International Journal of Automotive Engineering and Technologies,
Год журнала:
2024,
Номер
13(3), С. 123 - 132
Опубликована: Сен. 30, 2024
In
this
study,
the
effect
of
nanoparticle
addition
into
rapeseed
methyl
ester
(R0)
produced
by
transesterification
method
on
engine
performance
and
emissions
was
experimentally
investigated.
Titanium
dioxide
used
as
a
nano
fuel
additive
added
to
test
fuels
at
rates
50
ppm
(RTi50)
75
(RTi75)
using
an
ultrasonic
mixer.
The
titanium
exhaust
determined
taking
advantage
its
photocatalysis
chemical
reaction
accelerator
properties.
Additionally,
reduced
viscosity
density
biodiesel
fuel,
resulting
in
higher
micro
explosion.
According
results
carried
out
4
different
loads,
brake
specific
consumption
decreased
7.51%
8.62%
RTi50
RTi75
compared
R0
fuel.
Brake
thermal
efficiency
increased
2.47%
6.21%,
respectively.
improvement
combustion
achieved
conversion
CO
CO2,
NOX
emissions,
smoke
caused
more
complete
products
come
exhaust.
Energies,
Год журнала:
2024,
Номер
17(16), С. 4126 - 4126
Опубликована: Авг. 19, 2024
In
modern
society
where
fossil
fuel
prices
are
increasing
and
environmental
issues
becoming
more
severe,
biodiesel,
as
a
new
type
of
clean
fuel,
is
receiving
attention.
Biodiesel
has
the
advantages
renewability,
friendliness,
good
properties,
demonstrating
broad
application
prospects.
However,
use
biodiesel
also
faces
some
challenges,
such
higher
density
kinematic
viscosity,
lower
calorific
value,
etc.
The
nanoparticles
in
engines
helps
to
achieve
goal
fuel.
terms
characteristics,
increase
cetane
flash
point
improving
combustion
efficiency
safety,
but
may
affect
combustion.
can
promote
micro
explosions
secondary
atomization
improve
cylinder
pressure,
heat
release
rate,
brake
thermal
while
reducing
consumption.
Nanoparticles
reduce
HC
CO
emissions,
through
oxygen
reaction
area,
incomplete
products.
On
contrary,
CO2
emissions
because
better
conditions
oxidation
reactions.
For
NOX
temperature
others
emissions.
Comparison
shows
that
all
offer
varying
degrees
improvement
engine
performance
provided
by
TiO2
significantly
than
other
nanoparticles.
future,
synergistic
effect
multiple
should
be
explored
further
achieving
effects
cannot
achieved
single
nanoparticle.
Atmosphere,
Год журнала:
2025,
Номер
16(1), С. 94 - 94
Опубликована: Янв. 16, 2025
With
the
increasingly
prominent
environmental
and
energy
issues,
emission
regulations
are
becoming
more
stringent.
Ammonia
diesel
dual
fuel
(ADDF)
engine
is
one
of
effective
ways
to
reduce
carbon
emissions.
This
study
investigated
effect
multiple
injection
strategy
on
combustion
characteristics
liquid
ammonia/diesel
direct
(DI)
engines
through
numerical
simulation.
The
results
showed
that
under
condition
maintaining
same
pre
high
ammonia
ratio
(80%),
with
introduction
injection,
peak
cylinder
pressure
decreased
phase
advanced,
start
angle
(CA10)
heat
release
a
multi-stage
pattern.
times
(TSOI)
has
significant
As
TSOI
increased,
ignition
delay
decreased,
duration
shortened,
accelerated.
Notably,
overall
emissions
NOx
N2O
have
but
unburned
NH3
increased.
Optimized
state
(SOAI)
timing
(AIP),
advancing
SOAI
increasing
AIP
improved
combustion.
Advanced
−8
°CA
ATDC,
resulted
in
decrease
an
increase
TSOI,
reaching
over
50%.
Although
can
improve
combustion,
it
also
higher
