Abstract: A variable coolant pump for a cooling circuit of an internal combustion engine. The variable coolant pump includes a pump head having an inlet, an annular channel and an outlet; a pump housing rotatably supporting a pump shaft having an axial end; a pump blade wheel mounted on the axial end of the pump shaft and disposed in the pump head; and a plurality of adjustable guide blades arranged concentrically about the pump blade wheel between the annular channel and the pump blade wheel. Each adjustable guide blade has two longitudinal sides and outer edge and includes a first pivot, a second pivot and a third pivot. The first and second pivots extend at right angles to a respective one of the two longitudinal sides in a vicinity of the outer edge. The first and second pivots define an axis of rotation and rotatably support the respective guideblade in the pump head about the axis of rotation.

Abstract: A device for phase-shifting a rotational angle of a drive wheel relative to an output shaft. The device includes a planetary gear including a sun wheel, a hollow wheel and at least one planet wheel, wherein the sun wheel and the hollow wheel mesh with the at least one planet wheel. A planet wheel carrier having the at least one planet wheel is arranged thereon and is fixedly connected to the output shaft so as to commonly rotate with the output shaft. A drive wheel is connected to the planetary gear and is at least indirectly connected to the sun wheel. An actuator engages the planetary gear so that the hollow wheel is rotatable relative to the sun wheel. The actuator is disposed tangentially to the planetary gear and includes a worm engaging an outer toothing of the hollow wheel, with the sun wheel being at least indirectly connected to the drive wheel.

Abstract: A device for the reduction of nitrogen oxides in the exhaust gas of internal combustion engines has a thermolysis reactor (10). In the thermolysis reactor (10), urea is converted into ammonia and isocyanic acid by means of the supply of heat. In a preferred embodiment of the invention, the thermolysis reactor (10) is arranged within the exhaust gas duct (26) and is thermally coupled to an oxidation catalytic converter (30) which is connected upstream of the thermolysis reactor (10) in the flow direction. As a result of the exothermic reactions taking place in the oxidation catalytic converter (30), it is possible for heating of the thermolysis reactor (10) to take place. In order to further increase the temperature, it is possible for fuel to be injected into the oxidation reactor (30) by means of a fuel supply device. The fuel is burned catalytically in the oxidation catalytic converter (30).

Abstract: An exhaust gas recirculation system for an internal combustion engine. The system includes an exhaust gas recirculation valve disposed in an exhaust gas recirculation channel. A first exhaust gas cooler is disposed in the exhaust gas recirculation channel. A turbine is disposed in the exhaust gas recirculation channel downstream of the first exhaust gas cooler relative to a flow direction of an exhaust gas. A control valve is disposed in at least one of a region of an exhaust gas manifold and an exhaust gas channel.

Abstract: An actuating device including a housing that is closed by a cover in such a way that both an electric motor and a gearbox unit are completely enclosed. An internal gear segment, arranged on an output shaft in a rotationally fixed manner, is positioned on a borehole of the cover. An axle on which a double toothed gear is arranged is then mounted on the output side, an a pocket hole in the cover. This reduces the overall length, as well as the number of components and the cost.

Abstract: Previous heat transmission units have only low cooling efficiencies in case of small fluid mass flows. According to the invention, it is proposed to configure a heat transmission unit (1) in such a manner that a channel (4) conducting the fluid to be cooled is separated, by a partition wall (14;23,24;29,30), into at least two separated partial channels (15,16), a first one of these channels being adapted to be shut off by a shut-off means (21;27;31) arranged at a first partial fluid inlet (17) of this channel. Preferably, in spite of the closed condition of this inlet cross section, full use is made of the existing cooler surface in that there is effected, by suitable arrangement of the partition walls (14;23,24;29, 30) and by further shut-off means (28;32), a deflection of the fluid mass flow in the heat transmission unit (1).

Abstract: The invention relates to an electric fluid pump with a semi-axial construction, in which a motor housing part (9), situated at the pressure end, has a conduction device (42). The conduction device (42) allows an almost completely irrotational flow to be achieved so that the kinetic energy of the tangential component of the flow velocity is converted into pressure energy with negligible friction losses. This feature of the invention increases the efficiency of the fluid pump. The dimensions of the electric motor can therefore be reduced while maintaining the same delivery quantity.

