Method for determining wastegate valve lift

An internal combustion engine, comprising:

• at least one cylinder;
• a compression device including a compressor arranged along an intake manifold and a turbine arranged along an exhaust passage;
• a wastegate arranged along the exhaust passage, the wastegate including a wastegate valve coupled to an actuator via a linkage;
• and
• an engine controller including a logic subsystem and a storage subsystem holding instructions thereon executable by the logic subsystem to:
• determine a relation between a position of the actuator and a lift of the wastegate valve at start-up of the engine in a temperature range;
• and
• modify the relation based on a difference between a desired boost level and an actual boost level.

A method, comprising:

• identifying a relation between an actuator position and a lift of a wastegate valve at engine start-up in a temperature range;
• and
• after start-up, modifying the relation based on a difference between a desired boost level and an actual boost level;
• wherein the relation yields a decreased lift for a given actuator position at an upper end of the temperature range and yields an increased lift for a given actuator position at a lower end of the temperature range.