出油阀偶件简称出油阀,普通(等容)出油阀如图1所示,图1c中的h为减压行程。为了使出油阀不仅起单向阀和减压阀的作用(在柱塞回程时阻止燃油从高压油管和喷油嘴流回喷油泵,有利于排除系统中的空气,保持高压系统内的残余压力, Outlet valve referred to as the oil valve, ordinary (isometric) out of the oil valve shown in Figure 1, h in Figure 1c for the decompression stroke. In order for the delivery valve to function not only as a one-way valve and as a pressure relief valve (to prevent fuel from flowing back from the high-pressure tubing and nozzle to the injection pump during the return stroke of the plunger, it is advantageous to remove air from the system and to keep residuals within the high-pressure system pressure,