Patents by Inventor Gernot Hertweck
Gernot Hertweck has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9091276Abstract: In a sleeve element for the axially fixing at least one bearing of a rotatable shaft, in particular a shaft of an exhaust gas turbocharger, which sleeve element has at least one through-opening in its circumferential surface, the at least one through-opening has a substantially conical shape in the radial direction of the sleeve element at least in a section thereof, and also in a turbocharger for an internal combustion engine, which comprises a speed detection device and a sleeve element for axially fixing at least one bearing of a shaft of the turbocharger, wherein the sleeve element has at least one opening through which the speed detection device extends and which has a substantially conical shape in the radial direction of the sleeve element at least in a section thereof.Type: GrantFiled: September 23, 2011Date of Patent: July 28, 2015Assignee: DAIMLER AGInventors: Gernot Hertweck, Johannes Seuffert
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Patent number: 8307648Abstract: In a compressor of a turbocharger of an internal combustion engine comprising a housing with an inflow channel; a compressor impeller arranged in the inflow channel; and a bypass channel which has a first flow opening upstream of the compressor impeller inlet, a second flow opening downstream of the compressor impeller inlet and an axial annular chamber which connects the first and the second flow openings. An axial vane structure is provided in the axial annular chamber of the bypass channel, which imparts a swirl direction corresponding to that of the air mass flow in the inflow channel to the air mass flowing through the bypass channel from the second to the first flow opening.Type: GrantFiled: August 15, 2008Date of Patent: November 13, 2012Assignee: Daimler AGInventors: Siegfried Sumser, Gernot Hertweck, Paul Löffler, Lionel Le Clech
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Publication number: 20120060496Abstract: In a sleeve element for the axially fixing at least one bearing of a rotatable shaft, in particular a shaft of an exhaust gas turbocharger, which sleeve element has at least one through-opening in its circumferential surface, the at least one through-opening has a substantially conical shape in the radial direction of the sleeve element at least in a section thereof, and also in a turbocharger for an internal combustion engine, which comprises a speed detection device and a sleeve element for axially fixing at least one bearing of a shaft of the turbocharger, wherein the sleeve element has at least one opening through which the speed detection device extends and which has a substantially conical shape in the radial direction of the sleeve element at least in a section thereof.Type: ApplicationFiled: September 23, 2011Publication date: March 15, 2012Inventors: Gernot Hertweck, Johannes Seuffert
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Publication number: 20100310364Abstract: In a turbine housing, for an exhaust gas turbocharger of an internal combustion engine with an exhaust gas guide section which has at least one spiral channel that can be coupled to an exhaust path of an exhaust tract and a reception chamber for accommodating a turbine wheel arranged downstream of the at least one spiral channel, at least one first and one second partial housing are provided, which include complementary wall regions of the at least one spiral channel and which are joined so as to form the at least one spiral channel. Also, an exhaust gas turbocharger with such a turbine housing is provided and a method for producing such a turbine housing.Type: ApplicationFiled: August 12, 2010Publication date: December 9, 2010Inventors: Siegfried Botsch, Christian Elsner, Gernot Hertweck, Markus Müller, Simon Raithel, Martin Schlegl, Johannes Seuffert
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Patent number: 7752844Abstract: In an engine braking method and an internal combustion engine including an engine braking arrangement, wherein the engine has high pressure and low pressure exhaust gas turbochargers connected in series, with a bypass (12) around the high-pressure compressor allowing the air mass flow selectively to bypass the high pressure compressor which is arranged near the engine, and bypasses around both turbines permitting the exhaust gas mass flow selectively to bypass the high-pressure exhaust gas turbine which is near the engine and also the low pressure turbine the intake air and the exhaust gas flow are controlled so as to accurately provide for a desired engine braking power for example for maintaining a desired vehicle speed.Type: GrantFiled: August 21, 2007Date of Patent: July 13, 2010Assignee: Daimler AGInventors: Martin Dietz, Peter Fledersbacher, Gernot Hertweck, Siegfried Sumser
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Patent number: 7637106Abstract: In an exhaust gas turbocharger for an internal combustion engine having air intake ducts and exhaust gas discharge ducts including a compressor and a turbine with at least two inlet flow passages, a flow adjusting device (15) arranged in the exhaust gas discharge ducts upstream of the turbine and including a rotary slide valve for controlling the exhaust gas flow first and second flow channels extending through the rotary slide, a third flow channel extends axially partially through the rotary slide valve via inlet openings at the circumference of the rotary slide which can be brought into overlapping relationship with rotary slide housing openings for controlling the exhaust gas flow from the engine to the turbine.Type: GrantFiled: May 17, 2007Date of Patent: December 29, 2009Assignee: Daimler AGInventors: Gernot Hertweck, Torsten Hirth, Stephan Krätschmer, Paul Löffler, Siegfried Sumser
