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公开(公告)号：US12098663B2
公开(公告)日：2024-09-24
申请号：US18116381
申请日：2023-03-02
申请人： BorgWarner Inc.
发明人： John R. Smerczak
CPC分类号： F01L1/3442 , F01L2001/34479
摘要： A hydraulically-actuated variable camshaft timing (VCT) assembly, including a stator having one or more fluid chambers; a rotor received by the stator, and configured to be angularly displaced relative to the stator, having one or more radially extending vanes positioned within the fluid chambers; one or more end plates coupled with the stator and at least partially defining the fluid chambers; and an end plate seal abutting the end plate(s) and the radial surface of the rotor.
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公开(公告)号：US11994045B2
公开(公告)日：2024-05-28
申请号：US17949692
申请日：2022-09-21
申请人： DENSO CORPORATION
CPC分类号： F01L1/3442 , F16K11/0716 , F01L2001/3443
摘要： A hydraulic oil control valve includes a sleeve, a spool and a spring. The spool is received at an inside of the sleeve and is configured to be reciprocated. The spring is configured to be seated against a spring seat of the sleeve and is configured to apply a preload to the spool. The sleeve has a stepped portion, which has a spool contact surface for limiting movement of the spool toward the spring seat, and a protrusion, which is located at a center of the spring seat and protrudes toward an opening of the sleeve. The protrusion has a sloped peripheral surface. The protrusion is configured such that in a state where an end portion of the spring is not seated against the spring seat while the spring is placed adjacent to the spring seat, the end portion of the spring contacts the protrusion.
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公开(公告)号：US20240077003A1
公开(公告)日：2024-03-07
申请号：US18460176
申请日：2023-09-01
发明人： Hisashi OZEKI
摘要： A variable valve device includes a pair of cam housings separated in a predetermined direction, a rocker shaft supported by the pair of cam housings, rocker arms supported by the rocker shaft, a connecting pin disposed in a pin hole of one of the rocker arms, a return pin disposed in a pin hole of another of the rocker arms, a pressing member that causes the connecting pin to push the return pin to the other side, a repulsive member that causes the return pin to push back the connecting pin to one side, and an upper housing supported at both ends by upper surfaces of the pair of cam housings. In the variable valve device, the upper housing is formed with a first accommodation hole in which the pressing member is disposed and a second accommodation hole in which the repulsive member is disposed.
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公开(公告)号：US11428126B2
公开(公告)日：2022-08-30
申请号：US17411502
申请日：2021-08-25
申请人： DENSO CORPORATION
发明人： Tetsuro Mitsutani
摘要： A drain port of a hydraulic oil controller is connected to an oil discharge portion. Each of partitions partitions between a corresponding one of drain oil passages and a corresponding one of a retard supply oil passage and an advance supply oil passage. Each of the drain oil passages connects between the oil discharge portion and a corresponding one of a retard chamber and an advance chamber. A recycle oil passage connects between: a portion of each drain oil passage located between the corresponding partition and the drain port; and the retard supply oil passage or the advance supply oil passage. A drain flow restrictor is formed in the portion of each drain oil passage located between the corresponding partition and the drain port. A passage cross-sectional area of the drain flow restrictor is smaller than a smallest passage cross-sectional area of the recycle oil passage and is constant.
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公开(公告)号：US11255227B2
公开(公告)日：2022-02-22
申请号：US17110418
申请日：2020-12-03
发明人： Kazuo Ueda , Yuji Noguchi , Hirokazu Nonogaki
摘要： A valve opening and closing timing control device includes: a drive-side rotary body rotating synchronously with a crankshaft; a driven-side rotary body provided inside the drive-side rotary body coaxially and rotating integrally with a camshaft; advance and retard chambers formed between the drive-side and driven-side rotary bodies; a lock mechanism switchable between a lock state and a lock release state; a valve unit including a fluid supply pipe into which fluid is supplied and a spool movable along a direction of the rotation axis, and controlling supply of the fluid to and from the lock mechanism, and the advance and retard chambers; and a tubular valve case having an internal space inside the driven-side rotary body and housing the valve unit in the internal space. A first opening portion is formed in the fluid supply pipe. A second opening portion is formed in the valve case.
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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：US11136927B2
公开(公告)日：2021-10-05
申请号：US16820763
申请日：2020-03-17
发明人： Shigeki Miyashita
摘要： An internal combustion engine system includes an internal combustion engine and a control device. A difference of an intake valve closing timing with respect to a compression top dead center is referred to as a first crank angle difference; a difference of an exhaust valve closing timing with respect to an exhaust top dead center is referred to as a second crank angle difference; and a difference between the first crank angle difference and the second crank angle difference is referred to as an intake/exhaust closing timing difference. The control device is configured to execute: a fuel cut processing; and a valve driving processing to control at least one of the intake valve closing timing and the exhaust valve closing timing such that the intake/exhaust closing timing difference becomes smaller during a fuel cut operation than during a non-fuel cut operation.
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公开(公告)号：US11105277B1
公开(公告)日：2021-08-31
申请号：US17158996
申请日：2021-01-26
发明人： Aed Dudar
摘要： Methods and systems are provided for controlling a variable displacement engine (VDE) of a vehicle to adjust a power generated by the VDE based on a demand for power from an onboard AC power generator of the vehicle. In one example, a method for a vehicle includes, with an engine of the vehicle turned off, estimating a power draw of an external electrical device to be supplied power via an onboard generator of the vehicle, and starting the engine in a variable displacement engine (VDE) mode with a number of deactivated cylinders selected based on the estimated power draw.
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公开(公告)号：US11078814B2
公开(公告)日：2021-08-03
申请号：US16770891
申请日：2018-11-27
申请人： Daimler AG
摘要： A valve drive device has a camshaft which includes a shaft element and a cam piece which can be driven by the shaft element and a first cam effecting a first stroke of a valve and a second cam effecting a second stroke of the valve, and is displaceable in the axial direction of the camshaft relative to the shaft element between a first position, in which the valve can be actuated by the first cam, and a second position in which the valve can be actuated by the second cam, and has an electrically controllable actuator via which the cam piece is displaceable relative to the shaft element in the axial direction as a result of an electrical control of the actuator. The actuator pushes the cam piece alternately back and forth between the positions in the case of successive electrical controls occurring with the same polarity.
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公开(公告)号：US11008968B2
公开(公告)日：2021-05-18
申请号：US15963863
申请日：2018-04-26
发明人： Joseph Ulrey , Russell Senior , Gregory McConville , Amey Karnik
摘要： Methods and systems are provided for diagnosing a cylinder valve deactivation mechanism in an engine system having cam-actuated valves. Movement of a latch pin of the deactivation mechanism is inferred from an induction current generated by a solenoid coupled to the latch pin, and the inferred movement is used to diagnose operation of cylinder valve deactivation mechanism. The inferred movement and a profile of the induction current is also used to estimate camshaft and crankshaft timing for improved cylinder fuel delivery in the absence of a camshaft sensor.
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