# US 10,480,378 B2 · Engine exhaust structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,480,378 B2 - Document ID: US10480378B2 - Status: Granted - Kind: B2 - Application number: 15/652,334 - Filed: 2017-07-18 - Published: 2018-02-01 - Granted: 2019-11-19 - Earliest claimed: 2016-07-26 - Assignees: Mazda Motor Corporation - Applicants: Mazda Motor Corporation - Inventors: Toshiaki Kamo; Hirokazu Hasegawa; Haruna Yanagida; Miki Noguchi - Web page: https://patentgrep.com/patent/US10480378B2 ## CPC - F01N 3/2892: {Exhaust flow directors or the like, e.g. upstream of catalytic device} - F01N 5/04: the devices using kinetic energy - F01N 13/1872: {the assembly using stamp-formed parts or otherwise deformed sheet-metal} - F02B 37/00: Engines characterised by provision of pumps driven at least for part of the time by exhaust - F02B 67/10: of charging or scavenging apparatus - F01N 2240/20: a flow director or deflector - F01N 2470/18: the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus - F01N 2490/00: Structure, disposition or shape of gas-chambers - 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) - 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 A exhaust gas purifier includes a case having a flat transverse section including a pair of facing short sides and a pair of facing long sides, and configured to house a catalytic converter, and an inlet cone including a conical portion, and configured to connect an outlet of the turbine to an inlet of the case. The conical portion includes an inclined wall inclined from a mainstream of the exhaust gas to increase the transverse section of a path of the exhaust gas. A recess recessed inward is formed in a portion corresponding to each of the long sides of the inclined wall of the conical portion. ## Claims ### Claim 1 An engine exhaust structure comprising: a turbine of a turbocharger provided for an exhaust pipe of an engine, and rotated by energy of exhaust gas of the engine; and an exhaust gas purifier connected directly downstream of the turbine, and configured to purify the exhaust gas, wherein the exhaust gas purifier includes a case having a flat transverse section including a pair of facing short sides and a pair of facing long sides, and configured to house a catalytic converter, and an inlet cone including a conical portion, and configured to connect an outlet of the turbine to an inlet of the case, the conical portion including an inclined wall inclined from a mainstream of the exhaust gas to increase a transverse section of a path of the exhaust gas, and wherein a recess recessed inward is formed in a portion corresponding to each of the facing long sides of the inclined wall of the conical portion. ### Claim 2 (depends on 1) The engine exhaust structure of claim 1, wherein the recess includes a first wall expanding along the mainstream of the exhaust gas and along the facing long sides, and a second wall continuous with the first wall, and expanding outward from the first wall along the facing long sides. ### Claim 3 (depends on 1) The engine exhaust structure of claim 1, wherein an expanded portion is provided between the outlet of the turbine and an inlet of the inlet cone, and a transverse section of a path of the exhaust gas gradually increases in the expanded portion. ### Claim 4 (depends on 1) The engine exhaust structure of claim 1, wherein a position of the outlet of the turbine connected to the conical portion is shifted toward one of the facing short sides in a direction in which the facing short sides face each other, an inlet of the conical portion is interposed between the facing long sides, a first recess is formed in a portion of one of the facing long sides, through which the exhaust gas from the inlet of the conical portion passes in a direction, in which the exhaust gas swirls, to reach the one of the facing short sides, and a second recess is formed in a portion of the other one of the facing long sides, through which the exhaust gas from the inlet of the conical portion passes in the direction, in which the exhaust gas swirls, to reach the other one of the facing short sides, wherein the second recess is larger than the first recess. ### Claim 5 (depends on 1) The engine exhaust structure of claim 1, wherein the recess includes an upstream recess located upstream in a direction in which the exhaust gas swirls along the facing long sides, and a downstream recess located downstream in the direction in which the exhaust gas swirls along the facing long sides, wherein the downstream recess is recessed more deeply than the upstream recess. ### Claim 6 (depends on 1) The engine exhaust structure of claim 1, wherein an engine compartment including the engine includes the exhaust gas purifier and a second exhaust gas purifier connected downstream of the exhaust gas purifier. ### Claim 7 (depends on 1) The engine exhaust structure of claim 1, wherein the engine is mounted longitudinally, the case of the exhaust gas purifier has a vertically long flat transverse section, the exhaust gas purifier is placed on a side of the engine, and the engine and the exhaust gas purifier are surrounded and encapsulated by a partition. ### Claim 8 (depends on 7) The engine exhaust structure of claim 7, wherein the turbine is placed above an exhaust manifold of the engine, the exhaust gas purifier is placed near a top of the engine, and a heat shielding wall covering the engine and the exhaust gas purifier is placed above the exhaust gas purifier.