FME Transaction,
Год журнала:
2024,
Номер
52(4), С. 544 - 555
Опубликована: Янв. 1, 2024
Efficient
energy
exploitation
is
a
necessary
issue
because
it
helps
reduce
fuel
consumption
and
environmental
pollution.
Finding
the
optimal
ignition
timing
(IT)
for
diesel
engines
to
create
high
power
efficiency
deserves
attention.
This
study
utilizes
AVL
BOOST
simulation
software
with
Vibe
2-Zone
combustion
model
investigate
effect
of
IT
duration
on
engine
characteristics
such
as
power,
torque,
brake-specific
(BSFC)
at
different
loads
speeds.
Then,
prediction
models
ITs
versus
durations
maximum
minimum
BSPFC
were
computed.
The
results
show
that
strongly
affect
performance
characteristics.
produces
are
unaffected
by
load.
In
contrast,
they
considerably
influenced
load
when
considering
engine-generated
BSFC.
correlations
linear
functions.
can
be
utilized
predict
timings
since
experimental
time
reduced
applied
actual
engine.
Energies,
Год журнала:
2025,
Номер
18(7), С. 1722 - 1722
Опубликована: Март 29, 2025
Issues
related
to
the
components
of
modern
fuel
equipment
wear
processes
have
been
discussed.
The
injector
is
one
key
elements
system,
because
it
a
device
responsible
for
distributing
and
spraying
hydrogen-containing
in
engine
combustion
chamber.
It
mounted
head
directly
If
faulty,
affects
operating
parameters
particular
ecological
engine,
such
as
emission
toxic
substances
into
environment.
Additionally,
hydrogen
reactor
has
installed
Common
Rail
(CR)
task
which
produce
hydrogen.
As
result
temperature
prevailing
environment
injection
equipment,
various
types
occur
inside
including
degradation.
degradation
precision
pairs
injectors
analyzed
classified.
Microscopic
tests
were
performed
analyze
contamination
system
compare
on
efficient
worn
injectors.
nitrogen
oxides,
carbon
monoxide
soot
parameter.
established
that
loss
damaged
significantly
size
doses
mixture
containing
Energies,
Год журнала:
2025,
Номер
18(3), С. 453 - 453
Опубликована: Янв. 21, 2025
The
promotion
of
electric
mobility
is
a
key
objective
energy
transition,
and
it
aimed
at
significantly
reducing
greenhouse
gas
emissions,
with
road
transport
being
understood
as
major
contributor.
Despite
its
potential,
the
adoption
vehicles
(EVs)
in
logistics
faces
critical
challenges,
including
limited
battery
range,
charging
time,
availability
infrastructure.
Moreover,
deploying
stations
must
be
carefully
coordinated
public
grid
to
ensure
seamless
integration.
This
paper
proposes
novel
methodology
for
optimal
design
management
EV
fleets
logistics.
Our
approach
introduces
innovations
such
leveraging
self-produced
electricity
incorporating
time-varying
prices
that
can
tailored
individual
nodes.
marks
an
important
step
toward
comprehensive
interdisciplinary
framework
integrates
technical
solutions
policy
considerations.
Through
case
studies,
we
explore
how
various
parameters
resource
distributions
influence
decisions.
findings
demonstrate
significant
potential
cost
reduction
enhanced
efficiency
when
applying
this
EV-based
logistics,
thereby
offering
actionable
insights
advancing
sustainable
transportation.
Energies,
Год журнала:
2025,
Номер
18(4), С. 939 - 939
Опубликована: Фев. 16, 2025
The
research
described
in
this
paper
aimed
to
verify
the
impact
of
road
vehicle
aging
on
air
pollutant
emissions.
problem
and
resulting
changing
emissions
was
identified
with
operational
mileage
passenger
cars.
validity
such
an
approach
over
time
confirmed
by
a
preliminary
review
publications
scientific
databases
as
Scopus
Web
Science.
presented
assess
essential
(CO,
CO2,
NOX).
method
included
measuring
actual
RDE
using
equipment,
i.e.,
SEMTECH
DS
gaseous
exhaust
gas
component
analyzer.
This
study
conducted
vehicles
diesel
engines,
different
operating
ages,
mileages,
engines
similar
displacement,
mostly
1.9–2.0
dm3,
equipped
manual
transmissions.
tests
were
Poznań
agglomeration.
results
measured
mode
allowed
for
mapping
changes
engine
displacement
function
age
(mileage)
also
collecting
data
analyses
field
modeling
within
phenomenon.
Frontiers in Mechanical Engineering,
Год журнала:
2025,
Номер
11
Опубликована: Фев. 17, 2025
In
times
of
global
climate
change,
the
reduction
in
friction
technical
applications
is
crucial
significance.
Surface
textures
are
one
possibility
for
reducing
lubricated
contacts.
To
provide
a
deeper
understanding
effects
surface
on
tribological
performance,
this
study
analyzes
wedge-shaped,
textured
lubrication
gaps
using
novel
test
rig
with
an
situ
gap
height
measurement.
Using
experimental
pin-on-disc
setup,
chevron-shaped
and
cylindrical
two
different
heights
(h
t
=
10
50
µm)
were
tested
under
full-film
conditions.
The
pin
was
tilted
very
precise
way
to
generate
convergent
gap.
results
show
potential
textures.
general,
it
can
be
stated
that
investigated
clearly
behavior
compared
smooth
reference
specimens.
