Hydraulic Valve Lash Adjustment (HLA)
In previous page we already share and show you the Hydraulic Valve Lash Adjustment mechanical elements, features and how its work. Today i will writedown the the features and the function of Roller Finger Follower Valve Train. See the Explanation and figures below :
 |
| Hidraulic Valve Lash Adjustment |
Features
Roller Finger Follower Valve Train With Hydraulic Pivot Element
 |
| Sheet Metal Finger Follower and Pivot Element |
- Contact between the finger follower and cam is preferably given by means of a needle bearing cam controller.
- Very low valve train friction.
- Very simple assembly af cylinder head.
- Oil can be easy fed from the cylinder head.
- Very little space required.
Sheet Metal Finger Follower ⓐ
① Cam roller
② Oil Spray bore
③ Retaining clip
④ Valve flange
Pivot elements ⓒ
 |
| Cast Finger Follower and Pivot Element |
⑥ Housing
⑦ retaining ring (polygon ring)
⑧ Venting hole / pressure relief hole
Ⓐ Sheet metal finger follower with cam roller ⓐ and pivot element ⓒ
- Formed from sheet metal
- Height of valve flange ④ on valve is freely selectable
- Optionally with oil spray bore ②
- Optionally with retaining clip ③
- Simplified cylinder head assembly
- Very large load bearing surfaces in the half sphere area and valve contract face
- Highly cost effective.
Ⓑ Cast Finger Follower with cam roller ⓑ and pivot element ⓒ
- Complex lever geometris possible
- High load carrying capacity
- High rigidity dependent on design
- Low mass moment of inertia dependent on design.
Hydraulic pivot element ⓒ
- Held together by means of polygon ring ⑦
- reliable support of high transverse forces.
In the next share we will show you the mechanism, features and the components of Rocker Arm Valve Train Components.