Patents by Inventor Stefan SPERRFECHTER

Stefan SPERRFECHTER 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).

  • Publication number: 20230398854
    Abstract: A dual-clutch transmission includes two clutches for respectively connecting an input shaft in a rotationally fixed manner to a sub-transmission input shaft. Two layshafts each have one output gear arranged coaxially with respect thereto. A first, second, and third forward idler gear are each arranged coaxially with respect to the one layshaft. A fourth and fifth forward idler gear are each arranged coaxially with respect to the other layshaft. One of the output gears is a larger output gear having a greater diameter or a greater number of teeth than the other, smaller output gear. The first forward idler gear forms a second gear stage, the second forward idler gear forms a third gear stage, etc. The gear stages have a decreasing transmission ratio in the order stated.
    Type: Application
    Filed: July 27, 2021
    Publication date: December 14, 2023
    Inventors: Carsten GITT, Andreas KOLB, Tobias HAERTER, Juergen SCHWEITZER, Jonathan ZEIBIG, Peter HAHN, Jakub ROMANIAK, Stefan SPERRFECHTER, Klaus RIEDL, Tobias SCHILDER
  • Patent number: 11293526
    Abstract: A hybrid dual-clutch transmission includes a first sub-transmission and a second sub-transmission, a first countershaft, a first output gear non-rotatably connected to the first countershaft, a second countershaft, a dual clutch, which has a first clutch assigned to the first sub-transmission and a second clutch assigned to the second sub-transmission, a separating clutch and an electric motor. The electric motor is or can be coupled to the separating clutch and to the dual clutch.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: April 5, 2022
    Assignee: DAIMLER AG
    Inventors: Carsten Gitt, Tobias Haerter, Peter Hahn, Andreas Kolb, Jakub Romaniak, Juergen Schweitzer, Stefan Sperrfechter, Jonathan Zeibig
  • Patent number: 11268579
    Abstract: A hybrid dual-clutch transmission includes a first countershaft sub-transmission, a second countershaft sub-transmission, a first clutch assigned to the first countershaft sub-transmission, a first actuating chamber, a first centrifugal oil chamber, a first power transmission region, a first inner lamella carrier, and a first outer lamella carrier. The transmission also includes a second clutch assigned to the second countershaft sub-transmission, a second actuating chamber, a second centrifugal oil chamber, a second power transmission region, a second inner lamella carrier, and second outer lamella carrier. The transmission further includes a third clutch to connect to an internal combustion engine and which has a third actuating chamber, a third centrifugal oil chamber, a third power transmission region, a third inner lamella carrier, and a third outer lamella carrier.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: March 8, 2022
    Assignee: DAIMLER AG
    Inventors: Peter Hahn, Stefan Sperrfechter, Tobias Haerter, Juergen Schweitzer, Jonathan Zeibig, Andreas Kolb
  • Publication number: 20210396278
    Abstract: A hybrid dual-clutch transmission includes a first countershaft sub-transmission, a second countershaft sub-transmission, a first clutch assigned to the first countershaft sub-transmission, a first actuating chamber, a first centrifugal oil chamber, a first power transmission region, a first inner lamella carrier, and a first outer lamella carrier. The transmission also includes a second clutch assigned to the second countershaft sub-transmission, a second actuating chamber, a second centrifugal oil chamber, a second power transmission region, a second inner lamella carrier, and second outer lamella carrier. The transmission further includes a third clutch to connect to an internal combustion engine and which has a third actuating chamber, a third centrifugal oil chamber, a third power transmission region, a third inner lamella carrier, and a third outer lamella carrier.
    Type: Application
    Filed: September 27, 2019
    Publication date: December 23, 2021
    Inventors: Peter HAHN, Stefan SPERRFECHTER, Tobias HAERTER, Juergen SCHWEITZER, Jonathan ZEIBIG, Andreas KOLB
  • Publication number: 20210010567
    Abstract: A hybrid dual-clutch transmission includes a first sub-transmission and a second sub-transmission, a first countershaft, a first output gear non-rotatably connected to the first countershaft, a second countershaft, a dual clutch, which has a first clutch assigned to the first sub-transmission and a second clutch assigned to the second sub-transmission, a separating clutch and an electric motor. The electric motor is or can be coupled to the separating clutch and to the dual clutch.
