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Delphi Technology launched the first 500+Bar gasoline direct injection fuel system in the industry.

2019-05-21 16:48. network Wen Wen

The report has been submitted to the Vienna automotive Seminar on May 16th -17.

The further enhancement of the proven Delphi technology system.

The system is suitable for many applications without additional adjustment of the engine.

Second reports show the latest innovations in using high pressure natural gas to reduce carbon dioxide emissions from heavy vehicles.

China, Shanghai, May 20, 2019 - in a technical report of the Vienna automotive industry seminar, which was held on May 2019 16-17, Delphi Technologies announced the 500+Bar new gasoline direct injection (GDi) fuel system. Compared with the advanced 350 Bar system, the new system can reduce particulate emissions by 50%, without adjusting the engine design at a high cost. Reducing the number of particulate matter (including less than 23 nm particulate matter) will help automakers meet the increasingly stringent emission standards of the world.

Reducing engine emissions can reduce exhaust emissions during the critical period before the catalyst starts to burn, and reduce the dependence on the high cost exhaust aftertreatment system. Regulatory tests (including real driving emission tests) show that the system effectively reduces emissions. At the end of 2016, Delphi technology started the first 350 Bar gasoline direct injection (GDi) fuel system in the industry. Compared with the standard 200 Bar system, it reduced the amount of particulate matter by 70%.

Walter Piock, chief engineer of Delphi technology gasoline system, said: "all along, the industry has realized that the injection pressure to 500+ Bar can significantly reduce engine emissions, while improving carbon dioxide emissions and fuel economy."

The main challenge is how to achieve such high pressure without increasing pump drive load. Most engines use the camshaft to drive the GDI pump. If the traditional method is adopted, it usually requires costly redesign to strengthen the camshaft mechanism.

Piock disclosed: "we have designed an innovative internal sealing system for the GFP3 pump of 500+Bar. In some applications, we have designed a miniaturized plunger diameter to prevent increasing the load of the driving mechanism."

With the new system of Delphi technology, the engine can have 500+Bar injection pressure without changing the cost of most of the components of the existing camshaft transmission system.

Under the dual requirements of improving urban air quality and reducing greenhouse gas emissions, the fuel injection system has become an important part of meeting the future legislative objectives. Delphi technology's 500+Bar system will help automakers cope with these two challenges.

Piock said: "compared to the standard 200 Bar system in the industry, our 350 Bar gasoline direct injection (GDi) fuel system can reduce particulate matter by 70%. Compared with the 350 Bar system, our 500+Bar gasoline direct injection (GDi) fuel system further reduces the particulate matter by up to 50% on this basis.

In order to produce a complete new 500+Bar system, Delphi technology has developed all the system components, including Multec16 ejectors, pumps, forging common rail, and corresponding engine control systems and software. These components further enhance durability and reliability, and meet the existing assembly requirements and interface specifications, so there is no need to make physical changes or minor changes to the existing engines. The 500+Bar system is expected to be put into mass production after 2022.

High pressure natural gas injection for heavy vehicles

The second scientific reports submitted to this seminar are jointly prepared by the West Port Fuel System Company and Delphi technology, and will introduce an innovative West Port high pressure direct injection HPDI 2.0TM system. The advanced system uses high pressure natural gas to reduce the carbon dioxide emissions from heavy fuel vehicles to the wheels of heavy commercial vehicles.

The HPDI 2 system can reduce CO2 emissions by 20%. With renewable natural gas, the system can achieve a nearly 100% reduction effect.

Countries around the world are implementing carbon dioxide reduction strategy. In April 2019, the EU implemented the new regulations, requiring heavy truck manufacturers (OEM) to reduce the carbon dioxide emissions per truck by 15% in 2019 and 30% in 2030 by 2025.

With minimal change, the West Port HPDI 2.0TM system can be installed on heavy duty diesel engines and trucks using existing reliable technologies. The system can reduce carbon dioxide emissions by up to 20%, so the OEM can enable existing trucks to meet EU regulatory requirements by 2029.

The Delphi technology proprietary control valve strategy enables the new dual concentric needle nozzles of West Port to complete a small part of the diesel fuel injection, followed by a larger natural gas injection. The separate diesel igniting spray automatically ignites, thus providing multiple ignition sources distributed throughout the space to ensure consistent natural gas injection ignition. Subsequently, natural gas combustion continued mainly in non premixed manner. Therefore, the engine knock is eliminated and the compression ratio of the basic diesel engine is maintained. Without premixed natural gas, load control can only be achieved by reducing fuel flow, and no partial load throttling is needed.

James Kewley, engineering director of Delphi technology diesel fuel injection system and internal combustion engine components product, said: "the combustion of natural gas in the diesel cycle achieves the same power density and combustion efficiency as traditional diesel engines. Therefore, the potential of reducing carbon dioxide emissions by natural gas can be brought into full play, and there will be no adverse consequences arising from the Otto cycle. This will help OEM cope with increasingly stringent regulatory requirements, especially to alleviate the greater pressure caused by further reducing the carbon dioxide emissions from heavy trucks. "

Vienna automotive Symposium

During the seminar, delegates will also learn more about Delphi technology's latest power propulsion system for traditional power, hybrid and electric light and commercial vehicles. These include supporting the latest technologies of the world's major OEM to promote electrification, and the solutions to the harsh and changeable environment (such as extreme temperature, humidity, salinity, vibration and various fluids) throughout the vehicle life cycle.

About Delphi Technology

Delphi technology focuses on the power system, providing a propulsion solution for electric vehicles and internal combustion engines, helping the world's leading automotive equipment manufacturers meet the challenges of emissions and fuel economy. Delphi technology also provides a leading service solution for the aftermarket. Delphi technology headquarters is located in London, UK. It has technology operation center, production base and customer support service center in 24 countries and regions of the world.

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