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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
Applicant: Garrett Transportation I Inc.
Inventor： Jens Keuler , Daniel Terber , Joachim Ziegler
Abstract: 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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公开(公告)号：US20240209868A1
公开(公告)日：2024-06-27
申请号：US18145062
申请日：2022-12-22
Applicant: Garrett Transportation I Inc
Inventor： Jens Keuler , Daniel Terber , Joachim Ziegler
CPC classification number: F04D27/004 , F02B37/04 , F02B37/14 , F02B39/10 , F04D13/06 , F04D27/001 , F04D29/4206 , F04D29/668 , F02B2037/122
Abstract: 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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