezoactor () that corresponds to a given idle stroke (h), and the surface grinding of the housing () and base plate () of the piezoactor () when voltage is applied. Between the housing () of the fuel injector and the housing () of the piezoactor (), there is also provided a compensation collar () of a suitable thickness.

Method for producing a compensation collar for an injection valve

The positioning of the actuating drive in a fuel injector with a piezoactor ( ) that is screwed into the housing ( ) of the fuel injector is performed by applying a voltage (U) to the piezoactor ( ) that corresponds to a given idle stroke (h), and the surface grinding of the housing ( ) and base plate ( ) of the piezoactor ( ) when voltage is applied. Between the housing ( ) of the fuel injector and the housing ( ) of the piezoactor ( ), there is also provided a compensation collar ( ) of a suitable thickness.

Method for positioning the actuating drive in a fuel injector device for implementing said method

An injector for an injection system of an internal combustion engine, with an injector head ( ), a nozzle ( ) for injecting fuel, a control unit ( ) for controlling the transfer of fuel from the injector head ( ) to the nozzle ( ) and an actuator ( ) for the mechanical activation of the control unit ( ) in order to control fuel injection, an injector housing ( ), which receives at least the control unit ( ), being integrally formed on the injector head ( ) at the bottom.

Injector for an injection system of an internal combustion engine

An electrohydraulically actuatable injection valve includes a control piston which divides an annular conduit from a control chamber disposed between the control piston and an actuator rod. A spring is disposed between the control piston and the actuator rod. The annular conduit also communicates through a control valve with a drain. If the control valve is closed with the injection valve open, the control piston opens a communication between the annular conduit and the control chamber, so that a nozzle needle is pressed onto an associated valve seat and abruptly stops the injection.

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Seubersdorf, Germany

Wendelin Kluegl