Patents by Inventor Matthias LAHR

Matthias LAHR 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: 12276213
    Abstract: The invention relates to a valve train (10) for an internal combustion engine, having a first rocker arm (32) which is mounted on a rocker shaft (30) so as to be pivotable around a pivot axis (44) in relation to the rocker shaft (30), having a first gas exchange valve (18) which can be actuated by pivoting the rocker arm (32) around the pivot axis (44) in relation to the rocker shaft (30) and can thus be moved translationally, and having a second gas exchange valve (20).
    Type: Grant
    Filed: November 21, 2022
    Date of Patent: April 15, 2025
    Assignee: DAIMLER TRUCK AG
    Inventors: Matthias Lahr, Patrick Rohde
  • Publication number: 20250003358
    Abstract: The invention relates to a valve train (10) for an internal combustion engine, having a first rocker arm (32) which is mounted on a rocker shaft (30) so as to be pivotable around a pivot axis (44) in relation to the rocker shaft (30), having a first gas exchange valve (18) which can be actuated by pivoting the rocker arm (32) around the pivot axis (44) in relation to the rocker shaft (30) and can thus be moved translationally, and having a second gas exchange valve (20).
    Type: Application
    Filed: November 21, 2022
    Publication date: January 2, 2025
    Inventors: Matthias LAHR, Patrick ROHDE
  • Patent number: 12140057
    Abstract: A valve train for an internal combustion engine includes an outlet valve, an engine brake rocker shaft that is pivotable around a pivot axis, where the outlet valve is operable by pivoting the engine brake rocker shaft during an engine braking operation of the internal combustion engine, a camshaft which has a cam via which the engine brake rocker shaft is pivotable around the pivot axis, and a spring element via which the engine brake rocker shaft is tensioned against the camshaft. The spring element is a leaf spring.
    Type: Grant
    Filed: March 7, 2022
    Date of Patent: November 12, 2024
    Assignee: Daimler Truck AG
    Inventor: Matthias Lahr
  • Publication number: 20240301809
    Abstract: A valve train for an internal combustion engine includes an outlet valve, an engine brake rocker shaft that is pivotable around a pivot axis, where the outlet valve is operable by pivoting the engine brake rocker shaft during an engine braking operation of the internal combustion engine, a camshaft which has a cam via which the engine brake rocker shaft is pivotable around the pivot axis, and a spring element via which the engine brake rocker shaft is tensioned against the camshaft. The spring element is a leaf spring.
    Type: Application
    Filed: March 7, 2022
    Publication date: September 12, 2024
    Inventor: Matthias LAHR
  • Publication number: 20240141809
    Abstract: A valve bridge for a valve train of an engine includes a bridge operating region via which the valve bridge can be operated by a first rocker arm and is movable translationally in a first operating direction, a first valve operating region via which a first gas exchange valve of the engine can be operated, and a second valve operating region via which a second gas exchange valve of the engine can be operated. The first valve operating region has a through opening continuous along the first operating direction, a first longitudinal region in which the through opening is completely continuously closed in its peripheral direction, and a second longitudinal region directly connected to the first longitudinal region in the first operating direction and in which the through opening is open along its peripheral direction at a first location in a first opening direction perpendicular to the first operating direction.
    Type: Application
    Filed: February 17, 2022
    Publication date: May 2, 2024
    Inventor: Matthias LAHR
  • Patent number: 11767773
    Abstract: A valve actuation device for actuating a first and second gas exchange valve of an internal combustion engine. A tilting lever is pivotable between a first starting position and a first actuation position and a valve bridge is movable between a second starting position and a second actuation position. A coupling device is switchable between a locking state, in which the valve bridge is movable out of the second starting position into the second actuation position via the coupling device by the tilting lever, and an unlocking state, in which, despite a movement of the tilting lever out of the first starting position into the first actuation position, there is no movement of the valve bridge out of the second starting position into the second actuation position. The coupling device is held on the tilting lever such that the coupling device is pivotable with the tilting lever.
    Type: Grant
    Filed: December 3, 2020
    Date of Patent: September 26, 2023
    Assignee: Daimler Truck AG
    Inventor: Matthias Lahr
  • Publication number: 20230016116
    Abstract: A valve actuation device for actuating a first and second gas exchange valve of an internal combustion engine. A tilting lever is pivotable between a first starting position and a first actuation position and a valve bridge is movable between a second starting position and a second actuation position. A coupling device is switchable between a locking state, in which the valve bridge is movable out of the second starting position into the second actuation position via the coupling device by the tilting lever, and an unlocking state, in which, despite a movement of the tilting lever out of the first starting position into the first actuation position, there is no movement of the valve bridge out of the second starting position into the second actuation position. The coupling device is held on the tilting lever such that the coupling device is pivotable with the tilting lever.
