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公开(公告)号:US12098660B1
公开(公告)日:2024-09-24
申请号:US18224607
申请日:2023-07-21
发明人: Colin Foster
CPC分类号: F01L1/267 , F01L1/181 , F01L1/20 , F01L1/462 , F01L9/20 , F01L13/0005 , F01L2001/467
摘要: A switchable valve bridge for an internal combustion engine is provided that includes an outer housing, an inner housing, a locking collar, and a first ramp. The outer housing includes two valve pallets configured to interface with two poppet valves. The inner housing is slidably disposed within the outer housing. The inner housing has a first locking latch configured to move radially relative to an actuation axis of the inner housing. The locking collar is configured to move axially via an actuation force applied to the locking collar in a first axial direction parallel to the actuation axis. The first ramp is disposed within both the first locking aperture and the locking collar. The first ramp is configured to be actuated by the locking collar such that axial movement of the first ramp causes radial movement of the first locking latch.
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公开(公告)号:US12078089B2
公开(公告)日:2024-09-03
申请号:US18474007
申请日:2023-09-25
CPC分类号: F01L1/181 , F01L13/0005 , F01L2001/186 , F01L2001/467 , F01L2013/001 , F01L13/065 , F01L2820/031
摘要: A rocker arm including a cam side arm and a valve side arm is disclosed. The cam side arm can include a bearing surface, a cam-side pivot extension, and a plunger set seat. The valve side arm can include a rocker shaft bore configured to receive a rocker shaft, a valve-side pivot extension pivotally connected to the cam-side pivot extension, a capsule comprising a plunger set, and a capsule mount configured to receive the capsule. The capsule mount can include a lost motion spring.
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公开(公告)号:US20240280037A1
公开(公告)日:2024-08-22
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:US20240280036A1
公开(公告)日:2024-08-22
申请号:US18444711
申请日:2024-02-18
CPC分类号: F01L1/181 , F01L1/2411 , F01L2305/00 , F01L2820/033
摘要: A rocker arm comprises a hydraulic actuator piston slidably disposed in an actuator bore. An actuator spring is configured to bias the hydraulic actuator piston out of actuator bore and into contact with a valve train component or at least one engine valve, wherein reaction of the hydraulic actuator piston against the valve train component or the at least one engine valve biases a motion receiving portion of the rocker arm into contact with the valve actuation motion source. In an unactuated state of the hydraulic actuator piston, hydraulic fluid is permitted to flow out of the actuator bore and, in an actuated state of the hydraulic actuator piston, hydraulic fluid is locked in the actuator bore.
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公开(公告)号:US11970959B2
公开(公告)日:2024-04-30
申请号:US18485338
申请日:2023-10-12
发明人: Huaxue Tang
摘要: The embodiments of the present disclosure provide a valve actuator for a specialized stationary two-piston hydraulic engine, including a specialized drive cam, an actuator, an oil drive line, and a control valve. A hydraulic linkage is maintained between a primary piston and a secondary piston when the control valve is open, and the oil drive line is drained through the control valve when the control valve is closed. In the present disclosure, by integrating the primary piston and the secondary piston in a specialized actuator, oil consumption is reduced, and with a design of the specialized drive cam, an optimized design of the valve actuator that operates independently of a positive valve mechanism is realized, thus reducing interference and influence of the valve actuator on an operation of the positive valve mechanism.
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公开(公告)号:US20240077005A1
公开(公告)日:2024-03-07
申请号:US18261454
申请日:2022-01-14
发明人: Zdenek HÜBNER
CPC分类号: F01L13/06 , F01L1/181 , F01L13/0005
摘要: A shifting stopper latch assembly for a rocker arm can comprise a latch assembly housing, comprising a latch assembly oil feed, a piston bore, a stopper bore comprising a stopper opening, and a spring seat. A piston can be in the piston bore. A shifting stopper can be in the stopper bore and the shifting stopper can comprise a projection protruding out of the stopper opening. A return spring can be configured in the spring seat to bias the shifting stopper and the plunger away from the spring seat and towards the latch assembly oil feed. A valvetrain can comprise a rocker arm configured to actuate against a cam on a cam rail, and the rocker arm can comprise a latch surface configured to selectively engage and disengage the projection.
