Given a plurality of gas exchange valves in the internal combustion engine, each having an associated control device, {HEAD ~ both the load control} and the phase displacement of all the gas exchange valves can be carried out through identical rotation of the pump plungers, or {TAIL ~ identical axial displacement} of the spool valves of all the control devices 
Given a plurality of gas exchange valves in the internal combustion engine , each having an associated control device , { HEAD ~ both the load control } and the phase displacement of all the gas exchange valves can be carried out through identical rotation of the pump plungers , or { TAIL ~ identical axial displacement } of the spool valves of all the control devices
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