Valve trains for internal combustion engines and internal combustion engines

Abstract

The invention relates to a valve train for an internal combustion engine and an internal combustion engine with a fully loaded rocker arm, a partly loaded rocker arm and a switching element, the partly loaded rocker arm being rotatable about the arm axis via a second cam of the camshaft, the second cam With a second cam protrusion protruding radially outwards relative to the cam base circle, the switching element comprises a switch bolt and a stop, the stop is arranged at the full load rocker arm or at the part load rocker arm, the switch bolt is at the other , that is, at the part-load rocker arm or at the full-load rocker arm is guided so that it is displaceable in the direction of propulsion, so that in the inactivated state of the switching element, the full-load rocker arm via the coupling of the part-load rocker arm to the full-load rocker The loaded rocker arm rotates together with the partially loaded rocker arm, which is characterized in that the second cam of the camshaft additionally has a cam profile which is set back radially inwards relative to the corresponding cam base circle, so that for the partial load rocker arm and the full load rocker arm The coupling and decoupling of the arms ensures a defined movement of the switch bolt.

Description

technical field [0001] The invention relates to a valve train and an internal combustion engine. Background technique [0002] A valve train for a marine diesel internal combustion engine is known from DE 10 2008 027 649 A1. The valve train disclosed there has: a full-load rocker arm (Volllastschwinghebel) for actuating valve lifters (Ventilstoessel) of the valves of the internal combustion engine in the full-load operating range of the internal combustion engine; and a part-load rocker arm for a part of the internal combustion engine Actuation of the lifter in the load operating range, in which the full load rocker arm is rotatable about the arm axis via the first cam of the camshaft and in which the part load rocker arm is rotatable about the arm axis via the second cam of the camshaft . The first cam of the first camshaft for actuating the fully loaded rocker arm has a first cam projection projecting radially outward relative to the cam base circle. The second cam of t...

AI Technical Summary

Problems solved by technology

In this critical intermediate position, there is a risk of plastic deformation of the components for the switching bolt, as a result of which the switching bolt can be damaged and the valve train of the internal combustion engine then fails.

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