ERIKC jet spray common rail injection diesel nozzle DLLA156P1368 automatic fuel injector nozzle DLLA 156P 1368

FAQ: What are the common problems with fuel injectors? Injector return pipe damaged

ERIKC Answer: When the needle valve wear is serious or the needle valve body is not tight enough with the injector housing, the oil return of the injector increases significantly, and some can reach 0.1 to 0.3 kg/h. If the return pipe is damaged or missing, the return oil will be wasted, causing waste. Therefore, the return pipe must be intact and sealed so that the return oil can smoothly flow into the tank. If the return pipe is connected to a diesel filter, a one-way valve shall be provided at the terminal to prevent diesel oil in the filter from flowing back into the injector.

FAQ: What are the common problems with fuel injectors? Needle valve orifice enlargement

ERIKC Answer: As the high-pressure oil jet continues to be flushed, the needle valve orifice will gradually wear out, causing the injection pressure to drop, the injection distance to be shortened, the poor atomization of diesel oil, and the increase of carbon deposit in the cylinder.

Solution: The hole diameter of a single-hole pin injector is generally larger than 1 mm. A steel ball with a diameter of 4 to 5 mm can be placed at the hole end, and tapped with a hammer to make plastic deformation of the injection hole. Aperture. Due to the large number of holes and small aperture, the multi-hole direct injection injector can only be tapped on the end of the hole with high-speed steel grinding. If it fails to pass the adjustment, the needle valve coupler should be replaced. .