Patent ID: 9074495
Filing Date: 2015-07-07
Classification: F01L

Abstract:
1. A mechanically controllable valve-train assembly comprising: a plurality of serially arranged gas exchange valves; at least two serially arranged cylinders each of which have at least two of the plurality of gas exchange valves assigned thereto; valve-lift adjusting devices, each of the valve-lift adjusting devices comprising an eccentric shaft configured to be rotatable, the eccentric shaft comprising at least one cam element and circumferential control surfaces which comprise at least one eccentric member, the eccentric shaft being configured to be driven by a drive device so that various valve-lift positions can be set; a camshaft; a cylinder head; a bearing device; a transmission assembly assigned to each of the plurality of gas exchange valves, each transmission assembly being mounted in the cylinder head via the bearing device so as to be movable, and each transmission assembly being operatively connected to one of the valve-lift adjusting devices and to the camshaft; a spring-loaded tappet element; and a roller bearing; wherein, the at least one cam element of the eccentric shaft is operatively connected to the spring-loaded tappet element and is arranged outside the circumferential control surfaces when viewed in a longitudinal direction of the eccentric shaft, and, when viewed in a circumferential direction of the eccentric shaft, is arranged at a level of a zero-lift position of the circumferential control surfaces, and the spring-loaded tappet element is configured to directly act on the circumferential control surfaces of the eccentric shaft via the rolling bearing.