SAVANNAH,
GA (September 20, 2006) – Volvo Trucks
North America today introduced the
innovative and fuel-saving Volvo I-Shift
automated transmission for Model Year 2008
Volvo trucks. I-Shift can be ordered now for
delivery in the second quarter of 2007.
The announcement was made at a news
conference here.
The
Volvo I-Shift is a technologically advanced
transmission designed specifically for
Volvo’s new family of heavy-duty diesel
engines. I-Shift incorporates a host
of fuel-saving and productivity enhancing
features into a reliable, durable and
lightweight design.
“We
believe customers will immediately recognize
the advantages I-Shift offers for
productivity, lower cost of operation,
driver recruitment and retention, and
safety,” said Scott Kress, senior vice
president – sales & marketing.
“The combination of I-Shift with Volvo’s
new engine family gives our customers a
complete vehicle and drivetrain solution.
“The
truck, the engine and the transmission have
all been engineered and designed to work as
one integrated, exceptionally efficient
machine,” Kress said. “Customers
can always get the perfect ratio at the
right time for optimal engine and vehicle
performance, which means a higher degree of
productivity, fuel economy and reliability.
And I-Shift’s light weight means more
payload per trip.”
Volvo
will offer three I-Shift models, with the
ability to handle all power and torque
inputs from its new engine family, including
the top 600 hp/2050 lb-ft rating.
I-Shift will be available for all Volvo
truck models, including the Volvo VN and
Volvo VT highway tractors, and the Volvo VHD
vocational truck.
Volvo
I-Shift
|
|
AT2512C
|
ATO2512C
|
ATO3112C
|
|
Operation
|
Two
Pedal
|
Two
Pedal
|
Two
Pedal
|
|
Forward
Speeds
|
12
|
12
|
12
|
|
Used
With
|
D11/D13
|
D11/D13
|
D16
|
|
Overall
Ratio
|
14.94:1
|
15.04:1
|
15.04:1
|
|
Top
Ratio
|
Direct
1.00:1
|
Overdrive
0.78:1
|
Overdrive
0.78:1
|
|
Weight
lbs (kg)
|
597
(275)
|
597
(275)
|
610
(281)
|
Volvo
has sold approximately 80,000 I-Shift
transmissions in other markets to date.
The I-Shift was introduced in early
2002, and is Volvo’s third generation of
automated manual transmission; the first
generation was introduced in 1987.
Volvo has sold approximately 19,000
I-Shifts in Europe in the first six months
of 2006.
Technical
Details
The
Volvo I-Shift is a 12-speed, single
countershaft transmission built up with a
splitter, a main section with three forward
and one reverse gear, plus a range gear.
It is an automated mechanical
transmission and does not use synchronizers
in its main section.
The I-Shift is a ”two-pedal”
transmission and does not require a clutch
pedal.
The transmission’s controls are
located on a compact control console and
lever attached to the driver’s seat.
I-Shift’s
sophisticated electronics and programming
were optimized for use with Volvo’s new
D11, D13 and D16 engines.
The
I-Shift electronic control unit (ECU), the
VECTRO Engine Management System and the
Volvo Vehicle ECU
were
designed by the same team and use the same
protocols for seamless, integrated
operation.
Built-In
Intelligence
Because
of how the Volvo engines and I-Shift are
integrated, I-Shift is programmed with the
engines’ efficiency map for each engine
rating.
The transmission combines this
knowledge with sensors to continuously
calculate the vehicle’s speed,
acceleration, torque demand, weight, rolling
and air resistance, and road grade to
continuously predict and select the most
efficient utilization of the engine for the
next 30 seconds.
This means optimum performance and
fuel economy at all times.
I-Shift’s
road grade sensor not only helps the
transmission determine which gear to start
off in, but also when it can skip shift, for
further smooth operation and fuel economy.
The road grade sensor is exclusive to
Volvo.
I-Shift can also determine how the
gradient is changing, which helps it predict
whether a gear change will be necessary.
I-Shift
is also fully integrated into the Volvo
Engine Brake system, and can automatically
downshift the engine to maintain set cruise
speeds on downhills.
Key
Features
One
of I-Shift’s key advantages is that it
makes even drivers with limited experience
shift as expertly as the best drivers, for
improved fuel economy and less stress on the
driveline and tires.
It
also keeps the driver’s hands on the wheel
and eyes on the road, as it relieves the
inexperienced driver of the challenge of
selecting and shifting into the correct
gear. The
driver can always concentrate on what is
happening around him in traffic, which
improves safety.
I-Shift also benefits all drivers by
reducing workload and fatigue, especially in
congestion.
I-Shift never gets tired and
continues to shift as well as the best
driver, all day long, with the best possible
fuel economy.
