How often is the nozzle changed?

How often is the nozzle changed? Oil pump nozzle spring manufacturers for you to introduce it:

Spray nozzle is not vulnerable parts, car idle start normal do not clean. Do not change the bad, as long as the regular gas station oil is generally not bad.

Now the fuel injection nozzle used by the car is actually a simple solenoid valve, when the electromagnetic coil is energized, the suction, needle valve is sucked up, open the jet hole, fuel needle valve head shaft needle and jet hole between the annular gap spewing, forming a fog, conducive to combustion fully. The injection nozzles used in diesel engines are mechanically controlled, and the mechanical diesel nozzles work by controlling the precision couple parts (needle valve, needle valve body). The nozzle coupler is one of the three precision couplings of traditional diesel engine, including plunger, plunger sleeve, needle valve, needle valve body, oil valve and oil valve seat. The nozzle of gasoline engine is a part of the electronic control system of gasoline engine. The automobile USES the nozzle mainly has: the diesel fuel nozzle, the gasoline nozzle, the natural gas nozzle and so on, now some foreign manufacturers may manufacture the hydrogen special nozzle.