what is a common rail
DESCRIPTION
The common rail is one of the most important components of the direct fuel injection system diesel and gasoline. Eventual common rail failure is always critical since the entire vehicle can be blocked or even set on fire. Therefore the manufacturing of a high-quality common rail is essential.TRANSCRIPT
1
What Is a Common Rail?
2
The common rail is the most essential
component of the direct fuel injection system:
diesel or gasoline.
Its role is to accumulate highly pressurized fuel
and distribute it to the injectors.
3
Why is a Common Rail Critical for Your Car?
Because a common rail failure can block the entire vehicle or set it on fire.
Therefore:
A common rail should possess best mechanical properties.
4
How to Manufacture a Best-Quality Common Rail?
Design
Raw Material Selection
Manufacturing Process
Final Parameters
5
DESIGN
1. The next-generation gasoline and diesel engines tend to become
smaller and lighter. The common rail shape should conform to the new
engine requirements and support high pressure.
2. Size and weight have been minimized, therefore material and design
optimized.
3. Geometry mistakes can easily lead to damage. The precise
parameters should be defined in the design phase and strictly followed
during the manufacturing process.
6
RAW MATERIAL SELECTION
The steels of which common rail are manufactured should
possess the following mechanical properties:
1. Excellent Internal Pressure Fatigue Resisting Property
2. Vibration Fatigue Resisting Property
3. Cavitation Resisting Property
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MANUFACTURING PROCESSForging with high-quality dies and tools is the best way to
manufacture common rails:
1. When forged, the common rail consists only of one piece
which eliminates the risk for cracks and leakages.
2. Forging strengthens the material by closing empty spaces
within the metal
3. Only hot forged steel offers resistance and reliability that go
hand in hand with the reduction of emission of gas and
particles.
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FINAL PARAMETERS
1. Cooling
The right cooling contributes to optimized strength and resistance
of the component, providing best mechanical properties.
2. Trimming
Trimming is a precise operation which ensures the final
parameters and should be done with special attention.
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