Fluid conducting system

Patent metadata

Field	Value
Publication number	US-10662907-B2
Application number	US-201715476046-A
Country	US
Kind code	B2
Filing date	Mar 31, 2017
Priority date	Oct 2, 2014
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

A fluid conducting system for transport of a fluid has a housing with an inlet for the fluid and an outlet for the fluid. A sensor is arranged in the housing or protrudes from an exterior into the housing and measures a mass flow or a volume flow of a fluid flow that is flowing through the housing from the inlet to the outlet. A filter element is arranged upstream of the sensor in the housing. A fluid channel section has an inlet cross section and an outlet cross section, wherein the fluid channel section is arranged upstream of and in front of the sensor and the outlet cross section adjoins the sensor. The fluid channel section has a tapering cross section tapering from the inlet cross section toward the sensor and accelerating at least a portion of the fluid flow and conducting the fluid flow to the sensor. The tapering cross section of the fluid channel section tapers constantly at least in an area of the outlet cross section in front of the sensor.

First claim

What is claimed is:

1. A fluid conducting system for transport of a fluid, the fluid conducting system comprising:
a filter housing having:
a housing outer wall;
an inlet port receiving fluid to be filtered; and
an outlet port through which filtered fluid exits from housing;

a filter element for filtering the fluid arranged in an interior of the filter housing;
the filter housing further comprising:
a tubular outlet pipe extending from a first end at an exterior of the filter housing, through the housing outer wall of the filter housing and projecting inwardly from an interior side of the housing outer wall to extend along an inner surface of the housing outer wall to a radially outwardly flared end, positioned between the filter element and the inner surface of the housing outer wall;
wherein the radially outwardly flared end forms a first inflow tulip for receiving filtered fluid from the filter element; and
wherein the tubular outlet pipe at the interior of the filter housing has a sensor insertion opening for receiving a flow sensor into a flow sensor receiving chamber provided in an interior of the tubular outlet pipe in the interior of the filter housing, the flow sensor extending from the exterior of the filter housing, through the housing outer wall and into the flow sensor receiving chamber;

a conically tapering sensor flow acceleration pipe having a circumferentially closed conical wall, arranged coaxially in the interior of the tubular outlet pipe and extending outwardly beyond the outwardly flared second end of the tubular outlet pipe to form a second radially outwardly flared end, forming a second inflow tulip, the second inflow tulip positioned between the filter element and the inner surface of the housing outer wall;
wherein the conically tapering sensor flow acceleration pipe has:
an outlet opening positioned at the flow sensor receiving chamber within the tubular outlet pipe and facing a flow sensing surface of the flow sensor;
an inlet opening formed by the second inflow tulip;

wherein the conically tapering sensor flow acceleration pipe is completely circumferentially closed from the outlet opening to the inlet opening;

wherein the conically tapering sensor flow acceleration pipe has an interior diameter that tapers continuously, the interior cross section reducing to accelerate fluid flow velocity at the flow sensing surface of the flow sensor.

2. The fluid conducting system according to claim 1 , wherein
an annular flow gap is formed by spacing between an outer wall of the conically tapering sensor flow acceleration pipe and the tubular outlet pipe;
wherein the annular flow gap conducts a first portion of filter fluid flow around an exterior of the conically tapering sensor flow acceleration pipe;
wherein an interior of the conically tapering sensor flow acceleration pipe conducts a different second portion of the filter fluid flow in the tubular outlet pipe.

3. The fluid conducting system according to claim 2 , further comprising:
the flow sensor inserted into the flow sensor receiving camber through the sensor insertion opening, the flow sensor extending through the housing outer wall so the flow sensor is exchangeable from the exterior of the housing.

4. The fluid conducting system according to claim 1 , wherein
the second radially outwardly flared end of the conically tapering sensor flow acceleration pipe covers an end of the tubular outlet pipe such that the conically tapering sensor flow acceleration pipe captures all fluid flow in the tubular outlet pipe.

5. The fluid conducting system according to claim 1 , wherein
a cross section of an inner wall of the conically tapering sensor flow acceleration pipe is designed with an aerodynamic profile that increases the flow rate.

Assignees

• Mann & Hummel Gmbh

Inventors

• Dirnberger Timo
• Frank Michael

Classifications

• G01F1/6842

  with means for influencing the fluid flow · CPC title

• F02M35/0207

  on the clean air side · CPC title

• G01F5/00

  Measuring a proportion of the volume flow · CPC title

• F02M35/10262 Primary

  Flow guides, obstructions, deflectors or the like (for generating a charge motion in the cylinder F02B31/00; for re-atomising condensed fuel or homogenising fuel-air mixture F02M29/00) · CPC title

• F02M35/021

  Arrangements of air flow meters in or on air cleaner housings · CPC title