Abstract: The invention relates to a method for determining an amplitude A of a pump-induced fluid pressure fluctuation of a fluid which is regulated to a desired fluid pressure psoll by means of a pump. In this case, the method comprises providing (S1) a pressure signal of the fluid, determining (S2) the amplitude A of the fluid pressure fluctuation on the basis of the pressure signal which has been provided, checking (S3) whether the pressure signal which has been provided satisfies a predetermined plausibility criterion, and outputting or rejecting (S4) the determined amplitude A on the basis of whether the pressure signal which has been provided satisfies the predetermined plausibility criterion.

Abstract: The present disclosure relates to a device and a method for monitoring an SCR exhaust gas after-treatment device. The method involves monitoring of a ratio between reducing agent quantity and nitrogen oxide conversion, especially a ratio between ammonia quantity and nitrogen oxide conversion, of the SCR exhaust gas after-treatment device. The nitrogen oxide conversion is detected or determined with a cross sensitivity to ammonia. The method furthermore involves determining of an ammonia slip condition based on the monitored ratio between reducing agent quantity and nitrogen oxide conversion. The method may offer the benefit of being easily carried out and implemented in an easy manner.

Abstract: An air vent is described, having a housing with an air inlet section, a main air channel, and an air outlet section, the main air channel having at least two opposing sections, which reduce the size of the main air channel starting from the air inlet section and starting from the air outlet section. At least two air channels, which lead into the main air channel via outlet openings, are arranged behind the sections. A pivotably mounted flap, which closes the air channel when in a non-actuated position, is located in the region of inlet openings in each of the air channels. In addition, at least one control element on a control member and a drive unit are provided, wherein the flaps can be pivoted via the at least one control element by means of pivot levers. The Coanda effect is used to deflect the air.

Abstract: A air vent with a housing has at least one opening for supplying an airflow and an opening for discharging the supplied airflow. The airflow can be supplied to the air vent from an air supply shaft or from an air supply line in a heating, ventilating, or air-conditioning systems for a motor vehicle. The housing of the air vent is adapted to be inserted into a wall opening or can be assembled behind such a wall opening and secured there via one of the at least two parts of the housing. In the non-use state of the air vent, one part of the housing lies in or over the other part of the housing.

Abstract: The present disclosure relates to a device and a method for monitoring an SCR exhaust gas after-treatment device. The method involves monitoring of a ratio between reducing agent quantity and nitrogen oxide conversion, especially a ratio between ammonia quantity and nitrogen oxide conversion, of the SCR exhaust gas after-treatment device. The nitrogen oxide conversion is detected or determined with a cross sensitivity to ammonia. The method furthermore involves determining of an ammonia slip condition based on the monitored ratio between reducing agent quantity and nitrogen oxide conversion. The method may offer the benefit of being easily carried out and implemented in an easy manner.

Abstract: The present disclosure relates to a door having a door leaf with a plurality of door leaf sections which are connected in an articulated manner to one another by means of hinges, wherein a hinge has two hinge articulations of adjacent door leaf sections, at least one relatively long drive means which is connected to at least one door leaf section, and at least one guide means which is suitable for guiding the door leaf during its movement. In order to optimize the door in terms of its overall space, in particular in terms of width and depth and in so doing ensure a simple and cost-effective, but at the same time nevertheless reliable operation of the door, it is proposed to arrange the elongate drive means such that it is accommodated at least in certain portions in the door leaf section.

Abstract: An air vent is described, having a housing with an air inlet section, a main air channel, and an air outlet section, the main air channel having at least two opposing sections, which reduce the size of the main air channel starting from the air inlet section and starting from the air outlet section. At least two air channels, which lead into the main air channel via outlet openings, are arranged behind the sections. A pivotably mounted flap, which closes the air channel when in a non-actuated position, is located in the region of inlet openings in each of the air channels. In addition, at least one control element on a control member and a drive unit are provided, wherein the flaps can be pivoted via the at least one control element by means of pivot levers. The Coanda effect is used to deflect the air.

Abstract: A air vent with a housing has at least one opening for supplying an airflow and an opening for discharging the supplied airflow. The airflow can be supplied to the air vent from an air supply shaft or from an air supply line in a heating, ventilating, or air-conditioning systems for a motor vehicle. The housing of the air vent is adapted to be inserted into a wall opening or can be assembled behind such a wall opening and secured there via one of the at least two parts of the housing. In the non-use state of the air vent, one part of the housing lies in or over the other part of the housing.

Abstract: An air vent is described, having a housing with an air discharge opening, a first connection to an air supply channel and a continuous flow channel. The flow channel is curved at least at two opposite sections such that the cross-section of the flow channel increases toward the air discharge opening, and the at least two sections (26; 28) have openings (30, 32, 34), each of which opens into a chamber located behind the sections. Each chamber has a second connection, separate from the first connection, for supplying or removing air so as to generate an overpressure and/or vacuum.