ENGINE PISTON STRUCTURE

• Main Authors: FUKUDA YUKIYOSHI, ISHIKAWA MASARU, NITTA MASATOSHI, MORI TSUNEHIRO, NISHIMORI KAZUYA, KANDA YASUNORI
• Format: Patent
• Language: English; Japanese
• Published: 22.03.2016
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BEARINGS; BLASTING; COMBUSTION ENGINES; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; SHOCK-ABSORBERS; SPRINGS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To enable a dynamic vibration absorber 20 to increase a degree of freedom of tuning for vibration reduction and stabilize vibration reduction characteristic of the dynamic vibration absorber 20 when the dynamic vibration absorber 20 is provided inside a sectional hollow piston pin 2.SOLUTION: In an engine piston structure including the dynamic vibration absorber 20 that is provided inside the sectional hollow piston pin 2 to suppress integrated resonance of a piston 1, the piston pin 2, and a small end part 10a of a con rod 10 with respect to a large end 10b of the con rod 10 during a combustion process, fluid 31 is filled between the piston pin 2 and the dynamic vibration absorber 20.SELECTED DRAWING: Figure 3 【課題】断面中空のピストンピン２の内部に動吸振器２０を設ける場合に、その動吸振器２０による振動低減のチューニングの自由度を高めることができるようにするとともに、動吸振器２０による振動低減特性の安定化を図ることができるようにする。【解決手段】断面中空のピストンピン２の内部に設けられ、燃焼行程においてピストン１、ピストンピン２及びコンロッド１０の小端部１０ａが一体でコンロッド１０の大端部１０ｂに対して共振するのを抑制する動吸振器２０を備えた、エンジンのピストン構造において、ピストンピン２と動吸振器２０との間に、液体３１を封入する。【選択図】図３