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 Old 11-20-2010, 09:43 AM   #1
 
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Default CX7 AWD System

originally posted by superstretch18:


The CX-7 is equipped with Mazda’s new active torque split all-wheel drive system, which debuted on the MazdaSpeed6, featuring a more aggressive transfer of torque to the rear axle in accordance with driving conditions. This intelligent system achieves a satisfying balance between the interactive control over the vehicle that makes it particularly enjoyable to drive, and confident handling stability necessary for snowy, wet or other uncertain road surfaces/conditions; engine power and torque are faithfully and efficiently transferred to the road surface for maximum performance.

The active torque split AWD system uses real-time data input on steering angle, yaw rate, lateral G-force and engine status to determine road surface and driving conditions. The CX7’s onboard computer then automatically determines which of three different modes of front/rear torque distribution should be engaged: Normal, Sport, or Snow (for slippery surfaces). The active torque coupling mounted in front of the rear differential is electronically controlled in accordance with the data provided by the computer, adjusting front/rear wheel torque distribution between 100:0 and 50:50 to deliver optimum drive power to each axle. The result is that the most power and traction are made available under all conditions; positive acceleration and confident handling are provided regardless of constantly changing road conditions, as well as the ability to fully balance the vehicle in a turn by skilful use of the accelerator pedal.

Unlike many competitor offerings, the torque transfer system in the CX-7 seamlessly integrates the inherent stability of all-wheel drive; because the active torque coupling is controlled electronically, it can react to wheel slippage much more rapidly than conventional gear- or fluid-controlled systems. To ensure consistent power delivery under all weather and driving conditions, the Power Take-Off (PTO) system on the centre differential that distributes torque to the rear axle is fitted with its own liquid-cooled cooling system.

Once the computer has shifted into snow or sport mode it pre-loads the rear axle so you don't have to wait for slippage. As oppossed to the system in the 01-04 Tribute where the wheels had to actually slip before the AWD kicked in.

<On the TCS System>

The braking system works in synergy with the CX-7’s Dynamic Stability Control (DSC), incorporating a traction control system (TCS), to exhibit an outstanding level of active safety. The Dynamic Stability Control system is designed to activate when the vehicle is taking a turn too quickly for the road conditions. DSC compares the driver's intended direction (from the steering wheel angle) to the actual vehicle path; if the system senses
understeer or oversteer, it applies braking force, and reduces engine torque if required, to correct the situation.

Traction control systems generally come in one of two primary systems: an ABS-based system, or an engine management system. Both systems use the ABS wheel speed sensors to determine if there is wheel spin (wheel speed greater than vehicle speed). The CX-7 system uses engine management to reduce the amount of power output by reducing fuel, ignition timing and throttle position to reduce wheel spin. This system is superior to systems that use the ABS brakes to slow down the spinning wheel – ABS systems have a tendency to be very jarring in their operation and can overheat the brakes if used for extended periods of time. The CX-7’s traction control system (TCS) deals with the problem of the engine supplying too much power for road conditions right at the source; when wheel spin is detected, the TCS simply reduces the engine’s power output until the wheel spin stops.
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 Old 11-20-2010, 09:50 AM   #2
 
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Seems like a real improvement and the next step might be a real time AWD like is standard on Subarus.
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 Old 11-20-2010, 01:10 PM   #3
 
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Originally Posted by edwhayes View Post
Seems like a real improvement and the next step might be a real time AWD like is standard on Subarus.
i'd say active torque split is pretty much a "real time awd..."

in real time it transfers torque=power to whatever wheel needs it.
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 Old 12-26-2010, 11:03 PM   #4
 
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Proably a stupid question but is it even possible to turn a FWD CX7 into a AWD, dollars nonwithstanding? Would it require a entirely diffrent transaxil, CPU,wireing harness?
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 Old 12-28-2010, 02:12 AM   #5
 
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Its got the Tunnel and Exaust Routeing for it, I was looking at the Under Side of a FWD CX7 and Everything underneath the vehicle looks Identical to the AWD version, Literly looks like stuff is Missing like it was removed or stolen
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 Old 12-28-2010, 02:42 AM   #6
 
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anything is possible with the right amount of funding... but my custom exhaust goes through the tunnel area which increased my clearance but if i wanted to go awd, it would require a new exhaust also... but really, if you want awd, trade in your fwd and just buy an awd. prob a shitton easier...
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 Old 12-28-2010, 05:17 AM   #7
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There's absolutely not reason to retrofit a FWD CX7 with the AWD system since Mazda already did all that and has sold it for the same model years.
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 Old 12-29-2010, 12:18 AM   #8
 
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Originally Posted by Lex View Post
There's absolutely not reason to retrofit a FWD CX7 with the AWD system since Mazda already did all that and has sold it for the same model years.
Thats what I thought but when I purchaced my 2010 GT in pearl white this past July it was almost exactly what I wanted, minus the AWD, in fact I checked Mazdas invintory website while at the deaership and there were no CX7 AWD avalible anywhere near the Las Vegas area and only one CX9. The dealer told me theres just not a large demand for the 2K more expensive AWD model so not as many made and the ones that are are usually sent to dealers in the snow belt. Im very happy with my GT but was just wondering what might be involved. Proably not worth doing, but I was just curious what it would take to make my CX7 into "exactly" what I wanted. Thanks for the replies though.
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 Old 12-29-2010, 06:41 PM   #9
 
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Hindsight being 20/20 and all, but you couldn't have put in a custom order and waited?
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 Old 12-31-2010, 12:16 AM   #10
 
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Originally Posted by bscar View Post
Hindsight being 20/20 and all, but you couldn't have put in a custom order and waited?
The problem was I needed a car immidatly, this was back in July, I would have had to wait awhile for the 2011's to come out.
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 Old 01-02-2011, 11:34 AM   #11
 
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I <3 the CX7 AWD. It has saved my arse on several occassions.
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 Old 04-13-2011, 09:07 PM   #12
 
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Originally Posted by SpeedSixxx View Post
i'd say active torque split is pretty much a "real time awd..."

in real time it transfers torque=power to whatever wheel needs it.
LOL at this fancy explanation of a torsen lsd. Gotta love marketing BS
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