Abstract: A fuel injector for fuel injection systems of internal combustion engines, in particular for direct injection of fuel into the combustion chamber of an internal combustion engine, is described, including a solenoid, an armature, which is acted upon by the solenoid in a closing direction by a return spring, and a valve needle, which is connected to the armature in a force-locked manner for actuation of a valve closing body, which together with a valve face forms a sealing seat. An adjusting element for adjusting the spring force of the return spring is situated in a connector sleeve which provides the fuel feed on the inlet side. The adjusting element is delimited toward the outside by a thin-walled sleeve, into which a disk-shaped throttle element having a throttle borehole is introduced as a separate insert part.

Abstract: A fuel injector for fuel injection systems of internal combustion engines, in particular for direct injection of fuel into the combustion chamber of an internal combustion engine, is described, including a solenoid, an armature, which is acted upon by the solenoid in a closing direction by a return spring, and a valve needle, which is connected to the armature in a force-locked manner for actuation of a valve closing body, which together with a valve face forms a sealing seat. An adjusting element for adjusting the spring force of the return spring is situated in a connector sleeve which provides the fuel feed on the inlet side. The adjusting element is delimited toward the outside by a thin-walled sleeve, into which a disk-shaped throttle element having a throttle borehole is introduced as a separate insert part.

Abstract: A method of and apparatus for controlling the reducing agent in an exhaust gas aftertreatment system of an internal combustion engine with an exhaust gas duct in which an SCR catalyst is provided in the direction of flow of the exhaust gas. A reducing agent-generating system (RGS) comprising an NOx and CO/H2 production unit as well as a combined NOx storage/ammonia production unit in the standard gas path of the reducing agent-generating system. Ammonia is delivered upstream from the SCR catalyst to reduce nitrogen oxides, starting materials for producing the ammonia being fed at least in part to the NOx and CO/H2 production unit via a fuel inlet and an air inlet. An AGC matrix of the combined NOx storage/ammonia production unit is cooled at least intermittently by means of an inner and/or outer cooling device.

Abstract: A method of and apparatus for controlling the reducing agent in an exhaust gas aftertreatment system of an internal combustion engine with an exhaust gas duct in which an SCR catalyst is provided in the direction of flow of the exhaust gas. A reducing agent-generating system (RGS) comprising an NOx and CO/H2 production unit as well as a combined NOx storage/ammonia production unit in the standard gas path of the reducing agent-generating system. Ammonia is delivered upstream from the SCR catalyst to reduce nitrogen oxides, starting materials for producing the ammonia being fed at least in part to the NOx and CO/H2 production unit via a fuel inlet and an air inlet. An AGC matrix of the combined NOx storage/ammonia production unit is cooled at least intermittently by means of an inner and/or outer cooling device.