Abstract: A water-conveying module for injecting water into a combustion chamber of an internal combustion engine, having a conveying unit, which has a pump for conveying the water from a tank. The water can be conveyed by the pump to an injection point along a dosing line. The conveying unit has a water outlet through which water is conveyed out of the conveying unit. The water outlet is formed by a connection plug onto which the dosing line can be plugged, Water can be conveyed from the conveying unit into the dosing line along the connection plug that has a section which can be flowed through by the water and which is part of the fluid line from the conveying unit to the dosing line.

Abstract: A fluid-conveying device for conveying a fluid, such as in particular water, from a tank. The fluid can be conveyed along a dosing line to an injection point by a pump, wherein the dosing line is attached at a pressure side of the pump by a connection plug which is attached to an outlet line. The fluid-conveying device has at least one first valve, which is preloaded by a spring and which is configured to prevent a fluid flow from the dosing line to the outlet line and which is furthermore configured to permit the fluid flow from the outlet line to the dosing line if a predefined minimum pressure p1 is reached on that side of the first valve which faces toward the outlet opening.

Abstract: A water-conveying module for injecting water into a combustion chamber of an internal combustion engine, having a conveying unit, which has a pump for conveying the water from a tank. The water can be conveyed by the pump to an injection point along a dosing line. The conveying unit has a water outlet through which water is conveyed out of the conveying unit. The water outlet is formed by a connection plug onto which the dosing line can be plugged, Water can be conveyed from the conveying unit into the dosing line along the connection plug that has a section which can be flowed through by the water and which is part of the fluid line from the conveying unit to the dosing line.

Abstract: A heating device for installation in a vehicle tank for reducing agent, which is introduced into an exhaust tract of a motor vehicle for exhaust gas aftertreatment. The heating device includes at least one electrical heating element and a heat distribution body, wherein the at least one electrical heating element includes a PTC heating element, and wherein the PTC heating element is arranged in thermally conductive contact with the heat distribution body. According to the invention, the heat distribution body has a heat conduction device which is designed to distribute heat from the PTC heating element in a targeted manner within the heat distribution body. The invention also specifies a vehicle tank with such a heating device.

Abstract: A method for operating a device for dosed supply of a liquid, having a pump to deliver the liquid. The pump has an inlet and an outlet. An eccentric is arranged on the pump housing and a deformable diaphragm is arranged between a pump housing and the eccentric. The deformable diaphragm and the pump housing delimit a delivery path from the inlet to the outlet. The seal can be displaced along the delivery path by movement of the eccentric. A pressure sensor is connected to the outlet of the pump. A liquid is delivered by the pump. A time curve of the pressure at the outlet of the pump is monitored during delivery by the at least one pressure sensor. An angle position of the eccentric of the pump is detected using at least one characteristic feature of the time curve at the outlet.

Abstract: A method for operating a device for providing a liquid additive includes feeding the liquid additive along a feeding path having at least one first portion which forms a heat conducting section from a heater of the device into a tank for the liquid additive. The feeding path also has at least one second portion in which a component susceptible to freezing is disposed. The liquid additive is first fed along the feeding path of the device. Subsequently, the feeding of liquid additive is stopped. Then, partial draining of the feeding path takes place, with liquid additive remaining in the at least one first portion of the feeding path while the at least one second portion is being drained. A device for providing a liquid additive is also provided.

Abstract: A device for injecting water into an internal combustion having a tank for storage and provision of water, an injector for injecting the water into the internal combustion engine, which injector is connected to the tank, a control unit for controlling the injector 6, and a decontamination unit which has at least one element with a contact surface which, with formation of a surface contact with the water, acts in a decontaminating manner to provide decontaminated water for injection.

Abstract: The invention relates to a method for checking the function of at least one PTC heating element which is used in a device for providing a liquid additive. The at least one PTC heating element is connected to a voltage source via electric conductors. According to the method, a starting current with a first value is provided at a specified operating voltage in a step a). Then, in a step b), a monitoring process is carried out in order to determine whether the starting current with the first value is provided for a minimum duration, said minimum duration having a value of at least seconds. The method is used in particular for on-board diagnoses of a device for providing a liquid additive.

Abstract: A delivery device for delivering a reducing agent from a reducing agent tank to an exhaust gas treatment device of an internal combustion engine, includes a partially rigid reducing agent line and a delivery pump disposed in the reducing agent line and having a delivery direction from the reducing agent tank to the exhaust gas treatment device. The delivery device has at least one vibration compensating device selected from the following group: an inflow compensating device upstream of the delivery pump in the delivery direction, an outflow compensating device downstream of the delivery pump in the delivery direction, a pump-internal compensating device within the delivery pump, and a structure borne noise compensating device on a fixing of the delivery pump. A motor vehicle having the delivery device is also provided.

Abstract: A pump for conveying a fluid includes a pump housing, an eccentric, a deformable element arranged in a pump gap between the inner circumferential surface of the pump housing, and an outer surface of the eccentric, such that a conveying channel is formed from an inlet to an outlet. A stationary seal is provided between the outlet and the inlet and prevents a backflow of the fluid from the outlet back to the inlet. The inner circumferential surface of the pump housing has a recess in the region of the stationary seal, and the deformable element is tensioned fluid-tight at the inner circumference surface in the region of the recess using a pin.

