Monojetronic Function of speed regulator, central injection valve, throttle blade, throttle-blade actuator with control motor and potentiometer. description ordernumber 1022 see also: nozzle holder with two-spring injection nozzle and needle-displacement sensor vane-type camshaft adjuster pump tappet of an in-line pump VP 44 (Bosch) radial-piston distributor-type injection pump