SENSOR ARRANGEMENT FOR DETERMINING AT LEAST ONE PARAMETER OF A FLUID MEDIUM FLOWING THROUGH A CHANNEL STRUCTURE

• US 20180188087A1
• Filed: 07/22/2015
• Published: 07/05/2018
• Est. Priority Date: 09/16/2014
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Granted Patent: US 10,663,334 B2
• Time in Patent Office: Days
• 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
• CPC Class Codes: G01F 1/688 using a particular type of heating, cooling or sensing element G01F1/6847 takes precedence
• CPC Class Codes: G01F 15/00 Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
• CPC Class Codes: G01F 5/00 Measuring a proportion of the volume flow

Abstract

A sensor system is provided for determining at least one parameter of a fluid medium flowing through a channel structure, e.g., an air mass flow of an internal combustion engine. The sensor system has a sensor housing, e.g., a plug-in sensor that is introduced or can be introduced into a flow tube, in which the channel structure is formed, and at least one sensor chip, situated in the channel structure, for determining the parameter of the fluid medium. The sensor housing has an inlet into the channel structure, oriented opposite a main direction of flow of the fluid medium, and an outlet from the channel structure. The channel structure includes a main channel and a measurement channel. The measurement channel branches off from the main channel. The sensor chip is in the measurement channel. The main channel and the measurement channel discharge together into the outlet from the channel structure.

Claims

1-10. -10. (canceled)

11. A sensor system for determining at least one parameter of a fluid medium flowing through a channel structure, the sensor system comprising:

a sensor housing that is introduced or can be introduced into a flow tube, in which the channel structure is formed; and

at least one sensor chip situated in the channel structure for determining the parameter of the fluid medium;

wherein the sensor housing has an inlet into the channel structure that is oriented opposite a main direction of flow of the fluid medium, and an outlet from the channel structure, the channel structure including a main channel and a measurement channel, the measurement channel branching off from the main channel, the sensor chip being situated in the measurement channel, wherein the main channel and the measurement channel discharge together into the outlet from the channel structure.

12. The sensor system as recited in claim 11, wherein the fluid medium is an air intake mass flow of an internal combustion engine, and the sensor housing is a plug-in sensor housing.

13. The sensor system as recited in claim 11, wherein the outlet is situated in an end face of the sensor housing.

14. The sensor system as recited in claim 11, wherein a distance of a midpoint of the outlet from the inlet, in the main direction of flow, is from 11.0 mm to 15.0 mm.

15. The sensor as recited in claim 14, wherein the distance is from 12.0 mm to 14.0 mm.

16. The sensor system as recited in claim 11, wherein a midline of the outlet is inclined at an angle of from 30°

to 50°

downstream relative to the main direction of flow.

17. The sensor system as recited in claim 11, wherein the outlet has a width of from 3.0 mm to 8.0 mm.

18. The sensor system as recited in claim 11, wherein the main channel has at least one first main channel segment, in which the measurement channel branches off, and a second main channel segment, the second main channel segment adjoining a unifying segment of the channel structure, in which the measurement channel and the main channel are brought together, the second main channel segment being situated at an angle of from 10°

to 135°

to the first main channel segment.

19. The sensor system as recited in claim 18, wherein a width of the second main channel segment is being smaller than a width of the measurement channel.

20. The sensor system as recited in claim 18, wherein the main channel has at least one curved main channel segment that connects the first main channel segment and the second main channel segment, a maximum distance of the curved main channel segment to the inlet in the main direction of flow being from 10.0 mm to 20.0 mm.

21. The sensor system as recited in claim 11, wherein a width of the second main channel segment is smaller than a width of the first main channel segment.

22. The sensor system as recited in claim 20, wherein the main channel tapers in the curved main channel segment.