3 injector needle-and the inspection

3.1 auscultation law
Injection Tsui normal working hours, and the sound is uniform and continuous "pyridazine, pyridazine" sound, injection pressure is too low, given the continuous and uniform, "Chi, Chi" sound, and with smoke. Needle card issuers, voice intermittently, with no fixed rhythm. Diyou nozzle when, there will be very close between the two sounds, exhaust release foam.
3.2 does not check the demolition
(1) Fuel Injector removed from the cylinder, high-pressure pipeline to the field to good installation, will be placed in the accelerator throttle position. Decompression to put single-cylinder diesel engine crankshaft, multi-cylinder engine hand pump pumping, such as fuel injection simply neat, good atomization, no Diyou phenomenon, the injector technology is good, or else the oil should be replaced first.
(2) to put decompression crankshaft, such as the emission of diesel into line with this note Tsui injector fuel injection or face serious permeability have Diyou phenomenon must be replaced with new pieces.
(3) Act feeling
Engine operation, the cylinder by hand touch, if not pulsating feel that the tank is faulty, even if parts of the plunger and the oil valve-and technology is good, then the cylinder fuel injection Tsui card death, to be replaced Dual pieces.