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Sensor element for recording at least one property of fluid medium

一种传感器元件、流体介质的技术，应用在测量流体压力、测量流量/质量流量、通过测量压差检测流体流动等方向，能够解决空气质量错误显示、压力传感器错误显示等问题，达到避免特性曲线改变、避免错误显示的效果

Active Publication Date: 2018-10-23
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Despite the numerous advantages obtained with the aid of known measuring devices, the measurement of the flow properties of fluid media still remains a large number of technical challenges
Especially in the intake tract of internal combustion engines, the challenge is, for example, to protect the sensors used from water and dirt particles and thus to avoid false indications of the pressure sensor and the associated air quality.

Method used

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  • Sensor element for recording at least one property of fluid medium
  • Sensor element for recording at least one property of fluid medium
  • Sensor element for recording at least one property of fluid medium

Examples

Experimental program
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Embodiment Construction

[0030] exist Figure 1A and 1B An embodiment of a sensor element 110 according to the invention is shown in . here, Figure 1A shows a top view of the wall 112 of the housing 114 of the sensor element 110, and Figure 1B A sectional view of the housing 114 along the line A-A of FIG. 1 is shown.

[0031] In this exemplary embodiment, the sensor element is in the form of a plug-in probe 116 , which may, for example, be in the form of a pressure-based air mass meter (PFM). The sensor element 110 protrudes into the flow of the fluid medium and can (for example along Figure 1B One or more of the possible flow directions 118 shown in ) are flowed around by the fluid medium. Accordingly, wall 112 can be, for example, at least one side wall, at least one end wall, at least one rear wall or also at least one end side of plug-in detector 116 .

[0032] The sensor element 110 has at least one pressure cut-off 120 . If several pressure cut-offs 120 are provided, then for example a p...

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Abstract

The invention proposes a sensor element (110) for recording at least one property of a fluid medium. The sensor element (110) includes at least one housing (114) that forms at least one wall (112) ofat least one flow channel (132) that can be traversed by the flow of the fluid medium. In the wall (112), at least one pressure tap (120) branches off from the flow channel (132). At least one pressure sensor (125) for recording a pressure of the fluid medium is configured in the pressure tap (120). Provided in the wall (112) is at least one outflow contour (126) that at least partially surroundsan orifice (124) of the pressure tap (120) and is adapted for diverting impurities flowing along the wall (112) away from the orifice (124) of the pressure tap (120).

Description

technical field [0001] The invention relates to a sensor element for sensing at least one property of a fluid medium. Background technique [0002] Different types of sensor elements are known from the prior art for sensing at least one property of a fluid medium. Without being bound by other possible limitations, the invention is described below with reference to a pressure-based air mass meter. In principle, however, other configurations are also possible. [0003] It is thus generally known, for example, to determine the air mass in an air system, for example in the intake tract of an internal combustion engine, by means of various measuring principles. In addition to thermal measurement principles, for example in the form of hot-film air mass meters (HFM), pressure-based air mass measurements are also known which are based on at least one pressure measurement. Examples here include so-called Prandel probes or Venturi tubes. In order to determine the mass of air flowi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/38
CPCG01F1/383G01L19/0636G01L19/141G01M15/09G01L9/0041G01L19/147
Inventor B·普洛格曼
Owner ROBERT BOSCH GMBH