Scania press release

PRESS info
P13303EN / Per-Erik Nordström
21 March 2013
Spectacular fuel savings
– Scania Opticruise with performance modes
Numerous new features, including Scania Active Prediction, have been
integrated free-of-charge with Scania Opticruise into a predictive powertrain
control system that provides fuel savings of 4-5 percent. Specialised performance
modes have been developed to boost efficiency in different applications.
A basic version of Scania Opticruise is an additional option for maximum fuel
economy. With limited functionality, it further simplifies economical driving.
The new Economy mode is tuned for maximum fuel saving in long-haulage. Scania
Opticruise, Scania Active Prediction and the new Economy mode provide combined
fuel savings of up to 4-5 percent. Further significant savings are obtained from the
aerodynamic refinements introduced with Scania Streamline, low-drag gearboxes
and the second generation 450 and 490 hp Euro 6 engines.
Scania Active Prediction is a predictive cruise control system that uses GPS and
topographical map data to finely regulate the cruising speed. It is fully integrated in
the new functionality, using different fuel-saving strategies in different performance
modes. The new version of Scania Ecocruise is fitted in markets where no topographical
map data is available.
The new performance modes enable customers to tailor the vehicle’s performance to
suit each type of operation, as well as to individual preferences regarding functionality
and driver influence. All settings can be altered or fine-tuned by a Scania
workshop.
Standard Economy Power Off-road
The new features are integrated in existing controls – i.e. the steering wheel buttons
for Scania Active Prediction and the steering wheel lever for Scania Opticruise.
Switching between modes is done by toggling the ring switch and the modes
available are shown in the central display.
Scania
Corporate Relations Telephone +46 8 553 810 00
SE-151 87 Södertälje Fax +46 8 553 855 59
Sweden
www.scania.com

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Ring switch
N Neutral
D Drive
R Reverse
Mode toggle
Mode toggle
– Standard mode
E Economy mode
P Power mode
O Off-road mode
Lever
+ Manual upchange
– Manual downchange
– (hold 1 s) Manoeuvring
A/M Automatic/manual
AUT switch
AUT Automatic retarder
via brake pedal
Customised performance – up to three modes on each truck
Up to three performance modes can be specified on vehicles with Scania Opticruise.
Several other parameters can be set individually according to customer needs and
all settings can be altered by a Scania workshop if required.
• Standard mode is an all-round mode optimised to provide good fuel economy,
while still delivering good hill performance. The system strives to run the engine at
maximum torque during hillclimbing.
Scania Active Prediction is fully integrated in the functionality, increasing speed
slightly to gain momentum before entering an uphill section. Before entering a
descent, the vehicle starts coasting to save fuel, and gains downhill speed using
the momentum of the vehicle. The system works within a speed window of 6
percent below and 4 percent above the set cruising speed (–6%, +4%).
• Economy mode is tuned to consume as little fuel as possible with some sacrifice
in terms of trip time. Engine response is soft (with Euro 6 engines).
Alternative speed limiter settings of 85 or 80 km/h can be chosen, which engage
automatically when switching to Economy mode. Kickdown is disabled.
Scania Active Prediction uses a special economy strategy. The speed window
spans from 12 percent below up to the set cruising speed (–12%, 0%). The
minimum adjustable offset for downhill speed control with a retarder is 5 km/h
above cruising speed in Economy mode (3 km/h in other modes).
• Power mode is intended for runs where transport time is at a premium. Engine
response is aggressive (Euro 5 with XPI, Euro 6 engines) and uphill performance
is optimised by running the engine at maximum power, with slightly quicker
gearchanges than in Standard mode. Scania Active Prediction is not available
and the cruise control has normal functionality.
• Off-road mode is suitable for driving in rough terrain and on surfaces with high
rolling resistance. Vehicles specified for off-road driving have Off-road mode and
it can be specified for other applications as well, for example forestry. Engine
response is soft (Euro 5 with XPI, Euro 6 engines) to promote smooth progress.
