# US 2014/0190164 A1 · High pressure turbine inlet duct and engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190164 A1 - Document ID: US20140190164A1 - Status: Published application - Kind: A1 - Application number: 13/925,091 - Filed: 2013-06-24 - Published: 2014-07-10 - Earliest claimed: 2013-01-07 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: CHARLES B. ATZ; JOHN DOWELL; VIJAYASELVAN JAYAKAR; PRATAP SUBHASH SHITOLE; CAIN PIOTROWSKI; TRENT A. LARSON; EDWARD PHANEUF; ABHIJEET WARALE; SHIRISH BHIDE - Web page: https://patentgrep.com/patent/US20140190164A1 ## CPC - F02B 37/004: {with exhaust drives arranged in series} - F02B 37/02: Gas passages between engine outlet and pump drive, e.g. reservoirs - Y02T 10/12: Improving ICE efficiencies - 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 duct for connection between an exhaust manifold and a high-pressure turbine inlet include a cylindrical duct body defining a longitudinal axis. A frustoconical outlet nozzle connected at one end of the duct body and extending at about eighty-five degrees from the longitudinal axis. The duct further includes an inlet bell connected at the other end of the duct body and extending at about fifty degrees from the longitudinal axis. ## Claims ### Claim 1 A duct, comprising: a cylindrical duct body defining a longitudinal axis; a frustoconical outlet nozzle connected at one end of the duct body and extending at from eighty to ninety degrees from the longitudinal axis; and an inlet bell connected at the other end of the duct body and extending at from forty-five to fifty-five degrees from the longitudinal axis. ### Claim 2 (depends on 1) The duct of claim 1, wherein the outlet nozzle extends from the longitudinal axis in a first plane, and the inlet bell extends from the longitudinal axis in a second plane that is rotated around the longitudinal axis at about five degrees from the first plane. ### Claim 3 (depends on 2) The duct of claim 2, further comprising legs formed on the duct body and defining holes with axes extending orthogonal to a third plane that is rotated around the longitudinal axis at about twenty degrees from the second plane. ### Claim 4 (depends on 3) The duct of claim 3, further comprising first and second pegs protruding from a lower surface of the duct body orthogonal to the third plane, for engaging the duct body with an engine to which the duct is to be mounted. ### Claim 5 (depends on 4) The duct of claim 4, wherein the first peg is generally square in shape. ### Claim 6 (depends on 4) The duct of claim 4, wherein the second peg has an elongated cross-section. ### Claim 7 (depends on 1) The duct of claim 1, wherein the frustoconical outlet nozzle includes a first portion with its outer surface tapered inward at about eight and one half degrees, and includes a second portion with its outer surface tapered inward at about four degrees, the second portion disposed tipward from the first portion. ### Claim 8 (depends on 7) The duct of claim 7, wherein the second portion extends from the first portion to the tip of the frustoconical outlet nozzle, and the second portion extends about one quarter the width of the first portion. ### Claim 9 (depends on 1) The duct of claim 1, wherein the inlet bell extends from the longitudinal axis for a lesser distance than does the outlet nozzle. ### Claim 10 (depends on 1) The duct of claim 1, wherein the inlet bell is configured for attachment to an exhaust manifold duct, and the frustoconical outlet nozzle is configured for attachment to an inlet of a high pressure turbine. ### Claim 11 (depends on 1) A system comprising: an engine having an exhaust manifold; a high pressure turbocharger operably coupled to the engine and comprising a high pressure turbine and a high pressure compressor; at least one low pressure turbocharger operably coupled to the high pressure turbocharger; and a duct as claimed in claim 1, wherein the inlet bell is attached to a duct of the exhaust manifold, and wherein the frustoconical outlet nozzle is attached to an inlet of the high pressure turbine. ### Claim 12 A diesel engine comprising: an exhaust manifold; an intake manifold; one or more cylinders arranged to receive intake air from the intake manifold and to discharge exhaust gas to the exhaust manifold; a turbocharger including a turbine coupled to receive exhaust gas from the exhaust manifold and including a compressor coupled to supply intake air to the intake manifold; and a turbine inlet duct coupled to conduct exhaust gas from the exhaust manifold to the turbine of the turbocharger, said turbine inlet duct including: a cylindrical duct body defining a longitudinal axis; a frustoconical outlet nozzle connected at one end of the duct body and extending at from eighty to ninety degrees from the longitudinal axis, wherein the frustoconical outlet nozzle is connected to the turbine; and an inlet bell connected at the other end of the duct body and extending at from forty-five to fifty-five degrees from the longitudinal axis, wherein the inlet bell is connected to the exhaust manifold. ### Claim 13 (depends on 12) The engine of claim 12, wherein the outlet nozzle extends from the longitudinal axis in a first plane, and the inlet bell extends from the longitudinal axis in a second plane that is rotated around the longitudinal axis at about five degrees from the first plane. ### Claim 14 (depends on 13) The engine of claim 13, wherein the turbine inlet duct further includes legs formed on the duct body for mounting the duct body to a support of the engine. ### Claim 15 (depends on 14) The engine of claim 14, wherein the turbine inlet duct further includes first and second pegs protruding from a lower surface of the duct body for engaging into holes formed on a cover of the engine. ### Claim 16 (depends on 15) The engine of claim 15, wherein the first peg is generally square in shape. ### Claim 17 (depends on 15) The engine of claim 15, wherein the second peg has an elongated cross-section. ### Claim 18 (depends on 12) The engine of claim 12, wherein the frustoconical outlet nozzle includes a first portion with its outer surface tapered inward at about eight and one half degrees, and includes a second portion with its outer surface tapered inward at about four degrees, the second portion disposed tipward from the first portion. ### Claim 19 (depends on 18) The engine of claim 18, wherein the second portion extends from the first portion to the tip of the frustoconical outlet nozzle, and the second portion extends about one quarter the width of the first portion. ### Claim 20 (depends on 12) The engine of claim 12, wherein the inlet bell extends from the longitudinal axis for a lesser distance than does the outlet nozzle.