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Publication number: 20090013689Abstract: In a compressor of a turbocharger of an internal combustion engine comprising a housing with an inflow channel; a compressor impeller arranged in the inflow channel; and a bypass channel which has a first flow opening upstream of the compressor impeller inlet, a second flow opening downstream of the compressor impeller inlet and an axial annular chamber which connects the first and the second flow openings. An axial vane structure is provided in the axial annular chamber of the bypass channel, which imparts a swirl direction corresponding to that of the air mass flow in the inflow channel to the air mass flowing through the bypass channel from the second to the first flow opening.Type: ApplicationFiled: August 15, 2008Publication date: January 15, 2009Inventors: Siegfried Sumser, Gernot Hertweck, Paul Loffler, Lionel Le Clech
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Patent number: 7428815Abstract: In a method of operating a compressor near the compressor pumping limit wherein the compressor includes a control arrangement for adjusting the momentary operating state of the compressor, the flow velocity of a mass flow through the compressor in the boundary layer along the wall of the flow passage is determined for detecting operation of the compressor close to the pumping limit from a reversal of the direction of the mass flow vector in the boundary layer and the control arrangement is actuated so as to prevent the compressor from transgressing the pumping limit.Type: GrantFiled: April 20, 2005Date of Patent: September 30, 2008Assignee: Daimler AGInventors: Peter Fledersbacher, Gernot Hertweck, Steffen Schiedt, Guido Vent, Jürgen Willand
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Publication number: 20080216795Abstract: In an engine braking method and an internal combustion engine including an engine braking arrangement, wherein the engine has high pressure and low pressure exhaust gas turbochargers connected in series, with a bypass (12) around the high-pressure compressor allowing the air mass flow selectively to bypass the high pressure compressor which is arranged near the engine, and bypasses around both turbines permitting the exhaust gas mass flow selectively to bypass the high-pressure exhaust gas turbine which is near the engine and also the low pressure turbine the intake air and the exhaust gas flow are controlled so as to accurately provide for a desired engine braking power for example for maintaining a desired vehicle speed.Type: ApplicationFiled: August 21, 2007Publication date: September 11, 2008Inventors: Martin Dietz, Peter Fledersbacher, Gernot Hertweck, Siegfried Sumser
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Publication number: 20080000460Abstract: In an exhaust gas turbocharger for an internal combustion engine having air intake ducts and exhaust gas discharge ducts including a compressor and a turbine with at least two inlet flow passages, a flow adjusting device (15) arranged in the exhaust gas discharge ducts upstream of the turbine and forming a flow adjusting device having a rotary slide disposed in a rotary slide housing whereby a flow connection can be established or blocked between the flow adjusting device and a turbine inlet flow passage by means of the rotary slide (19), the rotary slide valve has first and second flow channels transversely extending through the rotary slide, a third flow channel which extends axially partially through the rotary slide and having at least two inlet openings at the circumference of the rotary slide which can be brought into overlapping relationship with rotary slide housing openings of an axial end of the rotary slide for controlling the exhaust gas flow from the engine to the turbine or, via a by-pass duct,Type: ApplicationFiled: May 17, 2007Publication date: January 3, 2008Inventors: Gernot Hertweck, Torsten Hirth, Stephan Kratschmer, Paul Loffler, Siegfried Sumser
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Patent number: 7152573Abstract: In a method for operating an internal combustion engine with exhaust gas purification system, a rich-burn mode of the internal combustion engine with a rich exhaust gas composition or a lean-burn mode of the internal combustion engine with a lean exhaust gas composition is set alternately, and the quantity of fuel which is introduced during a combustion cycle of the internal combustion engine is introduced by at least one preinjection, at least one main injection and at least one afterinjection.Type: GrantFiled: February 7, 2004Date of Patent: December 26, 2006Assignee: DaimlerChrysler AGInventors: Oliver Abet, Gernot Hertweck, Thomas Muehleisen, Marco Stotz
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Publication number: 20060207253Abstract: In a method for operating a supercharged internal combustion engine, the exhaust gas turbine of which is equipped with a variable turbine geometry, if the pressure upstream of the compressor is higher than the pressure downstream of the compressor in the lower load/speed of the internal combustion engine, the variable turbine geometry is adjusted in the direction of its back-up position until the turbine efficiency is at least approximately in the region of the optimum efficiency.Type: ApplicationFiled: October 26, 2005Publication date: September 21, 2006Inventors: Siegfried Sumser, Helmut Finger, Peter Fledersbacher, Thomas Kuhn, Gernot Hertweck
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Publication number: 20060207549Abstract: In a method for operating an internal combustion engine with exhaust gas purification system, a rich-burn mode of the internal combustion engine with a rich exhaust gas composition or a lean-burn mode of the internal combustion engine with a lean exhaust gas composition is set alternately, and the quantity of fuel which is introduced during a combustion cycle of the internal combustion engine is introduced by means of at least one preinjection, at least one main injection and at least one afterinjection.Type: ApplicationFiled: February 7, 2004Publication date: September 21, 2006Inventors: Oliver Abet, Gernot Hertweck, Thomas Muehleisen, Marco Stotz
