Abstract: The invention relates to an exhaust-gas aftertreatment device, comprising a control unit (4) for controlling a diaphragm pump (2) that draws a urea/water solution out of a circuit and pumps it, via a pressure filter (3), to a metering unit comprising an atomizing nozzle for atomizing the urea/water solution into an exhaust-gas stream. In advantageous developments, the metering unit comprises a metering valve, including an atomizing nozzle, a pressure and temperature sensor, a heating means and a return baffle.

Abstract: The present invention provides a cam shaft adjuster, which is designed for controlling a double cam shaft, which has a layered construction. The cam shaft adjuster is equipped with a first rotor-type output body and a second rotor-type output body which are arranged parallel to each other with their rotary vane body parts.

Abstract: A camshaft adjusting system for an internal combustion engine has a camshaft adjusting device with a first hydraulic chamber and a second hydraulic chamber, wherein the first and second hydraulic chambers act in opposition to one another. A control valve group working as a 4/4-way valve system has a first connection to the first hydraulic chamber, a second connection to the second hydraulic chamber, a tank connection, and a connection for pressurization. The camshaft adjusting system in a first state of the control valve group, when starting the internal combustion engine, is pressure-relieved relative to the tank connection by simultaneously hydraulically connecting the first and second connections of the camshaft adjusting device so that the camshaft adjusting device moves into a dwell position with a single locking mechanism. The dwell position also provides a safety function in case of system failure.

Abstract: The invention relates to a valve and suitable hydraulic circuit, especially for camshaft adjusters of an internal combustion engine. The hydraulic circuit comprises a number of check valves or two-way valves operating as check valves, in order to provide a rapid camshaft adjuster with a high regulating quality.

Abstract: The invention relates to a valve and suitable hydraulic circuit, especially for camshaft adjusters of an internal combustion engine. The hydraulic circuit comprises a number of check valves or two-way valves operating as check valves, in order to provide a rapid camshaft adjuster with a high regulating quality.

Abstract: A pressure control valve is provided, in particular an electromagnetic pressure control valve, with a magnetic component which has at least one electrical coil and a relocatably supported armature at least partially within the coil. Furthermore, a valve component is provided which comprises a supply, a runback, a load connection and a valve element, in which the valve element in turn has a gate valve and a globe valve.

Abstract: The present invention describes a new rotor and a corresponding method of manufacture for a rotor according to the invention in which a sleeve as a structural component takes over oil guidance functions in addition to locking pin bearing functions, wherein the sleeve can be inserted in a vane of the rotor flush with the surface by means of a press fit.

Abstract: A device for adjusting the valve lift (1) of the valves of a combustion engine comprising a lever (3) being driven by a camshaft (4), pushed against the camshaft (4) by a spring, which cooperates with at least one valve engagement means and is positioned by a positioning means (6).

Abstract: The invention relates to a volume quantity dispensing unit, in particular as a unit for metering an aqueous solution such as a urea/water solution, which can be used in an exhaust gas aftertreatment unit (17), comprising a pressure transducer (1), in particular comprising an electric pressure sensor, the volume quantity dispensing of the volume quantity dispensing unit following an electric signal (2) and the volume quantity dispensing unit being calibrated. There is provided at least one means (3) for changing a pressure value (4), which means changes the pressure value (4) in such a way that the pressure value (4), which is intended to correspond to the pressure in the volume quantity dispensing unit, is an input signal for a volume quantity (5) to be dispensed.

Abstract: A variable mechanical valve control for an internal combustion engine is provided having an underhead camshaft for adjusting a valve stroke and an opening and closing time, making it possible to achieve a very compact transmission gear between the push rod drive and the intake and exhaust valves, to reduce the number of components required for the transmission gear, and to obtain a mechanical, completely variable valve train with an underhead camshaft.

Abstract: A camshaft adjusting system for an internal combustion engine has a camshaft adjusting device with a first hydraulic chamber and a second hydraulic chamber, wherein the first and second hydraulic chambers act in opposition to one another. A control valve group working as a 4/4-way valve system has a first connection to the first hydraulic chamber, a second connection to the second hydraulic chamber, a tank connection, and a connection for pressurization. The camshaft adjusting system in a first state of the control valve group, when starting the internal combustion engine, is pressure-relieved relative to the tank connection by simultaneously hydraulically connecting the first and second connections of the camshaft adjusting device so that the camshaft adjusting device moves into a dwell position with a single locking mechanism. The dwell position also provides a safety function in case of system failure.

