Fuel injector nozzle is actually a simple solenoid valve , when the electromagnetic coil is energized, produce suction , needle being sucked on, open the orifice , fuel through the annular gap between the shaft of the needle and the needle orifice head of the high-speed spray to form a mist , which will help burn fully . Nozzle is widely used in many fields , but the course will be a variety of stuck.
The following outlines the main stuck reason of fuel injector nozzle :
1, Diesel dirty , there are impurities in the high-pressure tubing, needle Couples closed so lax anti- combustion chamber pressure gas channeling , burned needle Couples .
2, Machine cooling bad injector temperature is too high , causing the oil valve parts stuck. The oil too late , too much cooling water scale or blockage , pump impeller face wear , the engine will make a long-term overload , such as engine overheating .
3, The oil valve wear, drip injector fuel injection occurs when stopped , to cause the fuel injector coking coke , stuck fault occurs .
4, When the injector is installed , install the gasket or gasket leak damage , causing leak , causing localized overheating and injector stuck .
5, The injection pressure is too low , causing the combustion chamber pressure gas anti- channeling ;
6, Because the manufacture of parts , such as the cylinder head and the injector mounting hole with tight injector needle valve body and the cylinder head mounting hole gap is too small, the fuel injector mounting hole of the cylinder head machined depth etc.
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