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Journal Article

Innovations In Experimental Techniques For The Development of Fuel Path Control In Diesel Engines

2010-04-12
2010-01-1132
The recent development of diesel engine fuel injection systems has been dominated by how to manage the degrees of freedom that common rail multi-pulse systems now offer. A number of production engines already use four injection events while in research, work based on up to eight injection events has been reported. It is the degrees of freedom that lead to a novel experimental requirements. There is a potentially complex experimental program needed to simply understand how injection parameters influence the combustion process in steady state. Combustion behavior is not a continuum and as both injection and EGR rates are adjusted, distinct combustion modes emerge. Conventional calibration processes are severely challenged in the face of large number of degrees of freedom and as a consequence new development approaches are needed.
Technical Paper

Modeling for Diesel Engine Control: The CPower Environment

1998-02-23
980794
Diesel engine control has already become complex, and in order to meet future emissions standards (such as Euro 4) it is likely to be the control system that will provide the needed performance increment. Common rail fuel injection offers yet more degrees of freedom which will need to be exploited as new emissions standards emerge. Whatever the emissions standards, there is a need to reduce risk at the earliest stages in the development of the powertrain. This will involve early and extensive simulation of the powertrain including its control system, sensors and actuators. What is the best way to achieve this using current tools? The result lies in a combination of a phenomenological model of the engine and a flexible controls environment. To illustrate the principles of developing prototype control systems, we will use the example of the CPower environment, which is a combination of a detailed engine simulation code (GT-Power) and the Simulink simulation environment.
Technical Paper

The Potential for Thermo-Electric Devices in Passenger Vehicle Applications

2010-04-12
2010-01-0833
The promise of thermo-electric (TE) technology in vehicles is a low maintenance solid state device for power generation. The Thermo-Electric Generator (TEG) will be located in the exhaust system and will make use of an energy flow between the warmer exhaust gas and the external environment. The potential to make use of an otherwise wasted flow of energy means that the overall system efficiency can be improved substantially. One of the barriers to a successful application of the technology is the device efficiency. The TE properties of even the most advanced materials are still not sufficient for a practical, cost effective device. However the rate of development is such that practical devices are likely to be available within the next fifteen years. In a previous paper [ 1 ], the potential for such a device was shown through an integrated vehicle simulation and TEG model.
Technical Paper

Integrating Formula SAE with the Engineering Curriculum

2005-04-11
2005-01-1796
The Formula SAE competition (known as Formula Student in the UK) is well established and continues to be highly popular with engineering students. The annual United Kingdom competition bears witness to this enthusiasm with a strong turnout of a total of 84 teams, including 41 teams from the United Kingdom and 21 other nations represented in 2004. In 2004 some countries, including Japan, Australia and South Korea participated for the first time. There are, for a university, significant implications of resource costs when running the Formula SAE project, mainly financial and time. Time costs in particular are acute with supervision time from university faculty groups and technicians (this latter being particularly intense). This investment needs justification in the light of other demands.
Technical Paper

Project-Based Learning in University Programmes: Getting the Best Out of Formula SAE

2006-04-03
2006-01-1046
At Sussex our attempts to introduce Formula SAE were initially slow and the results disappointing. At the same time we were developing and introducing modules in our engineering programmes that were entirely project-based, and in one case, included only e-learning, (with no lectures) after an introductory briefing. Formula SAE made faltering progress whilst it remained a voluntary activity. Support of a voluntary group by means of individually assessed projects at both undergraduate and masters level simply led to a series of unconnected technologies, although they were to prove of value later. Project-based activity in engineering had three distinctive characteristics which were to form our approach to Formula SAE: the need for a strong team ethos from the start of the project; an acceptance of the importance of process, and in particular project planning; and strong communication.
Technical Paper

An Evaluation of Formula SAE in the Context of the UK Engineering Education: Culture, Money and Space

2007-04-16
2007-01-1051
This paper presents the conclusions of a study into the way the Formula SAE project works in the UK academic sector. The motivation for the work arose during the introduction of the project at the University of Sussex when we needed to evaluate the cost effectiveness of the project as part of the engineering curriculum. The traditional view of FSAE in the UK was that it proved a valuable recruitment tool and when only a few universities offered the project to students this was clearly the case. However now that the project is more widely adopted and where smaller Departments are now supporting the project, there is a need to look more closely at the effectiveness of the project. Identification of the factors that make a successful entry has also helped in an evaluation of the resource requirements. The general conclusion from the work is that Departments must work to extract the benefits of the project through curriculum planning.
Technical Paper

Automatic PI Controller Calibration Optimization using Model-Based Calibration Approach

2015-09-01
2015-01-1989
Model-based calibration (MBC) is a systematic method to calibrate an engine control unit (ECU) system. Due to the working principle of MBC, it is only being used for steady-state systems (time independent models). This limits the use of MBC; because an ECU contains statistical and dynamical systems. Due to the limitations of MBC, dynamical systems require manual tuning which may be time-consuming. With the increasing popularity in hybrid and electrical vehicle systems, most of them rely on dynamical systems. Therefore, MBC is about to be superseded by manual parameterization methods. Remarkably, MBC is not limited to the steady state systems. It can be achieved by separating the time factor of a system and extracting the statistical data from a time series measurement. Typically, MBC model is conceived as the representation of a system plant (i.e.: air path, fuel path, mean value engine model). As a matter of fact, MBC model is not limited to identification of system plant.
Technical Paper

More Leaders and Fewer Initiatives: Key Ideas for the Future of Engineering

2015-04-14
2015-01-0411
Panel Discussions held at the SAE World Congress in both 2013 and 2014 observed that a shortage of good quality engineering talent formed a chronic and major challenge. (“Good quality” refers to applicants that would be shortlisted for interview.) While doubts have been expressed in some quarters, the shortage is confirmed by automotive sector employers and the Panel's view was that it was symptomatic of a range of issues, all of which have some bearing on the future of the profession. Initiatives to improve recruitment and retention have had varying degrees of success. Efforts need to be intensified in primary schools where negative perceptions develop and deepen. Schemes like AWIM that operate on a large scale and are designed to supplement school curricula should operate at an international level. Universities represent the entry point into the engineering profession and their role in the recruitment process as well as education and training is crucial.
Technical Paper

Starting and Developing an Engineering Career: The Barriers and Opportunities

2014-04-01
2014-01-0625
There has probably never been such a demand for professionally qualified engineers, and yet both the number and diversity of people entering the profession continue to decline. Worldwide, there are very many initiatives - some generally encouraging interest in the profession, and others targeting specific audiences. The reports speak of local success, but the overall picture remains discouraging. In this paper we focus on the “pipeline” from primary education through to the transition from graduate engineer into an experienced member of engineering staff. We have based the discussion on both the presentations and comments made during a panel discussion held at the 2013 SAE International Congress. The paper is intended as a summary of the points raised during that discussion and, we hope proves to be starting point for further investigation and analysis. Of particular note is the sheer diversity of initiatives, and the pressing need for role models and mentoring.
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