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公开(公告)号:US11905859B2
公开(公告)日:2024-02-20
申请号:US17800072
申请日:2021-02-19
发明人: Andrei D. Radulescu , Ramy Rezkalla , Daniel Nelson , James Sheren , Michele Angelo Cecchi , Marco Ravoni , Maria Letizia Ciardullo
CPC分类号: F01L1/181 , F01L1/20 , F01L13/065 , F01L2001/467 , F01L2013/001 , F01L2013/105 , F01L2305/00
摘要: A castellation assembly comprises a lost motion spring assembly, an upper castellation piece, and a lower castellation piece. A spring hat comprises a crown, a pin hole through the crown, and a brim. A lost motion spring is seated against the spring hat. Upper castellation piece comprises a tubular body, an upper inner rim adjoining the brim, and upper castellation teeth. Lower castellation piece comprises a spring post extending up from a castellation body, the spring post passing through the lost motion spring, and through the pin hole. Lower castellation teeth extend from the castellation body. The lost motion spring is biased against the castellation body to lift the upper inner rim by the brim. A lash screw can house the spring post so that the spring post terminates inside the lash screw. A rocker arm is an example of a castellation assembly installation.
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公开(公告)号:US20240052762A1
公开(公告)日:2024-02-15
申请号:US18485877
申请日:2023-10-12
发明人: Lap Lam CHUI
CPC分类号: F01L1/24 , F01L1/181 , F01L1/2411 , F01L2001/2444
摘要: Embodiments provide combined valve actuating device with specialized actuating cams for hydraulic lash self-adjustment, including an actuator fixedly mounted on a rocker arm shaft and a rocker arm mounted with a hydraulic lash adjuster. The actuator is provided with a primary piston and an actuating piston. An actuating oil line is disposed between the primary piston hole and the actuating piston hole. The actuating oil line is connected to an oil supply line through a positioning and pressure control unit. A hydraulic linkage is formed between the primary piston and the secondary piston and an actuating valve is opened when oil is supplied to the actuating oil line.
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公开(公告)号:US20240011452A1
公开(公告)日:2024-01-11
申请号:US18369662
申请日:2023-09-18
发明人: Jacob Zuehl , Richard Sebzda , Vernon Moss
CPC分类号: F02F7/0085 , F01L1/146 , F01L1/181 , F01L3/02 , F01P1/00 , F02F1/004 , F02F3/0084 , F16J9/28 , F01L2301/00 , F16C7/023
摘要: An internal combustion engine includes an engine block, a piston, and a cylinder head. The engine block includes a cylinder block having a cylinder bore, a crankcase defining a crankcase chamber with a crankshaft positioned within the crankcase chamber, and a cylinder sleeve fabricated from a self-lubricating plastic material. The cylinder head is coupled to the cylinder block to form a combustion chamber. The piston includes a piston top adjacent the combustion chamber, a piston body including a wrist pin hole configured to receive a wrist pin, a first piston ring positioned on the piston body, and a non-metallic gasket positioned on the piston body closer to the combustion chamber than the first piston ring and structured to prevent combustion gases from escaping the combustion chamber. The crankcase chamber is oilless.
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10.
公开(公告)号:US20230296036A1
公开(公告)日:2023-09-21
申请号:US18318884
申请日:2023-05-17
CPC分类号: F01L1/181 , F01L13/065 , F01L2013/001
摘要: A rocker assembly for a type III center pivot valvetrain comprises a rocker arm having a cam end, a center pivot bore, and a valve end which includes a first actuator bore and a second actuator bore. The rocker assembly further comprises a a cylinder deactivation actuator arranged in the first actuator bore. The cylinder deactivation actuator comprises a hydraulically actuated latch assembly configured to selectively switch between a latched configuration and an unlatched configuration and a a mechanical lash-setting sleeve distanced from a travel stop defined within the first actuator bore. The cylinder deactivation actuator further comprises a lash step disposed below the mechanical lash-setting sleeve and extending into the first actuator bore. The hydraulically actuated latch assembly is configured to selectively travel between the travel stop and the lash step when the hydraulically actuated latch assembly is in the latched configuration.
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