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The system strives to keep the clutch engaged as much as possible to avoid
interruptions in power delivery and traction. The number of gearchanges is
minimised by allowing the engine to work over a wider rev band. Gearchanges
are faster with a priority on gearchanging speed over comfort. Scania Active
Prediction is not operating, normal cruise control functionality applies.
Basic version of Scania Opticruise with limited functionality
Scania has also developed a simplified gearchanging system that limits the
possibilities for the driver to influence gearchanging. This shortcut to even better fuel
economy is requested in particular by large fleet owners, whose drivers frequently
drive different brands.
Scania Opticruise Basic for long-haulage:
• Fully automated Scania Opticruise (with automatic clutch).
• Standard and Economy mode.
• Scania Active Prediction (or Scania Ecocruise).
• Speed limiter set at 85 km/h or 80 km/h.
• Kickdown disabled.
• Manual gearchanging disabled (above 50 km/h).
Summary of performance options
Virtually all parameters can be set by a Scania workshop.
Standard Economy Power Off-road
Scania Opticruise x x x x
Scania Retarder x x x x
Scania Active Prediction
Scania Ecocruise (markets without topographical data)
1
x
x
x
x
Kickdown disabled Option x Option Option
Manual gearchanging disabled above X km/h Option Option
Speed limiter setting
Optional setting engaging automatically in Economy mode
Optional setting engaging automatically in Economy mode
89 km/h 89 km/h
85 km/h
80 km/h
89 km/h 89 km/h
Acceleration control x x
1 Scania Active Prediction can be disabled in Standard mode by a Scania workshop.
For more material, please visit the Scania Streamline pressroom at
www.scania.com/media.
For more information, please contact:
• Gunnar Nyfjäll, Product Manager Long-haulage, tel. +46 70 5382892,
email gunnar.nyfjall@scania.com.
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• Johan Björkegren, Product Information Powertrain, tel. +46 70 1615311,
email johan.bjorkegren@scania.com
• Per-Erik Nordström, Product Affairs, tel. +46 70 5535577,
email per-erik.nordstrom@scania.com
TECHNICAL DEEP-DIVE
Scania Opticruise functionality
– – – – – – – – – – – – – –
When introduced in 1995, Scania Opticruise was one of the first automated gearchanging systems in
the market and it took driver comfort and driver support to new levels. The functionality has been
continually refined ever since, turning Scania Opticruise into a comprehensive powertrain
management system.
Customers can choose according to preference between the fully automated version and the clutch
pedal version. The automatic clutch is electro-hydraulically operated, providing exceptional precision
and smoothness. The new performance modes can be specified on either version.
All gearchanging controls are integrated in the RH steering wheel lever, which also controls the
Scania Retarder (if fitted).
Ring switch
N Neutral
D Drive
R Reverse
Mode toggle
Mode toggle
– Standard mode
E Economy mode
P Power mode
O Off-road mode
Lever
+ Manual upchange
– Manual downchange
– (hold 1 s) Manoeuvring
A/M Automatic/manual
AUT switch
AUT Automatic retarder
via brake pedal
All driving modes are controlled by toggling the ring switch on the Opticruise lever and the mode
engaged is indicated in the central instrument.
Display examples
N Neutral
R Reverse
m Manoeuvring
Automatic
A Standard mode
AE Economy mode
AP Power mode
AO Off-road mode
Manual
M Standard mode
ME Economy mode
MP Power mode
MO Off-road mode
Ring switch
Lever
A/M switch
Used to select Neutral, Drive or Reverse. The spring-back toggle function switches
between performance modes and the modes available are indicated in the central
instrument.
Used to adjust gearchanges manually. Also controls progressive braking with the retarder,
if fitted.
Switches between automatic and manual gearchanging.
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AUT switch
Manoeuvring
Crawler gears
Rocking
Hill-hold
Launch control
Quick
forward/reverse
Multi-down
Floor switch
Clutch pedal
optional
In AUT position, the retarder, exhaust brake and downchanging are used to optimise
retardation when the brake pedal is depressed slightly. The application delay is bridged by
brake blending.