I-Shift
has other fuel economy improvement features
built-in.
One is Eco-Roll, an energy management
feature that improves fuel economy in the
top gear when operating in rolling hills.
This
is particularly useful since most linehaul
trucks spend 90 percent of their time in top
gear.
Eco-Roll
is a Volvo-exclusive feature that
automatically disengages the engine when the
vehicle is in top gear on a long, slight
downgrade which requires no engine torque
input. By allowing the engine to idle in
these situations, Eco-Roll can reduce
parasitic losses by as much as 30 hp.
Eco-Roll re-engages the engine as
soon as one of the following happens:
•
The speed reaches the engine brake
set speed for the cruise control
•
The driver touches the brake
•
The driver touches the engine brake
control stalk
•
The driver touches the accelerator
•
Or, if the vehicle speed increases
past a pre-set limit.
Another fuel-saving option is direct drive.
When an I-Shift is ordered with
direct drive, in 12th gear the transmission
output shaft is tied directly to the input
shaft.
This results in less power loss due
to friction between mating gears.
Transmissions with direct drive can save as
much as 1.5 percent in fuel vs. overdrive
transmissions.
That equals as much as 3-4 hp in a
typical truck today.
I-Shift
features a lube oil pump, which pumps
lubricant around through drilled passageways
to get oil where it’s needed, unlike
common splash lubricant designs where all
the gears are immersed in the lubricant.
This can reduce parasitic demand on
the vehicle by as much as 2-3 hp for greater
fuel economy.
I-Shift also offers a lube oil
filter, to catch any contaminants and to
ensure clean lube oil for longer life.
There
are five feature packages for I-Shift, to
give it more features and greater
flexibility than any other automated
mechanical transmission.
And Volvo’s enhanced engine brake,
I-VEB, is standard with I-Shift.
I-Shift
is also available with a kick-down switch on
the accelerator pedal, a feature designed to
enhance driving performance.
When engaged, the kick-down switch
gives the driver maximum acceleration, for
instance, when passing.
The kick-down feature can also be
enabled by Volvo’s Performance Bonus
Software package to reward the driver for
saving fuel.
There
are two major operating modes offered with
I-Shift:
Fuel Economy (E) and Performance (P).
In
“E” mode, the transmission will select
shift points and engine parameters to
maximize fuel economy.
In “P” mode, gradeability is
maximized.
The ability to choose these modes for
the same transmission enhances the truck’s
resale value.
Volvo
also offers a third mode, for times when
traffic is jammed and creeping along is the
only option.
The Idle
Governor driving mode
complements the cruise control when driving
slowly and without cycling the clutch.
It allows the engine to operate at
idle without using the accelerator pedal for
best fuel economy and to adjust the speed by
selecting the gear that best suits the pace
of the traffic.
The
idle governor will adjust the torque to
maintain idle speed and thereby constant
vehicle speed, although the engine load may
vary. A
slight drag on the brake will cause the
transmission to change down one gear, while
a touch of the throttle increases to the
next higher gear.
The clutch is only disengaged when
the truck is stopped.
Upgrades
and Flexibility
Each
of the three I-Shift transmissions can
handle any of the available engine ratings
from the lowest to the highest for its
applicable engine.
This means, a Volvo D11, D13, or D16
can be uprated to its highest horsepower and
torque rating without needing to modify
clutch or transmission.
Customers can also upgrade to a
higher feature package with the same
transmission.
This maximizes operational
flexibility and resale value.
Warranty,
Service and Support
Each
I-Shift comes with an outstanding warranty:
·
Five
years/750,000 miles parts and labor for
engines with 1750 lb-ft of torque or less
·
Three
years/500,000 miles for engines above 1750
lb-ft of torque.
I-Shift
can be diagnosed using Volvo’s electronic
tools, VCADS Pro and VCADS Elite.
Fault
codes can also be accessed through Volvo’s
sophisticated built-in Driver Display, which
is standard with mid- and high-level
instrument display clusters.
Volvo
Trucks North America assembles its Volvo VT,
VN and VHD trucks in the United States, at
the ISO14001 and ISO9001 certified New River
Valley Plant in Dublin, Virginia.
Volvo engines for North America are
assembled in Hagerstown, Maryland.
Volvo sponsors the America’s Road
Team national highway safety outreach
program.
Volvo
Trucks North America is part of the Volvo
Group of companies, a publicly held company
headquartered in Gothenburg, Sweden.
With 2005 sales of approximately $31
billion, Volvo’s business areas include
heavy trucks, buses, construction equipment,
marine and industrial drive systems,
aerospace, and financial services.
In the United States, Volvo shares
are listed on NASDAQ and are traded as ADRs
(symbol: VOLV).
Courtesy of Volvo Trucks North America,
Inc.