The Science of Driving

[tacotoy]

yaw control is more for racing...... controller senses weight shift and has a weight that moves over to the opposite side of the car to keep it on the ground

[crappled]

but you wont find it in any actual racecar lol.... weird =)

[tacotoy]

i know... i keep hoping that the next car i buy on GT3 will have that as an option...... and thats as far as i think yaw control would go in relation to the real world lol. no further than a video game

[crappled]

well alot of lambo's have it, the new gt3 will have it... alot of bmw's newer m's are gonna have it...

[Lysmachia]

Gotta add my scientist :2cents:

Yaw is only 1 part of the 3 dimenional motion an oject can take: Imagine an airplane.
If it pushes its nose forward (down) - that is its pitch
If it lowers one wing and the other moves higher - that is roll
And if the plane moves its head to the left and then its tail will swing right, that's yaw

Everyone asleep now? Good. I'll go call layton and get a second opinion... :D

[MuddButt]

If Molly's BMW is like mine it has DSC ...Dynamic Stability Control, a feature that BMW uses in all of its vehicles ...its fucking tight. BMW HAS HAD PITCH AND YAW CONTROL FEATURES IN THEIR VEHICLES FOR YEARS.

A brief tutorial:

Dynamic Stability Control (DSC) is a further development of the Anti-lock Brake System (ABS) and Automatic Stability Control and Traction (ASC+T) slip control systems.

While the latter takes the longitudinal forces occurring in straight-ahead running into account, DSC additionally registers and analyses lateral dynamic forces to ensure directional stability.

This means that also - and particularly - in cornering at high speeds, unstable vehicle states such as oversteering or understeering are effectively countered and vehicle stability and road safety are enhanced.

Not only when starting, driving in a straight path or braking does the vehicle remain entirely stable - this feature particularly provides maximum stability when taking bends.

The steering wheel movement, vehicle speed, transverse acceleration and yaw are used by DSC to register imminent instability when taking a bend at speed.
DSC then intervenes via the engine management system, reducing drive torque, activating wheel brakes when necessary and thus keeping the vehicle stable.
All this happens within milliseconds - more quickly and precisely than a driver could ever react.
Your benefits :

With DSC there is a significant reduction in the risk of skidding during sudden swerve manoeuvres or on slippery bends, on cobblestones or similar road situations.
In combination with the basic functions of ABS and ASC+T, there is optimum use of road surface friction (wheel grip).
Function in detail :

Whilst ABS and ASC+T take account of longitudinal forces when the vehicle is travelling in a straight path, DSC also monitors and regulates the lateral forces.

The DSC computer constantly calculates an ideal driving condition that is compared with the current status. If the vehicle oversteers or understeers, the calculated ideal deviates from the measured status. DSC then intervenes within a few milliseconds via the engine management system by influencing the engine torque and activating brakes on individual wheels where necessary.

The system thus counteracts unstable vehicle behaviour in normal driving situations, e.g. when accelerating, braking, rolling or under sudden load changes (when changing gear, swerving or suddenly releasing the throttle).

These reactions translate into so-called "oversteer" (rear of car brakes into a slide towards the outside of the curve) and "understeer" (front of car pushes towards the outside of the curve).

In the case of oversteer, DSC would brake the "outer" rear (and, if needed, also the "outer" front) wheel in order to correct the vehicle's stance by generating a counter-momentum to neutralise the oversteer. In the new 3 Series, the braking effect is applied at both "outer" wheels.

Similarly, in the case of understeer DSC would act upon the "inner" rear (and, if needed, front) wheel to regain vehicle stability. In the new 3 Series, the braking effect is applied at both "inner" wheels.

These regulatory interventions are effected by the DSC electronic and hydraulic systems more rapidly and precisely than a driver's reactions, and, moreover, they are hardly felt by the vehicle's occupants.

Components :

DSC makes use of the ABS wheel-speed sensors, and also of the following additional components :

steering angle sensor to detect the driver's chosen path
lateral-acceleration sensor to define the lateral forces which must be transmitted to the road by the tyres
rate-of-turn sensor to define the vehicle's degree of rotary movement
brake-pressure sensor to define the longitudinal forces acting between tyres and road surface under braking

[MuddButt]

Oh ...and when they refer to the "New" 3-Series ....its not the new bodystyle ....it's mine.

This is an older article....and my car is fucking sweet.....and for sale ...btw.

[Lysmachia]

So that'll explain why Darrick, Josh and I have been taking corners in canyons at 90 and while we get some nice 4 wheel skids thet are very controlled....(DSC to the rescue) :D Yeah I love my beemer 2 but I think I better move this conversation to a new thread called the science of driving. Cool?

While we are at it post a pic of your sexy girl.... or the sexy girl you'd most like to drive *grin*

http://im1.shutterfly.com/procserv/47b5d606b3127cce93e71ea15a1e00000036108AbNWLJszZOA

http://im1.shutterfly.com/procserv/47b5d732b3127cce945ace5f7ca600000016108AbNWLJszZOA

[crappled]

i meant to say, the new m's will have which functions you want on and off...
like there will be a seperate yaw control button lol