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公开(公告)号：US20180238224A1
公开(公告)日：2018-08-23
申请号：US15435963
申请日：2017-02-17
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael P. Kaczmar , Alan E. Bowler
Abstract: A heat exchanger includes a heat exchanger body arranged along an axis and having an external surface in contact with a surrounding first fluid. The body defines a first fluid passage centered on and extending along the axis. The body also defines a second fluid passage extending parallel with respect to the axis and spaced away from the axis by a second passage distance, and a third fluid passage extending parallel with respect to the axis and spaced away from the axis by a third passage distance. The first, second, and third passages are parallel to one another, while the third passage distance is greater than the second passage distance. Each of the first and third passages is configured to accept a flow of a second fluid and the second fluid passage is configured to hold a volume of air to thermally insulate the first passage from the third passage.
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公开(公告)号：US10914273B2
公开(公告)日：2021-02-09
申请号：US16354690
申请日：2019-03-15
Applicant: GM Global Technology Operations LLC
Inventor： Michael A. Smith , Robert J. Gallon , Michael P. Kaczmar , Martino A. Casetti , Eric M. Hall
Abstract: An engine includes an air intake system, an exhaust system, a single-cylinder-sourced EGR system, an exhaust sensor that is disposed to monitor exhaust gas from the single one of the cylinders, and a diverter valve. A controller includes an instruction set that executable to determine operation of the engine in a fuel cut-off mode, discontinue fuel flow to the single one of the cylinders, divert exhaust gas from the single one of the cylinders to the air intake system, determine an airflow, temperature, and an equivalence ratio of the diverted exhaust gas from the single one of the cylinders, determine a mass flowrate of oxygen in the diverted exhaust gas, integrate the mass flowrate of oxygen in the diverted exhaust gas, and discontinue the diverting of the exhaust gas from the single one of the cylinders when the integrated mass flowrate of oxygen is greater than a threshold value.
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公开(公告)号：US20200291906A1
公开(公告)日：2020-09-17
申请号：US16354690
申请日：2019-03-15
Applicant: GM Global Technology Operations LLC
Inventor： Michael A. Smith , Robert J. Gallon , Michael P. Kaczmar , Martino A. Casetti , Eric M. Hall
Abstract: An engine includes an air intake system, an exhaust system, a single-cylinder-sourced EGR system, an exhaust sensor that is disposed to monitor exhaust gas from the single one of the cylinders, and a diverter valve. A controller includes an instruction set that executable to determine operation of the engine in a fuel cut-off mode, discontinue fuel flow to the single one of the cylinders, divert exhaust gas from the single one of the cylinders to the air intake system, determine an airflow, temperature, and an equivalence ratio of the diverted exhaust gas from the single one of the cylinders, determine a mass flowrate of oxygen in the diverted exhaust gas, integrate the mass flowrate of oxygen in the diverted exhaust gas, and discontinue the diverting of the exhaust gas from the single one of the cylinders when the integrated mass flowrate of oxygen is greater than a threshold value.
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公开(公告)号：US10677142B2
公开(公告)日：2020-06-09
申请号：US15435963
申请日：2017-02-17
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael P. Kaczmar , Alan E. Bowler
IPC: F01P11/08 , F01P3/02 , F01M5/00 , F28D7/10 , F02F7/00 , F01M1/02 , F28F21/08 , F28F21/06 , F28F27/02 , F01M11/00
Abstract: A heat exchanger includes a heat exchanger body arranged along an axis and having an external surface in contact with a surrounding first fluid. The body defines a first fluid passage centered on and extending along the axis. The body also defines a second fluid passage extending parallel with respect to the axis and spaced away from the axis by a second passage distance, and a third fluid passage extending parallel with respect to the axis and spaced away from the axis by a third passage distance. The first, second, and third passages are parallel to one another, while the third passage distance is greater than the second passage distance. Each of the first and third passages is configured to accept a flow of a second fluid and the second fluid passage is configured to hold a volume of air to thermally insulate the first passage from the third passage.
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