Mixture supply system (100, 300, 400, 500) for an internal combustion engine with quantitative mixture control, in particular a gas engine or a dual fuel engine, the mixture supply system (100, 300, 400, 500) comprising: a supercharging system (110, 310, 410, 510) which can be connected to the internal combustion engine and has a bypass (120, 320, 420, 520) and a bypass valve (121, 124, 321, 324, 421, 424, 521, 524) arranged in the bypass (120, 320, 420, 520); a valve drive for periodic actuation of an inlet valve of the internal combustion engine, wherein a valve control timing of the inlet valve can be controlled by the valve drive; wherein the mixture supply system (100, 300, 400, 500) is configured - to at least partially close the bypass valve (121, 124, 321, 324, 421, 424, 521, 524) and to modify the valve control timing to lengthen the valve opening duration when the engine load is increasing, and to at least partially open the bypass valve (121, 124, 321, 324, 421, 424, 521, 524) during and/or after termination of a valve drive latency period; and/or - to at least partially open the bypass valve (121, 124, 321, 324, 421, 424, 521, 524) and to modify the valve control timing to shorten the valve opening duration when the engine load is decreasing, and to at least partially close the bypass valve (121, 124, 321, 324, 421, 424, 521, 524) during and/or after termination of a valve drive latency period. a supercharging system (110, 310, 410, 510) which can be connected to the internal combustion engine and has a bypass (120, 320, 420, 520) and a bypass valve (121, 124, 321, 324, 421, 424, 521, 524) arranged in the bypass (120, 320, 420, 520); a valve drive for periodic actuation of an inlet valve of the internal combustion engine, wherein a valve control timing of the inlet valve can be controlled by the valve drive; wherein the mixture supply system (100, 300, 400, 500) is configured - to at least partially close the bypass valve (121, 124, 321, 324, 421, 424, 521, 524) and to modify the valve control timing to lengthen the valve opening duration when the engine load is increasing, and to at least partially open the bypass valve (121, 124, 321, 324, 421, 424, 521, 524) during and/or after termination of a valve drive latency period; and/or - to at least partially open the bypass valve (121, 124, 321, 324, 421, 424, 521, 524) and to modify the valve control timing to shorten the valve opening duration when the engine load is decreasing, and to at least partially close the bypass valve (121, 124, 321, 324, 421, 424, 521, 524) during and/or after termination of a valve drive latency period. - to at least partially close the bypass valve (121, 124, 321, 324, 421, 424, 521, 524) and to modify the valve control timing to lengthen the valve opening duration when the engine load is increasing, and to at least partially open the bypass valve (121, 124, 321, 324, 421, 424, 521, 524) during and/or after termination of a valve drive latency period; and/or - to at least partially open the bypass valve (121, 124, 321, 324, 421, 424, 521, 524) and to modify the valve control timing to shorten the valve opening duration when the engine load is decreasing, and to at least partially close the bypass valve (121, 124, 321, 324, 421, 424, 521, 524) during and/or after termination of a valve drive latency period.