Method for calibrating a characteristic diagram ofa work machine and work machine

A method of calibrating a characteristic diagram (13) of a working machine (2), the characteristic diagram (13) having a brake pedal characteristic (14;

• 16) of a brake system (11) and at least one clutch characteristic (15;
• 17) of a drive input clutch (5) which, in a calibrated condition, have a nominal relationship to one another, the method comprising:
• determining a wheel-side drive output torque,
• determining an actual brake pedal characteristic (16) with reference to the drive output torque,
• determining an actual relationship that deviates from the nominal relationship by comparing the actual brake pedal characteristic (16) determined with a nominal brake pedal characteristic (14), and
• calibrating the brake pedal characteristic (14;
• 16) or the clutch characteristic (15;
• 17) in such manner that the actual relationship corresponds to the nominal relationship.

A working machine (2) with a drive unit (3), a hydrodynamic torque converter (4), a drive input clutch (5), a transmission (9), a brake system (11), and an electronic control unit (12) in which a characteristic diagram (13) is stored, which diagram includes a brake pedal characteristic (14, 16) of the brake system (11) and at least one clutch characteristic (15, 17) of the drive input clutch (5) which, in a calibrated condition, have a nominal relationship to one another, the electronic control unit (12) is designed to carry out a method of calibrating the characteristic diagram (13) including:

• determining a wheel-side drive output torque;
• determining an actual brake pedal characteristic (16) with reference to the drive output torque;
• determining an actual relationship that deviates from the nominal relationship by comparing the actual brake pedal characteristic (16), determined with a nominal brake pedal characteristic (14);
• and
• calibrating the brake pedal characteristic (14;
• 16) or the clutch characteristic (15;
• 17) in such manner that the actual relationship corresponds to the nominal relationship.