HI. Truck TKPH

Owned by iarmstrong
Last updated: Nov 02, 2023
2 min read

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.

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

  3. Select CAT785D from the list of the trucks.

  4. Select the General Properties tab.

    1. Change the Bridgestone constraint to 360.

    2. Leave the Michelin constraint at 10,000.

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

Changing TKPH limits

Checking the TKPH value on a given haul:

  1. Go to the Network tab.

  2. Show Return Route from Source to Destination.

  3. Open the Cycle Time Analysis tab.

  4. Scroll down to the TKPH values.

  5. Read the TKPH values for Axles.

  6. Go to the Truck Times tab.

  7. Compare the TKPH Delay Time of the edited truck (CAT785D) against others.

Read TKPH values for selected haul cycle

 

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

Michelin TKPH values require an ambient temperature to be specified. The default is 32°C in Setup > Operating Conditions > "Normal" operating condition.