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- Hydraulic_tappet abstract "A hydraulic valve lifter, also known as a hydraulic tappet or a hydraulic lash adjuster, is a device for maintaining zero valve clearance in an internal combustion engine. Conventional solid valve lifters required regular adjusting to maintain a small clearance between the valve and its rocker or cam follower. This space allowed for thermal expansion, and prevented the parts from binding. This clearance space meant noisy operation and earlier wear, as the parts would rattle against one another until the parts heated up and expanded. The hydraulic lifter was designed to compensate for this tolerance, allowing the valve train to operate with zero clearance—leading to quieter operation, longer engine life, and eliminating the need for periodic adjustment of valve clearance.The hydraulic lifter, situated between the camshaft and each engine's valve, is a hollow steel cylinder encasing an internal piston. This piston is held at the outer limit of its travel with a strong spring. The lobed camshaft rhythmically presses against the lifter, which transmits the motion to the engine valve one of two ways: through a pushrod which actuates the valve via a rocker mechanism; or in the case of overhead camshafts, via direct contact with the valve stem.Oil under constant pressure is supplied to the lifter via an oil channel, through a small hole in the lifter body. When the engine valve is closed (lifter in a neutral position), the lifter is free to fill with oil. As the camshaft lobe enters the lift phase of its travel, it compresses the lifter piston, and a valve shuts the oil inlet. Oil is nearly incompressible, so this greater pressure renders the lifter effectively solid during the lift phase.As the camshaft lobe travels through its apex, the load is reduced on the lifter piston, and the internal spring returns the piston to its neutral state so the lifter can refill with oil. This small range of travel in the lifter's piston is enough to allow the elimination of the constant lash adjustment.".
- Hydraulic_tappet wikiPageID "5257363".
- Hydraulic_tappet wikiPageLength "7476".
- Hydraulic_tappet wikiPageOutDegree "9".
- Hydraulic_tappet wikiPageRevisionID "685275364".
- Hydraulic_tappet wikiPageWikiLink Backlash_(engineering).
- Hydraulic_tappet wikiPageWikiLink Cam_follower.
- Hydraulic_tappet wikiPageWikiLink Car.
- Hydraulic_tappet wikiPageWikiLink Category:Engine_components.
- Hydraulic_tappet wikiPageWikiLink Category:Engine_valves.
- Hydraulic_tappet wikiPageWikiLink Category:Valvetrain.
- Hydraulic_tappet wikiPageWikiLink Cylinder_head.
- Hydraulic_tappet wikiPageWikiLink Internal_combustion_engine.
- Hydraulic_tappet wikiPageWikiLink Tappet.
- Hydraulic_tappet wikiPageWikiLinkText "Hydraulic tappet".
- Hydraulic_tappet wikiPageWikiLinkText "Hydraulic valve adjuster".
- Hydraulic_tappet wikiPageWikiLinkText "Hydraulic valve lifters".
- Hydraulic_tappet wikiPageWikiLinkText "hydraulic lash adjusters".
- Hydraulic_tappet wikiPageWikiLinkText "hydraulic lifter".
- Hydraulic_tappet wikiPageWikiLinkText "hydraulic tappet".
- Hydraulic_tappet wikiPageWikiLinkText "hydraulic valve lifters".
- Hydraulic_tappet wikiPageWikiLinkText "hydraulic valve tappets".
- Hydraulic_tappet wikiPageWikiLinkText "hydraulic".
- Hydraulic_tappet wikiPageWikiLinkText "hydraulically self-adjusting valves".
- Hydraulic_tappet wikiPageWikiLinkText "tappets".
- Hydraulic_tappet wikiPageWikiLinkText "valve clearance".
- Hydraulic_tappet wikiPageWikiLinkText "valve lifters".
- Hydraulic_tappet wikiPageUsesTemplate Template:Aircraft_piston_engine_components.
- Hydraulic_tappet wikiPageUsesTemplate Template:Automotive_engine.
- Hydraulic_tappet wikiPageUsesTemplate Template:Citation_needed.
- Hydraulic_tappet wikiPageUsesTemplate Template:Multiple_issues.
- Hydraulic_tappet wikiPageUsesTemplate Template:Original_research.
- Hydraulic_tappet wikiPageUsesTemplate Template:Refimprove.
- Hydraulic_tappet wikiPageUsesTemplate Template:Reflist.
- Hydraulic_tappet subject Category:Engine_components.
- Hydraulic_tappet subject Category:Engine_valves.
- Hydraulic_tappet subject Category:Valvetrain.
- Hydraulic_tappet hypernym Device.
- Hydraulic_tappet type Device.
- Hydraulic_tappet type Component.
- Hydraulic_tappet type Redirect.
- Hydraulic_tappet comment "A hydraulic valve lifter, also known as a hydraulic tappet or a hydraulic lash adjuster, is a device for maintaining zero valve clearance in an internal combustion engine. Conventional solid valve lifters required regular adjusting to maintain a small clearance between the valve and its rocker or cam follower. This space allowed for thermal expansion, and prevented the parts from binding.".
- Hydraulic_tappet label "Hydraulic tappet".
- Hydraulic_tappet sameAs Q361723.
- Hydraulic_tappet sameAs Hydrostößel.
- Hydraulic_tappet sameAs ラッシュアジャスター.
- Hydraulic_tappet sameAs m.0db60g.
- Hydraulic_tappet sameAs Гидрокомпенсатор.
- Hydraulic_tappet sameAs Q361723.
- Hydraulic_tappet wasDerivedFrom Hydraulic_tappet?oldid=685275364.
- Hydraulic_tappet isPrimaryTopicOf Hydraulic_tappet.