Patent ID: 6067948
Filing Date: 2000-05-30
Classification: F01L

Abstract:
A device for actuating at least one gas exchange valve of an internal combustion engine, said device comprising:at least one gas exchange valve (12) arranged in a cylinder head (4) of an Internal combustion engine, said at least one valve (12) comprising a valve shaft (14, 16) and a closing spring (18) forcing said valve (12) into a closed position;a camshaft (6) having cams and an axis of rotation arranged such that said axis of rotation extends perpendicularly to a travel direction of said valve shaft (14, 16);a transmission arrangement positioned so as to be moveable parallel to said travel direction;said transmission arrangement comprising a transverse member (20) positioned between said cam shaft (6) and said valve shaft (14; 16) parallel to said cam shaft (6);said transmission arrangement further comprising rollers (22, 24) positioned on said transverse member on opposite sides of said valve shaft (14; 16);each one of said rollers (22, 24) cooperating with one of said cams (8, 10), wherein said cams (8, 10) have identical contours, wherein a cam movement of said cams is transmitted by said rollers (22, 24) onto said transverse member (20) performing a linear movement and wherein said linear movement of said transverse member (20) is transmitted onto said valve shaft (14; 16);said transmission arrangement further comprising a first slide (26) and a second slide (28) connected to opposed ends (34, 36) of said transverse member (20);said first and second slides (26, 28) configured to exclusively guide said transmission arrangement parallel to said travel direction of said valve shaft (14; 16) in the cylinder head (4), wherein the cylinder head (4) has a first bore (40) matching a shape of said first slide (26) and a second bore (42) matching a shape of said second slide (28), wherein said first and second slides (26, 28) are slidably, received in said first and second bores (40, 42), wherein said first and second slides (26, 28) are dome-shaped and have a part-circular cross-section.