problems to use Arduino to brake the wheels

I am doing anti-lock braking system in electric car, however, one big question makes me so confused. how to use a programming to lock the wheels, so that the car will have braking performance by giving power (not like regenerative braking)?

thanks you..and...it is very urgent....TT...

Try here:
http://arduino.cc/forum/index.php/topic,59342.0.html

Thanks...^^