Work machine, control system for work machine, and control method for work machine

A work machine including a tank which stores liquid, comprising:

• a calculation unit configured to obtain a difference between an amount of the liquid inside the tank acquired at a first timing when a key switch of the work machine is turned OFF and an amount of the liquid inside the tank acquired at a second timing after a timing when the key switch is turned ON for a first time after the key switch was turned OFF;
• a notification unit configured to notify abnormality information indicating occurrence of abnormal reduction of the liquid inside the tank in a case where an operating time of the work machine during a period from the first timing to the second timing is equal to or smaller than a first threshold and also the difference is equal to or larger than a second threshold, and further configured not to notify the abnormality information in a case where the operating time is larger than a first threshold;
• a position detector configured to detect a position of the work machine;
• and
• a communication device configured to communicate with outside of the work machine,
• wherein the notification unit notifies the outside of the work machine of the abnormality information and the positional information via the communication device.

A control system for a work machine, comprising:

• a work machine including
• a tank configured to store liquid,
• a calculation unit configured to obtain a difference between an amount of the liquid inside the tank acquired at a first timing and an amount of the liquid inside the tank acquired at a second timing after the first timing,
• a first notification unit configured to notify abnormality information indicating occurrence of abnormal reduction of the liquid inside the tank in a case where an operating time of the work machine from the first timing to the second timing is equal to or smaller than a first threshold and the difference is equal to and larger than a second threshold, and also configured not to notify the abnormality information in a case where the operating time is larger than a first threshold, and
• a first communication device configured to transmit the abnormality information notified by the notification unit;
• and
• a control device including
• a second communication device configured to receive the abnormality information transmitted from the first communication device, and
• a second notification unit configured to notify the abnormality information received by the second communication device.

A control method for a work machine including a tank which stores liquid, comprising:

• obtaining a difference between an amount of the liquid inside the tank acquired at a first timing and an amount of the liquid inside the tank acquired at a second timing after the first timing;
• notifying abnormality information indicating occurrence of abnormal reduction of the liquid inside the tank in a case where an operating time of the work machine during a period from the first timing to the second timing is equal to or smaller than a first threshold and the difference is equal to or larger than a second threshold;
• and
• not notifying the abnormality information in a case where the operating time of the work machine is larger than a first threshold.