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New system combines the flexibility of
common rail with world-leading 3,000 bar pressure |
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annover, Germany Delphi Corp. (PINKSHEETS: DPHIQ) is launching its first common rail system for high durability medium and heavy duty applications. Combining the flexibility of rail-based fuel management with the world-leading ultra high pressures that Delphi achieves with its proven Electronic Unit Injection (EUI) technology, the new remote pump and distributed pump common rail systems provide a highly effective and affordable path through Euro VI, post US10, post Japan PNLTR and beyond.
“This is a revolutionary system that will take new and existing engines beyond even the next generation of challenging emissions standards,” claims Delphi Diesel Heavy Duty general manager David Friday.
The new system is available with a conventional common rail architecture, in which fuel pressure is provided by an engine oil-lubricated remote cam-and-plunger pump developed by Delphi from its proven medium duty common rail technology, and in two distributed pump architectures.
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| The first of the distributed pump architectures, known as F2 P, is ideal for cam-in-block engines that would traditionally have used an EUP architecture. The same layout and dimensions can be retained, with two or three cam-driven pumps, depending on engine rating, and dedicated injectors using new high-precision outlet metering valve technology. The second of the distributed pump architectures, known simply as F2, is ideal for cam-in-head engines that would traditionally |
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have used EUI architecture. Again these can retain their existing layout and dimensions, using two or three cam-driven combination pump/injector units. These highly sophisticated devices use a patented miniaturized valve to close the path to the nozzle when pressure is being directed to the rail. When fuel is required at the nozzle, the pumping element is isolated and fuel is directed from the rail to the outlet metering valve.
To help release the performance of its new system, Delphi is also launching a new Electronic Truck Controller and a new control software package. As well as providing powerful combustion control, the system is designed to integrate related vehicle functions such as cruise control.
Long-term reliability
The new common rail system is designed for durability in excess of 1.5 million kilometers. To ensure high precision throughout its life, Delphi has spent almost five years refining the technology at its Park Royal technical centre in London, UK. Much of the knowledge used builds on experience with its highly regarded twin valve E3 EUI, which operates at a currently world-leading 2,500 bar.
Delphi has manufactured several million EUI and EUP injectors, giving it more experience in ultra high pressure systems than any other supplier. These systems are specified by many of the major manufacturers of heavy duty engines in Europe and North America and by an increasing number in developing markets.
Both the remote and distributed pump common rail systems will be available with specifications optimized for medium duty (4-9 liter engines) or heavy duty (9-16 liter) applications, delivering 2,400 bar, 2,700 bar or 3,000 bar. The medium duty system can be specified with 'slimline' 21mm injectors / combination injectors. Delphi is already working on common rail development programmes with a number of European commercial vehicle manufacturers and anticipates start of production around 2012, prior to introduction of the next generation of emissions standards around 2013.
Delphi is one of the world's largest suppliers of diesel fuel injection systems, with a comprehensive portfolio that includes common rail systems for light, medium and heavy duty applications, electronic unit injectors and electronic unit pumps for heavy duty applications, and a wide range of complementary electronics, fuel handling and control systems technologies. |
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