Abstract: The invention relates to a throttle plate port whose pivot axis is disposed so as to be axially offset with respect to the throttle plate and whose radial peripheral surface is shaped, at least by sections, in the form of spherical sectors, where in the position which closes the bore the peripheral surface of the throttle plate abuts, in the form of a line, the seat face of the housing. Through this type of eccentric disposition and simultaneous realization of the peripheral surface, the housing can be realized without undercuts and nonetheless precise dosing can be achieved in the case of small pivot angles.

Abstract: The invention relates to an electric fluid pump with a semi-axial construction, wherein the pump housing (32, 33, 34) has at least two identical pump housing parts (33, 34). This feature of the invention reduces the number of different components required to manufacture the electric fluid pump and thus reduces costs while achieving a high operating efficiency.

Abstract: Heat transmission unit are known wherein ribs (14) for improving the cooling efficiency extend along the whole length of the flow path of the radiator. According to the invention, it is proposed, while keeping the constructional space at the same size, to provide a larger cooling surface in a first portion (9) which has a higher temperature gradient, which is accomplished by a large number of ribs (14) arranged therein, and to omit such ribs or to reduce their number in a region which has a lower temperature gradient, i.e. in a second portion (12). In this manner, the overall efficiency of such a heat transmission unit is improved.

Abstract: A cooling device is proposed that can be produced by the diecasting process, and which has a heat-transfer unit surrounded by an outer shell, wherein a jacket through which coolant flows is formed between the heat-transfer unit and the outer shell, said jacket is subdivided by webs in such a way that a passage through which coolant flows is formed between the outer shell and the outer casing of the heat-transfer unit. To this end, the webs are arranged in such a way that this circulating flow is effected in a meander shape. Compared with a spiral flow, this results in degrees of freedom with regard to the arrangement of the coolant inlets and coolant outlets. Furthermore, such cooling devices can be produced and assembled in a cost-effective manner and have a high efficiency.

Abstract: An exhaust-gas cooling device (1) for an internal combustion engine comprises a housing (2) with an exhaust-gas inlet (3), an exhaust-gas outlet (4), a valve device (5), and a U-shaped heat exchange unit (6) including an outbound flow path (7) and a return flow path (8). The housing (2) comprises, on the open side of the U-shaped heat exchange unit (6), a first (9), a second (10) and a third chamber (11). Said first chamber (9) provides a fluid connection from the exhaust-gas inlet (3) to said second chamber (10), and said third chamber (11) provides a fluid connection from said second chamber (10) to the exhaust-gas outlet (4). The valve device (5) is arranged in said second chamber (10) such that said second chamber (10) can be divided into two partial chambers (17;18), a first one (17) of said partial chambers (17;18) being arranged in fluid connection with the outbound flow path (7), and the second one (18) of said partial chambers (17;18) being arranged in fluid connection with the return flow path (8).

Abstract: Proposed is an exhaust-gas recirculation device comprising a distributor element (14) being driven corresponding to the rotational speed of the camshaft (11) of an internal combustion engine (1), wherein, via the distributor element (14), a fluidic connection can be established from an exhaust-gas inlet channel (13) to respectively one exhaust-gas outlet channel (16) of a plurality of exhaust-gas outlet channels (16) corresponding in number to the cylinders. Advantageously, apart from the distributor element (14), use can be made of a control element (22) which is movable via an actuator (47) and by which the clearing of the fluidic connection between the outlet opening (21) of the distributor element (14) and the exhaust-gas outlet channels (16) of the exhaust gas recirculation device (9) can be shifted in comparison to the phase angle of the camshaft (11).

Abstract: To overcome problems concerning the sticking of the check plate in a combined check and control valve, a stop is provided on the valve rod or a guide element in the vicinity of the valve rod, whose distance to the limiting element is smaller than the maximum stroke and larger than the nominal stroke of the limiting element. Thus, it is achieved that the check plate is released from the valve seat by means of the stop, when the valve rod is displaced to the maximum.

