EXHAUST VALVE STRUCTURE OF VEHICLE

• Main Author: KOGA YOSHITAKA
• Format: Patent
• Language: English; Japanese
• Published: 14.12.2017
• Subjects: BLASTING; BRAKES; CLUTCHES; COUPLINGS FOR TRANSMITTING ROTATION; ENGINE PLANTS IN GENERAL; ENGINEERING ELEMENTS AND UNITS; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide an exhaust valve structure of a vehicle capable of protecting an actuator by accomplishing high heat insulation characteristics.SOLUTION: An exhaust valve 5 is supported by a turning shaft 3 within an exhaust passage 2 in such a way that it can be opened or closed, and an output shaft 8a of an actuator 8 arranged near the exhaust passage 2 is oppositely faced against the turning shaft 3 and connected by a joint member 9 made of metallic material. An outer peripheral surface of the joint member 9 is formed with slits 9a alternatively arranged from two directions with their phases being oppositely faced against an axis line L by 180°, and a plate-like conduction part 9b between each of the slits 9a is formed to be continuous in a direction of axis line through a connecting part 9c left at the deepest part of each of the slits 9a, thereby a thermal conduction path within the joint member 9 is extended and also a thermal conduction area is reduced. In addition, either a shape or an arrangement of the slits 9a is set in such a way that a sufficient rigidity can be assured at the joint member 9 and an elastic deformation of the joint member 9 in its twisting direction at the time of transmittance of rotation is restricted.SELECTED DRAWING: Figure 1 【課題】高い断熱性を達成してアクチュエータを保護できる車両の排気バルブ構造を提供する。【解決手段】排気通路２内で排気バルブ５を回動軸３により開閉可能に支持し、排気通路２の近傍に配設されたアクチュエータ８の出力軸８ａを回動軸３に相対向させて金属材料からなるジョイント部材９により連結する。ジョイント部材９の外周面に軸線Ｌに対して180°位相を対向させた２方向から交互にスリット９ａを形成し、各スリット９ａの最奧部に残された連結部９ｃを介して各スリット９ａ間の板状伝導部９ｂが軸線方向に連なる形状とすることで、ジョイント部材９内での熱伝導経路を延長化し且つ熱伝導面積を縮小する。また、ジョイント部材９に十分な剛性が確保されるようにスリット９ａの形状や配置等を設定し、回転伝達時のジョイント部材９の捩り方向の弾性変形を抑制する。【選択図】図１