    Type: Application
    Filed: July 7, 2020
    Publication date: January 14, 2021
    Inventors: Carsten GITT, Tobias HAERTER, Peter HAHN, Andreas KOLB, Jakub ROMANIAK, Juergen SCHWEITZER, Stefan SPERRFECHTER, Jonathan ZEIBIG
  • Publication number: 20170191560
    Abstract: A dual clutch transmission device is disclosed. The dual clutch transmission device has a transmission device with a transmission housing, with a coupling housing positioned within the transmission housing and with a lubricant reservoir to receive a lubricant for the transmission device, which includes an oil trap ring connected at least indirectly with the transmission housing, which at least partially surrounds the coupling housing. The oil trap ring has a side facing the coupling housing which is primarily designed as an oil guide surface and which has at least one groove which is intended to guide lubricant into the lubricant reservoir. The dual clutch transmission device also has a gear set with a dry sump to lubricate the gear set.
    Type: Application
    Filed: May 22, 2015
    Publication date: July 6, 2017
    Applicant: Daimler AG
    Inventors: Stefan SPERRFECHTER, Heinrich STRAUB, Josep Maria BOU ROMANO, Tobias HAERTER, Peter HAHN, Jakub ROMANIAK, Juergen SCHWEITZER
  • Publication number: 20160298733
    Abstract: The invention relates to a dual clutch transmission comprising two input shafts (11a, 12a; 11b, 12b) which are provided for respectively linking to a power shift clutch (K1a, K2a; K1b, K2b), a first countershaft (13a; 13b) arranged offset parallel to the input shafts (11a, 12a; 11b, 12b), a second countershaft (14a; 14b) arranged offset parallel to the input shafts (11a, 12a; 11b, 12b), at least five gear wheel planes (Z1a-Z5a; Z1b-Z5b) which each comprise a fixed gear (Z11a-Z51a; Z11b-Z51b) permanently connected in a rotationally fixed manner to one of the input shafts (11a, 12a; 11b, 12b), wherein one of the gear wheel planes (Z4a; Z4b) comprises an idler gear wheel (Z42a; Z42b) arranged coaxially relative to the first countershaft (13a; 13b) and an idler gear wheel (Z43a; Z43b) arranged coaxially relative to the second countershaft (14a; 14b), which form a gear wheel pair for shifting into at least one reverse transmission gear (R1a, R2a), at least nine shift units (S1a-S9a; S1b-S9b) for producing an opera
    Type: Application
    Filed: November 4, 2014
    Publication date: October 13, 2016
    Applicant: Daimler AG
    Inventors: Helmut BENDER, Josep Maria BOU ROMANO, Heinrich STRAUB, Peter HAHN, Stefan SPERRFECHTER, Juergen SCHWEITZER, Tobias HAERTER, Jakub ROMANIAK
  • Patent number: 8991576
    Abstract: In a torque converter device for a motor vehicle having a single-piece housing element which, for drivingly interconnecting a torque converter and an internal combustion engine, wherein the housing element forms a disk carrier accommodating at least one disk of a separating clutch which is provided for mechanically connecting and disconnecting the internal combustion engine to and from the torque converter device, the housing element is provided with at least one actuating piston receptacle forming a pressure chamber with an actuating piston disposed therein for actuating the separating clutch.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: March 31, 2015
    Assignee: Daimler AG
    Inventors: Stefan Sperrfechter, Tobias Haerter, Heinrich Straub, Bernhard Ziegler, Tobias Schuster
  • Publication number: 20140144742
    Abstract: In a torque converter device for a motor vehicle having a single-piece housing element which, for drivingly interconnecting a torque converter and an internal combustion engine, wherein the housing element forms a disk carrier accommodating at least one disk of a separating clutch which is provided for mechanically connecting and disconnecting the internal combustion engine to and from the torque converter device, the housing element is provided with at least one actuating piston receptacle forming a pressure chamber with an actuating piston disposed therein for actuating the separating clutch.
    Type: Application
    Filed: February 6, 2014
    Publication date: May 29, 2014
    Applicant: DAIMLER AG
    Inventors: Stefan SPERRFECHTER, Tobias HAERTER, Heinrich STRAUB, Bernhard ZIEGLER, Tobias SCHUSTER