# US 2016/0355071 A1 · Air extraction system and method for a motor vehicle

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- Number: US 2016/0355071 A1
- Document ID: US20160355071A1
- Status: Published application
- Kind: A1
- Application number: 14/730,812
- Filed: 2015-06-04
- Published: 2016-12-08
- Earliest claimed: 2015-06-04
- Assignees: Ford Global Technologies, LLC
- Applicants: Ford Global Technologies, LLC
- Inventors: Eric R. Yerke; Martha Elizabeth Nefcy; Zhengyu Liu; James R. Hurd; Mitali Chakrabarti; Guadalupe Ramirez
- Web page: https://patentgrep.com/patent/US20160355071A1

## CPC

- B60H 1/248: {Air-extractors, air-evacuation from the vehicle interior}
- B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES

## Abstract

An air extraction system is provided for a motor vehicle. That air extraction system includes a trim air discharge outlet, an extractor and an extractor duct extending between the trim air discharge outlet and the extractor. The extractor duct is tuned to dissipate duct noise at at least one particular duct noise frequency characteristic of the extractor duct.

## Claims

### Claim 1

An air extraction system for a motor vehicle, comprising:
a trim air discharge outlet;
an extractor; and
an extractor duct extending between said trim air discharge outlet and said extractor, said extractor duct being tuned to dissipate duct noise at at least one particular duct noise frequency characteristic of said extractor duct.

### Claim 2 (depends on 1)

The air extraction system of claim 1, wherein said extractor duct includes a first expansion chamber sized and shaped to dissipate duct noise at a first duct noise frequency.

### Claim 3 (depends on 2)

The air extraction system of claim 2, wherein said extractor duct includes a second expansion chamber sized and shaped to dissipate duct noise at a second duct noise frequency.

### Claim 4 (depends on 3)

The air extraction system of claim 3, wherein said extractor duct includes a third expansion chamber sized and shaped to dissipate duct noise at a third duct noise frequency.

### Claim 5 (depends on 4)

The air extraction system of claim 4, wherein said third expansion chamber is downstream from said second expansion chamber and said second expansion chamber is downstream from said first expansion chamber.

### Claim 6 (depends on 5)

The air extraction system of claim 5, wherein said first expansion chamber has a length L1, said second expansion chamber has a length L2 and said third expansion chamber has a length L3 where L1≠L2≠L3.

### Claim 7 (depends on 6)

The air extraction system of claim 6, wherein L1>L2>L3.

### Claim 8 (depends on 6)

The air extraction system of claim 6, wherein L1>L3>L2.

### Claim 9 (depends on 6)

The air extraction system of claim 6, wherein L2>L1>L3.

### Claim 10 (depends on 6)

The air extraction system of claim 6, wherein L2>L3>Ll.

### Claim 11 (depends on 6)

The air extraction system of claim 6, wherein L3>L2>L1.

### Claim 12 (depends on 6)

The air extraction system of claim 6, wherein L3>L1>L2.

### Claim 13 (depends on 1)

The air extraction system of claim 1, wherein said trim air discharge outlet is provided in a package tray of the motor vehicle.

### Claim 14

A method of air extraction from a motor vehicle, comprising:
providing an extractor duct extending from a trim air discharge outlet to an extractor of the motor vehicle; and
tuning said extractor duct to dissipate duct noise at at least one particular duct noise frequency characteristic of said extractor duct.

### Claim 15 (depends on 14)

The method of claim 14, including providing a first expansion chamber in said extractor duct, said first expansion chamber being sized and shaped to dissipate duct noise at a first duct noise frequency.

### Claim 16 (depends on 15)

The method of claim 15, including providing a second expansion chamber in said extractor duct, said second expansion chamber being sized and shaped to dissipate duct noise at a second duct noise frequency.

### Claim 17 (depends on 16)

The method of claim 16, including providing a third expansion chamber in said extractor duct, said third expansion chamber being sized and shaped to dissipate duct noise at a third duct noise frequency.

### Claim 18 (depends on 17)

The method of claim 17, including providing said first expansion chamber with a length L1, said second expansion chamber with a length L2 and said third expansion chamber with a length L3 where L1≠L2≠L3.