Motor vehicle pipeline with a mixing element made from a wire structure

Patent metadata

Field	Value
Publication number	US-11053895-B2
Application number	US-201815908450-A
Country	US
Kind code	B2
Filing date	Feb 28, 2018
Priority date	Mar 3, 2017
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

The present disclosure relates to a pipeline for supplying a gas to an internal combustion engine, with a pipeline cross section forming a passage for the gas and a gas mass measuring device for measuring a gas mass flow. The pipeline is characterized in particular in that it comprises a mixing element made from a wire structure upstream from the gas mass measuring device and in that the mixing element serves for the thorough mixing of the gas in order to homogenize an inhomogeneous flow profile which is present upstream from the mixing element.

First claim

We claim:

1. A pipeline for supplying a gas to an internal combustion engine, with a pipeline cross section forming a passage for the gas and a gas measuring device for measuring a gas mass flow, comprising:
a mixing element made from a wire structure and located upstream from the gas measuring device, wherein the mixing element serves for influencing and thorough mixing of the gas in order to homogenize an inhomogeneous flow profile which is present upstream from the mixing element, wherein the wire structure comprises a rolled-up band of wire mesh or a rolled-up band of wire weave to form the mixing element or a wire mesh tube is pressed flat into a band and the band is rolled up to form the mixing element further comprising an embossing applied to the band, wherein the embossing is oriented slanting or not perpendicular relative to a rolling plane of the band.

2. The pipeline according to claim 1 , wherein characterized in that the mixing element homogenizes the inhomogeneous flow profile such that it is transformed into a flow profile which is substantially homogeneous over the pipeline cross section.

3. The pipeline according to claim 1 , wherein the embossing is formed as an embossed corrugation or forms a slanting, a V, or a W pattern.

4. The pipeline according to claim 1 , wherein the mixing element has a uniform thickness or a homogeneous structure.

5. The pipeline according to claim 1 , wherein the band is rolled up in reversed lay, such that at least two layers of the band arranged one on top of the other are rolled up together.

6. The pipeline according to claim 1 , wherein the band in the rolled-up state forms individual layers and the individual layers have embossings which are oriented differently or oppositely.

7. The pipeline according to claim 1 , wherein in the rolled-up state of the band,
two open ends of the band are arranged on outer sides of the band and staggered by 180° +/−40°, +/−30° or +/−20° from each other, or
two open ends of the band are arranged centrally inside the band.

8. The pipeline according to claim 1 , wherein the mixing element fills up the entire pipeline cross section.

9. The pipeline according to claim 1 , wherein the mixing element acts as a swirling device, so that swirling of the gas at wire sections of the wire structure ensures the thorough mixing of the gas and the homogenization of the inhomogeneous flow profile.

10. The pipeline according to claim 1 , wherein a gas flow at an outlet of the mixing elements has a plurality of swirls or a gas flow at the outlet of the mixing element is more heavily swirled than at an inlet of the mixing element and in that a linear calming section or at least one straightening device for reducing the swirls is formed downstream from the mixing element in order to dampen the swirls created by the mixing element.

11. The pipeline according to claim 1 , wherein a straightening device for reducing of swirls is arranged in or directly in front of a gas inlet of the gas measuring device.

12. The pipeline according to claim 1 , wherein,
wire sections of a wire mesh are arranged in random orientation or intersecting behind one another, so that the gas is deflected several times during its flow through the mixing element, or
wire sections of at least two wire weave layers are arranged intersecting behind one another, so that the gas is deflected several times during its flow through the mixing element.

13. The pipeline according to claim 1 , wherein upstream from the mixing element
includes a perturbing element and the perturbing element results in the gas having an inhomogeneous flow profile across the pipeline cross section upstream from the mixing element or
the pipeline is curved so that the gas has an inhomogeneous flow profile across the pipeline cross section upstream from the mixing element.

14. The pipeline according to claim 1 , wherein the mixing element, a calming section or at least one straightening device is arranged in the pipeline upstream from the gas measuring device.

15. The pipeline according to claim 1 , wherein the wire structure is formed from a metal or plastic material, or the wire mesh is knitted from a single wire at least in sections.

16. The pipeline according to claim 1 , wherein the mixing element is located upstream from an intake of the gas measuring device.

17. A motor vehicle, preferably a utility vehicle, comprising
a pipeline for supplying a gas to an internal combustion engine, with a pipeline cross section forming a passage for the gas;
a gas measuring device for measuring a gas mass flow; and
a mixing element made from a wire structure and located upstream from the gas measuring device, wherein the mixing element serves for influencing and thorough mixing of the gas in order to homogenize an inhomogeneous flow profile which is present upstream from the mixing element, wherein the wire structure comprises a rolled-up band of wire mesh or a rolled-up band of wire weave to form the mixing element or a wire mesh tube is pressed flat into a band and the band is rolled up to form the mixing element.

Assignees

• Man Truck & Bus Ag

Inventors

• Heindl Thomas
• Tuxhorn Frank

Classifications

• F15D1/025

  by means of orifice or throttle elements · CPC title

• G01F15/00

  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 title

• F02D41/18 Primary

  by measuring intake air flow · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F02M35/10295

  Damping means, e.g. tranquillising chamber to dampen air oscillations (intake silencers F02M35/12) · CPC title