公开(公告)号：US20210108542A1

公开(公告)日：2021-04-15

申请号：US16956380

申请日：2017-12-21

Applicant: VOLVO TRUCK CORPORATION

Inventor： Philippe GRYNBERG ,  Romain RIVIERE ,  Damien DIDIOT ,  Arnaud ROQUE ,  Foudil ABDERRAHIM

IPC: F01L1/08 ,  F01L1/18 ,  F01L13/06 ,  F01L1/26 ,  F01L1/053

Abstract: A valve actuation system for an internal combustion engine The valve actuation system (S) for an internal combustion engine comprises: ·a rocker (6) pivotably mounted around a pivot axis (A6), comprising: ·a driven end portion (62) for cooperating with a rotating cam including a main bump and at least one smaller auxiliary bump; ·an actuating end portion (63) including a piston (8) for opening at least one valve of the engine following the cooperation of the driven end portion (62) with a bump of the cam, the piston (8) being slidably mounted relative to the rocker (6) between a extended position allowing said piston (8) to open said valve when the driven end portion (62) contacts the auxiliary bump, and a retracted position preventing said piston (8) to open said valve when the driven end portion (62) contacts the auxiliary bump; ·a fluid circuit for causing the piston (8) to move from its retracted position to its extended position; ·a reset circuit comprising a reset valve (99) rotatably mounted relative to the rocker (6), between an inactive position, and an active position in which the reset valve (99) causes the fluid to be drained out of the fluid circuit to allow the piston (8) to move towards its retracted position; ·a lever (7) pivotably mounted around a pivot axis (A6), the lever (7) having a driven end portion (72) adapted to cooperate with a rotating reset cam including a bump, and an actuating end portion (73) for rotating the reset valve (99) from its inactive position towards its active position following the cooperation of the lever driven end portion (72) with the bump of the reset cam; ·rotational coupling means (75, 95) between the lever (7) and the reset valve (99), said rotational coupling means having a transmission ratio greater than 1.

公开(公告)号：US20200347753A1

公开(公告)日：2020-11-05

申请号：US16615421

申请日：2018-05-22

Applicant: Bernd Niethammer

Inventor： Bernd Niethammer

IPC: F01L1/08 ,  F01L1/14

Abstract: The disclosure relates 10 a device which is used to adjust the valve stroke of internal combustion engines and has an actuation element for the valve stem. The actuation element is actuated by the camshaft and has a receiving space for a pressure medium. The receiving space is fluidically connected to a reservoir space of an adjustment reservoir. The volume of the reservoir space can be adjusted by means of a reservoir piston. The reservoir piston is loaded toward the reservoir space with a force that is greater than the force applied by the pressure medium and that is less than the restoring force acting on the piston.

公开(公告)号：US10794242B2

公开(公告)日：2020-10-06

申请号：US16078723

申请日：2016-03-14

Applicant: VOLVO TRUCK CORPORATION

Inventor： Per Persson

IPC: F01L13/00 ,  F01L1/18 ,  F01L1/26 ,  F01L13/06 ,  F01L1/24 ,  F01L1/08 ,  F01L1/14 ,  F01L1/46 ,  F01L1/20

Abstract: A gas valve actuation device for an internal combustion engine includes a first arrangement for actuating two gas valves in a first lift event, a second arrangement for selectively actuating a first one of the two gas valves in a second lift event, a fluid circuit for controlling actuation of the first gas valve in the second lift event, wherein the fluid circuit includes a first fluid circuit valve which is arranged to be controlled by the first actuation arrangement.

公开(公告)号：US10753239B2

公开(公告)日：2020-08-25

申请号：US15615595

申请日：2017-06-06

Applicant: Vianney Rabhi

Inventor： Vianney Rabhi

IPC: F01M1/06 ,  F04B53/08 ,  F04B53/14 ,  F04B53/18 ,  F16J1/00 ,  F03C1/28 ,  F04B1/124 ,  F04B1/0408 ,  F01C13/04 ,  F01C20/26 ,  F01L9/02 ,  F01M9/10 ,  F01L1/08 ,  F01M11/00

Abstract: The hydraulic piston (1) constitutes a hydraulic chamber (5) with a cylinder (4) and has a cylindrical body (6) connected—from the side of the chamber (5)—by a link-stop valve (3) to a cooling and lubricating gasket valve (2) which is passed right through by a flow calibration opening (27), the valve (2) being able to move in longitudinal translation over a short stroke with respect to the body (6) or to be held at a distance from the body (6) by the valve link-stop (3), a valve return spring (30) tending to move the valve (2) away from the cylindrical body (6).

公开(公告)号：US10677111B2

公开(公告)日：2020-06-09

申请号：US15717850

申请日：2017-09-27

Applicant: Ford Global Technologies, LLC

Inventor： Danny Nakhle ,  Kevin Shinners ,  Robert Stephen Furby

IPC: F01L13/00 ,  F01L1/24 ,  F01L1/047 ,  F01L1/08 ,  F01L1/18 ,  F01L1/14 ,  F01L1/053 ,  F01L1/20 ,  F02B73/00

Abstract: Methods and systems are provided for an engine including cams having different lobe profiles. In one example, cams of a first cam group drive a plurality of deactivatable cylinder valves and cams of a second cam group drive a plurality of non-deactivatable cylinder valves. The cams of the first cam group include a different lobe profile relative to cams of the second cam group.

