![]() ![]() In North America, the challenge is even greater as the Tier II bin5 NO x level, already in place, is equivalent to just 43mg/km compared with 250mg/km for today's Euro 4 and 80mg/km for Euro 6 (although these figures are not absolutely comparable as legislated test cycles in European and the United States are different).Īn additional challenge is the current debate, led by Europe but also in Japan and the United States, on the CO 2 emission reduction to counteract global warming. When Euro 6 is introduced in Europe in 2014, NO x limits will have reduced by a factor of three 1 and particulate matter limits by a factor of five 2 compared with current Euro 4 levels. One of the challenges for diesel engines is to reduce emissions of Nitrogen Oxide (NO x). "To help address the worldwide pressure on fuel prices and the increasing concerns about global warming, our customers are accelerating the introduction of technologies that reduce fuel consumption and cut emissions of all pollutants, including those that are not regulated," said Avila. The resulting improved combustion control provides a considerable reduction in emissions, more torque and power across all engine speeds and significantly improved fuel economy and refinement. This enables the injector to spray fuel into the combustion chamber faster and with much improved spray momentum and accuracy and provides extremely fast opening and closing of the needle valve, independent of injection pressure. In the patented Delphi Direct Acting Common Rail system, the injector needle is set in motion directly by a piezo ceramic actuator, rather than being moved via an electro-hydraulic circuit as with existing fuel injection technologies. "Consumers will be able to drive this system on the roads on a premium vehicle before the end of this year," adds Avila. "I'm very excited and proud today because Delphi is bringing a real product, not a concept, to the market well ahead of competitors," said Jose Avila, general manager of Delphi Diesel Systems. The new system is now entering production and will be available on a European production car to be launched later this year. This launch follows five years of development by Delphi, working closely with its vehicle manufacturer customers to help them address stringent future emissions requirements. (Pinksheets: DPHIQ) is launching the next generation of diesel fuel injectors-the Delphi Direct Acting Common Rail system. The Delphi press release is after the jump.ĭelphi Enters High Volume Production With the World's First Diesel Fuel Injection System to Use Revolutionary Direct Acting Piezo InjectorsĪ new generation of diesel injector technology will help vehicle manufacturers meet tough Euro 6 emissions standards while also improving torque, power, fuel economy, refinement and driveability operations will be liquidated in the near future. It's widely expected that at least Delphi's U.S. After three years under chapter 11 bankruptcy protection in the United States, the chances of reorganizing the company are dimming. Unfortunately, Delphi is in serious trouble. Delphi's injectors are due to launch on a European vehicle this fall. Continental has also announced a direct acting piezo injector that goes into production in 2009. The needle can now respond to commands even more quickly, allowing the timing of the fuel pulses to be smaller, and more accurately timed. The new Delphi DFI3 injector has the piezo ceramic actuator directly moving the needle. The expanding crystal acted on a hydraulic circuit that moved the needle. The first generation of piezo injectors used an indirect servo-hydraulic actuation mechanism. The piezo actuators respond more precisely and repeatably providing more accurate fuel flow control. In piezo injectors, a stack of piezo crystals expand when an electric current is applied. Previous injector designs used electro-magnetic solenoids to move the injector needle and feed fuel to the combustion chambers. One of the keys to helping clean up dieselĮmissions and improving performance in recent years has been the piezo electricįuel injectors developed by companies like Bosch,Ĭontinental and Delphi. On the verge of liquidation, Delphi intros new direct piezo diesel injector ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |