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Wat beinvloedt het Four-C systeem allemaal?
Geplaatst: 20.09.2008 - 11:20
door Rene68
Op mijn V70 heb ik het FOUR-C systeem genomen. Geweldig systeem, kan niet anders zeggen. Het verschil tussen Comfort, Sport en Advanced zijn overduidelijk te merken.
Maar wat ik mij nou afvroeg, doet FOUR-C nog iets met de GT? Op zich zou het logisch zijn dat wanneer je in de Sport of Advanced stand rijdt, de GT ook sportiever zou schakelen dan bij de Comfort stand. Ik moet bekennen dat ik eigenlijk wel weet dat het niet zo is maar misschien vergis ik mij wel.
Weet iemand hier iets meer te vertellen over wat FOUR-C, buiten demping, beïnvloed?
Geplaatst: 13.10.2008 - 12:19
door bart71298
Nee, alleen demping. Vandaar de derde van de vier C's: Chassis.
The Continuously Controlled Chassis Concept (Four-C)
What differentiates the Volvo Four-C from other chassis concepts is its ability to process enormous amounts of information. The Four-C system has a high performance control unit developed and manufactured by Motorola. Strategically placed sensors on the chassis measure the longitudinal, lateral, and vertical acceleration of the car relative to driving conditions.
There are sensors to measure:
* the rotational speed and vertical movement of each wheel
* steering wheel deflection and velocity
* cornering (yaw rate)
* engine torque (calculated)
* braking interventions by ABS and DSTC
In much the same manner as the human brain, the sensory information is received and immediately acted upon. The Four-C's sophisticated microprocessor computes the motions of the car to adapt the hardness of the shock absorbers. The result is that the car is always fluid with the surface of the road.
While the S60 R negotiates varying terrain, the shock absorbers are updated with new information 500 times a second. In essence, the system makes adjustments continuously, and instantaneously.
The Four-C is a first in the world of cars. To develop this totally new technology Volvo collaborated with high-tech system developer Öhlins Racing AB and shock absorber manufacturer Monroe (both leaders in their fields).
The computerized electrical system of the Volvo S60 R, known as Multiplex, also sends information to the Four-C system. Under severe braking for instance, the Four-C system receive the braking information a few milliseconds before the brake pads touch the brake disc. By then the Four-C microprocessor has computed how much the braking will cause the front end of the car to dive, and uses this information to set the shock absorbers to maximize control and tire grip.
When the car is accelerating, Four-C receives the corresponding information from the longitudinal acceleration sensor. Similarly, the system passes on information about a sharp deflection of the steering wheel a few milliseconds before the car actually changes direction.
So Four-C can predict what is going to happen, making the pun in its name (foresee) highly appropriate.
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