Robert Boschgmbh

Stefan Kampmann

Franz Rieger

Gernot Wuerfel

Nestor Rodriguez-Amaya

Uwe Gordon

Ralf Maier

Detlev Potz

Guenter Lewentz

Bernd Dittus

Andreas Kreh

A fuel injector having an integrated spark plug for injecting fuel directly into a combustion chamber of an internal combustion engine and for igniting the fuel that is injected into the combustion chamber has a valve body, which, together with a valve-closure member, forms a sealing seat. Disposed contiguously to the sealing seat is a discharge orifice, which discharges at a valve-body end face facing the combustion chamber. Provision is also made for a housing body that is insulated from the valve body, and for an ignition electrode that is connected to the housing body. In this context, a spark arc-over is produced between the valve body and the ignition electrode. The ignition electrode and the valve body are formed so that the spark arc-over occurs between the end face of the valve body facing the combustion chamber and the ignition electrode. In the vicinity of the discharge orifice, the ignition electrode has an edge to reproducibly define the position of the spark arc-over at the end face of the valve body with respect to the position of the discharge orifice.

Fuel injector having integrated spark plug

A fuel injector having an integrated spark plug ( ) for injecting fuel directly into a combustion chamber ( ) of an internal combustion engine and for igniting the fuel that is injected into the combustion chamber ( ) has a valve body ( ), which, together with a valve-closure member ( ), forms a sealing seat. Disposed contiguously to the sealing seat is a discharge orifice ( ), which discharges at a valve-body ( ) end face ( ) facing the combustion chamber ( ). Provision is also made for a housing body ( ) that is insulated from the valve body ( ), and for an ignition electrode ( ) that is connected to the housing body ( ). In this context, a spark arc-over is produced between the valve body ( ) and the ignition electrode ( ). The ignition electrode ( ) and the valve body ( ) are formed in such a way that the spark arc-over takes place between the end face ( ) of the valve body ( ) facing the combustion chamber ( ) and the ignition electrode ( ). In the vicinity of the discharge orifice ( ), the ignition electrode ( ) has an edge ( ) in order to reproducibly define the position of the spark arc-over at the end face ( ) of the valve body ( ) with respect to the position of the discharge orifice ( ).

Fuel injection valve with integrated spark plug

A fuel injection nozzle or fuel injector valve has a nozzle body, extending along a longitudinal axis, on which is configured a valve seat surface which coacts with a valve closure surface configured on a valve closure element to form a valve seat. At least one fuel stream, which has a radial directional component with respect to the longitudinal axis of the nozzle body, is sprayed out when the fuel injection valve or fuel injector nozzle is in an open state. A sleeve body axially overlaps the fuel stream in the direction of the longitudinal axis. The sleeve body has at least one impact surface which the fuel stream strikes. The impact surface is inclined at a predefined angle with respect to a vertical plane which runs vertically with respect to the longitudinal axis, and/or the impact surface is structured in fluted fashion on its surface.

Fuel injection device

Fuel injection device for internal combustion engines

Growing community of inventors

Bamberg, Germany

Stefan Kampmann