Work machine, control method thereof, and supply system

A control method of a work machine including:

• an engine;
• a reserving chamber configured to reserve lubricating oil to be supplied to the engine;
• a channel forming member configured to form a channel of the lubricating oil from the reserving chamber to the engine;
• a press-feed unit configured to press-feed the lubricating oil reserved in the reserving chamber to the engine via the channel forming member;
• a float configured to float on an oil surface of the lubricating oil reserved in the reserving chamber;
• and
• a sensor provided in the reserving chamber and configured to detect the float,
• the method comprising:
• determining a tilt state of the reserving chamber based on a detection result of the sensor;
• and
• controlling the press-feed unit based on a determination result in the determining, wherein
• the detection result of the sensor includes a distance between the float and the sensor,
• the determining determines the tilt state of the reserving chamber based on the distance,
• the work machine further comprises a storage unit configured to store the detection result of the sensor at a predetermined period, and
• the determining determines the tilt state of the reserving chamber by comparing a current detection result of the sensor with a previous detection result of the sensor stored in the storage unit.

A supply system mountable in a work machine and configured to supply lubricating oil to an engine of the work machine, comprising:

• a reserving chamber configured to reserve lubricating oil to be supplied to the engine;
• a channel forming member configured to form a channel of the lubricating oil from the reserving chamber to the engine;
• a press-feed unit configured to press-feed the lubricating oil reserved in the reserving chamber to the engine via the channel forming member;
• a float configured to float on an oil surface of the lubricating oil reserved in the reserving chamber;
• a sensor provided in the reserving chamber and configured to detect the float;
• a memory storing a program;
• one or more processors which, by executing the program, function as:
• a determination unit configured to determine a tilt state of the reserving chamber based on a detection result of the sensor;
• and
• a control unit configured to control the press-feed unit based on a determination result of the determination unit, wherein
• the detection result of the sensor includes a distance between the float and the sensor,
• the determination unit determines the tilt state of the reserving chamber based on the distance,
• the work machine further comprises a storage unit configured to store the detection result of the sensor at a predetermined period, and
• the determination unit determines the tilt state of the reserving chamber by comparing a current detection result of the sensor with a previous detection result of the sensor stored in the storage unit.