    Type: Application
    Filed: December 3, 2020
    Publication date: January 19, 2023
    Inventor: Matthias LAHR
  • Patent number: 11384661
    Abstract: A valve train includes a camshaft which has a cam group having a firing cam and a braking cam. A first cam follower is assigned to the firing cam with the first cam follower being provided in a firing mode for actuating a gas exchange valve. A second cam follower is assigned to the braking cam which is provided in a braking mode for actuating the gas exchange valve. A changeover device is provided to changeover between the firing mode and the braking mode. The camshaft has a separate switching cam which, in at least one operating mode, is provided to act directly on a switching element of the changeover device and which is provided for a direct changeover between the firing mode and the braking mode.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: July 12, 2022
    Assignee: Daimler AG
    Inventor: Matthias Lahr
  • Patent number: 11225886
    Abstract: A valve gear has a cam shaft with a firing cam and a braking cam. A first cam follower is allocated to the firing cam with the first cam follower being provided in a firing operation for actuating a gas exchange valve. A second cam follower is allocated to the braking cam with the second cam follower being provided in a braking operation for actuating the gas exchange valve. A changeover device switches between the operations and has a tilting lever mount having a pivotably mounted mounting element on which a tilting lever belonging to the first cam follower and a tilting lever belonging to the second cam follower are pivotably mounted. The tilting lever mount has two mounting screws respectively having a ball head and the ball heads each form a ball joint together with a ball head receiver of the allocated tilting lever.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: January 18, 2022
    Assignee: Daimler AG
    Inventor: Matthias Lahr
  • Publication number: 20200340372
    Abstract: A valve train includes a camshaft which has a cam group having a firing cam and a braking cam. A first cam follower is assigned to the firing cam with the first cam follower being provided in a firing mode for actuating a gas exchange valve. A second cam follower is assigned to the braking cam which is provided in a braking mode for actuating the gas exchange valve. A changeover device is provided to changeover between the firing mode and the braking mode. The camshaft has a separate switching cam which, in at least one operating mode, is provided to act directly on a switching element of the changeover device and which is provided for a direct changeover between the firing mode and the braking mode.
    Type: Application
    Filed: September 21, 2018
    Publication date: October 29, 2020
    Applicant: Daimler AG
    Inventor: Matthias LAHR
  • Publication number: 20200325802
    Abstract: A valve gear has a cam shaft with a firing cam and a braking cam. A first cam follower is allocated to the firing cam with the first cam follower being provided in a firing operation for actuating a gas exchange valve. A second cam follower is allocated to the braking cam with the second cam follower being provided in a braking operation for actuating the gas exchange valve. A changeover device switches between the operations and has a tilting lever mount having a pivotably mounted mounting element on which a tilting lever belonging to the first cam follower and a tilting lever belonging to the second cam follower are pivotably mounted. The tilting lever mount has two mounting screws respectively having a ball head and the ball heads each form a ball joint together with a ball head receiver of the allocated tilting lever.
    Type: Application
    Filed: September 21, 2018
    Publication date: October 15, 2020
    Applicant: Daimler AG
    Inventor: Matthias LAHR
  • Patent number: 10731526
    Abstract: An engine brake device is disclosed. The engine brake device includes at least one intake camshaft which includes at least one intake cam group having at least one firing cam and at least one braking cam, at least one intake cam follower that is assigned to the firing cam and is provided for actuating at least one intake valve in a firing mode, at least one braking intake cam follower that is assigned to the braking cam and is provided for actuating the at least one intake valve in a braking mode, and a switchover device that is assigned to the intake camshaft and is provided for the purpose of translating a torque of the intake camshaft into a force for switching between the firing mode and the braking mode.
    Type: Grant
    Filed: May 23, 2015
    Date of Patent: August 4, 2020
    Assignee: Daimler AG
    Inventor: Matthias Lahr
  • Patent number: 10458295
    Abstract: A valve train device includes a camshaft, a first valve actuating unit for actuating at least one first gas exchange valve, and a second valve actuating unit for actuating at least one second gas exchange valve. The first valve actuating unit has at least one first release element connected to the camshaft for conjoint rotation and the second valve actuating unit has at least one second release element connected to the camshaft for conjoint rotation. The release elements are coupled to each other.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: October 29, 2019
    Assignee: Daimler AG
    Inventor: Matthias Lahr
  • Patent number: 10443454
    Abstract: A valve drive device for an internal combustion engine is disclosed. The valve drive device has an axially displaceable cam element and an adjusting device with a first engagement element which displaces the cam element axially into a first switching position and a second engagement element which displaces the cam element axially into a second switching position. The adjusting device has a first slotted guide track in which the first engagement element is guided in the first switching position and a second slotted guide track in which the second engagement element is guided in the second switching position. The first engagement element is positively coupled to the second engagement element. The adjusting device includes a triggering device which holds the first engagement element fixedly in the second switching position counter to a restoring force. A method for axial displacement of a rotating cam element is also disclosed.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: October 15, 2019
    Assignee: Daimler AG
    Inventors: Juergen Bauer, Matthias Lahr, Marc Oliver Wagner, Benjamin Zeller
  • Publication number: 20190010840
    Abstract: A valve train device includes a camshaft, a first valve actuating unit for actuating at least one first gas exchange valve, and a second valve actuating unit for actuating at least one second gas exchange valve. The first valve actuating unit has at least one first release element connected to the camshaft for conjoint rotation and the second valve actuating unit has at least one second release element connected to the camshaft for conjoint rotation. The release elements are coupled to each other.
