Variable-lift valve train having at least two working positions

A variable-lift valve train for a gas exchange valve of an internal combustion engine, comprising:

• a lift adjuster with a working curve that is arrangeable at least in a first working position configured to set a partial lift and in a second working position configured to set a maximum lift, wherein the working curve has a lift region and a base circle region;
• a lift actuator, which has an actuating contour configured to deflect the lift adjuster;
• and
• a lift lever, which is deflectable via the working curve and thereby actuates a lift of the gas exchange valve, wherein
• the lift adjuster, the lift actuator, and lift lever each have a given contour which cooperate with one another in such a way that during the partial lift of the first working position and during the maximum lift of the second working position the gas exchange valve is actuated with substantially equal acceleration corresponding to a maximum valve acceleration.