FR Hybrid System (Intelligent Dual Clutch Control)
Hybrid system for front-engine rear-wheel-drive vehicles achieving fuel consumption of a compact car with good acceleration
Nissan’s original one-motor two-clutch intelligent dual clutch control hybrid system has the fuel efficiency and environmental performance of a compact car while still maintaining a pleasurable driving experience with good response and a direct sense of acceleration better than a gasoline vehicle. The minimal system developed by Nissan has superb driving performance, such as the smooth driving feeling of an electric motor and powerful acceleration.
Technology Functionality
In
a
hybrid
system,
the
motor
supports
the
engine,
improving
driving
performance
and
fuel
consumption
by
regenerating
with
the
motor
and
storing
energy
in
the
battery,
using
this
to
drive
like
an
EV
and
for
accelerating.
The
one-motor
two-clutch
hybrid
system
can
separate
the
engine
from
the
drivetrain
as
necessary.
It
can
utilize
the
engine
and
motor
as
power
sources,
from
running
just
on
the
motor
to
using
both
motor
and
engine
for
full
acceleration,
achieving
a
more
efficient
drive
as
per
the
situation.
During
regeneration
and
electric-mode
driving,
the
engine
is
completely
disconnected
from
the
drive-train,
resulting
in
zero
loss
from
engine
friction.
Technology Configuration
System
Nissan
replaced
an
existing
7-speed
automatic
transmission’s
torque
converter
with
a
motor
and
two
clutches
in
a
compact
configuration.
Using
a
one-motor
system
to
drive
the
wheels
and
regenerate
electricity
allows
for
a
reduction
in
the
number
of
parts
and
a
lighter
weight.
The
two
clutches
transfer
energy
mechanically
to
the
engine
and
motor.
While
being
efficient
and
with
little
energy
loss
compared
to
a
normal
torque
converter,
the
system
also
has
intuitive
and
responsive
acceleration.
Through
integrated
control
of
this
system
and
transmission
using
high-level
control
technology
it
achieves
a
drive
that
responds
to
a
range
of
driving
conditions.
The
hybrid
car
lithium-ion
battery
can
discharge
high
currents
in
a
short
time.
In
this
way,
the
proportion
of
running
the
motor
increases,
and
it
is
possible
to
recover
braking
energy
frequently.
Being
able
to
use
electricity
effectively
means
the
consumption
of
gasoline
fuel
decreases
and
contributes
accordingly
to
better
mileage.
Division of Engine & Motor
The clutches are operated according to the driving situation in the following ways, using the engine and motor in different ways.
Clutch #1 disconnected, completely stopping the engine. Connecting with Clutch #2, electrical energy from the lithium ion battery is delivered.
Clutch #1 connected, directly delivering engine power to the transmission. Since there is no torque converter, the engine energy can be transferred directly.
Directly delivers engine and motor power for a more responsive acceleration using the high-output lithium ion battery.
Clutch #1 is disconnected, stopping and completely disconnecting the engine, so the engine rpm is zero and there is no engine friction. This means it can efficiently charge the battery from the motor.
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