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: common-rail injector II air-flow sensor with fuel distributor K-Jetronic solenoid valve of a radial-piston distributor pump distributor pump (adjusting the injection timing advance)