injection nozzle, truck The cutaway models shows a particularly large truck injection nozzle with nozzle holder. Function of the nozzle holder, nozzle, nozzle needle, pressure pin and pressure spring. Function of the inlet and return ducts. description ordernumber 1227 see also: throttle jacking device pump tappet of an in-line pump turbo-charger with variable geometry and electrical control motor visco blower