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: Demand-driven oil pump with suction stage (V8) diesel particulate filter (soot filter) crankshaft model case in-line injection pump with RQV flyweight governor