A general abs question

[Millsy_666]

I have never seen a proper ABS test done in my life, that Bloke is just grabbing A handful of brake and locking it up, he should be just pulling up the bike and showing the different distance in stopping between the 2 bikes, then he should do it in the dry and you would fine a good rider would pull the non ABS bike up quicker, I think its important that riders get to know what weight transfer feels like when you apply the brakes hard, without ABS you get to feel the unstable feel while the weight transfers from the rear of the bike to the front wheel and that helps you find the Maximum amount of brake pressure to apply, ABS takes that feeling away.

You cant become one with your bike if the bike is making all the decisions

Yes on a track with multiple tries and good conditions an experienced rider can sometimes pull up faster without abs, and a pro may do it more often than not, but when your flying down the highway, or cursing through town and a car suddenly pulls out in front of you... I'll put my money on the ABS every time and that's what it's there for cos we can't always be in the best conditions and the most ready state of mind. and besides that your talking a extra stopping distance of 1-3 meters (depending on starting speed) i think it's better to stop consistently at a distance of say 20m every time with ABS than to sometimes stop at 19m or 21m excreta without it.

 

[dirtsailor]

Here is some info i found in my Service manual for my Super Tenere regarding the subject: ::024::

OUTLINE OF THE UBS This model is equipped with a unified brake system (UBS) that operates the rear brake when the brake lever is squeezed. When the brake lever is squeezed, the rear brake force is controlled electronically according to the brake lever input (hydraulic pressure) and vehicle speed (deceleration). During tandem riding or when the vehicle is carrying a heavy load, the rear brake force generated by the UBS is higher to increase vehicle stability. If the brake pedal is operated before the brake lever, the UBS will not operate. However, if the brake pedal is operated while the UBS is operating, the UBS will continue to operate until the brake pedal input exceeds the rear brake force generated by the UBS. Then, the rear braking will switch to rider control. TIP If the brakes are operated while the vehicle is traveling at low speeds, the UBS will only generate a small brake force.

and here is ABS:

OUTLINE OF THE ABS 1. This model is equipped with the latest, advanced type of ABS, which has improved feeling during operation and smoother braking than previous ABS brakes. The ABS ECU detects the hydraulic pressure using the pressure sensors and controls the pressure linearly using continuously variable adjustments to obtain the appropriate pressure when the wheels have a tendency to lock or according to the operation input (hydraulic pressure) from the brake lever or brake pedal. 2. If the wheels have a tendency to lock during brake lever input, brake pedal input, or UBS control, the ABS will operate. 3. The hydraulic unit assembly, which is the main component of the ABS, is centrally located on the vehicle to increase mass centralization.

and here is some technical stuff regarding ABS ::002::

Wheel slip and hydraulic control/ The ABS ECU calculates the wheel speed of each wheel according to the rotation signal received from the front and rear wheel sensors. In addition, the ABS ECU calculates the vehicle chassis speed and the rate of speed reduction based on the wheel speed values. The difference between the chassis speed and the wheel speed calculated in the slip ratio formula is equal to the wheel slip. When the wheel speed is suddenly reduced, the wheel has a tendency to lock. When the wheel slip and the wheel speed reduction rate exceed the preset values, the ABS ECU determines that the wheel has a tendency to lock. If the slip is large and the wheel has a tendency to lock (point “A” in the following figure), the ABS ECU reduces the hydraulic pressure in the brake caliper. Once the ABS ECU determines that the tendency of the wheel to lock has diminished after the hydraulic pressure is reduced, it increases the hydraulic pressure (point “B” in the following figure). The hydraulic pressure is initially increased quickly, and then it is increased gradually.

::004::