US 12,352,010 B2
Control method of work machine, program, control system, and work machine
Hiroki Kabata, Fukuoka (JP); Katsuya Miyazaki, Fukuoka (JP); Kazuki Takeda, Fukuoka (JP); and Daisuke Kawaguchi, Fukuoka (JP)
Assigned to Yanmar Holdings Co., Ltd., Osaka (JP)
Filed by Yanmar Holdings Co., Ltd., Osaka (JP)
Filed on Apr. 26, 2024, as Appl. No. 18/648,100.
Claims priority of application No. 2023-074705 (JP), filed on Apr. 28, 2023.
Prior Publication US 2024/0360649 A1, Oct. 31, 2024
Int. Cl. E02F 9/20 (2006.01); E02F 9/08 (2006.01); E02F 9/22 (2006.01); F01N 9/00 (2006.01)
CPC E02F 9/2095 (2013.01) [E02F 9/0866 (2013.01); E02F 9/2066 (2013.01); E02F 9/2235 (2013.01); E02F 9/226 (2013.01); F01N 9/002 (2013.01); E02F 9/2285 (2013.01); E02F 9/2296 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A control method of a work machine in which a rotation number of a fan that takes outside air into an engine room accommodating an engine varies with a rotation number of the engine, comprising:
executing first control of regenerating a collecting filter unit that collects particulates contained in exhaust gas of the engine by a temperature rise of the exhaust gas;
when the work machine is changed from a steady state to a specific state, executing second control of decreasing an amount of working oil discharged from a hydraulic pump by driving of the engine; and,
when the first control and the second control are concurrently executed, executing third control of increasing the rotation number of the engine.
 
8. A non-transitory computer-readable medium comprising a program stored thereon for causing a computer to execute a control method of a work machine in which a rotation number of a fan that takes outside air into an engine room accommodating an engine varies with a rotation number of the engine, the program causing the computer to function as units for:
executing first control of regenerating a collecting filter unit that collects particulates contained in exhaust gas of the engine by a temperature rise of the exhaust gas;
when the work machine is changed from a steady state to a specific state, executing second control of decreasing an amount of working oil discharged from a hydraulic pump by driving of the engine; and,
when the first control and the second control are concurrently executed, executing third control of increasing the rotation number of the engine.
 
9. A control system of a work machine comprising:
an engine accommodated in an engine room;
a fan whose rotation number varies with a rotation number of the engine and that takes outside air into the engine room;
a collecting filter unit that collects particulates contained in exhaust gas of the engine;
a hydraulic pump that discharges working oil by driving of the engine; and
a control unit that controls the engine and a regulator, wherein the control unit
executes first control of regenerating the collecting filter unit by a temperature rise of the exhaust gas,
when the work machine is changed from a steady state to a specific state, executes second control of decreasing an amount of the working oil discharged, and,
when the first control and the second control are concurrently executed, executes third control of increasing the rotation number of the engine.