公开(公告)号：EP0178663B1

公开(公告)日：1991-12-18

申请号：EP85113193.8

申请日：1985-10-17

申请人： NISSAN MOTOR CO., LTD.

发明人： Muranaka, Shigeo ,  Ohkawa, Kouzaburou ,  Yokoyama, Junichi ,  Matayoshi, Yutaka ,  Kamegaya, Shigeru

IPC分类号： F02B31/02 ,  F02B29/00 ,  F02F1/42

CPC分类号： F02B31/00 ,  F02B1/04 ,  F02B17/00 ,  F02B2031/006 ,  F02D2200/0606 ,  F02F1/4214 ,  F02F2001/245 ,  Y02T10/146

公开(公告)号：EP0384361A3

公开(公告)日：1991-04-10

申请号：EP90103166.6

申请日：1990-02-19

申请人： NISSAN MOTOR CO., LTD.

发明人： Matayoshi, Yutaka ,  Kamegaya, Shigeru ,  Sakuragi, Shigeru ,  Komatsu, Hiroshi ,  Okawa, Kozaburo

IPC分类号： F01L1/30 ,  F01L31/22 ,  F01L1/18

CPC分类号： F01L1/30 ,  F01L1/18 ,  F01L13/0042 ,  Y10T74/2101

摘要： In a valve train for an I.C. engine, a cam shaft (1) has cams (2, 3) formed with compound curvatures which allow the valve timing to be altered while the engine is operating, to suit the engine driving conditions by shifting the cam shaft (1) along its axis. To reduce the force necessary to shift the cam shaft along its axis the valve closure springs are replaced by closure cams (3). In some embodiments pivoting arrangements comprising a pair of ball (11) and socket joints (7) are provided to eliminate lateral sway of the rocker arms allowing precise adjustment of the valve timing when the cam shaft is shifted along its axis. In other embodiments the rocker arms are journalled on a rocker shaft provided with stops for preventing lateral sway. In some embodiments the closure rocker arms (15) have cupped ends in which either the valve stem retainer (17) or the valve stem seal is received.