The New Delphi Injector Family – Architecture and Performance
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Car manufacturers around the world are facing the significant market challenges of meeting strict governmental emissions regulations and fuel economy standards while delivering the performance that consumers demand. Building on the successes already achieved and the extensive experience in the global market, Delphi continues to develop next-generation technologies to meet these demands, including a new family of injectors, fuel pumps, Engine Control Units (ECU) and rails for light- and medium-duty applications to better fit customer requirements.
This new family of fuel injection equipment (FIE) offers improved performance through increased multiple injection optimization, leakage reduction and injection pressure increase up to 2,500 bar, translating into better injection control and better combustion, thus reducing fuel consumption, CO2 and other emissions.
This paper focuses on new Diesel injectors. It describes briefly the approach Delphi utilized to develop this family composed of three injectors (DFI1.20, DFI1.22 and DFI4.25) and outlines the innovative features included in it. The modular approach of the new Delphi injector family is also shown in a ‘strength-diagram’, where cost and technical performance are rated. A more complete analysis is done on capability offered by the DFI4 injector in terms of combustion strategy. The new performances of the DFI4 allow the utilization of new combustion modes linked to rate shaping due to its very good injection control and stability.
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