| Saab, the Swedish automaker, has
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| | In the process of take-off, the TTD is
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| developed the XWD "Cross Wheel Drive"
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| | being activated as the clutch plates are
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| system, with intention to optimize
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| | forced together under hydraulic pressure.
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| vehicle handling and stability in all
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| | In effect, the RDM becomes engaged. In
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| driving conditions. Currently, the system
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| | such process, detection of wheel slip
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| is being offered as an option in the 2008
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| | before the TTD activates is required,
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| Saab Turbo X and Aero versions of the 9-3
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| | making it a significant improvement in
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| Sport Sedan and SportCombi. It is being
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| | the technology.
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| partnered with a 280 hp (206 kW), 2.8 V6
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| | In open road cornering, Saab XWD offers
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| turbo engine that produces almost 15
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| | enhanced and more finely balanced chassis
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| percent more maximum torque of 400 Nm/295
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| | dynamics. The data from the vehicle's ABS
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| lbs.-ft.), to enhance the available
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| | ESP sensors are being utilized. And, the
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| traction.
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| | programming of the system permits the
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| The all-wheel drive system will be
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| | application of rear drive in balancing
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| available with either a six-speed manual
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| | both oversteer and understeer
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| or six-speed automatic transmission. It
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| | characteristics to optimize stability and
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| will provide to impressive features,
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| | roadholding.
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| namely: pre-emptive engagement of the
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| | For highway cruising, there is only about
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| rear wheels to optimize traction at
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| | 5 to 10 percent of the engine torque is
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| take-off; and an active rear limited-slip
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| | basically used in the rear wheels to
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| differential (eLSD) to allow variable
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| | provide a measure of greater stability
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| torque transfer between the rear wheels.
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| | and enhancement of fuel consumption.
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| The Cross Wheel Drive is a fully
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| | The eLSD holds the most significant role
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| automatic on-demand system. It could send
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| | in Saab XWD. It is the first application
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| up to 100 percent of engine torque
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| | of an electronically-controlled, rear
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| towards the front or rear wheels when
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| | limited slip differential in the segment.
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| necessary. Its sophisticated operation
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| | Along with RDM, the eLSD operates through
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| adds further sporty dimension to the
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| | pressurized clutch plates under a
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| driving experience with the new Saab
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| | principle same as with the larger TTD.
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| Turbo X and 9-3 Aero XWD. It produces
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| | The eLSD also provides the driver better
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| fine balancing of the drive torque
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| | control on hard cornering and high speed
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| between the front and rear axles that
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| | maneuver. It happens through the
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| raises the threshold where ESP throttle
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| | application of either more or less torque
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| and braking interventions are triggered;
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| | to the wheels, helping the rear follow
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| thus, provides more scope for intimate
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| | the direction of the front wheels.
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| driver involvement.
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| | Without requiring 'outside' intervention
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| The state-of-the art all-wheel drive
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| | from electronic stability aides and
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| system is being dominated by its own
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| | quality Saab struts, the vehicle can be
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| electronic control unit that works with
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| | kept balanced and be tightly controlled.
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| the engine, transmission and ABS/ESP
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| | Fitment of a new rear sub-frame, in the
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| control modules. In the front
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| | process of installing the Saab XWD, is
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| final-drive, the hardware comes with a
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| | required to carry the RDM, revised rear
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| Power Take-off Unit (PTU), which
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| | suspension geometry and new wheel hubs
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| transmits engine torque through a
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| | for the drive shafts. Wheelbase and rear
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| prop-shaft in the Rear Drive Module
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| | track dimensions are kept unaltered.
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| (RDM). It works with wet, multi-plate
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| | Currently, Saab, as a division of General
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| clutch units from Haldex, namely a Torque
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| | Motors Corp. Saab Automobile USA, is
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| Transfer Device (TTD) and an
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| | providing premium automobiles for Saab
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| electronically-controlled Limited Slip
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| | Automobile AB, Sweden.
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| Differential (eLSD).
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