Why are there so many problems with common rail?
Why are there so many problems with common rail?
Many of these problems, however, stem from things unrelated to the design of a common rail system, which common rail owners should be aware if they want to minimize expensive repairs.
How is the pressure in the common rail controlled?
Common Rail Injection System Pressure Control. Abstract: There are several approaches to control the pressure in the common rail. One early approach method was to supply more fuel than is needed to the common rail and use a pressure control valve to spill the excess fuel back to the fuel tank.
Can a low fuel rail pressure cause a Mil?
Low rail pressure may or may not cause an MIL (check engine light). This is a very common problem that we hear about from our Duramax customers. Actual fuel rail pressure is not keeping up with desired fuel rail pressure.
Why does the common rail injection system have a delay?
One important reason for this is that the system now includes a delay introduced by the high pressure pump. Metering the pump’s inlet flow will have the longest delay since the system delay includes the pump’s induction and discharge strokes; as a result, relatively higher rail pressure fluctuations can be generated [ Bosch 2007].
Many of these problems, however, stem from things unrelated to the design of a common rail system, which common rail owners should be aware if they want to minimize expensive repairs.
How often does a common rail diesel injector fire?
Also, modern common-rail diesel injectors can fire two or three times per engine cycle, doubling the wear on the injector compared to diesels of the past—hence the need for more conscientious maintenance.
How does the Scheid common rail test cell work?
Scheid’s test cell evaluates the flow accuracy of a CP3 pump and common rail injectors. It evaluates the pump’s rpm and has a common rail attached with sensors, so the pulse width can be adjusted to three or four fuel set points. Before getting into those details, we should first clarify how a common rail differs from other types of fuel injection.
