hydraulic cold-start injection advane KSB Model of the whole system: actuating pressure control valve and pressure holding valve when the pressure decreases, the injection-timing piston is moved turning the roller ring into advance direction description ordernumber 314 see also: injection-nozzle holder with hole-type nozzle and pintle-type nozzle air flow adjustment by adequate shape of the air funnel pump element of an in-line injection pump two-spring injection-nozzle with needle-displacement sensor