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Device for determining at least one parameter of a medium flowing in a line

A pipeline and medium technology, applied in the field of devices with at least one parameter, can solve problems such as distortion of output signals, and achieve the effects of reducing pressure loss, low cost, and avoiding undesired pulsation

Active Publication Date: 2008-07-23
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The output signal of the measuring cell is significantly distorted by pressure fluctuations in the measuring channel

Method used

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  • Device for determining at least one parameter of a medium flowing in a line
  • Device for determining at least one parameter of a medium flowing in a line
  • Device for determining at least one parameter of a medium flowing in a line

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Experimental program
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Embodiment Construction

[0018] figure 1 A pipe part 3 is shown which has an approximately cylindrical shell-shaped wall 15 surrounding a pipe channel 12 in which the medium flows in a main flow direction. The main flow direction is in figure 1 are represented by corresponding arrows 18 and extend from left to right in the figure. The main flow direction is defined as the direction in which the medium mainly flows through the pipe channel from the inlet of the pipe part 3 to its outlet, even though local vortex formation and locally existing flow separation regions have an adverse effect on A partial flow deviation from the main flow direction or a temporary change in direction. The main flow direction here runs parallel to the central axis 41 of the cylindrical shell-shaped wall 15 of the pipe part 3 . The duct part 3 can be accommodated, for example, in an intake duct of an internal combustion engine. The medium is, for example, the air flowing into the internal combustion engine.

[0019] A se...

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Abstract

Devices used to determine at least one parameter of a medium flowing in a line, especially for determining the air mass flow rate in the suction tract of an internal combustion engine, are known in prior art. Said devices comprise a line part (3) and a sensor device (1) provided with a bypass part. According to the invention, a flow guiding wall (4) extending in an essentially parallel manner in relation to the side wall (16) of the bypass part (6), and provided with a removal opening (33), is arranged in the line part (3) in the direction of main flow (18) behind the removal opening (33) in order to prevent the flow from separating on the side walls of the bypass part. Longitudinal expansion (b) of the flow guiding wall in the direction of the main flow (18) is equal or greater than the distance (a) of the removal opening (33) from the rear wall (14), and the distance thereof (c) from the central axis (41) of the line part (3) is greater than or equal to the distance (d) of the side walls (16), which are provided with removal openings, of the bypass part from the central axis.

Description

technical field [0001] The invention relates to a device for determining at least one parameter of a medium flowing in a pipeline. Background technique [0002] Such a device is known, for example, from DE 101 35 142 A1 and is used, for example, in the intake system of an internal combustion engine in order to determine the mass flow of air supplied to the internal combustion engine via a line. The section of a sensor device provided with the bypass element is inserted through an insertion opening into the line element. The bypass part has a channel structure with an inlet region, from which a measuring channel is branched off, provided with a measuring element. Furthermore, the inlet region has a separation region with at least one separation opening which opens into the line channel on at least one side wall of the bypass element. The separation region serves to separate liquid particles and / or solid particles from the channel structure, thereby preventing them from ente...

Claims

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Application Information

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IPC IPC(8): G01F1/68G01F15/02G01F1/684G01F5/00
CPCG01F5/00G01F1/6842
Inventor 乌韦·康策尔曼亨宁·马贝格克里斯托夫·格梅林
Owner ROBERT BOSCH GMBH
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