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公开(公告)号：US20240287920A1
公开(公告)日：2024-08-29
申请号：US18589518
申请日：2024-02-28
CPC分类号： F01L1/2416 , F01L1/182 , F01L1/26 , F01L2001/2444
摘要： A rocker arm comprises an actuator piston slidably disposed in an actuator piston bore formed in a motion imparting end thereof. A lash adjustment assembly is disposed in the motion imparting end and comprises an internal bore. A hydraulic passage is in fluid communication with the actuator piston bore and the internal bore. A resetting assembly is disposed in the lash adjustment assembly and comprises a reset slider and a checking element in fluid communication with the internal bore. The reset slider is slidably disposed in the internal bore and has a first end configured to engage a valve train component or engine valve, and has a second end with a resetting pin disposed thereon configured to contact and place the checking element in an unchecked state in response to positioning of the rocker arm when the first end contacts the valve train component or engine valve.
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公开(公告)号：US12055075B1
公开(公告)日：2024-08-06
申请号：US18542631
申请日：2023-12-16
CPC分类号： F01L13/0036 , F01L1/181 , F01L1/267 , F01L1/46 , F01L2001/186 , F01L1/2411 , F01L2001/467
摘要： A system for actuating at least one engine valve comprises an output rocker operatively connected to the at least one engine valve. A first rocker assembly is operatively connected to a first valve actuation motion source. The first rocker assembly comprises a first input rocker arranged in series with a first lost motion component, wherein the first input receives first valve actuation motions from the first valve actuation motion source and the first lost motion component is operatively connected to the output rocker. A second rocker assembly is operatively connected to a second valve actuation motion source. The second rocker assembly comprises a second input rocker arranged in series with a second lost motion component, wherein the second input rocker receives second valve actuation motions from the second valve actuation motion source and the second lost motion component is operatively connected to the output rocker.
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公开(公告)号：US20240125253A1
公开(公告)日：2024-04-18
申请号：US18484053
申请日：2023-10-10
发明人： Bruce A. SWANBON , Justin D. BALTRUCKI , Robb JANAK , G. Michael GRON, JR. , John MANDELL , Marc B. SILVA , Tyler HINES , Matei ALEXANDRU , Austen P. METSACK , Gabriel S. ROBERTS , P. Douglas AUBIN , Nathaniel P. HASSALL , John Jerl PURCELL, III , Adam C. CECIL , David M. BARNES
摘要： A valve actuation system comprises a first arm having a first arm contact surface and operatively connected to a valve actuation motion. A second arm having a second arm contact surface is operatively connected to the at least one engine valve. A discrete lost motion device is provided that is controllable between a first, motion conveying state and a second, motion absorbing state. The discrete lost motion devices comprises a plunger contact surface and a housing contact surface. The housing contact surface is configured to engage one of the first or second arm contact surfaces, and the plunger contact surface is configured to engage another of the first and the second arm contact surfaces. The first and second arm contact surfaces, the housing contact surface and the first plunger contact surface are configured to support the discrete lost motion device between the first arm and the second arm.
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公开(公告)号：US20230151743A1
公开(公告)日：2023-05-18
申请号：US18150622
申请日：2023-01-05
摘要： Systems for valve actuation in internal combustion engines provide for control of rocker arms and other valvetrain components by utilizing biasing and stroke limited components. Such features may be implemented in any valvetrain component, including e-foot assemblies or pushrod assemblies. The biasing component may bias the cam side of a lost motion rocker toward the cam. The components may be extendable to permit a biasing mechanism to keep the valvetrain components in a controlled position at all times. Stroke limiting features may facilitate the formation of small gaps between valvetrain components during the engine cycle for improved lubrication. Stroke limiting features may also retain valvetrain components in an assembled configuration even when not installed in an engine or valve actuation system.
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公开(公告)号：US11519307B2
公开(公告)日：2022-12-06
申请号：US17805343
申请日：2022-06-03
发明人： Justin D. Baltrucki
摘要： A valve actuation system comprises a valve actuation motion source configured to provide a main valve actuation motion and an auxiliary valve actuation motion for actuating at least one engine valve via a valve actuation load path. A lost motion subtracting mechanism is arranged in a pre-rocker arm valve train component and configured, in a first default operating state, to convey at least the main valve actuation motion and configured, in a first activated state, to lose the main valve actuation motion and the auxiliary valve actuation motion. Additionally, a lost motion adding mechanism is arranged in a valve bridge and configured, in a second default operating state, to lose the auxiliary valve actuation motion and configured, in a second activated state, to convey the auxiliary valve actuation motion, wherein the lost motion adding mechanism is in series with the lost motion subtracting mechanism in the valve actuation load path.
