# US 11,299,110 B2 · Acoustic insulation structure for power train > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,299,110 B2 - Document ID: US11299110B2 - Status: Granted - Kind: B2 - Application number: 16/253,625 - Filed: 2019-01-22 - Published: 2019-09-12 - Granted: 2022-04-12 - Earliest claimed: 2019-01-22 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Yoshiya Yamashita; Masaya Tagawa - Web page: https://patentgrep.com/patent/US11299110B2 ## CPC - B60R 13/07: Water drainage or guide means not integral with roof structure (B60R13/06, {B60J10/25} take precedence; {integral with roof structure B62D25/07; drainage openings having movable or removable closures B62D25/24}) - B60R 13/0838: {for engine compartments} - F01P 11/12: Filtering, cooling, or silencing cooling-air - F02B 77/13: Acoustic insulation - F01P 11/10: Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - 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 acoustic insulation structure for a power train according to the present disclosure is provided with a cover member that covers at least an internal combustion engine of the power train including the internal combustion engine, and that includes a pool portion in which water that has entered into the inside of the cover member pools; and a water-absorption member arranged at the inside of the cover member. The cover member includes a moisture outlet that releases, into the atmospheric air, moisture present inside the cover member. The water-absorption member extends to the moisture outlet from the pool portion. ## Claims ### Claim 1 Acoustic insulation structure for a power train, comprising: a cover member that covers at least an internal combustion engine of the power train including the internal combustion engine, and that includes a pool portion in which water that has entered into an inside of the cover member pools; and a water-absorption member arranged at the inside of the cover member, wherein the cover member includes a moisture outlet that releases, into an atmospheric air, moisture present inside the cover member, and wherein the water-absorption member extends to the moisture outlet from the pool portion. ### Claim 2 (depends on 1) The acoustic insulation structure for a power train according to claim 1, wherein the moisture outlet is arranged at a location opposed to a high-temperature portion of the internal combustion engine or a vehicle on which the power train is mounted. ### Claim 3 (depends on 2) The acoustic insulation structure for a power train according to claim 2, wherein the high-temperature portion is an exhaust system part of the internal combustion engine. ### Claim 4 (depends on 2) The acoustic insulation structure for a power train according to claim 2, wherein the high-temperature portion is a radiator through which coolant that cools the internal combustion engine flows. ### Claim 5 (depends on 1) The acoustic insulation structure for a power train according to claim 1, wherein the cover member covers a lower portion of the internal combustion engine including a bottom portion of the internal combustion engine, and wherein the pool portion is arranged at a location opposed to the bottom portion. ### Claim 6 (depends on 1) The acoustic insulation structure for a power train according to claim 1, further comprising an oil detection sheet that is attached to the water-absorption member at a location at which oil drops from the internal combustion engine, and that does not change color even if the oil detection sheet comes contact with moisture and changes color in response to attachment of the oil. ### Claim 7 (depends on 1) The acoustic insulation structure for a power train according to claim 1, wherein the power train includes a transmission combined with the internal combustion engine, wherein the cover member covers the transmission in addition to the internal combustion engine, and wherein the acoustic insulation structure further comprises an oil detection sheet that is attached to the water-absorption member at a location at which oil drops from the transmission, and that does not change color even if the oil detection sheet comes contact with moisture and changes color in response to attachment of the oil. ### Claim 8 (depends on 1) The acoustic insulation structure for a power train according to claim 1, further comprising a fuel detection sheet that is attached to the water-absorption member at a location at which fuel drops from the internal combustion engine, and that does not change color even if the oil detection sheet comes contact with moisture and changes color in response to attachment of the fuel. ### Claim 9 (depends on 1) The acoustic insulation structure for a power train according to claim 1, further comprising a coolant detection sheet that is attached to the water-absorption member at a location at which coolant that cools the internal combustion engine drops from the internal combustion engine, and that does not change color even if the oil detection sheet comes contact with moisture and changes color in response to attachment of the coolant.