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公开(公告)号：US20240044267A1
公开(公告)日：2024-02-08
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：US11280227B2
公开(公告)日：2022-03-22
申请号：US16995370
申请日：2020-08-17
发明人： Michael Mazur , Jens Jeschke , Johannes Forst , Holger Blume , Nico Gerhardt
摘要： A method for adaptation of a detected camshaft position of a camshaft in an internal combustion engine with: Detection of an ACTUAL gas signal in a gas space that is associated with the camshaft and is associated with a detected camshaft position; Processing of the gas signal to produce an ACTUAL gas criterion; Modeling of multiple simulated gas criteria, each of which is associated with a target camshaft position; Determination of a simulated gas criterion with the least deviation from the ACTUAL gas criterion; Determination of an ACTUAL camshaft position that corresponds to the simulated gas criterion with the least deviation from the ACTUAL gas criterion; Determination of a camshaft position correction value from the difference between the ACTUAL camshaft position determined and the detected camshaft position; Determination of corrected camshaft positions by correcting the detected camshaft positions with the camshaft position correction value.
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公开(公告)号：US11131222B2
公开(公告)日：2021-09-28
申请号：US17249090
申请日：2021-02-19
摘要： A valve actuation system comprises a first motion transfer mechanism operatively connected to a first valve actuation motion source and to the at least one engine valve, a second motion transfer mechanism operatively connected to a second valve actuation motion source; and a selectable coupling mechanism between the first and second motion transfer mechanisms. The coupling mechanism is operable in a first state where first valve actuation motions are conveyed to the at least one engine valve via the first motion transfer mechanism, and a second state where second valve actuation motions are additionally conveyed to the at least one engine valve via the second motion transfer mechanism, the coupling mechanism and the first motion transfer mechanism. During a handoff between the first and second valve actuation motions or vice versa, a difference in valve actuation velocities of the first and second valve actuation motions does not exceed a threshold.
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公开(公告)号：US11041456B2
公开(公告)日：2021-06-22
申请号：US15934742
申请日：2018-03-23
申请人： Quest Engines, LLC , Steve Blom
IPC分类号： F02F1/18 , F02M63/00 , F16C3/10 , F02F3/28 , F02B75/22 , F02F1/20 , F02F1/24 , F01L1/04 , F01L13/00 , F01L1/08 , F01L1/18 , F01L1/38 , F01L1/28 , F02B33/04 , F01L3/20 , F02B75/32 , F01B9/02 , F02B33/26 , F02F3/02 , F01L1/24
摘要： Internal combustion engines having a split crankshaft are disclosed. The engines may also have non-circular, preferably rectangular, cross-section pistons and cylinders. The pistons may include a skirt with a field of pockets that provide a ringless, non-lubricated, seal equivalent. The pistons also may have a domed piston head with depressions thereon to facilitate the movement of air/charge in the cylinder. The engines also may use multi-stage poppet valves in lieu of conventional poppet valves. The engines may use the pumping motion of the engine piston to supercharge the cylinder with air/charge. 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.
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公开(公告)号：US20210054780A1
公开(公告)日：2021-02-25
申请号：US16608712
申请日：2018-04-27
申请人： Fukuei SAWADA , Shigeru SATO
发明人： Fukuei SAWADA , Shigeru SATO
摘要： In an exemplary embodiment, an internal combustion engine, in which a valve is opened and closed when a piston reciprocates in a cylinder, has a configuration to perform repeatedly the following combined strokes: an intake stroke→a compression stroke→a combustion stroke→an exhaust stroke in a four-cycle internal combustion engine are combined with an intake and compression stroke→a combustion and exhaust stroke in a two-cycle internal combustion engine. The internal combustion engine can reduce pumping loss in a six-cycle internal combustion engine and increase the output.
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公开(公告)号：US10858969B2
公开(公告)日：2020-12-08
申请号：US16089845
申请日：2017-03-30
发明人： Yoshihiro Takada , Dai Kataoka
摘要： An engine variable valve train is provided with a cylindrical cam carrier fitted on a camshaft in a manner axially slidable to and co-rotatable with the camshaft. The cam carrier has therearound mutually adjoining low-speed and high-speed cam lobes selectively acting on the engine valve and being different in cam profile. The cam carrier has therearound lead grooves to be engaged with or disengaged from changeover pins for axial shift of the cam carrier. The lead grooves include a speed-increasing lead groove for changeover from the low-speed to the high-speed cam lobe and a speed-decreasing lead grooves for changeover from the high-speed to the low-speed cam lobe. The speed-increasing and speed-decreasing lead grooves are different in groove contour. This enables the cam carrier to axially shift smoothly and to improve the durability of the lead grooves.
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公开(公告)号：US20200347754A1
公开(公告)日：2020-11-05
申请号：US16401765
申请日：2019-05-02
申请人： Caterpillar Inc.
摘要： A gas engine is disclosed. The gas engine may include a combustion cylinder. The combustion cylinder may include an intake with an intake valve. The combustion cylinder may include an exhaust with an exhaust valve. The gas engine may include a gas admission valve assembly coupled to the intake. The gas admission assembly may include a trimmable electro-hydraulically actuatable gas admission valve to control a gas flow into the intake.
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公开(公告)号：US10711664B2
公开(公告)日：2020-07-14
申请号：US15320382
申请日：2015-07-01
发明人： Ulf Müller
摘要： A valve drive may include a sliding cam element that is held on a carrier shaft so as to be axially displaceable along an axis of rotation of the carrier shaft. The sliding cam element may include at least one cam profile group with cam profile sections of mutually different form. The valve drive may further include a pick-off element by way of which a control movement can be picked off from the cam profile sections and transmitted to a valve. The sliding cam element may also include a second cam profile group that is similar or identical to the first cam profile group and, which for the joint control of one valve, may interact with the pick-off element.
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公开(公告)号：US10602571B2
公开(公告)日：2020-03-24
申请号：US15461653
申请日：2017-03-17
发明人： Hiroki Tateishi
摘要： Provided is a heat treatment method for a cam piece, and the cam piece has an insertion hole into which a cam shaft is inserted, a base portion configuring a base circle of a cam, and a nose portion configuring a cam ridge. The heat treatment method for the cam piece includes: a first step of using a jig formed into a shape having a cavity, the jig being inserted into the insertion hole such that the cavity is located between an inner circumferential surface of the nose portion of the cam piece and a central axis of the jig; and a second step of heating the cam piece from an outer circumferential surface side by high-frequency induction heating in a state in which the jig is inserted in the insertion hole of the cam piece.
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公开(公告)号：US10443454B2
公开(公告)日：2019-10-15
申请号：US15539053
申请日：2015-12-02
申请人： Daimler AG
摘要： 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.
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