公开(公告)号：US10669900B2

公开(公告)日：2020-06-02

申请号：US16318343

申请日：2017-07-20

Applicant: AVL LIST GMBH

Inventor： Andreas Zurk ,  Martin Klampfer ,  Gernot Hirschl

IPC: F01L3/20 ,  F01L13/06 ,  F01L1/08 ,  F01L1/18 ,  F02D13/04 ,  F01L13/00 ,  F02D13/02 ,  F01L1/344 ,  F01L1/26 ,  F01L3/22 ,  F16K1/54 ,  F01L3/00

Abstract: Aspects of the present disclosure are directed to an internal combustion engine having a valve actuation device and at least one first exhaust valve and one second exhaust valve per cylinder. The first and second exhaust valves may be actuated together in at least one operating area of the internal combustion engine, via an exhaust valve bridge and a first valve lifter, by a first cam lobe of a first exhaust cam arranged on a camshaft. The camshaft having a second exhaust cam with at least one additional cam lobe and at least one second cam lobe A transmission device being arranged in the functional path between the second exhaust cam and the second exhaust valve, the transmission device allowing an idle stroke to be activated or deactivated. The first exhaust cam and the second exhaust cam are configured and arranged to be rotatable relative to one another.

公开(公告)号：US10605125B2

公开(公告)日：2020-03-31

申请号：US16194870

申请日：2018-11-19

Applicant: Eaton Corporation

Inventor： James E. McCarthy ,  Matthew Vance

IPC: F01L1/00 ,  F01L1/18 ,  F01L13/00 ,  F02M26/01 ,  F01L1/047 ,  F01L1/46 ,  F02D13/02 ,  F01L1/24 ,  F01L1/08 ,  F01L1/20

Abstract: A rocker arm assembly includes an outer arm having first and second low lift lobe contacting surfaces, an inner arm, and a latch assembly. The inner arm includes first and second opposed sidewalls extending between a first end and a second end, and a high lift lobe contacting surface disposed between the first and second opposed sidewalls. The first end is pivotably secured to the outer arm and operably associated with an engine valve, and the second end is operably associated with a lash adjuster and defining a latch bore. The latch assembly is movable between a first configuration and a second configuration. In the first configuration, the latch assembly engages the outer arm such that the outer arm rotates with the inner arm, and in the second configuration, the latch assembly disengages the outer arm such that the outer arm rotates independently from the inner arm.

公开(公告)号：US10590834B2

公开(公告)日：2020-03-17

申请号：US15936713

申请日：2018-03-27

Applicant: Quest Engines, LLC ,  Steve Blom

Inventor： Elario Dino Dalmas, II ,  Roy A. Blom

IPC: F02B33/04 ,  F02B33/26 ,  F02F3/28 ,  F16C3/10 ,  F02B33/30 ,  F01L3/20 ,  F02B29/04 ,  F02F1/18 ,  F01L13/00 ,  F01L1/08 ,  F02F3/02 ,  F01L1/18 ,  F01L1/28 ,  F01L1/46 ,  F16C3/14 ,  F02B33/12 ,  F01L1/24 ,  F01L1/053

Abstract: Internal combustion engines that use the pumping motion of the engine pistons to supercharge the cylinder with air/charge are disclosed. The pistons may include a skirt with a field of pockets that provide a ringless, non-lubricated, seal equivalent. The piston heads may be domed with one or more depressions to facilitate the movement of air/charge in the cylinder. The engines also may have non-circular, preferably rectangular, cross-section pistons and cylinders. The engines also may use multi-stage poppet valves in lieu of conventional poppet valves, and may include a split crankshaft. The engines also may operate in an inverted orientation in which the piston is closer to the local gravitationally dominant terrestrial body's center of gravity at top dead center position than at bottom dead center position.

公开(公告)号：US20190309666A1

公开(公告)日：2019-10-10

申请号：US16314878

申请日：2017-06-15

Applicant: Nissan Motor Co., Ltd.

Inventor： Jean-François MOULIN ,  Etienne DE MALET ,  Sylvie FOREAU-JOHAN

IPC: F01M9/10 ,  F16N7/36 ,  F01L1/047 ,  F01L1/08

Abstract: A valve actuating device includes a camshaft, a cam, and a lubricant conducting device. The camshaft has an oil supply duct extending in a longitudinal direction of the camshaft and a discharge orifice extending in a radial direction of the camshaft and in fluid communication with the oil supply duct. The cam is fixedly mounted to the camshaft to rotate with the camshaft, the cam having a contact surface and a lateral wall facing in an axial direction of the camshaft towards the discharge orifice. The lubricant conducting device is arranged to direct oil over the lateral wall of the cam towards the contact surface.

公开(公告)号：US10428746B2

公开(公告)日：2019-10-01

申请号：US15532237

申请日：2014-12-08

Applicant: Wärtsilä Finland Oy

Inventor： Sören Hedvik ,  Magnus Sundsten

IPC: F01L1/34 ,  F02D13/02 ,  F01L1/14 ,  F01L1/16 ,  F01L1/26 ,  F01L1/08 ,  F01L9/02 ,  F01L13/00

Abstract: A method of controlling an operation of an inlet valve system arranged in connection with each cylinder of an internal combustion piston engine, includes monitoring at least one parameter relating to engine load conditions, controlling using a primary control procedure an opening and closing timing of an inlet valve in response to the at least one parameter, and feeding charge air into the cylinder when the inlet valve is open. In a secondary control procedure a parameter relating to engine load conditions is measured and the closing timing of the inlet valve of the inlet valve system is controlled in response to the at least parameter independently from and with higher priority than the primary control procedure.