The new dual-charged FSI petrol engine by Volkswagen

Krebs, Rudolf; Szengel, Rüdiger; Middendorf, Hermann; Sperling, Helmut; Siebert, W.; Theobald, Jörg; Michels, Karsten

doi:10.1007/bf03227810

Cited by 13 publications

(9 citation statements)

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“…Furthermore, combined super-and turbocharging systems have also been in production for some time, allowing positive pressure to be applied to the intake all the time and desensitizing the engine to the pulse overlap effects (particularly an issue in four or more cylinder groups) [10]. Other interesting downsizing approaches such as Divided Exhaust Period or Valve-Event Modulated Boost hold promise in improving the efficiency of the Otto cycle through pumping work reduction, scavenging and related combustion improvement [11,12,13].…”

Section: Commercial Viewmentioning

confidence: 99%

“…One early successful downsized engine with a DF of approximately 40% provided a reduction in fuel consumption on the New European Drive Cycle of 20% [14] 1 . A single research engine has been shown with a DF of 50% [16].…”

Section: Commercial Viewmentioning

confidence: 99%

“…This system has certain similarities to that employed on the Volkswagen Group's 'Twincharger' engines [10,14], except that for the Ultraboost engine the configuration was fundamentally different insofar as the turbocharger was the first stage in the charge air path. This configuration was chosen for several reasons, including the ability to interpose an intercooler between the charging stages in addition to another within the plenum.…”

Section: Major Additional Technologies Employed On the Ub200 Enginementioning

confidence: 99%

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Ultra Boost for Economy: Extending the Limits of Extreme Engine Downsizing

Turner

Popplewell

Patel

et al. 2014

SAE Int. J. Engines

147

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The paper discusses the concept, design and final results from the 'Ultra Boost for Economy' collaborative project, which was part-funded by the Technology Strategy Board, the UK's innovation agency. The project comprised industry-and academiawide expertise to demonstrate that it is possible to reduce engine capacity by 60% and still achieve the torque curve of a modern, large-capacity naturally-aspirated engine, while encompassing the attributes necessary to employ such a concept in premium vehicles.In addition to achieving the torque curve of the Jaguar Land Rover naturally-aspirated 5.0 litre V8 engine (which included generating 25 bar BMEP at 1000 rpm), the main project target was to show that such a downsized engine could, in itself, provide a major proportion of a route towards a 35% reduction in vehicle tailpipe CO 2 on the New European Drive Cycle, together with some vehicle-based modifications and the assumption of stop-start technology being used instead of hybridization. In order to do this vehicle modelling was employed to set part-load operating points representative of a target vehicle and to provide weighting factors for those points. The engine was sized by using the fuel consumption improvement targets and a series of specification steps designed to ensure that the required full-load performance and driveability could be achieved.The engine was designed in parallel with 1-D modelling which helped to combine the various technology packages of the project, including the specification of an advanced charging system and the provision of the necessary variability in the valvetrain system. An advanced intake port was designed in order to ensure the necessary flow rate and the charge motion to provide fuel mixing and help suppress knock, and was subjected to a full transient CFD analysis. A new engine management system was provided which necessarily had to be capable of controlling many functions, including a supercharger engagement clutch and full bypass system, direct injection system, port-fuel injection system, separately-switchable cam profiles for the intake and exhaust valves and wide-range fast-acting camshaft phasing devices.

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Section: Commercial Viewmentioning

confidence: 99%

Section: Commercial Viewmentioning

confidence: 99%

Section: Major Additional Technologies Employed On the Ub200 Enginementioning

confidence: 99%

See 1 more Smart Citation

Ultra Boost for Economy: Extending the Limits of Extreme Engine Downsizing

Turner

Popplewell

Patel

et al. 2014

SAE Int. J. Engines

147

View full text Add to dashboard Cite

show abstract

“…The subject of the study in this article was the gasoline direct injection (GDI) system. In the literature, other designations can be observed that are used, for example, by the Volkswagen Group -FSI [17,5,6] (fuel stratified injection) or TFSI [4,19] (turbocharged fuel stratified injection). At this point, it should be emphasized that the GDI technology has been described in both Polish and foreign subject literature [4].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of the diagnosing process of high-pressure fuel pumps on the example of a spark-ignition engine

