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  1. Join Date
    Oct 2002
    Posts
    1,790
    #31
    Nice info.

  2. Join Date
    Oct 2002
    Posts
    4,614
    #32
    here's the gritty on the Escape's 4wd mechanism...

    it is essentally an on-demand 4wd system that drives the front wheels only at all times until front wheel slippage occurs, in which case torque is routed to the rear wheels. this is the case in both the "4x4 Auto" and "4x4 on" modes, the axles are never locked together and torque is split 50:50 (and up to 0:100) between both axles only when a front wheel spins. The Escape does not have a center differential.

    here's the explanation from the July 2000 Car & Driver Escape review:

    "Contrary to what you'll be told by the dashboard markings, your Ford Outfitter salesperson, and even Ford's press materials, the Escape's Control Trac II system does not offer fully locked four-wheel drive. Rather, this on-demand all-wheel-drive setup only sends power to the rear axle when the front wheels slip. Here's how it works:

    In the "4x4 Auto" mode, 100 percent of the torque is sent to the front wheels until a wheel slips. When that happens, a rotary blade coupling (RBC) generates enough pressure to activate a multiplate clutch, like that found in an automatic transmission, which sends torque (as much as 100 percent of it) to the rear. At the heart of the RBC is a "fan" with three blades in a chamber filled with a silicone fluid like that used in viscous couplings. The fan is shaped kind of like the warning sign for radiation. When the front wheels slip, this fan spins through the fluid, heating and expanding it, which generates the pressure to activate the clutch. Then the clutch - not the viscous fluid - bears the burden of transmitting the torque.

    When set to "4x4 On", an electromagnetic device energizes a small clutch pack, locking a ball ramp to the input shaft. Now when the front wheels spin, they turn the ball ramp, which overrides the RBC and pressurizes the same multiplate clutch pack. In the "4x4 On" mode, the rear axle is engaged quicker and more securely. The front and rear axles are, however, never locked together, except during front-wheel slippage. That way, there is never and crabbing or binding in tight turns, and there's no need for a center differential.

    With no limited-slip differentials, it is possible - with opposite corners in full droop and airborne, for example - for an Escape to get totally stuck. And that's why this ain't a true four-ba-four."

  3. Join Date
    Oct 2002
    Posts
    22,658
    #33
    mbt,

    Hehehe. Pareho tayo ng reference materials ha. :D

    http://docotep.multiply.com/
    Need an Ambulance? We sell Zic Brand Oils and Lubricants. Please PM me.

  4. Join Date
    Nov 2002
    Posts
    2,059
    #34
    now im confused!!!! found this about the escape:

    The Control Trac™ II 4-wheel-drive system provides two driver-selectable modes. In “4x4 AUTO,” for most driving conditions, the vehicle operates in front-wheel drive and automatically proportions more torque to the rear axle when slippage occurs. The “4x4 ON” mode locks the front and rear axles together for enhanced traction in more extreme situations.

  5. Join Date
    Oct 2002
    Posts
    10,942
    #35
    Teka teka, para di tayo magkalituhan, ituloy na yung lakad sa Lahar country at isama ang Escape ni kiper! Ako na ang hahatak kung mabalaho man para magkaalaman na kung alin ang alin. :twisted:

  6. Join Date
    Nov 2002
    Posts
    6,753
    #36
    nice idea ungas.. hehehehehehe


    iba iba ata nababasa.. nagugugluhan nadin ako :roll:

  7. Join Date
    Nov 2002
    Posts
    2,059
    #37
    and this about the mazda tribute (twin of escape)

    Four wheel drive (4WD) mechanism Automatic on-demand 4WD with Rotary Blade Coupling (RBC) and push button lockable RBC for full-time 4WD (50:50 front/rear torque split

    The Rotary Blade Coupling System quickly activates when road conditions demand. The four-wheel-drive system automatically senses when the front wheels begin to slip and hydraulically transfers power to the rear wheels for improved traction. This seamless transfer of up to 50 percent of the engine's torque ensures that additional traction is on hand when the driver needs it.
    For added performance, an instrument panel-mounted switch, which activates an electro-magnetic coupling, allows the driver to lock the system in four-wheel-drive when driving on slippery roads.

  8. Join Date
    Oct 2002
    Posts
    4,614
    #38
    i'd go with the car & driver explanation... after all, they are aware that certain sources claim that "4x4 On" mode effectively functions as a center diff lock, and set out to correct the misconception.

  9. Join Date
    Jan 1970
    Posts
    219
    #39
    The RTC acts as the Central Diff Lock, its the same device that manipulates the torque split of ront and rear in All Wheel Drve Mode, Its all a matter of semantics.

    ALL'S WELL THAT ENDS WELL. :D

    Inuman Na!!!!

  10. Join Date
    Oct 2002
    Posts
    22,658
    #40
    ARB,

    automatically proportions
    Iyan ang key words diyan. A fully locked C/D will NEVER apportion power between the front and rear axles for the simple reason that it is LOCKED and has ceased to provide a 'differential' effect between the front and rear axles.

    Tama ang paliwanag ng Car & Driver. Thanks mbt.

    http://docotep.multiply.com/
    Need an Ambulance? We sell Zic Brand Oils and Lubricants. Please PM me.

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Ford Escape 4x4: Ok ba off-road capabilities nito?