| 摘要 |
An automotive piston engine has valves opened and closed by cams on a camshaft rotating within a cylinder head cover. The camshaft has cam carriers that rotate with but slide axially along the cam. Cam guides (19, 20, 21, 22, 23, 24) shift the cam carriers axially on the camshaft in opposite directions. The cam guides (22, 23, 24) have right or left helical grooves (19, 20). The right- and left-handed grooves are located immediately alongside and translating into each other. |
