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通常所说的喷油压力是指喷油器开始喷油时的压力,即喷油器针阀的开启压力。对多缸柴油机来说,各缸的喷油压力都应保持一定。否则会产生如下不良影响。一、影响喷汕开始时刻。喷油器针阀的开启压力由针阎上部的弹簧控制,可拧动调节螺钉进行调节。每一机型都有规定的压力值(如铁牛—55为125公斤力/厘米~2,东方红—40为175公斤力/厘米~2等)。如果此开启压力低,则喷油时刻将提前;如果开启压力高,则唢油开始时刻将延后。对每种柴油机来说都有一个最佳供油提前角,其目的就是要获得最佳的喷油开始时刻(喷油提前角),以保证燃油在气缸内的着火燃烧进行得适时完善,从而使整个柴油机效率高、作功多。如果各缸喷油压力不一致,即使各缸供油提前角一致,也不能保证各缸喷油提前时间一致。这就意味着各缸开始着火的时刻不一致,某些缸的燃烧过程进行得不理想。不适时。其结果会使柴油机功率下降、油耗上升。
The so-called injection pressure is the pressure when the injector starts to inject, that is, the opening pressure of the injector needle. For multi-cylinder diesel engines, the injection pressure of each cylinder should be kept constant. Otherwise it will have the following adverse effects. First, the impact of Shantou start time. Injector needle valve opening pressure by the needle Yan upper part of the spring control, you can twist the adjustment screw to adjust. Each model has a specified pressure value (such as the iron cattle -55 to 125 kg / cm ~ 2, the East Red-40 to 175 kg / cm ~ 2, etc.). If this opening pressure is low, the fuel injection timing will be advanced; if the cracking pressure is high, the fueling start time will be delayed. For each diesel engine has an optimum fuel advance angle, the purpose is to get the best start of injection (injection advance angle), in order to ensure that the combustion of fuel in the cylinder ignition in a timely manner to improve and thus So that the entire diesel engine high efficiency, more work. If the cylinder pressure is not the same injection, even if the cylinder fuel supply advance angle consistent, it can not guarantee that the cylinder fuel injection time in advance. This means that the moment when the cylinders start to fire is inconsistent, and the combustion of some of the cylinders does not perform well. Not suitable. As a result, diesel engine power will drop and fuel consumption will increase.