What is hydraulic valve lash adjuster

[Noz_Ziad]

hi guys i just wanted to ask that what the hell is hydraulic valve lash adjuster.plz explain to me in lame man terms(simple)......plz reply thanks

[spectra]

It works through oil to maintain specified clearance between Cam Lobe and Valve top. It is placed between the two of them. I can be wrong but this is my idea.

[levin]

Components with hydraulic valve lash adjustment

The engineers at INA were the pioneers in the market niche for low-maintenance valve trains in high-speed internal combustion engines – with direct valve activation by means of hydraulic tappets. the new concept passed its first test in 1974 when it was adopted by Mercedes Benz for volume usage in the 8-cylinder engines for its luxury class vehicles – not least because of the significantly lower exhaust emissions from the lash-free valve train. At the same time, Porsche proved in preproduction tests in a racing car (917) that very high speeds could be achieved with our valve trains.

Advantages of automatic valve lash adjustment:

Simple engine assembly
Maintenance-free throughout the operating life
Very quiet valve train
Consistently low exhaust emissions throughout the operating life

[levin]

Hydraulic insert element with contact pad

The contact pad made from hardened steel
Supported with a swivel facility on the insert element by means of a ball/socket joint
Very low contact pressures in the cam contact area
Advantages of hydraulic valve lash adjustment correspond to those of the tappet

[levin]

Delphi was the first to develop a direct acting hydraulic valve lifter and the first to incorporate the hydraulic valve lifter into production vehicles.
Delphi offers one of the industry’s most comprehensive lines of conventional valve train products. Today, more efficient, performance-oriented Delphi valve train systems are helping vehicle manufacturers meet stringent emissions requirements

[spectra]

so rashid bhai i was right with my layman language

[levin]

yea:)