System and method for evaluating performance of work machine

A system for evaluating performance of a work machine including an engine and a torque converter connected to the engine, the system comprising:

• a target torque acquisition unit configured to acquire a target output torque of the engine;
• an actual torque acquisition unit configured to acquire an input torque to the torque converter as an actual output torque of the engine;
• a torque correction unit configured to
• acquire a change amount of a predetermined correction parameter indicating an operating state of the torque converter and
• correct the actual output torque based on the change amount;
• and
• a torque ratio calculation unit configured to calculate a ratio between the target output torque and the corrected actual output torque as a torque ratio in order to evaluate the performance.

A method for evaluating performance of a work machine including an engine, the method comprising:

• acquiring a target output torque of the engine;
• acquiring an actual output torque of the engine;
• acquiring a first change amount of a first correction parameter in order to change a target output torque of the engine and correcting the actual output torque based on the first change amount;
• and
• calculating a ratio between the target output torque and the corrected actual output torque as a torque ratio in order to evaluate the performance.

A method for evaluating performance of a work machine including an engine and a torque converter connected to the engine, the method comprising:

• acquiring a target output torque of the engine;
• acquiring an input torque to the torque converter as an actual output torque of the engine;
• acquiring a change amount of a predetermined correction parameter indicating an operating state of the torque converter and correcting the actual output torque based on the change amount;
• and
• calculating a ratio between the target output torque and the corrected actual output torque as a torque ratio in order to evaluate the performance.