Dynamic Control of the Coolant Temperature for a Reduction of Fuel Consumption and Hydrocarbon Emission

Krause, W.; Spies, Karl H.

doi:10.4271/960271

Cited by 18 publications

(6 citation statements)

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“…Electric flow control valves and diverter valves offer an effective alternative that can provide improved control [4] and have less resistance to flow than conventional thermostats [5]. Fuel savings of up to 3 per cent have been reported [6]. Such benefits have also been supported by the simulation work of Eberth et al [7].…”

Section: Introductionmentioning

confidence: 96%

Cooling system improvements — assessing the effects on emissions and fuel economy

Brace

Hawley

Akehurst

et al. 2008

Proceedings of the Institution of Mechanical Engineers, Part D:

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The work reported in this paper details an experimental study of the effects of cooling system hardware changes on diesel engine emissions and fuel economy. Experiments were performed under both steady state and transient conditions and complemented by statistical assessments. Techniques for assessing the thermal integrity of the engine as a consequence of such changes are also presented. An experimental design was constructed to investigate the effect of water pump throttling, coolant flow control through the oil cooler, and the adoption of a pressure resistive thermostat (PRT). Use of these thermal controls offers a useful trade-off between NO x and fuel economy, with a saving of around 3 per cent in b.s.f.c. for a 10 per cent NO x penalty at low load, where NO x output is less of a concern. However, these benefits were not observed during drive cycle testing.

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Section: Introductionmentioning

confidence: 96%

Cooling system improvements — assessing the effects on emissions and fuel economy

Brace

Hawley

Akehurst

et al. 2008

Proceedings of the Institution of Mechanical Engineers, Part D:

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show abstract

“…The thermodynamic boundary conditions, however, evolve much slower such that, from an engine system point of view, these effects must be modeled as dynamic processes [10]. Only with such a model will a precise control of the engine's thermal behavior be possible (see Chapter 4 and [114], [103]). …”

Section: Introductionmentioning

confidence: 99%

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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“…Engine coolant temperature sensor data is also used to control spark advance and exhaust gas recirculation [92]. Kenny et al [93], [94] reported one of the earliest attempts to measure coolant temperature by using a thermostat system and showed that it is possible to maintain engine temperature at a predefined level or adjust it. The advantage of their developed system is the capability to modify engine temperature during cruise, city driving or heavy load conditions-thus, optimizing fuel economy, engine torque generation, and emissions.…”

Section: Engine Coolant Temperature Sensormentioning

confidence: 99%

Towards self-powered sensing using nanogenerators for automotive systems

et al. 2018

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Harvesting energy from the working environment of vehicles is important for wirelessly monitoring their operation conditions and safety. This review aims at reporting different sensory and energy harvesting technologies developed for automotive and active safety systems. A few dominant sensing and power harvesting mechanisms in automotive systems are illustrated, then, triboelectric, piezoelectric and pyroelectric nanogenerators, and their potential for utilization in automotive systems are discussed considering their high power density, flexibility, different operating modes, and cost in comparison with other mechanisms. Various ground vehicles' sensing mechanisms including position, thermal, pressure, chemical and gas composition, and pressure sensors are presented. A few novel types self-powered sensing mechanisms are presented for each of the abovementioned sensor categories using nanogenerators. The last section includes the automotive systems and subsystems, which have the potential to be used for energy harvesting, such as suspension and tires. The potential of nanogenerators for developing new self-powered sensors for automotive applications, which in the near future, will be an indispensable part of the active safety systems in production cars, is also discussed in this review article.

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Dynamic Control of the Coolant Temperature for a Reduction of Fuel Consumption and Hydrocarbon Emission

Cited by 18 publications

References 0 publications

Cooling system improvements — assessing the effects on emissions and fuel economy

Cooling system improvements — assessing the effects on emissions and fuel economy

Introduction to Modeling and Control of Internal Combustion Engine Systems

Towards self-powered sensing using nanogenerators for automotive systems

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