Patent ID: 6640761
Filing Date: 2003-11-04
Classification: F01L

Abstract:
A control device for at least one spring-loaded intake or exhaust valve of an internal combustion engine with one adjustment element and at least one control element (2, 2â€², 2 â€³ and 1, 1â€² respectively) in whicha) the adjustment element (2, 2â€², 2â€³) has a base body capable of motion and is located between at least one control element (1, 1â€²) and the valve, b) the at least one control element (1, 1â€²) rotates during the operation of the control device, c) through the at least one rotating control element (1, 1â€²), at least two rotating control element circumferential areas are present as control contours (4, 5) with differing contours around the circumference, d) on the base body of the adjustment element (2, 2â€², 2â€³) are provided at least two force introduction areas KEB (6, 7), capable of being, positioned differently relative to each other, and one force transfer area KUB (3), e) the force transfer area (3) acts on the at least one engine valve, f) switching means are provided within the base body for alternatively correlating the KEB areas (6, 7) to the differing control curve areas (4, 5 ) of the control element (1, 1â€²) for the purpose of force transmission, g) the control element (1, 1â€²) exclusively has control curve areas which can be correlated, for the purpose of force transmission, to the KEB areas (6, 7) located within the base body of the adjustment element (2, 2â€², 2â€³), h) for alternatively correlating the KEB areas (6, 7) to the differing control curve areas of the control element (1, 1â€³), different positions relative to each other of all KEB and KUB areas (6, 7) and (3) respectively can be set with the switching means (10, 13) in relation to the distance between the control element (1, 1â€²) and the valve whereby this is limited only by the control curves of the control element (1, 1â€²), wherein;i) one of the two KEB areas (6, 7) as well as the KUB area (3) are adjustably mounted in the base body of the adjustment element (2, 2â€², 2â€³), j) by a change in the correlation to each other between the one KUB area (3) and the at least two KEB areas (6, 7), the switching means (10, 13) cause an exclusively hydraulic adjustment and locking of the adjustable KEB and KUB areas (6, 7) and (3) respectively within the base body of the adjustment element (2, 2â€², 2â€³), k) the KEB area (6 or 7) not required to transmit force at the time, can be switched into a position by the switching means (10, 13) where it is not in contact with the correlated control curve of control element (1, 1â€²).