K Series PT Injector
For Cummins K19, K38, K50 series diesel engine.
PT injector converts the low-pressure fuel supplied by the PT fuel pump into a high-pressure (about 70-138 MPa) fuel injection into the combustion chamber. The series of injectors includes two types, basic type and STC type. The basictype is a PTD type cylindrical injector (see figure right), and the plunger stroke of which needs to be adjusted on the engine. The plunger stroke of STC type injector (see figure left) need to be adjusted both on injector and engine.
This type of fuel injector adopts “injection advance timing method” (fuel to be injected in the compression cycle as earlier as possible) under starting and light load conditions, which improves the idle speed characteristics in cold weather, reduces smoke emitted by engine in cold weather, and improves the fuel economy under light load conditions. It adopts normal timing method" (fuel to be injected normally in the compression cycle) under the medium and heavy load conditions, which controls the maximum burst pressure of the cylinder and reduces the emission of NOx (nitrogen oxides).
Injection quantity: 140-366 mm3/stroke
Injection quantity: 214-286 mm3/stroke