How Does the Comprex<sup>®</sup> Pressure-Wave Supercharger Work?

Gyarmathy, G.

doi:10.4271/830234

Cited by 47 publications

(24 citation statements)

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“…This approach avoids additional time delays and yields high boost pressures even at low engine speeds. For more information on the basic principles of PWS, see [68]; for a modern application of PWS to realize fuel efficient engines, see [67]; and for the modeling and control of PWS, see [182] and [160].…”

Section: Other Supercharger Systemsmentioning

confidence: 99%

“…• turbochargers, i.e., fluid dynamic devices consisting of a compressor and a turbine on the same shaft (with rotation speeds of more than 200'000 rpm), utilizing some of the exhaust gas exergy to compresl:l the intake air [181]; • presl:lure wave I:luperchargers, i.e., gas dynamic devices consil:lting of a barrel whose narrow channels are in direct contact with both engine in and exhaust sides, also utilizing the exhaust gas exergy for the boosting process [68]; and • mechanical I:luperchargers (preferably with internal compression), which receive the power needed for boosting directly from the engine's crankshaft.…”

Section: Superchargersmentioning

confidence: 99%

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Introduction to Modeling and Control of Internal Combustion Engine Systems

2004

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SoftcOVel: reprint of the hardcover 1st edition 2004 The use of general descriptive names, registered names trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Preface Who should read this text?This text is intended for students interested in the design of classical and novel IC engine control systems. Its focus lies on the control-oriented mathematical description of the physical processes involved and on the model-based control system design and optimization. This text has evolved from a lecture series held during the last several years in the mechanical engineering (ME) department at ETH Zurich. The presumed audience is graduate ME students with a thorough understanding of basic thermodynamic and fluid dynamics processes in internal combustion engines (ICE). Other prerequisites are knowledge of general ME topics (calculus, mechanics, etc.) and a first course in control systems. Students with little preparation in basic ICE modeling and design are referred to [52] Why has this text been written?Internal combustion engines represent one of the most important technological success stories in the last 100 years. These systems have become the most frequently used sources of propulsion energy in passenger cars. One of the main reasons that this has occurred is the very high energy density of liquid hydrocarbon fuels. As long as fossil fuel resources are used to fuel cars, there are no foreseeable alternatives that offer the same benefits in terms of cost, safety, pollutant emission and fuel economy (always in a total cycle, or "wellto-wheel" sense, see e.g., [5] and [55]).Internal combustion engines still have a substantial potential for improvements; Diesel (compression ignition) engines can be made much cleaner and Otto (spark ignition) engines still can be made much more fuel efficient. Each goal can be achieved only with the help of control systems. Moreover, with the systems becoming increasingly complex, systematic and efficient system VI Preface design procedures have become technological and commercial necessities. This text addresses these issues by offering an introduction to model-based control system design for ICE. What can be learned from this text?The primary emphasis is put on the ICE (torque production, pollutant formation, etc.) and its auxiliary devices (air-charge control, mixture formation, pollutant abatement systems, etc.). Mathematical models for some of these processes will be developed below. Using these models, selected feedforward and feedback control problems will then be discussed.A model-based approach is chosen because, even though more cumbersome in the beginning, it after proves to be the most cost-effective in the long run. Especially the control system development and calibration processes benefit greatly from mathematical models at early project stages.The appendix contains a brief summary of the most important control...

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Section: Other Supercharger Systemsmentioning

confidence: 99%

Section: Superchargersmentioning

confidence: 99%

Introduction to Modeling and Control of Internal Combustion Engine Systems

2004

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“…Furthermore, this unique direct contact may also cause internal exhaust gas recirculation (EGR) usefully for reducing the NO x emission [4,5,10]. Meanwhile, there are other attractive advantages, such as large torque at small engine speeds and less soot during acceleration.…”

Section: Pressure Wave Superchargermentioning

confidence: 99%

“…Simultaneously, the expansion waves cause the exhaust gas pressure to go down. With that, the exhaust gas of low enthalpy finally goes toward the exhaust pipe [4,7,10].…”

Section: Pressure Wave Superchargermentioning

confidence: 99%

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Internal combustion engine supercharging: turbocharger vs. pressure wave compressor. Performance comparison

George

Chiru

2014

Open Engineering

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Thermodynamic analysis of a pulse combustion system and its application to gas turbines

Lampinen¹,

Turunen²,

Köykkä³

1992

Int. J. Energy Res.

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The study describes a special construction of a pulsating self-compressing combustion system, which gives nearly constant inand outflows of gas, and its use in connection with gas turbine power stations. The main idea of the selfcompressing combustion chamber is that the pressure at the outflow after combustion is higher than that at the inflow to the combustion chamber. The maximum thermodynamically possible pressure rise in the combustion chamber is solved and calculated for different temperature ratios and combustion processes. The thermodynamic advantage of pulse combustion for gas turbine systems is shown as a function of the self-compression pressure ratio.

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How Does the Comprex^® Pressure-Wave Supercharger Work?

Cited by 47 publications

References 1 publication

Introduction to Modeling and Control of Internal Combustion Engine Systems

Introduction to Modeling and Control of Internal Combustion Engine Systems

Internal combustion engine supercharging: turbocharger vs. pressure wave compressor. Performance comparison

Thermodynamic analysis of a pulse combustion system and its application to gas turbines

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How Does the Comprex® Pressure-Wave Supercharger Work?

Cited by 47 publications

References 1 publication

Introduction to Modeling and Control of Internal Combustion Engine Systems

Introduction to Modeling and Control of Internal Combustion Engine Systems

Internal combustion engine supercharging: turbocharger vs. pressure wave compressor. Performance comparison

Thermodynamic analysis of a pulse combustion system and its application to gas turbines

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Product

Resources

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How Does the Comprex^® Pressure-Wave Supercharger Work?