What is the pressure of the diesel injector sealing test

Different combustion chamber forms, different injector nozzle models, different injection pressure.

Swirl chamber combustion mode with the nozzle is a single hole shaft needle type, injection pressure of 12 ~ 15MPa. (Previously, there is a pre-combustion chamber type combustion chamber) swirl chamber (or pre-combustion chamber) in the cylinder head. Their advantage is that the fuel quality requirements are not high, soft combustion, nozzle coupling manufacturing simple. The disadvantage is that the combustion chamber is more complex, heat loss, heat utilization is low.

Direct injection combustion chamber consists of cylinder head and piston top, the injector nozzle is multi-hole closed type, injection pressure is 17.5~240MPa or higher. Advantages are simple combustion chamber, small heat loss, high thermal efficiency. Disadvantages are rough combustion (the design of the porous is also to make up for the combustion chamber is simple, to reduce the phenomenon of rough combustion), the nozzle coupling manufacturing process is complex.

Electrically controlled high-pressure **** rail nozzle pressure is generally 160~200MPa.

Injector nozzles in the natural norm can be accepted in the test pressure is much higher than the pressure at work.

Injector nozzles are generally made of high-speed steel, which is resistant to high temperature and high pressure, with good stability and small deformation.