Abstract: The invention relates to a sintered metal rotor of a rotary piston pump, comprising a pot-shaped base (1) and a journal element centrally projecting from the bottom of said base (1). Said journal element comprises a base section and an adjoining connecting claw section (2) for a coupling element to be joined thereto. The rotor is characterized in that the connecting claw section (2) is configured in the form of two prominent single webs (3). Said single webs (3) are located at a diametrical distance to each other in the periphery of the cylindrical base section in one area each that is limited, in terms of its periphery, to not more than 100°. and radially to not more than 25% of the diameter of the cylindrical base section. The two connecting claw single webs (3) are pressure-sintered by means of single pressure rams that are designed for the cross-sectional areas thereof and that are actuated separately from the sinter pressure rams required to produce the rotor.

Abstract: Air control valve apparatus (1) for internal combustion engines (2) having a turbocharger (3), wherein the air control valve apparatus (1) is arranged in a bypass channel (4) between the pressure side (5) and the suction side (6) of a boost pressure pump of the turbocharger, having a housing (7) which has an electromagnetic drive unit (8) having a coil (9), a yoke (10) and a core element (11), and a valve unit (12) which can be moved in the housing (7), wherein means (13) are provided which hold the movable valve unit (12) in the closed position in the currentless state, and wherein at least one pressure equalization opening (14) is provided on the movable valve unit (12), wherein the at least one pressure equalization opening (14) can be closed by at least one switching element (15).

Abstract: The invention relates to a controllable two-way valve (1), in which a valve rod (3) is connected in a permanent manner to at least two valve members (4, 5, 6, 24, 25; 39, 40), the valve rod (3) being actuated by means of an actuator (2). The housing (7) comprises an inlet (8; 4) or outlet and two corresponding outlets (9; 32; 42), (10; 28; 43) or inlets. According to the invention, the two valve members (4, 5, 6; 24, 25; 39, 40) correspond with at least two valve seats (12, 17, 22; 29, 37, 38; 46, 47) and the two or more valve members (4, 5, 6; 24, 25; 39, 40) have three control surfaces (11, 13, 18; 26, 27, 31; 44, 45, 48). The invention thus provides a dirt-resistant valve, which is easy to operate, has fixed valve members and does not require additional equipment. Said valve permits both the inlet to be completely blocked and the two outlets to be controlled independently of one another.

Abstract: The invention relates to a throttle plate port whose pivot axis is disposed so as to be axially offset with respect to the throttle plate and whose radial peripheral surface is shaped, at least by sections, in the form of spherical sectors, where in the position which closes the bore the peripheral surface of the throttle plate abuts, in the form of a line, the seat face of the housing. Through this type of eccentric disposition and simultaneous realization of the peripheral surface, the housing can be realized without undercuts and nonetheless precise dosing can be achieved in the case of small pivot angles.

Abstract: An exhaust gas return system for an internal-combustion machine which comprises a low-pressure supply line extending from an inlet From the compressor. a high-pressure supply line extends to the internal-combustion machine. From the internal-combustion machine a high-pressure exhaust gas line extends to a turbine. From the turbine a low-pressure exhaust gas line extends to an outlet. The low-pressure exhaust gas line and the low-pressure supply line have connected therewith a low-pressure return line for returning exhaust gas. The high-pressure exhaust gas line has connected therewith a bypass line for utilizing the heat of the exhaust gas produced in the internal-combustion machine for heating the exhaust gas to be returned of the low-pressure return line before the exhaust gas is supplied to the turbine (24), if desired. Thus the cold start phase of the internal-combustion machine can be reduced.

Abstract: The invention relates to a throttle valve adjusting device (1) which comprises a throttle valve housing (2) linked with a drive unit (6). According to the invention, the electric motor (7) of said drive unit (6) is disposed both outside the housing (9) of the drive unit (6) and outside the throttle valve housing (2) so that its pole tube (16) lies substantially exposed and at the same time serves as the motor casing. Said pole tube (16) has a closed (18) and an open end (17) which is closed by a contact plate (10), while the closed end (18) comprises a bearing element (19) for the drive shaft (14) of the electric motor (7). The inventive throttle valve housing is improved in terms of construction space required and materials used, thereby considerably reducing the costs for production and assembly as well as reducing its weight.