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公开(公告)号：US11788460B2
公开(公告)日：2023-10-17
申请号：US17460088
申请日：2021-08-27
发明人： Jens Keuler , Matthieu Gancedo , Quentin Roberts
CPC分类号： F02B37/12 , F02B37/04 , F02B39/10 , F02B2037/122 , F02B2037/125
摘要： Methods and systems for controlling a turbocharger associated with an engine. The turbocharger is operated in a region of operation creating potential surge conditions, but surge is avoided by varying the speed of the turbocharger in accordance with speed parameters determined by observing a resonant frequency of surge in the system.
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公开(公告)号：US20230064305A1
公开(公告)日：2023-03-02
申请号：US17460088
申请日：2021-08-27
发明人： Jens Keuler , Matthieu Gancedo , Quentin Roberts
摘要： Methods and systems for controlling a turbocharger associated with an engine. The turbocharger is operated in a region of operation creating potential surge conditions, but surge is avoided by varying the speed of the turbocharger in accordance with speed parameters determined by observing a resonant frequency of surge in the system.
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公开(公告)号：US20240209868A1
公开(公告)日：2024-06-27
申请号：US18145062
申请日：2022-12-22
发明人： Jens Keuler , Daniel Terber , Joachim Ziegler
CPC分类号： F04D27/004 , F02B37/04 , F02B37/14 , F02B39/10 , F04D13/06 , F04D27/001 , F04D29/4206 , F04D29/668 , F02B2037/122
摘要： A turbocharger control system including a turbocharger having an exhaust turbine and a centrifugal compressor mechanically coupled by a shaft, a pressure sensor for detecting a boost pressure, an electric motor configured to apply a rotational pressure to the shaft in response to a current, and a processor determining an expected rotational speed in response to the boost pressure, determining a current value in response to a difference between the expected rotational speed and a desired rotational speed, and generating a control signal indicative of the current value to control the current applied to the electric motor.
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公开(公告)号：US11692471B1
公开(公告)日：2023-07-04
申请号：US17661865
申请日：2022-05-03
发明人： Malay Maniar , Jens Keuler , Surya Yadla
CPC分类号： F01N3/2013 , F01N3/323 , F01N9/00 , F01N3/225 , F01N2610/085 , F01N2900/10 , F01N2900/1602
摘要： In an internal combustion engine system having an emissions control system including an electrically heated catalyst (E-cat) and an E-compressor (either standalone or part of an E-turbocharger), a method for operating the emissions control system includes predicting that a cold start of the engine is imminent, activating the E-cat and the E-compressor in response to the prediction, and monitoring a characteristic parameter Pe of the E-cat as it changes. The E-compressor speed Nc is regulated to change in proportion to the changing Pe while the E-cat is activated. If no engine start occurs, the E-cat is deactivated, and speed Nc is regulated to track the changing Pe.
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公开(公告)号：US11639703B1
公开(公告)日：2023-05-02
申请号：US17807923
申请日：2022-06-21
发明人： Jens Keuler , Daniel Terber , Joachim Ziegler
摘要： In a turbocharged internal combustion engine system including an eCompressor as a secondary air pump (SAP) for injecting air into an exhaust system of the ICE, controllable valves enable the turbocharger compressor and the SAP to provide two-stage compressed air to the intake of the ICE in certain operating conditions, or to feed the air via a secondary air injection line (SAI line) into the exhaust system in other conditions. A conduit is tapped off the discharge of the SAP and connects with discharge ducting from the turbocharger compressor, and an on/off valve configured for defined leakage in the “off” position controls flow through the conduit. When the air from the SAP is needed only for injection air, the leakage through the leaky valve into the intake system suppresses surge of the SAP.
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