Engaged by pressing the Opticruise lever away from the steering wheel for a few seconds.
Provides ultra-smooth driving in all gears (including crawlers) and all modes. Shown with
an ‘m’ after the gear indication. Disengages automatically in high gear range.
With the 12+2-speed range-splitter gearbox, Scania Opticruise is the only system that
offers two extra-slow crawler ratios for ultra-slow progress in fully mechanical drive. The
crawlers are automatically used for starting, if necessary.
Enabled automatically if drive wheels are spinning faster than front wheels.
Function: The clutch disengages immediately when the accelerator is released. The driver
can press the accelerator repeatedly to get the vehicle ‘rocking’ and get moving again.
Rocking is disabled in Off-road mode to keep the clutch engaged as much as possible.
Hill-hold makes starting uphill simply a matter of accelerating away. Activate the hill-hold
switch, brake, start accelerating within 3 seconds after releasing the brake. Hill-hold is now
also available for more configurations, including construction and with drum brakes.
Normal starts are made by slipping in the automatic clutch slightly above idling speed. For
tough starts, for example on steep hills, or on very soft ground, the driver can trigger
higher starting revs by pushing down the accelerator fully. The clutch will then slip in at
around 1,000 revs.
Preselecting D or R with the rotary switch before stopping provides immediate
engagement when the vehicle stops. Useful for repetitive manoeuvres in D and R.
Changing down manually several steps (no limitation) before entering a steep hill leaves
the engine revving and the gearbox in neutral. The gear engages as soon as the speed is
right and the truck starts climbing at maximum power. If you know from experience, for
example, that the vehicle will climb in fourth gear, you can change to fourth beforehand
and just wait for the climb to start.
The small switch at the left on the floor engages the exhaust brake and triggers
downchanging for maximum engine braking without engaging the retarder.
Scania is the only manufacturer offering automated gearchanging with an optional clutch
pedal, a preferred choice for some operators.
Efficient heavy-haulage transmission
Scania Opticruise is a cost-effective solution for heavy-haulage transport at gross train weights of up
to 250 tonnes. Power transmission is purely mechanical, via Scania's normal automatic clutch and a
standard Scania overdrive gearbox. Mechanical drive is efficient and saves fuel. Thanks to the high
low-speed torque of Scania engines, the clutch is smoothly fed in slightly above tickover.
Cruise control strategies
Introduced in 2011, Scania Active Prediction pioneered a cruise control system that uses GPS data to
adapt the cruising speed to the topography. Scania customers have a choice of three types of cruise
control with different strategies:
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• The normal cruise control strives to maintain speed up the hill using the maximum torque band of
the engine.
• Scania Active Prediction uses GPS positioning and topographical map data to optimise the
speed going up-hill and downhill, saving 2-3 percent of fuel in hilly terrain.
• Scania Active Prediction uses a special, extra fuel-efficient strategy with Scania Opticruise in
Economy mode saving an additional 2 percent of fuel in hilly terrain.
Scania Ecocruise adapts the cruising speed to the topography by sensing the load on the engine.
Scania Ecocruise is only active in Economy mode and replaces Scania Active Prediction in countries
where topographical data is lacking. The fuel saving is up to 3 percent in hilly terrain.
Examples of performance modes and applications
Up to three performance modes can be specified on a truck. The table gives an indication of how the
modes can be used for different applications. All settings can be modified by a Scania workshop.
Performance mode
Standard Economy Power Off-road
Long-haulage Light x
1
x
Heavy x x x
Hilly x x x
Level x x
Construction Tipper x x x
Mixer x x x
Timber x x x x
Mining x x x
AWD x x x
Heavy-haulage x x x
Distribution x x
Municipal x x
Fire or rescue x x
1 Economy mode is most efficient in tough conditions – the hillier, the better.
p13303en opticruise with performance modes