nozzle holder with two-spring injection nozzle and needle-displacement sensor function of the nozzle holder, nozzle, nozzle needle, pressure pin and pressure spring. function of the inlet and outlet ducts. Detection of start of injection by a coil. description ordernumber 1176 see also: exhaust gas recirculation valve II twin-choke downdraught carburetor feed pump, diesel (single-acting) valve timing model case