Flow Sensor and Method for Adjusting Fluid Flow Measurement
US-2024035867-A1 · Feb 1, 2024 · US
Air mass sensor
US9664545B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9664545-B2 |
| Application number | US-201314437744-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 24, 2013 |
| Priority date | Oct 23, 2012 |
| Publication date | May 30, 2017 |
| Grant date | May 30, 2017 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An air mass sensor includes a microelectromechanical-type sensor element having a heating element. A first temperature sensor element is arranged on the sensor element upstream of the heating element, and a second temperature sensor element is arranged on the sensor element downstream of the heating element. The first temperature sensor element has a first width and a first length, and the second temperature sensor element has a second width and a second length. To eliminate or closely limit false measurement results due to the presence of dirt on the sensor element, the first width of the first temperature sensor element is greater than the second width of the second temperature sensor element.
First claim
Opening claim text (preview).
The invention claimed is: 1. An air mass meter ( 2 ) comprising: a sensor element ( 15 ) of a microelectromechanical type, the sensor element ( 15 ) having: a heating element ( 12 ); a first temperature sensor element ( 7 ) arranged upstream, with respect to a direction of air mass flow, of the heating element ( 12 ); and a second temperature sensor element ( 8 ) arranged downstream, with respect to the direction of air mass flow, of the heating element ( 12 ), wherein the first temperature sensor element ( 7 ) has a first width (BT 1 ) and a first length (LT 1 ), and the second temperature sensor element ( 8 ) has a second width (BT 2 ) and a second length (LT 2 ), wherein the first width (BT 1 ) of the first temperature sensor element ( 7 ) is greater than the second width (BT 2 ) of the second temperature sensor element ( 8 ). 2. The air mass meter ( 2 ) as claimed in claim 1 , wherein the second length (LT 2 ) of the second temperature sensor element ( 8 ) is greater than the first length (LT 1 ) of the first temperature sensor element ( 7 ). 3. The air mass meter ( 2 ) as claimed in claim 1 , wherein the first width (BT 1 ) of the first temperature sensor element ( 7 ) is at least 10% greater than the second width (BT 2 ) of the second temperature sensor element ( 8 ). 4. The air mass meter ( 2 ) as claimed in claim 2 , wherein the second length (LT 2 ) of the second temperature sensor element ( 8 ) is at least 10% greater than the first length (LT 1 ) of the first temperature sensor element ( 7 ). 5. The air mass meter ( 2 ) as claimed in claim 1 , wherein the first width (BT 1 ) of the first temperature sensor element ( 7 ) is at least 30% greater than the second width (BT 2 ) of the second temperature sensor element ( 8 ). 6. The air mass meter ( 2 ) as claimed in claim 2 , wherein the second length (LT 2 ) of the second temperature sensor element ( 8 ) is at least 30% greater than the first length (LT 1 ) of the first temperature sensor element ( 7 ). 7. The air mass meter ( 2 ) as claimed in claim 1 , wherein the first width (BT 1 ) of the first temperature sensor element ( 7 ) is at least 50% greater than the second width (BT 2 ) of the second temperature sensor element ( 8 ). 8. The air mass meter ( 2 ) as claimed in claim 2 , wherein the second length (LT 2 ) of the second temperature sensor element ( 8 ) is at least 50% greater than the first length (LT 1 ) of the first temperature sensor element ( 7 ). 9. The air mass meter ( 2 ) as claimed in claim 1 , wherein a product of the first width (BT 1 ) and of the first length (LT 1 ) of the first temperature sensor element ( 7 ) is equal to a product of the second width (BT 2 ) and of the second length (LT 2 ) of the second temperature sensor element ( 8 ).
Assignees
Inventors
Classifications
- G01F1/6845Primary
Micromachined devices · CPC title
Thin-film arrangements · CPC title
by measuring intake air flow · CPC title
Thermoelectric elements, e.g. thermocouples, thermopiles · CPC title
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Frequently asked questions
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- What does patent US9664545B2 cover?
- An air mass sensor includes a microelectromechanical-type sensor element having a heating element. A first temperature sensor element is arranged on the sensor element upstream of the heating element, and a second temperature sensor element is arranged on the sensor element downstream of the heating element. The first temperature sensor element has a first width and a first length, and the seco…
- Who is the assignee on this patent?
- Continental Automotive Gmbh
- What technology area does this patent fall under?
- Primary CPC classification G01F1/6845. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 30 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).