Mechanically controllable valve train assembly, internal combustion engine and method for operating an internal combustion engine

摘要

A valve train assembly for an engine comprising cylinders, each comprising a gas inlet and a gas outlet valve. A camshaft comprises a peripheral contour. A valve stroke adjusting device comprises a control shaft comprising control contours. An intermediate lever arrangement comprises an intermediate lever comprising a working curve which cooperates with a swivel lever, and an engagement element connected to a control contour. Each intermediate lever is connected to the peripheral contour. A transmission arrangement provides that an intermediate lever arrangement and a swivel lever arrangement is associated with each gas inlet valve. A control contour for an idle range is similar to a control contour for a full-load range. A control contour for a part-load range of a gas inlet valve of a shut-off cylinder comprises a section different to a control contour for a part-load range of the gas inlet valve of a remaining cylinder.

主权项

1. A mechanically controllable valve train assembly for an internal combustion engine comprising cylinders, at least one of which is a shut-off cylinder and at least one of which is a remaining cylinder, each of the cylinders comprising at least one gas inlet valve and at least one gas outlet valve, the mechanically controllable valve train assembly comprising:
at least one swivel lever arrangement, each of the at least one swivel lever arrangement comprising a swivel lever; a camshaft comprising a peripheral contour; a valve stoke adjusting device comprising a control shaft comprising control contours arranged thereon; at least one intermediate lever arrangement, each of the at least one intermediate lever arrangement comprising,
an intermediate lever comprising a working curve configured to cooperate with the swivel lever, andan engagement element configured to be operatively connected to one of the control contours of the valve stoke adjusting device so that different valve strokes are adjustable and a zero stroke adjustment of the at least one gas inlet valve of the at least one shut-off cylinder exists,each intermediate lever being configured to be operatively connected to the peripheral contour of the camshaft; at least one transmission arrangement, each of the at least one transmission arrangement being arranged so that one of the at least one intermediate lever arrangement and one of the at least one swivel lever arrangement is associated with each of the at least one gas inlet valve, wherein, with respect to the control contours, a control contour for an idle range is substantially identical in design to a control contour for a full-load range, and a control contour for a part-load range of the at least one gas inlet valve assigned to the shut-off cylinder comprises a section having a different design compared to a control contour for a part-load range of the at least one gas inlet valve of the remaining cylinder.