Method for cold-start pre-warming of a pressure-charged internal combustion engine and/or of an exhaust gas aftertreatment device

A method for cold-start pre-warming at least one of a pressure-charged internal combustion engine and an exhaust gas aftertreatment device of the internal combustion engine,

• wherein a cold-starting aid is arranged in an intake duct and warms charge air while the internal combustion engine is stationary, and
• wherein the internal combustion engine comprises at least one working cylinder, which in each case has at least one inlet valve, which is connected to the intake duct, and at least one outlet valve, which is connected to an exhaust system, and further comprises a setting device for setting a valve position, and a pressure-charging device operable by an electric motor;
• the method, comprising the steps of
• detecting a cold start of the internal combustion engine;
• and
• after the detecting of the cold start,
• activating the cold-starting aid while the engine is stationary;
• activating operation of the pressure-charging device using the electric motor;
• and
• setting, by the setting device, a valve overlap between at least one inlet valve and at least one outlet valve of a working cylinder to deliver at least some of the charge air delivered by the pressure-charging device and pre-warmed by the cold-starting aid directly into the exhaust system.