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Benefits
Typical Applications
Delphi Multec GDi Multi-Hole Fuel Injectors can be applied to any size gasoline engine, from small displacement turbo-charged engines to large displacement engines, including central mount applications. The small particles in the spray allow optimum charge distribution for reduced emissions on cold start and for future combustion processes such as gasoline homogeneous charge compression ignition (HCCI).
Performance Advantages
Delphi Multec GDi Multi-Hole Fuel Injectors offer flexible spray preparation options that allow customization of the spray shape to accommodate a wide variety of combustion chamber shapes. The small particle size provides rapid vaporization for good mixture preparation. An optimized magnetic circuit provides rapid and consistent response times and increased linear flow while using industry standard drive. The injector tip is designed for fuel deposit robustness (reference SAE 2009-01-1495: Engine Test for Accelerated Fuel Deposit Formation on Injectors Used in Gasoline Direct Injection Engines). Multec GDi Multi-Hole Fuel Injectors are also designed to reduce acoustic noise.
Availability
Delphi Multec GDi Multi-Hole Fuel Injectors will be available to automotive customers starting in the 2010 calendar year. Contact Delphi for further information.
The Delphi Multec® GDi Multi-Hole Fuel Injector tip is designed for fuel deposit robustness.
Targeted Performance Specifications
| Multec 10 Injector |
Multec 12 Injector | |
| Static flow rate |
Up to 20 g/sec |
Up to 20 g/sec |
| Closing response time |
0.4 msec |
0.4 msec |
| Opening response time |
0.4 msec |
0.4 msec |
| Fuel pressure |
30 to 230 bar | 30 to 260 bar |
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Minimum linear flow (at 12.5 g/sec static flow rate) |
3.0 mg/pulse | 3.0 mg/pulse |
| D32 sauter mean diameter (SMD) |
12 µm (at 100 bar) | 7 µm (at 200 bar) |
| DV90 |
25 µm (at 100 bar) |
16 µm (at 200 bar) |
| 0 after inject (no bounce) | No bounce at close |
No bounce at close |
| Cone angle as required by combustion | 40° to 90° | 40° to 90° |
The Delphi Advantage
Delphi has produced hundreds of millions of gasoline fuel injectors over the years for customers around the world. That vast experience has led to product and manufacturing process improvements which have helped eliminate contamination-related failures and provided other quality and cost advantages. Delphi's in-depth knowledge of systems and the combustion process help optimize injector performance.
As a global leader in engine management systems technology, Delphi can help manufacturers meet emissions requirements, improve fuel economy and enhance performance. Delphi is a source for high value solutions and our systems approach is built into every product. Delphi&'s flexible engineering approach encourages collaboration. And, Delphi has a thorough understanding of automotive markets around the world and a global network of resources.