Delphi prezinta in cadrul congresului international SIA (Société des Ingénieurs de l’Automobile), ce se desfasoara zilele acestea in Rouen, Franta, un nou tip de injector si un sistem de control al presiunii pentru motoarele diesel. Delphi, unul dintre cei mai mari producatori de injectoare piezo-electrice, a crescut presiunea de operare de la 2000 la 2400 de bari pentru o mai buna atomizare a motorinei in momentul injectiei.
Introdus recent pe Volkswagen Polo Bluemotion, dotat cu motor TDI de 1.2 litri si trei cilindri, noul sistem de injectie permite obtinerea unui consum de numai 3.3 litri la 100 de kilometri parcursi si emisii de 87 de grame CO2 pe kilometru. Delphi prezinta de asemenea un senzor care masoara presiunea din cilindri in timp real si netezeste calea pentru introducerea HCCI (homogeneous charge compression ignition). Sistemul HCCI este asteptat sa apara pe piata in anul 2014-2015.
Comunicatul de presa (in limba engleza)
Delphi Reveals Latest Technical Advances For Clean Diesels at SIA Congress
Range of advanced technologies unveiled in Delphi’s technical paper will simplify compliance with Euro 6 and other demanding standards worldwide
Release Date: May 21, 2010
PARIS – As manufacturers turn to heavily-boosted, downsized-diesel engines to provide high power density with low CO2 emissions, the higher combustion temperatures and pressures involved make the reduction of NOx emissions more challenging. At the upcoming SIA International Congress in Rouen, Delphi Corp. will present new developments in fuel injection equipment and engine control systems that help to substantially reduce overall diesel engine emissions including CO2. The latest technologies will simplify compliance with increasingly demanding emissions standards in Europe, such as Euro 6, and in other markets worldwide where high-efficiency diesel engines are increasingly recognized as an effective solution for CO2 reduction.
The paper, to be presented on Wednesday May 26 as part of the ‘Innovative Injection Systems’ session, will discuss enhancements to Delphi’s balanced-valve servo-solenoid system and advanced direct-acting piezo system. The upgrades include an increase in maximum operating pressure from 2000 bar up to 2400 bar with improved high-pressure atomization, enhancements to Delphi’s closed-loop control system, improved hydraulic efficiency, and reduced engine starting time to provide seamless stop-start.
At the SIA Congress in Rouen, Delphi’s general manager diesel engine management systems, John Fuerst, will suggest that the key to affordable low emissions remains the fuel injection equipment and the engine management system.
The latest evolution of Delphi’s solenoid injector and next generation Delphi pump help the new Volkswagen Polo reach a world leading CO2 emissions rating of just 87g/km.
John Fuerst, Delphi’s general manager diesel engine management systems, will also participate as a panelist during the SIA proceedings.
„To meet Euro 6 and other highly demanding standards worldwide, future light-duty diesel engines must produce much lower levels of NOx particulates, CO and hydrocarbon emissions,” Fuerst said. „It is important to address these standards at competitive cost levels while continuing to reduce CO2 output and without affecting current levels of performance and refinement. Delphi believes that a key to affordable low emissions remains the fuel injection equipment and the engine management system because by optimizing these technologies, the cost, weight and complexity can be significantly reduced.”
Performance upgrades for common rail systems
As one of the largest suppliers of advanced diesel technologies for all sizes of vehicle, Delphi has achieved several ‘industry firsts’ including twin valve Electronic Unit Injectors for heavy duty applications and, more recently, direct acting piezo injectors for light-duty applications. At the Rouen congress, Delphi experts will detail how a combination of performance upgrades to proven hardware, combined with an innovative combustion control system, will allow significant improvements in emissions and fuel economy together with greatly reduced combustion noise.
Delphi offers two families of common rail diesel injection system. The Multec™ system with balanced-valve fast servo-solenoid injectors offers equivalent performance to servo-piezo systems but at a much reduced cost. This latest system is featured on the new 1.2 liter Volkswagen Polo BlueMotion, which delivers 3.3l/100km (71mpg) with CO2 emissions of just 87g/km. The common rail system on the new Polo, the 2010 World Car of the Year, includes the latest evolution of Delphi’s servo-solenoid common rail system with the company’s next generation DFP6 fuel pump. Delphi worked closely with Volkswagen to generate this world-leading performance.
For larger and very high-performance engines, Delphi’s direct-acting piezo injector delivers unprecedented control of the rate and shape of injection events, independent of rail pressure. This allows substantially reduced smoke emissions and therefore the use of increased EGR for affordable NOx reduction, while the elimination of fuel backflow allows significant system simplification.
Landmark development in engine control
A significant development that will allow further reductions in CO2 and other tailpipe emissions is a new technique for direct combustion parameter control, based on real-time in-cylinder pressure measurement. This innovative approach to complete engine control will help enable the introduction of advanced low-emissions combustion strategies such as homogeneous charge compression ignition (HCCI), low temperature combustion (LTC) and pre-mixed charge compression ignition (PCCI). The performance of this new approach will also be addressed in Delphi’s technical paper.
„Our combination of hardware development and innovative new control strategies will help diesel engines maintain their position as outstanding solutions for low CO2 vehicles,” said Fuerst. „Delphi technologies are well-suited to address Euro 6 and other forthcoming standards, as vehicle producers seek to deliver exceptionally clean vehicles in every class.”
Delphi is a leading global supplier of electronics and technologies for automotive, commercial vehicle and other market segments. Operating major technical centers, manufacturing sites and customer support facilities in 30 countries, Delphi delivers real-world innovations that make products smarter and safer as well as more powerful and efficient. Connect to innovation at http://www.delphi.com.
Delphi paper at the SIA Diesel Congress in Rouen – France on 26th – 27th May 2010:
„Light Duty Common Rail Injection Technology for High Efficiency Clean Diesel Engines”
Authors: Noureddine Guerrassi, Philippe Bercher, Derk Geurts, Guillaume Meissonnier & Nebojsa Milovanovic