Abstract: A device for an internal combustion engine, in particular a spark ignition engine, with a length-adjustable connecting rod and a sensor unit for detecting the adjustment in length of the connecting rod is provided. The length-adjustable connecting rod comprises a first connecting rod member for receiving a piston pin and a second connecting rod member for receiving a crankshaft journal, where the distance in length between the piston pin and the crankshaft journal is adjustable by way of the connecting rod. The sensor unit comprises a sensor and an index region provided on the length-adjustable connecting rod, where a property of the index region that is dependent upon the adjustment in length of the connecting rod can be detected by way of the sensor. An internal combustion engine with such a device, comprises a length-adjustable connecting rod and a sensor unit as well as the use of such a sensor unit and a length-adjustable connecting rod.

Abstract: An articulated chain includes alternate outer chain links and inner chain links interconnected by respective chain joints. The outer chain links comprise two outer link plates that are spaced apart in parallel, the outer link plates having two pin holes, which are spaced apart in the link-plate longitudinal direction and which each have fixedly arranged therein a respective joint pin of the chain joints. The inner chain links comprise two inner link plates that are spaced apart in parallel, and the joint pin being pivotably arranged in a joint opening of the inner chain links. The outer link plates comprise at least one expansion opening between the pin holes in order to reduce the bending of the joint pin and the surface pressure in the joint opening of the inner chain links, so as to improve the sliding behavior and the wear properties of the chain joints.