For the controlling of a variable stroke of gas exchange valve 10 for the purpose of achieving an extremely short opening duration of the gas exchange valve in partial load and low load operation of {HEAD ~ the internal combustion engine}, there is connected to pump outlet 38 an additional relief opening that can be optionally closed by {TAIL ~ an electrically controllable closing valve} 40 
For the controlling of a variable stroke of gas exchange valve 10 for the purpose of achieving an extremely short opening duration of the gas exchange valve in partial load and low load operation of { HEAD ~ the internal combustion engine } , there is connected to pump outlet 38 an additional relief opening that can be optionally closed by { TAIL ~ an electrically controllable closing valve } 40
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