Patents by Inventor Harald Pfeffinger

Harald Pfeffinger 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).

  • Patent number: 7344312
    Abstract: Internal combustion engine with bearing shells, which are formed essentially by thermal sprayed bearing layers, wherein the thermal sprayed bearing layers are formed by at least two slide bearing materials with different hardness, which are spatially separated from each other and are provided on the outer surface of the bearing shell, as well as process for production of bearing shells for internal combustion engines including the steps: mechanical conditioning of the bearing surface coating of the bearing surface with the materials of the bearing shell by thermal spray processes finishing flattening processing of the applied layer wherein as bearing shell at least two slide bearing materials with different hardness were deposited separated spatially from each other, wherein the materials are in contact with each other via interlayers or joint layers.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: March 18, 2008
    Assignee: Daimler AG
    Inventors: Jochen Betsch, Florian Lampmann, Harald Pfeffinger, Franz Rueckert, Frank Streicher, Torsten Wittrowski
  • Patent number: 7318395
    Abstract: In an internal combustion engine having a coolant circuit which comprises a first coolant line for the cylinder block and a second coolant line for the cylinder head of the engine, with the cylinder head having at least one inlet valve and at least one outlet valve per cylinder, an additional coolant duct provided in the cylinder head in close proximity to the valves is connected to the second coolant line for directly supplying coolant to the area of the cylinder outlet valves.
    Type: Grant
    Filed: August 17, 2005
    Date of Patent: January 15, 2008
    Assignee: Daimler Chrysler AG
    Inventors: Jurgen Huter, Bernhard Jutz, Johannes Leweux, Harald Pfeffinger, Heiko Sass, Timo Schmidt, Karsten Unger
  • Patent number: 7267045
    Abstract: In an internal combustion engine for a motor vehicle, having a piston bearing surface divided into regions of different loading and having recesses for retaining lubricant arranged at distances which are shorter in regions of high loading than in regions of lower loading in a region with high loading, the distance between the recesses decreases from one recess to the next in the direction toward top dead center area with the smallest distance being at the top dead center position of the piston.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: September 11, 2007
    Assignee: DaimlerChrysler AG
    Inventors: Johannes Leweux, Wolfgang Pellkofer, Harald Pfeffinger
  • Patent number: 7237513
    Abstract: In an internal combustion engine for a motor vehicle, having a cylinder head and an engine block, each with a coolant inlet port and a coolant outlet port which is common to the cylinder head the engine block, a main coolant pump having an intake side connected to the coolant outlet port and a pressure side connected to a first control valve via which coolant reaches the inlet port of the cylinder head and the inlet port of the engine block depending on the temperature of the coolant, and to a method for operating such an internal combustion engine, wherein the main coolant pump is selectively actuated to pump the coolant through at least one of the cylinder head and the engine block or is shut down depending on the engine operating state.
    Type: Grant
    Filed: January 18, 2006
    Date of Patent: July 3, 2007
    Assignee: DaimlerChrysler AG
    Inventors: Harald Pfeffinger, Heiko Sass
  • Publication number: 20060278071
    Abstract: In an internal combustion engine for a motor vehicle, having a piston bearing surface divided into regions of different loading and having recesses for retaining lubricant arranged at distances which are shorter in regions of high loading than in regions of lower loading in a region with high loading, the distance between the recesses decreases from one recess to the next in the direction toward top dead center area with the smallest distance being at the top dead center position of the piston.
    Type: Application
    Filed: July 19, 2006
    Publication date: December 14, 2006
    Inventors: Johannes Leweux, Wolfgang Pellkofer, Harald Pfeffinger
  • Publication number: 20060157002
    Abstract: In an internal combustion engine for a motor vehicle, having a cylinder head and an engine block, each with a coolant inlet port and a coolant outlet port which is common to the cylinder head the engine block, a main coolant pump having an intake side connected to the coolant outlet port and a pressure side connected to a first control valve via which coolant reaches the inlet port of the cylinder head and the inlet port of the engine block depending on the temperature of the coolant, and to a method for operating such an internal combustion engine, wherein the main coolant pump is selectively actuated to pump the coolant through at least one of the cylinder head and the engine block or is shut down depending on the engine operating state.
    Type: Application
    Filed: January 18, 2006
    Publication date: July 20, 2006
    Inventors: Harald Pfeffinger, Heiko Sass
  • Patent number: 7013858
    Abstract: This invention relates to a method for the production of a valve seat (5) for a cylinder head of an internal combustion engine. According to said method, an additional material is melted with the cylinder head by applying energy in the site in which the valve seat (5) is to be formed. An alloy or a mixture consisting of an aluminum-iron alloy and at least another component is used as additional material.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: March 21, 2006
    Assignee: DaimlerChrysler AG
    Inventors: Juergen Claus, Reiner Heigl, Harald Pfeffinger
  • Publication number: 20060048386
    Abstract: In a process for producing a cylinder crankcase having a thermally sprayed cylinder bearing surface, a cylinder crankcase is cast, those surfaces of the subsequent cylinder barrels which are to be thermally coated are roughened, the cylinder barrels are coated by a thermal spraying process, and the cylinder barrels are remachined to their final dimensions. The cylinder crankcase is prefabricated with an oversized dimension in the region of the cylinder head sealing surface.
