# US 2020/0287489 A1 · Engine generator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0287489 A1 - Document ID: US20200287489A1 - Status: Published application - Kind: A1 - Application number: 16/884,277 - Filed: 2020-05-27 - Published: 2020-09-10 - Earliest claimed: 2017-11-29 - Assignees: Honda Motor Co., Ltd. - Applicants: Honda Motor Co., Ltd. - Inventors: Yoichi Yamamura; Kyosuke Taniguchi; Wataru Fukumoto - Web page: https://patentgrep.com/patent/US20200287489A1 ## CPC - H02P 9/008: {wherein the generator is controlled by the requirements of the prime mover} - F01B 23/10: Adaptations for driving, or combinations with, electric generators - F02B 63/04: for electric generators - F02D 29/06: peculiar to engines driving electric generators - F02D 41/08: for idling (F02D41/06, F02D41/16 take precedence) - F02D 43/00: Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment - F02N 3/02: having pull-cords - F02P 5/15: Digital data processing - H02P 9/04: Control effected upon non-electric prime mover and dependent upon electric output value of the generator - H02P 2101/25: for combustion engines - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - F01B: MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES (of rotary-piston or oscillating-piston type F01C; of non-positive-displacement type F01D; internal-combustion engines F02B; combustion-product engine plants F02G; machines or engines, other than of positive-displacement type, for liquids F03B; positive-displacement engines driven by liquids F03C; wind motors F03D; positive-displacement machines for liquids F04B; rotary-piston, or oscillating-piston, positive-displacement machines for liquids F04C) - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - 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) - F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR - F02P: IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES ({anti-pollution means for internal-combustion engines F02B17/00}; specially adapted for rotary-piston or oscillating-piston engines F02B53/12; {ignition of gas turbine plants F02C7/26; ignition of jet propulsion plants F02K9/95; starting of combustion engines F02N9/00}; ignition of combustion apparatus in general, glowing plugs F23Q; measuring of physical variables in general G01; controlling in general G05; data processing in general G06; electrical components in general see Section H; {ignition coils H01F38/12}; sparking plugs H01T13/00) ## Abstract A switch can connect or disconnect a generator and a supply unit. A control unit controls an engine in one of a plurality of control states including a power generation state, a first standby state and a second standby state. When an acceptance unit accepts a switching instruction from the first standby state to the second standby state, the control unit controls the switch to disconnect the generator and the supply unit, and reduces the engine speed of the engine from an engine speed in the first standby state to an engine speed in the second standby state. ## Claims ### Claim 1 An engine generator comprising: an engine; a generator driven by the engine to generate power; a supply unit configured to supply the power generated by the generator to an external load; a switch configured to connect or disconnect the generator and the supply unit; a control unit configured to control the engine in one of a plurality of control states including a power generation state in which the generator and the supply unit are connected by the switch, and an engine speed, an air fuel ratio, and an advance of an ignition timing are controlled in accordance with the external load, a first standby state in which the generator and the supply unit are connected by the switch, and power is not supplied to the external load, and a second standby state in which the generator and the supply unit are disconnected by the switch; an acceptance unit configured to accept a switching instruction between the first standby state and the second standby state, wherein when the acceptance unit accepts a switching instruction from the first standby state to the second standby state, the control unit controls the switch to disconnect the generator and the supply unit, and reduces the engine speed of the engine from an engine speed in the first standby state to an engine speed in the second standby state. ### Claim 2 (depends on 1) The engine generator according to claim 1, wherein the engine speed in the second standby state is an engine speed at which the engine does not stall in a state in which the power is not supplied to the external load. ### Claim 3 (depends on 2) The engine generator according to claim 2, wherein the engine speed in the first standby state is an engine speed at which the engine does not stall in a state in which an external load equal to a rated load of the generator is connected to the supply unit. ### Claim 4 (depends on 1) The engine generator according to claim 1, wherein when the acceptance unit accepts the switching instruction from the first standby state to the second standby state, the control unit decreases the advance of the ignition timing of the engine. ### Claim 5 (depends on 1) The engine generator according to claim 1, wherein when the acceptance unit accepts the switching instruction from the first standby state to the second standby state, the control unit raises the air fuel ratio of the engine. ### Claim 6 (depends on 1) The engine generator according to claim 1, wherein when the acceptance unit accepts the switching instruction from the second standby state to the first standby state, the control unit transitions the control state of the engine from the second standby state to the first standby state. ### Claim 7 (depends on 6) The engine generator according to claim 6, wherein when the transition from the second standby state to the first standby state is completed, the control unit connects the generator and the supply unit by the switch. ### Claim 8 (depends on 1) The engine generator according to claim 1, further comprising a recoil starter configured to start the engine. ### Claim 9 (depends on 1) The engine generator according to claim 1, wherein the acceptance unit includes a receiver configured to accept an instruction transmitted from one of a remote controller and a communication device. ### Claim 10 (depends on 1) The engine generator according to claim 1, wherein the acceptance unit includes a switch configured to switch between the first standby state and the second standby state. ### Claim 11 (depends on 10) The engine generator according to claim 10, wherein the switch configured to switch between the first standby state and the second standby state is a switch provided in an outlet receptacle of the supply unit and turned on/off in accordance with insertion/removal of an outlet plug into/from the outlet receptacle. ### Claim 12 (depends on 1) The engine generator according to claim 1, wherein the engine includes a throttle configured to control inflow amounts of air and fuel to the engine, and the control unit adjusts the throttle, thereby controlling the engine speed. ### Claim 13 (depends on 1) The engine generator according to claim 1, wherein the engine further includes a fuel injection device, and the control unit adjusts an injection amount of fuel in the fuel injection device, thereby controlling the air fuel ratio of the engine. ### Claim 14 (depends on 1) The engine generator according to claim 1, wherein the engine further includes a crank angle sensor configured to detect a crank angle, and the control unit decides the ignition timing based on the crank angle detected by the crank angle sensor, and adjusts the advance of the ignition timing in accordance with the control state of the engine.