Śliż

2020

Diagnostyka

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The basic objective of the article was to identify inference algorithms (rules) in the diagnosis process of high pressure pumps (HP) on the example of gasoline engine units, designated as EP (THP). For the needs of the main objective, a partial goal was assigned. It was to characterize the symptoms and diagnostic codes indicating the malfunction of the high pressure pump. As a result of empirical proceedings, the results of the analysis of completed repairs of the high pressure fuel system were presented, then, based on the technical documentation and observation of the course of diagnostic activities in workshop conditions, the HP pump diagnostic process was recreated on the example of the tested EP unit. In addition, as a result of the study, factors shaping the correct implementation of the HP pump diagnosis process were identified. This study may be an incentive for a more in-depth analysis of the methodology for diagnosing low and high pressure fuel circuits in spark-ignition engines.

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“…From these results, various light duty downsized engines were equipped with the hybrid system. Relevant examples are the 1.4l TSI gasoline engine launched in 2005 by Volkswagen [203,204], and the 1l 3-cylinder aggressive downsized Diesel engine presented by Howlett et al [161] which could reach the same performance as a conventional 1.5l 4-cylinder turbocharged engine. Different studies comparing the performance of the hybrid system and the single stage turbocharger on the same base engine were carried out [175,192,221,233].…”

Section: Mechanical Auxiliary Superchargingmentioning

confidence: 99%

Trends and Limits of Two-Stage Boosting Systems for Automotive Diesel Engines

Varnier¹,

Olivier²

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Internal combustion engines developments are driven by emissions reduction and energetic efficiency increase. To reach the next standards, downsized/downspeeded engines are required to reduce fuel consumption and CO2 emissions. These techniques place an important demand on the charging system and force the introduction of multistage boosting architectures. With many possible arrangements and a large number of parameters to optimize, these architectures present a higher complexity than current systems. The objective of this thesis has thus been to investigate the potential of two-stage boosting architectures to establish, for the particular case of passenger car downsized/downspeeded Diesel engines, the most efficient solutions for achieving the forthcoming CO2 emissions targets.To respond to this objective, an exhaustive literature review of all existing solutions has first been performed to determinate the most promising twostage boosting architectures. Then, a new matching methodology has been defined to optimize the architectures with, on the one hand the development of a new turbine characteristic maps representation allowing straight forward matching calculations and, on the other hand, the development of a complete 0D engine model able to predict, within a reduced computational time, the behavior of any boosting architecture in both steady state and transient operating conditions. Finally, a large parametric study has been carried out to analyze and compare the different architectures on the same base engines, to characterize the impacts of thermo-mechanical limits and turbocharger size on engine performance, and to quantify for different engine development options their potential improvements in terms of fuel consumption, maximum power and fun to drive.As main contributions, the thesis provides new modeling tools for efficient matching calculations and synthesizes the main trends in advanced boosting systems to guide future passenger car Diesel engine development. ResumenLos desarrollos actuales en el campo de los motores de combustión interna alternativos están principalmente motivados por la reducción de las emisiones contaminantes y el aumento de la eficiencia energética. Cumplir con los nuevos estándares para automoción requiere una reducción en el consumo de combustible y en las emisiones de contaminantes, y para ello resulta imprescindible el uso de motores downsized and downspeeded. El empleo de dichas técnicas impone unos requisitos de exigencia elevados al sistema de renovación de la carga y obligan a la introducción de arquitecturas de sobrealimentación multi-etapa. Debido a la gran variedad de configuraciones posibles y al elevado número de parámetros a optimizar, esas arquitecturas presentan una mayor complejidad que los sistemas actuales. Por tanto, el objetivo principal de esta tesis ha sido investigar el potencial de las arquitecturas de sobrealimentación de doble etapa para establecer, en el caso particular de los motores downsized and downspeeded, las soluciones más eficientes qu...

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The new dual-charged FSI petrol engine by Volkswagen

Cited by 13 publications

References 1 publication

Ultra Boost for Economy: Extending the Limits of Extreme Engine Downsizing

Ultra Boost for Economy: Extending the Limits of Extreme Engine Downsizing

Characteristics of the diagnosing process of high-pressure fuel pumps on the example of a spark-ignition engine

Trends and Limits of Two-Stage Boosting Systems for Automotive Diesel Engines

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