# US 9,518,373 B1 · Construction machine with engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,518,373 B1 - Document ID: US9518373B1 - Status: Granted - Kind: B1 - Application number: 15/139,378 - Filed: 2016-04-27 - Published: 2016-12-08 - Granted: 2016-12-13 - Earliest claimed: 2015-06-08 - Assignees: Kobelco Construction Machinery Co., Ltd. - Applicants: Kobelco Construction Machinery Co., Ltd. - Inventors: Kazuhiro Ueda; Seiichi Onishi - Web page: https://patentgrep.com/patent/US9518373B1 ## CPC - E02F 9/0866: {Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment} - B60K 11/06: with air cooling - B62D 25/082: {Engine compartments} - B62D 25/12: Parts or details thereof (locks E05B, {E05B83/16; devices for holding open E05C17/00, e.g. while carrying oversize objects E05C17/042}; hinges E05D; counterbalancing means E05F; {checks, stops, buffers E05F5/00; } springs, {e.g. pneumatic springs} F16F) - E02F 9/0891: {Lids or bonnets or doors or details thereof (doors for cabins E02F9/163 takes precedence; for motor vehicles B62D25/10)} - F01P 1/06: Arrangements for cooling other engine or machine parts - B60Y 2200/412: Excavators - F01P 2001/005: {Cooling engine rooms} - F01P 2060/16: Outlet manifold - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - 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) - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract Provided is a construction machine including exhaust ducts and favorably discharging air from an engine room through an air outlet. The construction machine includes an engine room with an upper wall portion and a cooling fan, the upper wall portion formed with first and second exhaust ducts. The first exhaust duct includes an upstream portion extending in a first horizontal direction and a downstream portion extending upward from a terminal end of the upstream portion to a first air outlet. The second exhaust duct includes a cross portion crossing the upstream portion in a second horizontal direction perpendicular to the first horizontal direction above the upstream portion. The cross portion allows air to flow from a second air inlet opened downward and sideward of the upstream portion to a second air outlet opposite to the second air inlet, through an upper side of the upstream portion. ## Claims ### Claim 1 A construction machine, comprising: an engine; an engine room having an external wall enclosing an internal space for housing the engine; a cooled object disposed in the internal space of the engine room; and a cooling fan that is driven to produce cooling air flow for cooling the cooled object in the internal space of the engine room, wherein: the external wall of the engine room includes an upper wall portion located on an upper side of the internal space, the upper wall portion being formed with a first exhaust duct, and a second exhaust duct for guiding air inside the internal space to an outside of the engine room; the first exhaust duct includes an upstream portion extending in a first horizontal direction and having one end which forms a first air inlet and a downstream portion extending upward from a terminal end of the upstream portion to a first air outlet opened upward in the upper wall portion, the first exhaust duct allowing air to flow from the first air inlet to the first air outlet; and the second exhaust duct includes a cross portion crossing the upstream portion of the first exhaust duct on an upper side of the upstream portion in a second horizontal direction perpendicular to the first horizontal direction, the second exhaust duct having a second air inlet opened downward at a position sideward of the upstream portion of the first exhaust duct with respect to the second horizontal direction and a second air outlet opened sideward at a position opposite to the air inlet across the cross portion in the upper wall portion, the cross portion allowing air to flow from the second air inlet to the second air outlet through an upper side of the upstream portion of the first exhaust duct. ### Claim 2 (depends on 1) The construction machine according to claim 1, wherein: the engine has an engine output shaft; the cooling fan includes a plurality of blades coupled to the engine output shaft so as to be rotated about a fan rotational axis parallel to an axis of the engine output shaft; the plurality of blades are rotated to thereby form an axial flow in a direction parallel to the axial direction of the engine output shaft and a rotational flow around the axis parallel to the axial direction of the engine output shaft; and the first horizontal direction is parallel to the axial direction of the engine output shaft. ### Claim 3 (depends on 2) The construction machine according to claim 2, wherein the second air outlet of the second exhaust duct is provided above a position where a tangential direction of the rotational flow is upward. ### Claim 4 (depends on 1) The construction machine according to claim 1, wherein the upper wall portion of the engine room includes at least one shared wall that configures both a part of a wall of the first exhaust duct and a part of a wall of the second exhaust duct. ### Claim 5 (depends on 4) The construction machine according to claim 4, wherein the at least one shared wall includes an upstream partition wall that vertically partitions the upstream portion of the first exhaust duct and the cross portion of the second exhaust duct from each other to configure both of a top wall of the upstream portion and a bottom wall of the cross portion. ### Claim 6 (depends on 4) The construction machine according to claim 4, wherein the at least one shared wall includes a downstream partition wall that partitions the downstream portion of the first exhaust duct and the cross portion of the second exhaust duct from each other in the first horizontal direction to configure both a side wall of the downstream portion and a side wall of the cross portion. ### Claim 7 (depends on 1) The construction machine according to claim 1, wherein: the upper wall portion includes a pair of opposition side walls opposed to each other in the second horizontal direction across the upstream portion of the first exhaust duct therebetween and an external side wall located on an outer side of one side wall of the opposition side walls, the one side wall being closer to the second air inlet; and the opposition side wall closer to the second air inlet and the external side wall constitute an inlet-side portion which is a part of the second exhaust duct and located under an upstream end portion of the cross portion of the second exhaust duct. ### Claim 8 (depends on 1) The construction machine according to claim 1, wherein the cross portion of the second exhaust duct has a shape having a size in the first horizontal direction, the size increasing as the cross portion extends from the second air inlet toward the second air outlet.