Patent ID: 9324200
Filing Date: 2016-04-26
CPC Classification: B60Q,E02F,G01F,G07C,G08B

Claim Text:
1. A work machine including a tank which stores liquid, the work machine comprising: a calculation unit configured to obtain a liquid amount difference which is a difference between an amount of the liquid inside the tank detected at a first timing when the work machine stops operating and an amount of the liquid inside the tank detected at a second timing after a timing when a key switch of the work machine is turned ON for a first time after the first timing, wherein in a case where the calculation unit is not able to acquire the amount of the liquid due to malfunction occurred in an in-vehicle signal line after the first timing, the second timing is a timing when the calculation unit comes to be able to acquire the amount of the liquid after the malfunction of the in-vehicle signal line is resolved; and 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 difference 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 liquid amount 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 difference of the work machine during the period from the first timing to the second timing is larger than the first threshold and also the liquid amount difference is equal to or larger than the second threshold.