# US 12,000,362 B2 · Engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,000,362 B2 - Document ID: US12000362B2 - Status: Granted - Kind: B2 - Application number: 18/048,290 - Filed: 2022-10-20 - Published: 2023-05-11 - Granted: 2024-06-04 - Earliest claimed: 2021-11-05 - Assignees: Yanmar Holdings Co., Ltd. - Applicants: Yanmar Holdings Co., Ltd. - Inventors: Shinsuke Kasazaki - Web page: https://patentgrep.com/patent/US12000362B2 ## CPC - F01N 13/00: Exhaust or silencing apparatus characterised by constructional features - F02M 26/04: with a single turbocharger - F01N 3/00: Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust (electric control F01N9/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N11/00) - F01N 13/1805: {Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body (pipe joints in general F16L; fixing auxiliaries in motor vehicles in general B60K)} - F01N 13/1816: {the pipe sections being joined together by flexible tubular elements only, e.g. using bellows or strip-wound pipes} - F02B 37/183: {Arrangements of bypass valves or actuators therefor} - F02M 26/10: having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system - F01N 2340/06: Arrangement of the exhaust apparatus relative to the turbine of a turbocharger - F01N 2470/10: Tubes having non-circular cross section - F02M 26/15: in relation to engine exhaust purifying apparatus - Y02T 10/12: Improving ICE efficiencies - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An engine is equipped with an engine body, a turbocharger, an exhaust gas purifier, an exhaust communication pipe. The turbocharger is connected to the engine body. The exhaust gas purifier purifies exhaust gas discharged from the turbocharger. The exhaust communication pipe connects the turbocharger with the exhaust gas purifier. The exhaust communication pipe includes: a first connection member that is connected to the turbocharger, and a second connection member that connects the first connection member with the exhaust gas purifier. A downstream end portion of the first connection member has an inner peripheral face having a cross-section of a circular shape. An upstream end portion of the first connection member has an inner peripheral face having a cross-section of an abnormal-shape that is different from the inner peripheral face of the downstream end portion. ## Claims ### Claim 1 An engine comprising: an engine body; a turbocharger connected to the engine body; an after-treatment unit that purifies exhaust gas discharged from the turbocharger; and an exhaust communication pipe that connects the turbocharger with the after-treatment unit, wherein the exhaust communication pipe includes: a first connection member that is connected to the turbocharger, and a second connection member that connects the first connection member with the after-treatment unit, a downstream end portion of the first connection member has an inner peripheral face having a cross-section of a circular shape, and an upstream end portion of the first connection member has an inner peripheral face having a cross-section of a shape that is different from the inner peripheral face of the downstream end portion, and the downstream end portion is connected to the second connection member, and the upstream end portion is connected to the turbo charger. ### Claim 2 (depends on 1) The engine as claimed in claim 1, wherein, the engine body has a first side portion on which the turbocharger is placed, the first connection member has a second side portion opposing the first side portion, and an outer face of the second side portion has a flat portion along the first side portion. ### Claim 3 (depends on 1) The engine as claimed in claim 1, wherein the first connection member has a curved portion placed between the upstream end portion and the downstream end portion, the curved portion has an inner portion positioned inside a bend, and an inner face of the inner portion has a cross-section with a linear portion. ### Claim 4 (depends on 1) The engine as claimed in claim 1, wherein the first connection member has a curved portion that is placed between the upstream end portion and the downstream end portion, the upstream end portion opens in one direction, the downstream end portion opens in the one direction, and the second connection member is placed above or below the turbocharger. ### Claim 5 (depends on 4) The engine as claimed in claim 4, wherein an end face of the upstream end portion and an end face of the downstream end portion are placed on a substantially same plane. ### Claim 6 (depends on 4) The engine as claimed in claim 4, wherein the second connection member has a bellows portion in a shape of a bellows connected to the downstream end portion of the first connection member, and the bellows portion is placed above or below the turbocharger. ### Claim 7 (depends on 1) The engine as claimed in claim 1, wherein the after-treatment unit is fixed to the engine body. ### Claim 8 (depends on 1) The engine according to claim 1, wherein the turbocharger has: a communication pipe connection portion connected to the exhaust communication pipe, an opening portion which is placed inside the communication pipe connection portion, and through which the exhaust gas passes, and a waste gate port which is adjacent to the opening portion and which is opened and closed by a waste gate valve, and the communication pipe connection portion has an inner peripheral face having a cross-section of a shape that is different from a circular shape. ### Claim 9 An engine comprising: an engine body; a turbocharger connected to the engine body; an after-treatment unit that purifies exhaust gas discharged from the turbocharger; and an exhaust communication pipe that connects the turbocharger with the after-treatment unit, wherein the turbocharger has a communication pipe connection portion, the exhaust communication pipe includes: a first connection member that is connected to the turbocharger, and a second connection member that connects the first connection member with the after-treatment unit, a downstream end portion of the first connection member has an inner peripheral face having a cross-section of a circular shape, and an upstream end portion of the first connection member and the communication pipe connection portion have an inner peripheral face respectively, each inner peripheral face having a cross-section of a shape that is different from the inner peripheral face of the downstream end portion.