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公开(公告)号：US11162437B2
公开(公告)日：2021-11-02
申请号：US17301414
申请日：2021-04-01
IPC分类号： F01L1/34 , F02D13/04 , F02D13/06 , F01L1/26 , F01L13/06 , F02D13/02 , F01L1/18 , F01L13/08 , F01L13/00
摘要： A system and associated methods for controlling valve motion in internal combustion engines provide a pulsing component for energizing a solenoid control valve in pulsatile fashion to cause a transient pressure change in a hydraulic network linking the control valve to a common, paired set of intake and exhaust main event deactivation mechanisms, which may be provided in respective valve bridges. The pressure change results in hydraulic deactivation of main event motion of the exhaust valve while avoiding deactivation of main intake event motion and thereby preserving intake main event valve motion, and supporting use of the intake main event motion for additional braking or other operations. The systems and methods are particularly suited for engine environments that employ cylinder deactivation (CDA) combined with high-power density (HPD) engine braking.
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公开(公告)号：US11156135B2
公开(公告)日：2021-10-26
申请号：US16513608
申请日：2019-07-16
摘要： A combined dedicated braking and EEVO lost motion valve actuation systems for internal combustion engines provide subsystems for braking events and EEVO events on one or more cylinders. Various control strategies may utilize braking and EEVO capabilities to module one or more engine parameters, including aftertreatment temperature and engine load.
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公开(公告)号：US20210025341A1
公开(公告)日：2021-01-28
申请号：US16947239
申请日：2020-07-24
发明人： Justin D. BALTRUCKI
摘要： In an embodiment, an internal combustion engine comprises a plurality of cylinders, each of the plurality of cylinders comprising at least one intake deactivator operatively connected to at least one intake valve and at least one exhaust deactivator operatively connected to at least one exhaust. An intake deactivator controller is operatively connected to the intake deactivators associated with at least two cylinders of the plurality of cylinders, and an exhaust deactivator controller is operatively connected to the exhaust deactivators associated with the at least two cylinders. In another embodiment, only a single deactivator controller is operatively connected to both the intake deactivators and to the exhaust deactivators associated with the at least two cylinders of the plurality of cylinders.
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公开(公告)号：US10329969B2
公开(公告)日：2019-06-25
申请号：US15522529
申请日：2015-10-23
摘要： A system that provides adjustable actuation timing of one or more valve(s) (16) in a piston engine includes a position sensor (12) and a variable valve actuation assembly (10). The valve(s) (16) can be intake and/or exhaust valves in an internal combustion engine of an automobile. The position sensor (12) takes position readings of the valve(s) (16) as the valve(s) (16) actuate in the piston engine. The variable valve actuation assembly (10) controls actuation timing of the valve(s) (16). Actuation timing of the valve(s) (16) is adjustable based, in part or more, upon one or more position reading(s) of the position sensor (12). The variable valve actuation assembly (10) can be a lost motion assembly (10).
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10.发明授权公开(公告)号：US09739184B2
公开(公告)日：2017-08-22
申请号：US15184904
申请日：2016-06-16
CPC分类号： F01L13/08 , F01L1/181 , F01L13/0015 , F01L13/06 , F01L2001/186 , F01L2013/0094 , F01L2760/001 , F01L2800/01 , F01L2800/03 , F01L2810/03 , F01L2820/031 , F01L2820/034 , F02D13/0246 , F02D2013/0292 , F02M31/042 , Y02T10/126
摘要： Start-up of an internal combustion engine comprises maintaining one or more engine valves in an engine cylinder in a continuously open state for more than one engine cycle during engine cranking. When it is determined that an engine parameter or transmission oil pressure has reached a predetermined value, maintenance of the one or more engine valves in the continuously open state is discontinued and fuel is subsequently provided to the engine cylinder for engine start-up. In various embodiments, the engine parameter may comprise an engine temperature parameter, an engine pressure parameter or an engine electrical parameter.
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