Abstract: A method for extracting a liquid additive from an interior space of a tank at an extraction point includes: filtering the liquid additive by at least one filter that covers the extraction point and that is configured to separate the extraction point from the interior space of the tank and through which the liquid additive flows, wherein contaminants of the liquid additive are deposited on a surface of the filter, and extracting the liquid additive from the tank at the extraction point; forming at least one porous filter cake from contaminants of the liquid additive on the surface of the filter; and filtering the liquid additive by the at least one porous filter cake, wherein contaminants of the liquid additive are deposited in the filter cake, and extracting the liquid additive from the tank at the extraction point.

Abstract: A pump for pumping a liquid has a pump housing with at least one inlet and at least one outlet. The pump housing has an eccentric rotatable relative to the pump housing by an axle. A deformable element is arranged between the pump housing and the eccentric, and by the deformable element, at least one pump path from the at least one inlet to the at least one outlet is delimited and at least one movable pump path seal is formed, which separates at least one closed pump volume in the pump path. The at least one movable seal is movable in a pump direction from the inlet to the outlet by a movement of the eccentric to pump the fluid along the pump path. The pump has at least one adjustable axial calibrating device, by which the deformable element is clamped in the axial direction parallel to the axle.

Abstract: A pump includes a pump housing, an inlet, an outlet, a rotatable eccentric, a deformable element between housing and eccentric and a delivery channel from inlet to outlet formed by the deformable element and the housing. The deformable element is pressed against the housing in sections by the eccentric forming a movable seal of the channel and a closed volume in the channel being movable along the channel from inlet to outlet to pump the liquid by rotating the eccentric. A method for operating the pump includes a) setting a liquid quantity to be pumped, b) determining a temperature of the deformable element, c) determining a parameter considering the temperature from step b), the parameter representing a dependence between movement of the eccentric and pump capacity and d) pumping the liquid quantity set in step a) by adapting an operating mode of the pump considering the parameter from step c).

Abstract: A pump for conveying liquid includes a pump housing with an inlet and an outlet. An eccentric mounted at the housing rotates about an axis relative to the housing. A deformable element is disposed between the housing and the eccentric. A delivery duct from the inlet to the outlet is formed by the deformable element and a circumferential housing surface. The deformable element is pressed in sections against the housing by the eccentric to form a displaceable seal of the delivery duct and a closed pump volume in the delivery duct, which can be displaced along the delivery duct from the inlet to the outlet by a movement of the eccentric to convey liquid. A channel cross-section of the delivery duct is limited by the circumferential surface, a set-back duct surface of the deformable element and a contact seal between the circumferential surface and the deformable element.

Abstract: A pump for conveying liquid includes a pump housing having an inlet, an outlet, an inner circumferential surface and a geometric axis. An eccentric in the housing is rotatable about the geometric axis relative to the housing. A deformable element is disposed between the inner circumferential housing surface and the eccentric. A delivery duct from the inlet to the outlet is formed by the deformable element and the inner circumferential housing surface. The deformable element is pressed against the housing by the eccentric in sections so that a displaceable seal of the duct and a closed pump volume in the duct are formed and are displaceable to convey the liquid along the duct from the inlet to the outlet by rotation of the eccentric. A receptacle, accommodating an edge region of the deformable element, is formed by the inner circumferential housing surface and a counter bracket.

Abstract: A module for the metered provision of a liquid includes a chamber having a chamber wall enclosing, at least partially, a chamber space of the chamber. The chamber is surrounded at least partially by a hood. At least one cavity is arranged between the hood and the separated chamber and the hood is heatable.

Abstract: A device for supplying a liquid additive includes at least one tank and an extraction unit for delivering the liquid additive out of the tank to an additive consumer. The tank has a tank wall and the extraction unit is mounted on a mounting section of the tank wall. The tank wall is made of an injection molding compound and integrated stiffening structures are provided in the injection molding compound in the region of the mounting section. A method for producing the device and a motor vehicle having the device are also provided.

Abstract: A method for operating a device for providing a liquid additive includes feeding the liquid additive along a feeding path. The feeding path has at least one first portion in which a peristaltic pump is disposed. The pump, in particular, has a reversible feeding direction and can be damaged by deposits discharged from the liquid additive. The feeding path also has at least one second portion in which a component susceptible to freezing is disposed. At first liquid additive is fed along the feeding path of the device. Subsequently, the feeding of the liquid additive is stopped. The feeding path is then partially emptied in such a way that liquid additive remains in the at least one first portion of the feeding path while the at least one second portion is emptied. A device for providing a liquid additive is also provided.

Abstract: A pump for delivering a fluid includes: a pump housing having an inlet and an outlet, and having an inner circumferential face; a drive shaft; an eccentric inside the pump housing, the eccentric being eccentrically movable relative to the pump housing; a deformable element arranged in a pump gap between the inner circumferential face and an outer surface of the eccentric, the deformable element and the inner circumferential face defining a delivery channel. The deformable element is forced against the pump housing by the outer surface of the eccentric along at least a portion of the delivery channel such to form a sliding sealing of the delivery channel that can be slid along the delivery channel from the inlet to the outlet to deliver fluid by movement of the eccentric. A reinforcing ring has a coefficient of thermal expansion smaller than a coefficient of thermal expansion of the pump housing.

Abstract: A method for manufacturing a tank for a motor vehicle for storing a liquid additive with a calibrated sensor for determining at least one parameter of the liquid additive in the tank. In a step a) the sensor is installed in the tank. In a step b) the tank is at least partially filled with a predefined quantity of a test liquid. In a step c) a signal of the sensor is determined, and in a step d) the sensor is calibrated with the signal.