Method and apparatus for determining a compression ratio and for adapting an actuator for variably setting a compression ratio in an internal combustion engine

摘要

The invention relates to a method for determining a compression ratio (ε) in a cylinder (3) of an internal combustion engine (2), comprising the following steps: - setting or determining a charge in one of the cylinders (3) of the internal combustion engine (2); - Determining an indication of a speed decrease of the internal combustion engine (2) due to a compression stroke of the cylinder (3); and - determining a compression ratio (ε) depending on the information about the speed decrease and depending on the set or specific filling of the cylinder (3).