Mostly,
force
measured
texture
specimens,
which
accompanied
by
height.
system
still
operates
lubrication,
but
there
higher
risk
entering
mixed-friction
regime.
summary,
no
universal
performance
trend
single
stated;
needs
checked
each
specific
operating
point
provides
best
enhancement.
Energies,
Год журнала:
2025,
Номер
18(5), С. 1038 - 1038
Опубликована: Фев. 21, 2025
This
article
presents
the
results
of
a
study
on
rheological
and
lubricating
properties
selected
alcohol
fuels.
Methanol,
ethanol,
2-propanol
are
investigated,
for
which
density,
kinematic,
dynamic
viscosity
determined
at
temperatures
in
range
15–60
°C.
In
addition,
water
content
studied
fuels
is
determined.
Based
measurements,
coefficient
temperature
change
density
relative
percentage
decrease
kinematic
with
increasing
calculated.
Subsequently,
regression
models
built
to
describe
value
tested
liquid
as
function
temperature.
Next,
under
subjected
evaluation
antiwear
using
high-frequency
reciprocating
rig
(HFRR).
For
each
fuel,
corrected
wear
scar
size
WS1.4,
measure
lubricity,
average
friction,
oil
FILM
thickness
during
conduct
HFRR
test
standardized
conditions,
The
measurements
carried
out
25
°C
accordance
methods
time
equal
75
min.
Due
low
lubricity
fuels,
additional
tests
performed
reduced
30
this
case,
all
show
similar
WS1.4
value,
ranges
from
384
μm
methanol
through
422
426
ethanol.
marks
samples
after
execution
used
draw
qualitative
conclusions
about
alcohols.
obtained
summarized,
possibilities
their
use
further
research
provided.
Energies,
Год журнала:
2025,
Номер
18(5), С. 1276 - 1276
Опубликована: Март 5, 2025
The
aim
of
this
study
is
to
design
and
analyze
a
variable
compression
ratio
(VCR)
technology
gasoline
engine
connecting
rod
set
verify
its
kinematic
properties
through
numerical
simulations.
This
first
constructs
mathematical
model
the
VCR
derives
equations.
Numerical
simulations
were
carried
out
using
MATLAB
R2022b
software
state
piston
under
different
conditions.
results
show
that
equations
motion
mechanism
realize
continuously
ratios
from
8
14,
which
provides
valuable
reference
for
overall
performance
control.
also
verified
accuracy
theoretical
multibody
dynamics
ADAMS
2020
ensure
reliability
model.
position
jointly
influenced
by
crankshaft
angle
control
shaft
angle,
change
in
leads
upper
lower
stop
positions
stroke.
With
increase
maximum
velocity
(absolute
value)
gradually
decreases,
while
acceleration
increases.
provide
important
data
development
engines.
Energies,
Год журнала:
2025,
Номер
18(6), С. 1391 - 1391
Опубликована: Март 12, 2025
This
study
explores
the
potential
of
hydrogen-enriched
internal
combustion
engines
(H2ICEs)
as
a
sustainable
alternative
to
fossil
fuels.
Hydrogen
offers
advantages
such
high
efficiency
and
zero
carbon
emissions,
yet
challenges
related
NOx
formation,
storage,
specialized
modifications
persist.
Machine
learning
(ML)
techniques,
including
artificial
neural
networks
(ANNs)
XGBoost,
demonstrate
strong
predictive
capabilities
in
optimizing
engine
performance
emissions.
However,
concerns
regarding
overfitting
data
representativeness
must
be
addressed.
Integrating
AI-driven
strategies
into
electronic
control
units
(ECUs)
can
facilitate
real-time
optimization.
Future
research
should
focus
on
infrastructure
improvements,
hybrid
energy
solutions,
policy
support.
The
synergy
between
hydrogen
fuel
ML
optimization
has
revolutionize
technology
for
cleaner
more
efficient
future.
Applied Sciences,
Год журнала:
2025,
Номер
15(7), С. 3849 - 3849
Опубликована: Апрель 1, 2025
This
study
aims
to
evaluate
and
optimize
the
influences
of
operational
factors,
including
engine’s
rotational
speed,
methane
mass,
diesel
duration
injected
fuel
on
methane/diesel
reactivity-controlled
compression
ignition
(RCCI)
light-duty
performance
emissions
by
executing
Nondominated
Sorting
Genetic
Algorithm-II
(NSGAII).
The
optimizations
aimed
minimize
peak
firing
pressure
simultaneously,
decrease
indicated
specific
consumption,
reduce
tailpipe
emissions.
It
is
found
that
excess
air
ratios
(2.22
2.37)
are
range
feasible
results
RCCI
engine,
power
should
be
less
than
0.89
from
maximum
design
load
engine
when
it
works
without
after
treatment.
achieves
an
indicative
thermal
efficiency
51%.
Pareto
NSGA
algorithm
occur
multiple
fronts,
there
a
tradeoff
between
nitrogen
oxide
(NOx)
in
addition
unburned
hydrocarbons
(UHCs)
carbon
monoxide
(CO)
with
NOx
Moreover,
EURO
IV
regulations
can
using
start
injection
(SOI)
−35
CA,
mass
1.82
mg,
9.74
2.63
speed
2540
rpm.
accomplished
reduction
consumption
27.8%,
higher
21.9%,
reductions
compared
conventional
engine.
