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Potential for Emission Reduction and Fuel Economy with Micro & Mild HEV

AVL List GmbH-Franz Murr, Ernst Winklhofer, Michael Weissbaeck, Gerald Teuschl
  • Technical Paper
  • 2019-28-2504
Published 2019-11-21 by SAE International in United States
The development of modern combustion engines (spark ignition as well as compression ignition) for vehicles compliant with future oriented emission legislation (BS6, Euro VI, China 6) has introduced several technologies for improvement of both fuel efficiency as well as low emissions combustion strategies. Some of these technologies as there are high pressure multiple injection systems or sophisticated exhaust gas after treatment system imply substantial increase in test and calibration time as well as equipment cost.With the introduction of 48V systems for hybridization a cost- efficient enhancement and, partially, an even attractive alternative is now available. An overview will be given on current technologies as well as on implemented test procedures. The focus will be on solutions which have potential for the Indian market, i.e. solutions which can be implemented with moderate application effort for currently available compact and medium size cars. The possibilities of 48V technologies for fuel economy and emission reduction will be discussed. Simultaneously, tools for testing and calibration at power train testbed as well as for on-road application will be presented.Furthermore, it…
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A Diesel Efficiency-Engine~Cost-Effective Approach for Future Diesel Power Train

AVL Japan K. K.-Masashi Uchiyama
AVL List GmbH-Michael Weissbaeck, Michael Howlett
  • Technical Paper
  • 2012-08-0342
Published 2012-05-23 by Society of Automotive Engineers of Japan in Japan
Reduction of fuel consumption and costs dominate the future market requirements in drive train development. An efficiency-engine concept is an approach by reducing specific power density. Compared to downsizing concept, this is cost-effective approach good for world-wide application and electrification. Required peak firing pressure can be similar to those of turbocharged gasoline engines. This enables significant friction reduction of crank train and increases part commonality with gasoline engines. Achievable CO2 reduction is similar to a swept volume reduction by 20 to 25%. The paper discuss about such an efficiency engine concept in comparison to a typical downsizing concept.
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Emission Solutions for Future Diesel SUVs

AVL Japan-Masashi Uchiyama
AVL List GmbH-Michael Weissbaeck, Ludwig Buergler, Holger Herrmuth, Peter Herzog
  • Technical Paper
  • 2007-08-0335
Published 2007-05-23 by Society of Automotive Engineers of Japan in Japan
In this paper the AVL's approach to cope with future emission legislations for HSDI diesel SUV is discussed, based on multi-cylinder engine results with different technology packages applied. Following the technology assessment, the individual potential of each package to achieve legislative targets in US and EU is deduced. In addition, development scenarios for US and EU are discussed and the possibility of communizing technologies in the two markets evaluated. The evaluation is carried out with the intention of identifying base technologies which can be applied worldwide, thus reducing development costs and achieving low unit costs through high production economies-of-scale.
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The Diesel SUV - Pushing Back Emission Frontiers

AVL LIST GmbH, Graz, Austria-Peter L. Herzog, Michael Weissbaeck, Holger Herrmuth, Martin Schüssler
Published 2007-01-17 by The Automotive Research Association of India in India
The current figure of Diesel market share in Europe of about 50% indicates a high market penetration of the HSDI Diesel engine. Due to increasing fuel prices and limited crude oil resources the worldwide demand for Diesel engines for the passenger car sector is increasing - even in typical gasoline markets like the united States. The key factors for the further success of the HSDI Diesel engine are the fulfillment of future worldwide emission legislation and that the production costs of the technologies necessary to do so, do not make it uncompetitive in comparison to the various gasoline engine concepts. Heavy SUVs with relatively small engines will therefore have to face the biggest challenge. For the EU5 proposal currently under discussion, such vehicles will have to be certified as passenger cars (vehicle category M) and are no longer allowed to use the LCV standards (Light Commercial Vehicles, vehicle category N1 - Class III), which means a NOx reduction of 50% in the European Driving Cycle (EDC) will be necessary. In the USA, the FTP75 driving…
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TIER II Emission Reduction Strategies for US HSDI Diesels

AVL Japan-Masashi Uchiyama
AVL List GmbH-Peter Herzog, Michael Weissbaeck
  • Technical Paper
  • 2005-08-0111
Published 2005-05-18 by Society of Automotive Engineers of Japan in Japan
The HSDI diesel engine now commands about 50% market penetration for newly sold passenger vehicles in Europe. However, the use of the engines in the US is currently extremely limited. One of the major obstacles to the introduction of these highly efficient engines has been the concern over meeting future TIER 2 emissions levels. As the market introduction of particulate filter is a given, this paper focuses on NOx reduction technologies which are under development today. Improvements on charge systems, EGR systems and fuel injection systems are described and test results are presented which address both the light load conditions during FTP cycle as well as the higher load phases during US 06 cycle. These approaches enable significant NOx reductions. In addition to the internal engine measures NOx aftertreatment systems are discussed in this paper.
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Development of Closed-Loop Combustion Control~A Necessity for Alternative Diesel Combustion Systems?

Masashi Uchiyama
AVL List GmbH-Klemens Neunteufl, Eduard M. Unger, Thomas Kammerdiener, Michael Weissbaeck
  • Technical Paper
  • 2004-08-0319
Published 2004-05-19 by Society of Automotive Engineers of Japan in Japan
With today's flexibility on diesel engines the start of combustion is not only controlled by the fuel injection timing. Charge condition parameters have significant effects on the combustion and thus on engine out emissions. As a consequence the successful application of lowest emission diesel combustion strategies must always be seen in close connection with the required engine control strategy. Applying some kind of closed-loop combustion control reduces the dispersion when shooting for lowest emissions and also enables future combustion strategies. The development process of such a closed-loop combustion-guided control strategy is described, applying a rapid prototyping engine management system (AVL-RPEM™) and online cylinder pressure signal evaluation.