    Type: Application
    Filed: June 17, 2016
    Publication date: January 10, 2019
    Applicant: Daimier AG
    Inventor: Matthias LAHR
  • Patent number: 10132205
    Abstract: An adjusting device for adjusting valve clearance of a charge-cycle valve of an internal combustion machine is provided. The adjusting device includes a pivoted rocker lever, at one end of which an actuation element is positioned configured to transfer a force to the charge-cycle valve. A transmission element is attached to the actuation element at an opposite end to the charge-cycle valve of which a sleeve area is positioned, which is used to support the transmission element regarding the actuation element. A method for adjusting valve clearance of a charge-cycle valve of an internal combustion machine using an adjusting device is also provided.
    Type: Grant
    Filed: December 6, 2014
    Date of Patent: November 20, 2018
    Assignee: Daimler AG
    Inventor: Matthias Lahr
  • Publication number: 20180142585
    Abstract: An engine brake device is disclosed. The engine brake device includes at least one intake camshaft which includes at least one intake cam group having at least one firing cam and at least one braking cam, at least one intake cam follower that is assigned to the firing cam and is provided for actuating at least one intake valve in a firing mode, at least one braking intake cam follower that is assigned to the braking cam and is provided for actuating the at least one intake valve in a braking mode, and a switchover device that is assigned to the intake camshaft and is provided for the purpose of translating a torque of the intake camshaft into a force for switching between the firing mode and the braking mode.
    Type: Application
    Filed: May 23, 2015
    Publication date: May 24, 2018
    Applicant: Daimler AG
    Inventor: Matthias LAHR
  • Patent number: 9874123
    Abstract: An engine compression brake device is disclosed. The brake device has at least one camshaft which has at least one cam group with at least one firing cam and at least one brake cam, and has at least one cam follower which is functionally assigned to the firing cam and which is provided for actuating at least one gas exchange valve in a firing mode, and has a cam follower which is functionally assigned to the brake cam and which is provided for actuating at least one gas exchange valve in a braking mode. The brake device further has a switchover device which is provided for the switchover between the firing mode and the braking mode, where the switchover device is provided for converting a torque of the camshaft into a force for the switchover between the firing mode and the braking mode.
    Type: Grant
    Filed: October 25, 2014
    Date of Patent: January 23, 2018
    Assignee: Daimler AG
    Inventor: Matthias Lahr
  • Publication number: 20170362964
    Abstract: A valve drive device for an internal combustion engine is disclosed. The valve drive device has an axially displaceable cam element and an adjusting device with a first engagement element which displaces the cam element axially into a first switching position and a second engagement element which displaces the cam element axially into a second switching position. The adjusting device has a first slotted guide track in which the first engagement element is guided in the first switching position and a second slotted guide track in which the second engagement element is guided in the second switching position. The first engagement element is positively coupled to the second engagement element. The adjusting device includes a triggering device which holds the first engagement element fixedly in the second switching position counter to a restoring force. A method for axial displacement of a rotating cam element is also disclosed.
    Type: Application
    Filed: December 2, 2015
    Publication date: December 21, 2017
    Applicant: Daimler AG
    Inventors: Juergen BAUER, Matthias LAHR, Marc Oliver WAGNER, Benjamin ZELLER
  • Publication number: 20170009608
    Abstract: An adjusting device for adjusting valve clearance of a charge-cycle valve of an internal combustion machine is provided. The adjusting device includes a pivoted rocker lever, at one end of which an actuation element is positioned configured to transfer a force to the charge-cycle valve. A transmission element is attached to the actuation element at an opposite end to the charge-cycle valve of which a sleeve area is positioned, which is used to support the transmission element regarding the actuation element. A method for adjusting valve clearance of a charge-cycle valve of an internal combustion machine using an adjusting device is also provided.
    Type: Application
    Filed: December 6, 2014
    Publication date: January 12, 2017
    Applicant: Daimler AG
    Inventor: Matthias LAHR