# US 11,993,911 B2 · Working machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,993,911 B2 - Document ID: US11993911B2 - Status: Granted - Kind: B2 - Application number: 17/542,577 - Filed: 2021-12-06 - Published: 2022-03-24 - Granted: 2024-05-28 - Earliest claimed: 2019-06-28 - Assignees: Kubota Corporation - Applicants: Kubota Corporation - Inventors: Daiki Tamba; Yukifumi Yamanaka - Web page: https://patentgrep.com/patent/US11993911B2 ## CPC - E02F 3/3414: {the arms being pivoted at the rear of the vehicle chassis, e.g. skid steer loader} - E02F 9/0866: {Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment} - E02F 9/2075: {of the hybrid type (for vehicles in general B60W20/00)} - E02F 9/2246: {Control of prime movers, e.g. depending on the hydraulic load of work tools} - E02F 9/2253: {Controlling the travelling speed of vehicles, e.g. adjusting travelling speed according to implement loads, control of hydrostatic transmission} - E02F 9/2285: {Pilot-operated systems} - E02F 9/2289: {Closed circuit} - E02F 9/2296: {Systems with a variable displacement pump} - F02D 29/00: Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto - F02D 29/02: peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) ## Abstract A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a battery to store electricity generated by the motor/generator, an operation actuator to perform an operation of the machine body, a starting action determiner to determine, upon operation of the operation actuator, whether the operation corresponds to a starting action for the machine body, a first setter to set, if the starting action determiner determines that the operation of the operation actuator corresponds to the starting action, a torque of the motor/generator for the assisting action or the electricity generating action to a first torque, and a second setter to set, if the starting action determiner determines that the operation of the operation actuator does not correspond to the starting action, the torque for the assisting action or the electricity generating action to a second torque differing from the first torque set by the first setter. ## Claims ### Claim 1 A working machine comprising: a machine body; an engine on the machine body; a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine; a battery to store electricity generated by the motor/generator; an operation actuator for operation of the machine body; a starting action determiner to determine, upon operation of the operation actuator, whether the operation corresponds to a starting action for the machine body; a first setter to set, if the starting action determiner determines that the operation of the operation actuator corresponds to the starting action, a torque of the motor/generator for the assisting action or the electricity generating action to a first torque based on first control information indicating a relationship between (i) motoring torque for the assisting action and regenerative torque for the electricity generating action, and (ii) a rotation speed of the engine; and a second setter to set, if the starting action determiner determines that the operation of the operation actuator does not correspond to the starting action, the torque for the assisting action or the electricity generating action to a second torque differing from the first torque set by the first setter based on second control information indicating another relationship between (i) the motoring torque and the regenerative torque, and (ii) the rotation speed of the engine, the another relationship differing from the relationship indicated by the first control information. ### Claim 2 (depends on 1) The working machine according to claim 1, wherein the starting action determiner determines that the operation of the operation actuator corresponds to the starting action if an amount of change of the operation actuator is equal to or greater than a predetermined amount, and determines that the operation of the operation actuator does not correspond to the starting action if the amount of change of the operation actuator is less than the predetermined amount. ### Claim 3 (depends on 1) The working machine according to claim 1, wherein the machine body includes a traveling device to function using power from the engine and the motor/generator; and the operation actuator is a travel operation actuator for operation of the traveling device. ### Claim 4 (depends on 1) The working machine according to claim 1, wherein the starting action determiner determines whether or not the operation of the operation actuator corresponds to the starting action based on a decrease in the rotation speed of the engine in a case where the operation actuator is operated. ### Claim 5 (depends on 2) The working machine according to claim 2, wherein the starting action determiner determines that the operation of the operation actuator corresponds to the starting action if the amount of change of the operation actuator is equal to or greater than the predetermined amount and a decrease in the rotation speed of the engine is equal to or greater than a predetermined value.