    Type: Application
    Filed: August 5, 2005
    Publication date: March 9, 2006
    Inventors: Jens Boehm, Dieter Brackenhammer, Stefan Diessner, Axel Heuberger, Patrick Izquierdo, Harald Pfeffinger, Dezsoe Schilling, Juergen Traber, Nazario Vocino, Walter Zwink
  • Publication number: 20060027206
    Abstract: In a process for thermal spraying of cylinder bearing surfaces of multi-line engines, a cylinder crankcase having at least two lines of cylinders is cast, those surfaces of subsequent cylinder barrels which are to be thermally coated are roughened, the cylinder barrels are coated by a thermal spraying process, and the cylinder barrels are remachined to their final dimensions. During thermal spraying, a shielding template is introduced in the region of the crankshaft space at least between a cylinder which is currently being thermally coated and an opposite cylinder of an adjacent line of cylinders.
    Type: Application
    Filed: August 3, 2005
    Publication date: February 9, 2006
    Inventors: Jens Boehm, Dieter Brackenhammer, Stefan Diessner, Axel Heuberger, Patrick Izquierdo, Harald Pfeffinger, Dezsoe Schilling, Juergen Traber, Nazario Vocino, Walter Zwink
  • Publication number: 20060026831
    Abstract: In a process for preparing a cast cylinder bore for thermal coating, a cylinder crankcase is cast, those surfaces of the subsequent cylinder barrels which are to be thermally coated are roughened, the cylinder barrels are coated by a thermal spraying process, and the cylinder barrels are remachined to their final dimensions. The surface of the cylinder bore is roughened by a jet, preferably a water jet and/or liquid jet mixed with solid particles, and material of the cylinder bore is simultaneously removed. A material thickness, which may be between 0.020-0.140 mm but preferably is between 0.004 mm-0.006 mm, is removed during the roughening operation.
    Type: Application
    Filed: August 5, 2005
    Publication date: February 9, 2006
    Inventors: Jens Boehm, Dieter Brackenhammer, Stefan Diessner, Axel Heuberger, Patrick Izquierdo, Harald Pfeffinger, Dezsoe Schilling, Juergen Traber, Nazario Vocino, Walter Zwink
  • Publication number: 20060026829
    Abstract: In a process for producing a thermally coated cylinder bearing surface having an insertion bevel, a cylinder crankcase is cast, those surfaces of the subsequent cylinder barrels which are to be thermally coated are roughened, the cylinder barrels are coated by a thermal spraying process, the cylinder bore is bevelled, and the cylinder barrels are remachined to their final dimensions. The cylinder crankcase is prefabricated with an oversized dimension in the region of the cylinder head sealing surface, and the insertion bevel for the cylinder bore is introduced into the cylinder head sealing surface which has the oversized dimension.
    Type: Application
    Filed: August 4, 2005
    Publication date: February 9, 2006
    Inventors: Jens Boehm, Dieter Brackenhammer, Stefan Diessner, Axel Heuberger, Patrick Izquierdo, Harald Pfeffinger, Dezsoe Schilling, Juergen Traber, Nazario Vocino, Walter Zwink
  • Publication number: 20060026828
    Abstract: In a process for preparing cylinder bearing surfaces which are to be thermally sprayed, in which process a cylinder crankcase is cast, those surfaces of the subsequent cylinder barrels which are to be thermally coated are roughened, the cylinder barrels are coated by a thermal spraying process, and the cylinder barrels are remachined to their final dimensions. The surface of a cylinder barrel is roughened by a jet, preferably a water jet and/or a liquid jet mixed with solid particles. Before a blasting lance is introduced into the cylinder barrel, the jet is switched on outside the barrel and is only introduced into the bore after a predeterminable stabilization time.
    Type: Application
    Filed: August 4, 2005
    Publication date: February 9, 2006
    Inventors: Jens Boehm, Dieter Brackenhammer, Stefan Diessner, Axel Heuberger, Patrick Izquierdo, Harald Pfeffinger, Dezsoe Schilling, Juergen Traber, Nazario Vocino, Walter Zwink
  • Publication number: 20060026830
    Abstract: In a process for fluid blasting cylinder bearing surfaces which are subsequently to be thermally coated, a cylinder crankcase is cast, those surfaces of the subsequent cylinder barrels which are to be thermally coated are roughened, the cylinder barrels are coated by a thermal spraying process, and the cylinder barrels are remachined to their final dimensions. The surfaces of at least two cylinder bores are roughened simultaneously by one jet for each cylinder bore.
    Type: Application
    Filed: August 4, 2005
    Publication date: February 9, 2006
    Inventors: Jens Boehm, Dieter Brackenhammer, Stefan Diessner, Axel Heuberger, Patrick Izquierdo, Harald Pfeffinger, Dezsoe Schilling, Juergen Traber, Nazario Vocino, Walter Zwink
  • Publication number: 20060027205
    Abstract: In a process for producing a thermally coated cylinder bearing surface having an end bevel, a cylinder crankcase is cast, those surfaces of the subsequent cylinder barrels which are to be thermally coated are roughened, the cylinder barrels are coated by a thermal spraying process, and the cylinder barrels are remachined to their final dimensions. The cylinder bore is provided with an end bevel on the crankshaft side.
