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Working Principle Of Diesel Injector Nozzle:

The Diesel Injector nozzle needle valve is closed and held by the spring before the pump begins to supply the oil. Began its oil pump stroke fuel injection pump, high pressure diesel through into the tubing connector into the Diesel Injector nozzle assembly, after a Diesel Injector nozzle body oil duct into the needle valve pressure cone cavity around the oil, when diesel pressure to set pressure, oil pressure effect on the needle valve pressure cone upward thrust will make needle valve opening, diesel from under the needle valve called the oil sac, a small oil cavity reach the Diesel Injector nozzle, and from the oil mist jet Diesel Injector nozzle to finely. When the pump oil pressure drops, the needle valve spring lands the needle valve on the seat, and the injection process ends.

Typical failure of Diesel Injector nozzle and treatment method

Edit routine fuel injection Diesel Injector nozzle test procedure

(1) opening pressure of Diesel Injector nozzle

(2) Diesel Injector nozzle spray form

The noise of the spout vibrates

(4) dripping from Diesel Injector nozzle

(5) diesel oil leakage from fuel injection Diesel Injector nozzle

The following situations generally indicate problems with the Diesel Injector nozzle:

(1) black smoke in diesel exhaust

(2) diesel engine performance variation and power deficiency

(3) difficulty in starting diesel engine

(4) engine idling rough and misfire

(5) diesel fuel consumption increases

(6) diesel engine combustion knock cylinder

(7) diesel engine overheating

Check the surface quality of oil outlet valve coupler and replace any of the following conditions:

(1) the pressure reducing ring has severe wear marks

(2) excessive wear on the cone surface

(3) the conical surface has metal peeling or deep scratch

(4) cone corrosion of oil outlet valve and seat

(5) the oil outlet valve has cracks

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