Abstract: A toothed wheel (16) is provided with teeth, in which a cross section of a respective first section (24) of the tooth (23) has an outer contour that projects in at least one partial area of the outer contour relative to an outer contour of the adjoining second section (26) of the tooth (23), and is elastically designed and/or mounted, as well as a pump unit, in particular as a metering pump unit, with a drive having a toothed gearing with the toothed wheel.

Abstract: A toothed wheel (16) is provided with teeth, in which a cross section of a respective first section (24) of the tooth (23) has an outer contour that projects in at least one partial area of the outer contour relative to an outer contour of the adjoining second section (26) of the tooth (23), and is elastically designed and/or mounted, as well as a pump unit, in particular as a metering pump unit, with a drive having a toothed gearing with the toothed wheel.

Abstract: In a method for measuring the injection quantity of injection systems, in particular for motor vehicles and in particular in production testing, an injection system injects a testing fluid into a measuring chamber. A detection device detects a movement of a piston, which at least partially defines the measuring chamber. This detection device generates a corresponding measurement signal. In order to increase the precision of the calculation of the injected testing fluid mass, the invention proposes that the pressure of the testing fluid in the measuring chamber be detected and that the measurement signal be processed taking into account the detected pressure.

Abstract: In a method for measuring the injection quantity of injection systems (32, 33), in particular for motor vehicles and in particular in production testing, an injection system (32, 33) injects a testing fluid into a measuring chamber (45). A detection device (68) detects a movement of a piston (40), which at least partially defines the measuring chamber (45). This detection device (68) generates a corresponding measurement signal (sm). In order to increase the precision of the calculation of the injected testing fluid mass, the invention proposes that the pressure (p) of the testing fluid in the measuring chamber (45) be detected and that the measurement signal (sm) be processed (80) taking into account the detected pressure (p).

Abstract: An apparatus (10) for measuring the injection quantity of injection systems (32), in particular for internal combustion engines in motor vehicles and especially in production testing, includes a measurement chamber (45). A connecting device (28) is also provided, by which at least one injection system (32) can be made to communicate with the measurement chamber (45) in pressuretight fashion. A piston (40) is passed through a wall of the measurement chamber (45). A detection device (58) is also provided, with which a motion of the piston (40) can be detected. To increase the measurement accuracy of the apparatus (10), it is proposed that the detection device (58) function in noncontacting fashion.

Abstract: A device (10) serves to measure the injection quantity of injection systems (16), in particular for motor vehicles, and in particular in production testing. The device (10) includes a measuring chamber (14), and a coupling device by which at least one injection system (16) can be coupled to the measuring chamber (14) in pressureproof fashion. The device (10) further includes a piston (26), which is held displaceably in a guide device (18) and regionally defines the measuring chamber (14). Finally, a sensor (50) is also provided, which upon an injection by the injection system (16) detects a displacement of the piston (26). To increase the measurement precision, it is proposed that the piston (26) be at least essentially closed and be hollow in its interior.