IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0498481
(2003-01-15)
|
등록번호 |
US-7464680
(2008-12-16)
|
우선권정보 |
DE-102 04 672(2002-02-06) |
국제출원번호 |
PCT/EP03/000307
(2003-01-15)
|
§371/§102 date |
20050127
(20050127)
|
국제공개번호 |
WO03/067038
(2003-08-14)
|
발명자
/ 주소 |
- Geyer,Norbert
- Sailer,Peter
- Schnell,Oliver
|
출원인 / 주소 |
|
대리인 / 주소 |
Fitzpatrick, Cella, Harper & Scinto
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
110 |
초록
▼
The invention proposes a switching element (1) for a valve train of an internal combustion engine, particularly for valve deactivation, with a simple-to-implement measure for adjusting the coupling lash of its coupling means (8) in a receptacle (6) using two retaining rings (19, 20), one of which is
The invention proposes a switching element (1) for a valve train of an internal combustion engine, particularly for valve deactivation, with a simple-to-implement measure for adjusting the coupling lash of its coupling means (8) in a receptacle (6) using two retaining rings (19, 20), one of which is stocked in a variety of thicknesses.
대표청구항
▼
What is claimed is: 1. A method of adjusting coupling lash in a switching element for a valve train of an internal combustion engine, preferably for valve deactivation, having an outer part and an inner element that is axially displaceable in a bore therein, wherein the outer part and the inner ele
What is claimed is: 1. A method of adjusting coupling lash in a switching element for a valve train of an internal combustion engine, preferably for valve deactivation, having an outer part and an inner element that is axially displaceable in a bore therein, wherein the outer part and the inner element each have at least one receptacle aligned with each other in an axially separated relative position achieved by a lost motion spring, wherein one or more movable coupling means for coupling the inner element with the outer part are applied in one of the receptacles toward the other receptacle in their positions relative to one another, wherein a first upper stop for defining the relative position is applied between the inner element and the outer part, and wherein a hydraulic lash adjuster with a pressure piston is installed in the inner element, which pressure piston is fixed against moving axially out of the inner element by a second upper stop, characterized in that each of the upper stops is designed as at least one annular element such as a retaining ring and the upper stops are arranged on top of each other in the bore of the outer part, wherein as seen when looking into the bore of the outer part, the lower retaining ring forms the second upper stop and the first retaining ring, located above it, forms the first upper stop, wherein variable-thickness first and constant-thickness second retaining rings are provided at assembly of the retaining rings, and wherein the retaining ring stack contacts a stop such as an annular shoulder of the bore with the first retaining ring out of the bore, wherein provided as the upper stop in each case is at least one annular element such as a retaining ring, the bore of the outer part has a stop distant from the bore such as an annular shoulder, and as coupling means at least one piston is provided, which extends in the receptacle that is embodied as a radial bore of the inner element, having the following steps, which may also be supplemented with additional intermediate steps: a) snapping-in of the at least one second retaining ring into a region axially below the stop in such a way that the bore-distant edge of the pressure piston of the lash adjuster is pressed by the force of a compression spring of the lash adjuster against the second retaining ring and the latter is pressed against the stop; b) displacement of the inner element in the direction of the bore, with the coupling means extended in the receptacle of outer part, until the coupling means comes to bear against a lower surface of the receptacle; c) measurement of the free travel traversed by the inner element with the coupling means to the point of contact with the lower surface, and d) pairing of the at least one first retaining ring having such a thickness that, upon its subsequent snapping-in to a region axially below the stop, in contact with the second retaining ring, the inner element is displaced by the second retaining ring such that the coupling means extends at an equal distance from the receptacle at least in both axial directions. 2. A method for setting the mechanical lash to a predetermined desired value in a valve-deactivating lifter having a pin housing disposed in a lifter body wherein the housing is retained in the body by a retaining ring disposed in a retainer groove in the lifter body and extends radially inwards of an inner wall of said body, the pin housing having locking pins slidably disposed in a transverse bore for engaging a circumferential groove in the lifter body, said circumferential groove having a locking surface, comprising the steps of: a) installing said pin housing into said lifter body; b) engaging said locking pins with said circumferential groove; c) installing said retaining ring into said retainer groove; d) biasing said pin housing against said retaining ring; e) measuring a clearance between said locking pins and said locking surface; f) numerically subtracting a predetermined desired clearance value from said measured clearance to obtain a first numerical difference; g) selecting a spacer having a thickness equal to said first numerical difference; and h) installing said selected spacer in said retainer groove adjacent said retaining ring to yield said predetermined desired clearance (lash) in said lifter.
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