HI. Truck TKPH

TKPH calculations are used to keep the tyre temperature within safe limits. This is calculated as a function of payload and distance travelled. The formulas used to calculate the TKPH value can be found in the tyres manufactures (Bridgestone and Michelin) handbooks.

Enter TKPH Constraint

Each truck type will have a different TKPH limit depending upon the tyres on the machine.

To create TKPH constraints:

1. Look up the tyre TKPH limits from the tyre manufacturer. In this example, we will be running CAT 785D trucks with Bridgestone 33.00R51 VRLS E1A tyres, with a TKPH rating of 603.

2. Navigate to the sample data \NodesVersion folder.

3. Open SampleModelWithNodes.hinf

4. Go to Setup tab and choose Limits step from a list.

5. Select CAT785D from the list of the trucks.

6. Select the TKPH Limits from the categories

   1. Change the Bridgestone constraint to 360.

   2. Leave the Michelin constraint at 10,000

Open

Change TKPH for Bridgestone tyres to 360

Whenever the tyre TKPH rises above 360, Haul Infinity will implement a TKPH delay in the cycle time for the tyres to cool down.

To see the TKPH value on a given haul:

1. Go to the Network tab.

2. Find the source node P1\R4\1030 on the floor of the pit.

3. Right click on the node and go to Show Path To > Loaded > LiftEntry > WD1\R4\End.

4. Open the Cycle Time Analysis tab.

5. Scroll down to the TKPH values.

6. Read the TKPH values for Axles.

Open

Read TKPH values for selected node

Whenever these values rise above a TKPH constraint, then a TKPH delay will be implemented.