# US 2017/0254635 A1 · Method of detecting lift amount of valve

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- Number: US 2017/0254635 A1
- Document ID: US20170254635A1
- Status: Published application
- Kind: A1
- Application number: 15/440,563
- Filed: 2017-02-23
- Published: 2017-09-07
- Earliest claimed: 2016-03-04
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Shoichi ISHIGAKI; Masatsugu KAJIWARA
- Web page: https://patentgrep.com/patent/US20170254635A1

## CPC

- G01B 7/14: for measuring distance or clearance between spaced objects or spaced apertures (G01B7/30 takes precedence)
- F01L 3/24: Safety means or accessories, not provided for in preceding sub- groups of this group
- G01B 5/0032: {Valves, actuating devices for valves}
- G01D 5/202: {by movable a non-ferromagnetic conductive element (G01D5/2033 takes precedence)}
- F01L 3/10: Connecting springs to valve members
- F01L 2303/00: Manufacturing of components used in valve arrangements
- F01L 2303/01: Tools for producing, mounting or adjusting, e.g. some part of the distribution
- F01L 2820/045: Valve lift
- G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR

## Abstract

According to a method of detecting a lift amount of a valve, an area-increasing jig is attached to an upper surface of a retainer attached to the valve. The area-increasing jig has a larger width than a width of the upper surface of the retainer. Then a lift amount of the valve is detected by measuring a distance to the area-increasing jig by using a non-contact sensor disposed above the retainer.

## Claims

### Claim 1

A method of detecting a lift amount of a valve, the method comprising:
attaching an area-increasing jig to an upper surface of a retainer attached to the valve, the area-increasing jig having a larger width than a width of the upper surface of the retainer; and
detecting a lift amount of the valve by measuring a distance to the area-increasing jig by using a non-contact sensor disposed above the retainer.

### Claim 2 (depends on 1)

The method according to claim 1, wherein
the lift amount of the valve is detected by using the area-increasing jig that is in a form of a plate and includes a groove continuously extending from a portion of a side surface of the area-increasing jig toward a center of the area-increasing jig.