# US 10,122,245 B2 · Engine-driven working machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,122,245 B2 - Document ID: US10122245B2 - Status: Granted - Kind: B2 - Application number: 15/454,482 - Filed: 2017-03-09 - Published: 2017-09-21 - Granted: 2018-11-06 - Earliest claimed: 2016-03-15 - Assignees: Honda Motor Co., Ltd. - Applicants: Honda Motor Co., Ltd. - Inventors: Hiroshi Koyama; Masashi Kai - Web page: https://patentgrep.com/patent/US10122245B2 ## CPC - H02K 9/06: with fans or impellers driven by the machine shaft - F01P 1/06: Arrangements for cooling other engine or machine parts - F01P 5/04: Pump-driving arrangements - F02B 63/04: for electric generators - H02K 7/1815: {structurally associated with reciprocating piston engines (general aspects of generating sets, e.g. housing, F02B63/04)} - H02K 11/0094: {Structural association with other electrical or electronic devices} - F01P 1/02: Arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders - F01P 2001/005: {Cooling engine rooms} - F02B 63/048: {Portable engine-generator combinations} - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28) - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) ## Abstract An engine-driven working machine capable of reducing an opening of an outer case to be small, and decreasing the number of components is provided. An engine-driven working machine 10 is a generator in which an inverter 27 is provided at a suction side of a cooling fan 17, and a fuel tank 25 is provided over the inverter 27. The generator 10 includes an intake port 36 that is formed in an outer case 12, and a first air guide passage 61 that is formed by a tank bottom portion 38 of the fuel tank 25. The intake port 36 is formed in a lower side part 12b of a tank front wall 37, in the outer case 12. The first air guide passage 61 is formed by the tank bottom portion 38 that is inclined with a falling gradient toward the inverter 27 from the intake port 36. ## Claims ### Claim 1 An engine-driven working machine in which a cooling fan is provided in an inside of an outer case, an inverter is provided at a suction side of the cooling fan, and a fuel tank is provided over the inverter, comprising: an intake port that is formed in a lower side part of a wall portion of the fuel tank, in the outer case; and a first air guide passage that is formed by a bottom portion of the fuel tank, the bottom portion of the fuel tank inclining with a falling gradient toward the inverter from the intake port, the engine-driven working machine further comprises: an operation section that is provided under the bottom portion and that includes an operation panel and equipment provided on the operation panel; and a cover that covers the equipment, the cover has a cover rear wall that is disposed behind the operation panel and a cover top portion that extends toward the operation panel from an upper end of the cover rear wall, the cover top portion is disposed with a space left with respect to the bottom portion, the inverter is disposed in a state where a radiating surface of the inverter faces the cover rear wall and the radiating surface is disposed with a space left with respect to the cover rear wall, the first air guide passage comprises the bottom portion of the fuel tank and the cover top portion and a second air guide passage that communicates with the first air guide passage comprises the cover rear wall and the radiating surface of the inverter. ### Claim 2 (depends on 1) The engine-driven working machine according to claim 1, wherein the fuel tank has a bend portion that is provided at the bottom portion of the fuel tank to form a part of the air guide passage, and guides cooling air that is guided to the air guide passage toward the inverter. ### Claim 3 (depends on 1) The engine-driven working machine according to claim 1, wherein the cover top portion of the cover is disposed in an inclined shape with a space left with respect to the bottom portion, and the air guide passage is formed by the bottom portion and the top portion. ### Claim 4 (depends on 2) The engine-driven working machine according to claim 2, wherein the cover top portion of the cover is disposed in an inclined shape with a space left with respect to the bottom portion, and the air guide passage is formed by the bottom portion and the top portion.