Abstract: In order to create a variable mechanical valve control for an internal combustion engine having, in particular, an underhead camshaft for adjusting a valve stroke and an opening and closing time, making it possible to achieve a very compact transmission gear between the push rod drive and the intake and exhaust valves, to reduce the number of components required for the transmission gear, and, in addition, to obtain a mechanical, completely variable valve train with an underhead camshaft, it is proposed that an intermediate lever (7) be linked to a tappet push rod (4) by means of an axle (8) in such a way that a slide gate roller (6), which is rotatably mounted on the axle (8) and driven by the camshaft (1), is moved in a slide gate (9), whereby a first contact surface (10) on the intermediate lever (7) is supported in a reinforced manner by means of a spring (5) on an eccentric shaft (11) or on a second contact surface (12) and a lever (16) can be displaced over an operating curve (13), by means of which the

Abstract: Camshaft adjusters according to the swivel motor principle may be provided with a bar which arrests the rotor in a position relative to the stator. A bar according to the invention is provided with two portions, between which a change of power transmission takes place during the arresting process.

Abstract: In order to produce a variable valve lift device for the lift adjustment of the gas-exchange valves of an internal combustion engine, by means of which with adjustment forces and holding forces, independently from whether said holding forces and adjustment forces are applied mechanically, hydraulically or electrically, with an adjustment of the valve lift being as cost-effective as possible, and with maximum accuracy of the adjustment or control of the valve lift to be taken between the individual cylinders of a multi-cylinder internal combustion engine, and, moreover, the adjustment possibility of the valve lift of the valves of an internal combustion engine with several cylinders is obtained within smallest tolerances, it is suggested that a valve lift device (1) has a rotatable eccentric shaft (3), which consists of several eccentrics (4, 5) and whereby all possible contours of the eccentrics (4, 5) are positioned within a circle, which is formed by means of the external diameters of a bearing (6, 7) of th

Abstract: A filter cartridge for liquid media at risk for freezing employed in fuel cell operated vehicles and internal combustion engines has a housing and a filter lid connected to the housing for closing the housing. A filter insert is inserted into the housing and provided with at least one filter element and terminal parts. The filter element is positioned between the terminal parts. The filter insert also has at least one pretensioning part for axially pretensioning the at least one filter element. At least one reinforcement part is provided that has at least one profiled section. It is inserted into the filter element and receives at least one of torque and axial forces. This prevents twisting of the filter element and improves the sealing action and the filter function.

Abstract: Camshaft adjusters are provided for changing the position of a camshaft of an internal combustion engine. One such camshaft adjuster has a locking position that, with regard to design, is freely selectable.

Abstract: An oscillating motor for a camshaft adjusting device has a stator and a rotor mounted so as to be rotatable relative to one another. The stator has an inner wall and radially extending stator vanes connected to the inner wall. The rotor has a base member and radially extending rotor vanes connected to the base member. The rotor vanes have an end face, respectively, resting against the inner wall of the stator. The stator vanes have an end face, respectively, resting against a peripheral wall of the base member. The rotor vanes taper discontinuously from the end face of the rotor vanes, respectively, in a direction toward the base member so that the rotor vanes each have a widened section at the end face, respectively.

Abstract: Camshaft adjusters which work in accordance with the operating principle of a hydraulic oscillating motor comprise at least two components arranged parallel to one another. Frequently, the two components are a covering plate and a stator. The two components are connected by fasteners which penetrate through one of the two components. At least one of the fasteners is equipped with a central, deformable pin which, in the obstructed state, impedes the nondestructive separation of the two components arranged parallel to one another.

Abstract: The present invention describes a new rotor and a corresponding method of manufacture for a rotor according to the invention in which a sleeve as a structural component takes over oil guidance functions in addition to locking pin bearing functions, wherein the sleeve can be inserted in a vane of the rotor flush with the surface by means of a press fit.

Abstract: A camshaft adjuster for motor vehicles has an oscillating motor having a rotor that is fixedly connected to a camshaft and further having a stator surrounding the rotor. The rotor is rotatable relative to the stator. At least one connecting part acting by at least one of positive engagement and force transmission is provided on a camshaft having cams. The rotor has a base member that is fixedly mounted on the connecting part. The base member has a diameter that is different from a diameter of a circle circumscribing the cams of the camshaft.