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: Audi cylinder head with 5 valves two-stage twin-choke downdraught carburetor 4A1 air-mass sensor with hot film distributor-type fuel-injection pump with electronic governor