Traction controlling apparatus for a multi-axle vehicle

A traction controlling apparatus for a multi-axle vehicle having two sides, a front section and a rear section, a front axle connected to the front section of the vehicle, a pair of front wheels connected with the front axle, a driving axle connected with the rear section of the vehicle, a pair of driving wheels connected with the rear axles, a follower axle connected with the rear section of the vehicle and located adjacent and behind the driving axle, a pair of follower wheels connected with the follower axle, a plurality of wheel cylinders, wherein one each of the plurality of wheel cylinders being in correspondence with each wheel and being connected with the axle associated with the corresponding wheel, a plurality of brakes, wherein one each of the plurality of brakes being in correspondence with each wheel cylinder, the traction controlling apparatus further comprising:

• a first air master cylinder commonly connected with a first pair of hydraulic lines, wherein a first hydraulic line of the first pair supplies a hydraulic braking pressure to the wheel cylinder corresponding to the driving wheel on one side of the vehicle and a second hydraulic line of the first pair for supplying a hydraulic braking pressure to the wheel cylinder corresponding with the follower wheel on the one side of the vehicle;
• a second air master cylinder commonly connected with a second pair of hydraulic lines, wherein a first hydraulic line of the second pair supplies a hydraulic braking pressure to the wheel cylinder of the driving wheel on the other side opposite the one side of the vehicle and a second hydraulic line of the second pair supplies a hydraulic braking pressure to the wheel cylinder of the follower wheel on the other side of the vehicle;
• a traction control valve connected with an air pressure supply source for jointly supplying an air pressure to each of the air master cylinders, wherein each air master cylinder transforms the supplied air pressure into the hydraulic braking pressure of the first pair and second pair of hydraulic lines;
• a pair of air pressure control type cut valves, one each being disposed in each of the second hydraulic lines, for opening and closing the second hydraulic lines;
• and
• a third pair of hydraulic lines, one each of the third pair of hydraulic lines connecting the traction control valve to one each of the air pressure control type cut valves, wherein the air pressure supplied to the pair of air master cylinders is jointly supplied to the air pressure control type cut valves.