Patent ID: 8950272
Filing Date: 2015-02-10
Classification: G01F

Abstract:
1. An air mass flowmeter comprising: a tube; a sensor module fitted in the tube that measures a gas quantity flowing in a main direction of flow in the tube at a flow speed, the sensor module extending in the main direction of flow in the tube; a first end of the sensor module defines a first plane normal to the main direction of flow; a second end of the sensor module defines a second plane normal to the main direction of flow; a flow channel in the sensor module that receives a portion of the gas quantity flowing in the tube and directs the portion of the gas quantity via measuring elements; extended flow directing elements arranged in the tube that are oriented parallel to the main direction of flow, wherein the gas quantity flows against end faces of the extended flow directing elements and flows past wall regions of the extended flow directing elements, wherein the extended flow directing elements include: wherein the wall regions of the extended flow directing elements extend at least partially between the first and second planes, whereby, given a low flow speed in the tube, the extended flow directing elements increase the flow speed of the gas quantity in a region of the sensor module, relative to the flow speed in the tube, and, given a high flow speed of the gas quantity in the tube, increase the flow speed of the gas quantity to a lesser extent in the region of the sensor module, relative to the flow speed.