Sensor device for detecting at least one flow property of a fluid medium

• US 8,978,455 B2
• Filed: 12/18/2013
• Issued: 03/17/2015
• Est. Priority Date: 12/20/2012
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Mais, Torsten, Kaufmann, Andreas, Wagner, Ulrich
• Primary Examiner(s): Kirkland, III, Freddie
• Application Number:
  US14/133,259
• Publication Number:
  US 20140174166A1
• Time in Patent Office: 454 Days
• Field of Search: 731/143.2, 732/025, 732/041.1, 732/042.1, 732/042.2
• US Class Current: 73/114.32
• CPC Class Codes: F02D 41/18 by measuring intake air flow
• CPC Class Codes: F02D 41/187 using a hot wire flow sensor
• CPC Class Codes: G01F 1/684 Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
• CPC Class Codes: G01F 1/6842 with means for influencing the fluid flow
• CPC Class Codes: G01F 1/6845 Micromachined devices

Abstract

A sensor device for detecting a flow property of fluid medium, e.g., an air flow in the intake tract or the charge air tract of an internal combustion engine, includes: a sensor housing introduced into the air flow and having at least one housing body, at least one cover, and at least one channel through which the fluid medium flows; a sensor element for detecting the flow property, the sensor element being held on a top side of a carrier. The carrier is situated at least partially in the channel and has a cross section which becomes wider in parallel with the main flow direction of the fluid medium at the location of the sensor element in a sectional plane in parallel to the main flow direction of the fluid medium in the channel.

Claims

1. A sensor device for detecting at least one flow property of an air flow in one of an intake tract or a charge air tract of an internal combustion engine, comprising:

at least one sensor housing introduced into the air flow, the sensor housing having at least one housing body, at least one cover, and at least one channel through which the air flows;

a sensor element for detecting the at least one flow property, the sensor element being held on a top side of a carrier, the carrier being situated at least partially in the at least one channel, wherein the carrier has a cross section which becomes wider in parallel with a main flow direction of the air flow at the location of the sensor element in a sectional plane in parallel to the main flow direction of the air flow in the channel.

2. The sensor device as recited in claim 1, wherein the carrier has a wedge shape in at least some sections at the location of the sensor element.

3. The sensor device as recited in claim 2, wherein the carrier has an apex angle as viewed in the main flow direction of the air flow.

4. The sensor device as recited in claim 2, wherein the carrier has a contoured inflow edge.

5. The sensor device as recited in claim 2, wherein the carrier has a recess on the top side, the sensor element being introduced into the recess in such a way that the air flows over a measuring surface of the sensor element.

6. The sensor device as recited in claim 2, wherein at least one of a bottom side and the top side of the carrier has a planar shape in at least some sections.

7. The sensor device as recited in claim 2, wherein at least one of a bottom side and the top side of the carrier has at least one of a concave shape and a convex shape in at least some sections.

8. The sensor device as recited in claim 2, wherein two areas having different shapes abut on at least one of a bottom side and the top side of the carrier to form a transitional edge.

9. The sensor device as recited in claim 8, wherein the carrier tapers on a downstream end.

10. The sensor device as recited in claim 2, wherein at least one of the housing body and the housing cover is configured with a geometry which induces a tapering of the channel in the area of the carrier.