Switchable cam tracker for engine valve drive, with at least one web forms in sectors or completely of injectable foam material

摘要

The cam tracker (1) is in the form of a cup tappet and consists of two sections (2, 3) moving axially relative to each other, each with a transverse web (7, 8) in which there are recesses (9, 10) for coupling devices (17). At least one of these webs is made at least partly of an injectable foam material such as aluminum foam.