    Type: Application
    Filed: August 3, 2005
    Publication date: February 9, 2006
    Inventors: Jens Boehm, Dieter Brackenhammer, Stefan Diessner, Axel Heuberger, Patrick Izquierdo, Harald Pfeffinger, Dezsoe Schilling, Juergen Traber, Nazario Vocino, Walter Zwink
  • Publication number: 20060011151
    Abstract: In an internal combustion engine having a coolant circuit which comprises a first coolant line for the cylinder block and a second coolant line for the cylinder head of the engine, with the cylinder head having at least one inlet valve and at least one outlet valve per cylinder, an additional coolant duct provided in the cylinder head in close proximity to the valves is connected to the second coolant line for directly supplying coolant to the area of the cylinder outlet valves.
    Type: Application
    Filed: August 17, 2005
    Publication date: January 19, 2006
    Inventors: Jurgen Huter, Bernhard Jutz, Johannes Leweux, Harald Pfeffinger, Heiko Sass, Timo Schmidt, Karsten Unger
  • Publication number: 20060000095
    Abstract: Internal combustion engine with bearing shells, which are formed essentially by thermal sprayed bearing layers, wherein the thermal sprayed bearing layers are formed by at least two slide bearing materials with different hardness, which are spatially separated from each other and are provided on the outer surface of the bearing shell, as well as process for production of bearing shells for internal combustion engines including the steps: mechanical conditioning of the bearing surface coating of the bearing surface with the materials of the bearing shell by thermal spray processes finishing flattening processing of the applied layer wherein as bearing shell at least two slide bearing materials with different hardness were deposited separated spatially from each other, wherein the materials are in contact with each other via interlayers or joint layers.
    Type: Application
    Filed: June 16, 2005
    Publication date: January 5, 2006
    Inventors: Jochen Betsch, Florian Lampmann, Harald Pfeffinger, Franz Rueckert, Frank Streicher, Torsten Wittrowski
  • Publication number: 20050034700
    Abstract: In a process for producing a valve seat for a cylinder head of an internal combustion engine, by introduction of energy a filler material is fused to the cylinder head at the location at which the valve seat is to be formed. The filler material used is an alloy or mixture of an aluminum-iron alloy and at least one further constituent.
    Type: Application
    Filed: October 18, 2002
    Publication date: February 17, 2005
    Inventors: Juergen Clause, Reiner Heigl, Harald Pfeffinger
  • Patent number: 6772715
    Abstract: In a cooling circuit of a liquid-cooled internal combustion engine of a motor vehicle having a coolant pump, an electrical mixing valve, a radiator, a heater, an engine-oil heat exchanger, a transmission-oil cooler for transferring heat to the ambient air, a transmission-oil/cooling water heat exchanger for transferring heat between the transmission oil and the cooling water arranged in parallel flow circuit with the transmission-oil cooler, and an actuator for controlling the oil flow distribution, an electrical mixing valve is arranged in the cooling water line to the radiator/transmission-oil cooler and the transmission-oil/cooling water heat exchanger, such that the heat transfer in the transmission-oil/cooling water heat exchanger can be controlled by controlling the coolant flows through the transmission oil/cooling water heat exchanger and the radiator.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: August 10, 2004
    Assignee: DaimlerChrysler A.G.
    Inventors: Harald Pfeffinger, Heiko Sass
  • Publication number: 20030116105
    Abstract: In a cooling circuit of a liquid-cooled internal combustion engine of a motor vehicle having a coolant pump, an electrical mixing valve, a radiator, a heater, an engine-oil heat exchanger, a transmission-oil cooler with a heat flux from the transmission oil to the ambient air, a transmission-oil heat exchanger providing for a heat flux between the transmission oil and the cooling water and being arranged in parallel flow circuit with the transmission-oil cooler, and an actuator for controlling the oil flow distribution, an electrical mixing valve is arranged between the transmission-oil cooler and the transmission-oil heat exchanger, such that the heat transfer in the transmission-oil heat exchanger can be controlled by the electrical mixing valve by controlling the coolant flow through the transmission oil heat exchanger and the radiator.
    Type: Application
    Filed: December 13, 2002
    Publication date: June 26, 2003
    Inventors: Harald Pfeffinger, Heiko Sass
  • Patent number: 6515254
    Abstract: A method for surface working a tribological coating of a supereutectic aluminum-silicon alloy or an aluminum-silicon composite material with a coating structure includes machining the surface dry, without lubricant, in a one-step process, with a cutting tool having a cutting material containing diamond. The surface treating may be followed by a one-step finish honing or one-step texturing process.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: February 4, 2003
    Assignee: DaimlerChrysler AG
    Inventors: Markus Beck, Tilmann Haug, Patrick Izquierdo, Michael Lahres, Peter Linden, Matthias Merkel, Harald Pfeffinger