CIMAC Congress - Schiff & Hafen

CIMAC CONGRESS | BERGEN 2010
economic and emission performances of this engine could be kept
good through optimizing fuel injection parameters when the engine
running in extreme high/low environment temperature condition.
However, the engine performance could be partly recovered only
depending on change fuel injection parameters when the engine
running at high altitude area. It is perhaps needed for diesel engine
running at high altitude to optimize the performance of turbocharger
also. The study work explains that numerical calibration method of
electrically-controlled fuel injection system by simulation analysis of
working process for whole diesel engine is an alternative method
relative to experiment calibration method. The optimum injection
parameters could be obtained approximately, economically and
conveniently through numerical calibration method. A lot of
consumption in labour, time and money may be saved from
experiment calibration.
Proposal on controlled spray evaporation
and mixture formation by use of mutlicomponent
mixing fuel spray model
Y. Kobashi, Kanazawa Institute of Technology,
Japan,
M. Matsumoto, J. Senda, Doshisha University, Japan,
E. Matsumura, Toyota Motor Corporation, Japan
A novel approach to control the spray evaporation, mixture formation
and combustion processes, which are leading to a reduction of diesel
engine emissions by using several kinds of mixed fuels with relatively
low injection pressure is proposed. In the mixed fuels, additives or
lower boiling point fuels, such as CO 2
, gas fuel and gasoline
component, are mixed into higher boiling point fuel such as diesel
gas oil, through vapor-liquid equilibrium with a formation of twophase
region in pressure-temperature diagram, where liquid and
vapor phases of both components are mixed in. In this scheme, the
authors intend to improve the fuel properties such as the viscosity
and to control both physical process, that is the fuel vapor formation
rate or spatial vapor distribution, and chemical processes, those are
the mixture ignition, emission reduction of NOx and PM, and HC
burn out. It is easy for mixed fuel to obtain flash boiling spray due to
the formation of two-phase region on P-T diagram and it provides
the relatively lean and homogeneous vapor mixture. In this paper,
the concept of the fuel property improvement scheme with this
mixing fuel application through the chemical-thermodynamics
theory is introduced. Then, the practical feature and simple modeling
approach for the cavitation phenomena inside the injection nozzle
hole are summarized to examine the spray atomization and
dispersion processes. Also, multi-component fuel spray evaporation
model is developed to simulate the spatial vapor distribution of each
fuel species based on multi-dimensional simulation code of KIVA. In
the experiments, spatial vapor distribution of the fuels is confirmed
by applying LIF optical measurement technique. And the actual
combustion performance are verified using a Rapid Compression &
Expansion Machine (RCEM), constant volume combustion vessel
and small sized DI diesel engines.
Economical and technical aspects of Duap`s
fuel injection parts and systems
E. Vogt, S. R. Jung, M. Poletti, Duap AG, Switzerland
Today the user of an large bore engine is confronted with two major
challenges: on one hand are the increasing fuel costs which are due
to the volatility of the crude oil price hard to predict, on the other
hand are the step-by-step more stringent international emission
levels. The fuel costs are the major part of the total operational costs
of a large bore engine – no matter if marine use or land based.
Furthermore, there are not many alternatives to IC engines for main
propulsion or power generation onboard of a vessel. Luckily, the
engine for itself is sturdy and reliable; some engines are well over 30
years old and still good for another one or two decades. But how to
keep up with the two major challenges? As far as the fuel injection
system is concerned, DUAP does have solutions. Without design
changes on the fuel injection system, which would require a lot of
work to renew the classification tests, DUAP can provide out of the
Duatop product line nozzles and pump elements for a large variety
of engines. These parts are manufactured at our site in Switzerland to
the highest level of quality standards and workmanship. What is the
benefit for the user? Simply spoken, saving costs. Fuel consumption
can be decreased and the TBO can be extended. The following article
will provide the technical background. Beside the Duatop spare
parts, DUAP also provides complete common rail fuel injection
systems, including the newest Electronic Engine Control Unit. Like
the Duatop spare parts, they are also produced in Switzerland. Due
to the wide product range of high pressures pumps, fuel rails,
injectors and sensors, a large variety of engines from approx. 500kW
to 12MW can be equipped. Of course this benefits are also for new
built engines and their manufacturer available. Additionally to the
fuel injection parts for MDO, MGO and HFO DUAP also provides
special components for gas engines, comprising complete Micro
Pilot Duarail systems as well as pre-chambers, check valves and gas
injectors. Although gas engines are more niche products than
mainstream, their spread will expand due to good emission levels
and moderate fuel costs. The intention of this paper is to demonstrate
the benefits Duarail and Duatop FIE parts can provide to engine
OEM’s and end-users. Their technical features and new engineering
results in numerical simulation like FEM or hydraulic simulation
and extensive testing in DUAP’s own test facility as well as aspect
regarding components for gas engines are included.
The new Heinzmann common-rail and EFI
engine control system for medium-speed
and high-speed engines
M.- T. Heller, A. Jaufmann, Heinzmann, Germany
In the near future the development of diesel engines for industrial,
marine, gensets and rail traction application will have to cope with
considerable challenges, as forthcoming emission limits, e.g. IMO &
EPA Standards, will be further reduced throughout the world. To be
prepared for this global tendency holistic optimisation of complete
diesel systems, consisting of high-pressure injection like commonrail
technology, engine and combustion processes and exhaust gas
after-treatment, is necessary. Heinzmann has more than 20 years of
experience in the field of digital state-of-the-art electronic fuel
injection (EFI) control and monitoring systems for modern largebore
engines. Building on the success of the Heinzmann Dardanos
Engine Control Units, Heinzmann has added the next generation
system, Odysseus, to its existing range of electronic components.
Odysseus is the last word in fully-integrated fuel injection equipment
(FIE); combining sophisticated injectors, high-pressure pumps,
accumulators and piping. This innovative product allows Heinzmann
to offer an attractive integrated solution for high-pressure marine
and heavy diesel fuel injection systems to meet the demands of
future emission reduction challenges. In this session Heinzmann
will present their new high-performance common-rail System for
medium-speed and high-speed diesel engines; for industrial power
generation and marine applications. By way of interesting customer
case studies, representing specific diesel engine projects, this
technical paper will describe the achievements of using high
precision components for fuel injection equipment. Functional
groups such as special control valves and high-pressure elements as
well as control electronic will be discussed, including endurance
88 Ship & Offshore | 2010 | No. 3