Internal combustion engines having an external mixture formation and compensation tank for avoiding reignition. An internal combustion engine is provided having an external mixture formation including at least one exhaust system, at least one intake system, the intake system including at least one intake manifold, at least one throttle valve, at least one mixture forming device, at least one compensation tank, and at least one air filter.

An internal combustion engine has a variable intake manifold with one or more intake manifold tuning valves. Controlling the intake manifold tuning valve(s) involves determining an operating mode switching point of the intake manifold tuning valve(s). The operating mode switching point initiates opening and closing movements of the intake manifold tuning valve(s). The operating mode switching point is determined based in part or more upon temperature of intake air in the variable intake manifold.

Internal combustion engines having an external mixture formation and compensation tank for avoiding reignition. An internal combustion engine is provided having an external mixture formation including at least one exhaust system, at least one intake system, the intake system including at least one intake manifold, at least one throttle valve, at least one mixture forming device, at least one compensation tank, and at least one air filter.