Robert Boschgmbh

Dieter Etzel

Ferdinand Reiter

Martin Maier

Norbert Keim

Franz Thoemmes

Ansgar Seitz

Frank Dallmann

The invention relates to a device for metering fluid, particularly for the metered injecting of a reduction agent into the exhaust tract of an internal combustion engine, which has an electrically controllable metering valve () having a valve housing (), having an inlet opening and a metering opening () for the fluid, and a cooling module () to which a coolant is applied for cooling the metering valve. In order to achieve a permanent fording ability of the device, the metering valve () is hermetically sealed in the cooling module () and only the inlet opening and the metering opening () of the valve housing () are exposed.

Device for metering fluid

A fuel injector that has a valve needle that can be moved axially within a swirl insert and which has, among other things, a valve closing section that works in conjunction with a valve seat. The swirl insert, which has an inner longitudinal opening for the valve needle, has a swirl area having on its downstream end an arrangement for imparting a swirl. The arrangement for imparting swirl are designed in the form of swirl grooves which extend from the conical outer edge to the longitudinal opening and which open out to the lower end face of the swirl insert. The fuel injector is particularly suitable for use in fuel injection systems of internal combustion engines having fuel-air mixture compression and spark ignition

Fuel injection valve

An electromagnetically actuatable valves, including an adjusting bush pressed into a flow bore of a core of a coil in order to adjust a spring force of a restoring spring. The novel adjusting bush includes at least two longitudinal beads, extending in the direction of the longitudinal valve axis on its circumference that protrude past a jacket of the adjusting bush in the radial direction. The transitional region between the jacket and each of the longitudinal beads is embodied as rounded, at least in the direction of the longitudinal valve axis. Thus when the adjusting bush is pressed into the flow bore of the core, the production of chips at the adjusting bush and flow bore is prevented. The adjusting bush is especially well-suited for injection valves of fuel injection systems in internal combustion engines.

Growing community of inventors

Eberdingen, Germany

Dieter Etzel