Abstract: A mixture supply system with quantitative mixture control comprises a charging system connectable to an internal combustion engine, comprising a bypass and a bypass valve, and a valve train for periodically actuating an intake valve of the internal combustion engine. A valve control time of the intake valve is controllable by the valve train. The system is configured to at least partially close the bypass valve and change the valve control time for extending the valve opening duration upon increase of an engine load, to at least partially open the bypass valve during and/or after expiration of a valve train latency time, and/or to at least partially open the bypass valve and change the valve control time for decreasing the valve opening duration upon an decrease of an engine load, and to at least partially close the bypass valve during and/or after expiration of a valve train latency time.

Abstract: Described herein is an air feed system for an internal combustion engine. The air feed system includes a charge air receiver for receiving charge air and a starting air system. The starting air system is designed to feed starting air, in particular from a starting air feed, to the cylinder of the internal combustion engine intermittently during a starting process of the internal combustion engine. The charge air receiver is connected to the starting air system via a charge air shut-off valve in order to feed charge air from the charge air receiver to the starting air system during partial-load operation of the internal combustion engine, such that the starting air system feeds charge air to the cylinder intermittently during partial-load operation of the internal combustion engine. Also described herein are an internal combustion engine and a method for operating an internal combustion engine.

Abstract: The disclosure relates to a valve train for an internal combustion engine and to an internal combustion engine. The valve train has an inlet valve actuation mechanism for the periodic actuation of an inlet valve of the internal combustion engine. The valve train also has a delay element, which is in contact with the inlet valve actuation mechanism and which has a hydraulic chamber for delaying a closing movement of the inlet valve by means of a hydraulic medium. The valve train has a hydraulic feed for feeding the hydraulic medium into the hydraulic chamber, the hydraulic feed having a control shaft, and the control shaft being mechanically driven by the internal combustion engine. The control shaft has an axially extended cavity for the hydraulic medium, and at least one opening for intermittently feeding the hydraulic medium from the cavity to the hydraulic chamber.