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1. 发明授权

US06053141A Cylinder head for internal-combustion engines 失效
标题翻译：内燃机气缸盖
公开(公告)号：US06053141A
公开(公告)日：2000-04-25
申请号：US996209
申请日：1997-12-22
申请人： Martin Mutterer , Eckhart Nitzschke , Tilmann Roemheld , Willy Treyz
发明人： Martin Mutterer , Eckhart Nitzschke , Tilmann Roemheld , Willy Treyz
IPC分类号： B22D19/00 , F02F1/24 , F02F1/42
CPC分类号： F02F1/4285 , B22D19/0018 , F02F2001/245 , F02F2200/06
摘要： A cast cylinder head for an internal-combustion engine, in which the charge cycle ducts have a fluctuating duct offset relative to the valve opening caused by the casting technique. Proximate the opening, the charge cycle ducts are provided with a machining allowance which increases toward the duct end and are machined there in a cutting manner so that the interior surface of the charge cycle ducts changes in each case without an offset into the valve opening. In order to achieve a simple tool guiding and nevertheless a machining which is advantageous to the flow, a compensating groove is arranged in the machining allowance of the charge cycle ducts which has a flat V-shaped cross-section and extends in the circumferential direction, specifically--relative to the flow direction--at least in the area of a convex course of the duct wall. The groove flanks have a convex cross-section and are curved to be as free of flow separations as possible. The compensating groove extends at a distance above the upper edge of the valve seat ring which corresponds to approximately 20 to 30% of the inside diameter of the valve opening. The groove base is situated outside the ideal course of the duct surface. The compensating groove extends at least approximately in a plane which is situated approximately at a right angle relative to the duct center line. The depth of the groove measured to the duct tangent corresponds approximately to the maximal core offset.
摘要翻译：一种用于内燃机的铸造气缸盖，其中充电循环管道具有由铸造技术引起的相对于阀门开口偏移的波动管道。为了使开口近似，充电循环管道具有朝向管道端部增加的加工余量，并且以切割方式在那里加工，使得充电循环管道的内表面在每种情况下改变而没有偏移到阀开口中。为了实现简单的工具引导，但是对于流动有利的加工，补偿槽被布置在具有平坦的V形横截面并在圆周方向上延伸的充电循环管道的加工余量中，特别是相对于流动方向 - 至少在管道壁的凸出过程的区域中。槽侧面具有凸形横截面，并且弯曲成尽可能没有流动分离。补偿槽在阀座环的上边缘上方延伸一段距离，其对应于阀开口内径的大约20至30％。槽底座位于管道表面的理想过程之外。补偿槽至少大致在相对于管道中心线大致成直角的平面中延伸。测量到管道切线的槽的深度大致对应于最大的芯偏移。

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