Device for measuring flow rate of fluid such as aqueous urea solution, of fluid dose arrangement of combustion engine used in vehicle, has orifice and return valve that are provided in measuring conduit which is bridged with passage

摘要

The device (43) has a fluid conduit (39) through which the fluid flows. The orifice (15) and return valve (17) are provided in the measuring conduit (49) which is bridged with the passage (51). A switching valve (20) arranged in the passage, is provided between the pressure sensors (19,21). The fluid from the tank (3) is passed through the metering valve (23) through the fluid conduit. Independent claims are included for the following: (1) delivering module for delivering fluid; and (2) method for measuring flow rate of fluid.