INTERNAL COMBUSTION ENGINE

To suppress wear of a valve guide while keeping a function of capable of removing a foreign matter adhering to a valve stem.SOLUTION: A valve stem 20 of an exhaust valve 14 includes a small diameter part 21, a large diameter part 24, a carbon cut part 22 and a boundary part 23. The boundary part 23...

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Bibliographische Detailangaben
Hauptverfasser:	SUZUKI MASARU, MINODA TOSHIKI, NAKAWATASE AKIRA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BLASTING CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	To suppress wear of a valve guide while keeping a function of capable of removing a foreign matter adhering to a valve stem.SOLUTION: A valve stem 20 of an exhaust valve 14 includes a small diameter part 21, a large diameter part 24, a carbon cut part 22 and a boundary part 23. The boundary part 23 is formed into a circular arc shape on a valve longitudinal section so that a second virtual straight line L13 becomes a tangent line, while the carbon cut part 22 has a part coming into contact with a third virtual straight line L22.SELECTED DRAWING: Figure 2 【課題】バルブステムに付着した異物を除去できる機能を維持しつつ、バルブガイドの摩耗を抑制できるようにすること。【解決手段】排気バルブ１４のバルブステム２０は、小径部２１、大径部２４、カーボンカット部２２及び境界部２３を備えている。バルブ縦断面上において、境界部２３は、第２仮想直線Ｌ１３が接線となるような円弧をなしており、カーボンカット部２２は第３仮想直線Ｌ２２に接する部分を有している。【選択図】図２