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公开(公告)号：US6047473A
公开(公告)日：2000-04-11
申请号：US217487
申请日：1998-12-21
CPC分类号： F02F1/4228 , Y02T10/146 , Y10T29/4927
摘要： A cylinder head for an internal combustion engine of the reciprocating piston type includes a helical inlet port with a flat wall portion in a section of the port upstream of a bowl-shaped recess about a valve stem guide. The flat walled section meets a generally cylindrical portion of the recess adjacent a cusp-shaped swirl edge. The orientation of the flat portion with respect to a reference feature, such as the axis of the valve stem guide, may then be used as a measure of the accuracy of casting of the inlet port, and may also be altered if so desired to vary the swirl characteristics of the inlet port.
摘要翻译： 用于往复式活塞式内燃机的气缸盖包括螺旋形入口，其具有在围绕阀杆引导件的碗形凹槽的上游侧的端口的一部分中的平坦壁部分。 平壁部分与凹口形漩涡边缘相邻的凹部的大致圆柱形部分相交。 然后可以将扁平部分相对于参考特征（诸如阀杆引导件的轴线）的取向用作入口端口的铸造精度的量度，并且如果需要改变，也可以改变 入口的旋流特性。
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公开(公告)号：US6055727A
公开(公告)日：2000-05-02
申请号：US218468
申请日：1998-12-22
申请人： Allan Brignall , Philip Baker , Paul Turner
发明人： Allan Brignall , Philip Baker , Paul Turner
CPC分类号： F02F1/4228 , Y02T10/146 , Y10T29/4927
摘要： A cylinder head for an internal combustion engine includes a helical inlet port with a sharp edge swirl lip on a generally cylindrical valve stem recess. The helical inlet port has an inlet passage, a bowl-shaped chamber which has a rim that terminates in an annular valve seat and which encompasses an annular space about a generally cylindrical valve stem guide for a poppet valve stem. One surface of the bowl meets one wall of the inlet passage along a swirl edge, which has a radius of less than about 0.5 mm, and preferably a sharp edge with a radius of less than about 0.1 mm. Such swirl edges may be formed by casting the inlet port with excess material, which is then machined away only within the bowl along a cylindrical cutting line.
摘要翻译： 用于内燃机的气缸盖包括在大致圆柱形的阀杆凹部上具有锋利的边缘涡流唇缘的螺旋入口。 螺旋入口具有入口通道，碗形室具有终止于环形阀座的边缘，并且围绕用于提升阀杆的大致圆柱形的阀杆引导件包围环形空间。 碗的一个表面沿着旋转边缘与入口通道的一个壁相交，半径小于约0.5mm，优选地具有半径小于约0.1mm的尖锐边缘。 这样的涡流边缘可以通过用多余的材料浇铸入口端而形成，然后其沿着圆柱形切割线仅在碗内被加工掉。
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