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Publication number: 20060124763Abstract: The invention is based on a sliding valve (10) having a sliding sleeve (12) which is axially displaceable in a control cylinder (13) and which controls, with at least one control face (23) on its outer periphery, at least one control opening (17, 18) in the control cylinder (13) out. It is proposed that the control face (23) is radially elastically flexible in the direction of the control cylinder (13).Type: ApplicationFiled: November 19, 2003Publication date: June 15, 2006Inventors: Gernot Hertweck, Katsuyoshi Koyanagi, Holger Kogl, Heinrich Muller, Heinz Oing, Gregor Renner, Marco Stotz, Jens-Peter Wobbe
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Publication number: 20050265822Abstract: In a method of operating a compressor near the compressor pumping limit wherein the compressor includes a control arrangement for adjusting the momentary operating state of the compressor, the flow velocity of a mass flow through the compressor in the boundary layer along the wall of the flow passage is determined for detecting operation of the compressor close to the pumping limit from a reversal of the direction of the mass flow vector in the boundary layer and the control arrangement is actuated so as to prevent the compressor from transgressing the pumping limit.Type: ApplicationFiled: April 20, 2005Publication date: December 1, 2005Inventors: Peter Fledersbacher, Gernot Hertweck, Steffen Schiedt, Guido Vent, Jurgen Willand
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Publication number: 20050207915Abstract: In a motor vehicle drive arrangement having an electric motor with a rotor for driving an oil pump and being supported in an air space of a housing by a rotor disk of the rotor of the electric motor which is permanently connected to a pump rotor of the oil pump, a freewheeling mechanism for a mechanical drive of the pump rotor of the oil pump is provided for coupling the oil pump to a vehicle travel drive train of the vehicle drive arrangement when the travel drive train rotates faster than the electric motor.Type: ApplicationFiled: April 20, 2005Publication date: September 22, 2005Inventors: Peter Fledersbacher, Gernot Hertweck, Steffen Schiedt, Guido Vent, Jurgen Willand
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Patent number: 6789511Abstract: A method for operating an internal combustion engine used as a fuel which, special fuel characteristics, during combustion by compression ignition may achieve a favorable efficiency, and may provide consumption advantages over conventional combustion methods using conventional fuels. The fuel used may be straight-run naphtha, which is also known as raw gasoline. The fuel characteristics of this fuel are less expensive than conventional fuels, since expensive further treatment of the fuel may be dispensed with during production.Type: GrantFiled: December 2, 2002Date of Patent: September 14, 2004Assignee: DaimlerChrysler AGInventors: Gernot Hertweck, Dirk Naber, Eckhard Sausen, Guido Vent
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Patent number: 6651614Abstract: In a method of operating a diesel internal combustion engine, wherein a homogeneous mixture is formed in the combustion space before a spontaneous ignition by means of fuel injected directly into separately supplied combustion air, which combustion air is admitted to the combustion space in a swirling flow about the longitudinal axis of the cylinder that can be adjusted as regards its swirl intensity by a control element. A control unit adjusts the swirl intensity in a manner coordinated with the injection parameters to provide a homogeneous mixture igniting at a predetermined point for highly effective engine operation with low emissions.Type: GrantFiled: September 28, 2001Date of Patent: November 25, 2003Assignee: Daimler Chrysler AGInventors: Tobias Fl{haeck over (a)}mig-Vetter, Ulrich Heinl, Gernot Hertweck, Katsuyoshi Koyanagi, Thomas Mühleisen, Heinz Öing, Guido Vent, Jürgen Willand
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Publication number: 20030116133Abstract: A method for operating an internal combustion engine used as a fuel which, special fuel characteristics, during combustion by compression ignition may achieve a favorable efficiency, and may provide consumption advantages over conventional combustion methods using conventional fuels. The fuel used may be straight-run naphtha, which is also known as raw gasoline. The fuel characteristics of this fuel are less expensive than conventional fuels, since expensive further treatment of the fuel may be dispensed with during production.Type: ApplicationFiled: December 2, 2002Publication date: June 26, 2003Inventors: Gernot Hertweck, Dirk Naber, Eckhard Sausen, Guido Vent
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Patent number: 6457311Abstract: An exhaust-gas turbocharger for an internal combustion engine has an exhaust-gas turbine in the exhaust tract and a compressor in the intake tract, the exhaust-gas turbine and the compressor being connected via a shaft which is supported in a casing of the exhaust-gas turbocharger via at least one bearing. In order to improve the efficiency of the turbocharger, the bearing has a non-contact design, in that, when the exhaust-gas turbocharger is in operation, the shaft is held at a distance from, and so as to be virtually free of friction with, a bearing receptacle fixed to the casing.Type: GrantFiled: March 9, 2001Date of Patent: October 1, 2002Assignee: DaimlerChrysler AGInventors: Peter Fledersbacher, Gernot Hertweck, Siegfried Sumser, Juergen Willand, Friedrich Wirbeleit