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公开(公告)号：US20210131317A1
公开(公告)日：2021-05-06
申请号：US17129356
申请日：2020-12-21
发明人： Andrei Dan Radulescu , Austin Robert Zurface , James R. Sheren , Anthony L. Spoor , Luigi Lia , Philip Michael Kline
摘要： A rocker arm includes an outer arm having a first side and a second side, an inner arm positioned between the first side and the second side of the outer arm, a pivot axle pivotally coupling the inner arm and the outer arm at a first end of each of the inner arm and the outer arm, and a latch having a first position and a second position. The latch in the first position pivotally fixes the inner arm and the outer arm at a second end of each of the inner arm and the outer arm, and in the second position allows the inner arm and the outer arm to pivot independently. The latch is responsive to hydraulic pressure in a hydraulic fluid passage to selectively move to other of the first position and the second position. A lost motion spring is coupled to the inner arm.
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公开(公告)号：US20200063609A1
公开(公告)日：2020-02-27
申请号：US16563572
申请日：2019-09-06
摘要： A method of precision manufacture of an outer arm of a rocker arm assembly is performed by determining structures of a rough outer arm that would require precision processing and locations to support the structures as they are processed. Starting with at least one structure requiring precision processing, locations on the outer arm close to the structure to hold the outer arm during processing are determined that would cause minimal distortion of the outer arm during processing. The outer arm is then provided with clamping lobes at these locations. The clamping lobes of the outer arm are clamping into a fixture for manufacturing. The slider pad may now be precision ground while the outer arm is clamped in the fixture with minimal risk of distortion of the outer arm.
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公开(公告)号：US11181013B2
公开(公告)日：2021-11-23
申请号：US16121322
申请日：2018-09-04
IPC分类号： F01L1/18 , F01L1/24 , F01L13/00 , F02F7/00 , F01L1/053 , F02F1/24 , F01L3/08 , F01L9/10 , F01L9/20 , F01L1/46 , F01L1/047
摘要： A novel cylinder head arrangement for an in-line four cylinder or eight cylinder engine. A modified arrangement allows additional space for installation of wider rocker arm assemblies used for variable valve lift (VVL), cylinder deactivation (CDA) and other types of variable valve actuation (VVA). In one embodiment, cam towers adjacent the end two cylinders are not used. At least one end support is used, which may be an outboard bearing on a camshaft for each end. The wider rocker assemblies may then be installed. In another embodiment, cam towers adjacent the inner two cylinders are eliminated and a single camshaft support piece with a support bearing is installed between the inner cylinders to provide support for the camshafts. The wider rocker assemblies may then be installed on at least one of the middle cylinders. A novel oil control valve operates latches in switching rocker arm assemblies.
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公开(公告)号：US20210156284A9
公开(公告)日：2021-05-27
申请号：US16121322
申请日：2018-09-04
摘要： A novel cylinder head arrangement for an in-line four cylinder or eight cylinder engine. A modified arrangement allows additional space for installation of wider rocker arm assemblies used for variable valve lift (VVL), cylinder deactivation (CDA) and other types of variable valve actuation (VVA). In one embodiment, cam towers adjacent the end two cylinders are not used. At least one end support is used, which may be an outboard bearing on a camshaft for each end. The wider rocker assemblies may then be installed. In another embodiment, cam towers adjacent the inner two cylinders are eliminated and a single camshaft support piece with a support bearing is installed between the inner cylinders to provide support for the camshafts. The wider rocker assemblies may then be installed on at least one of the middle cylinders. A novel oil control valve operates latches in switching rocker arm assemblies.
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公开(公告)号：US20210131316A1
公开(公告)日：2021-05-06
申请号：US17129318
申请日：2020-12-21
发明人： Andrei Dan Radulescu , Austin Robert Zurface , James R. Sheren , Anthony L. Spoor , Luigi Lia , Philip Michael Kline
摘要： A rocker arm includes an outer arm having a first side and a second side, an inner arm positioned between the first side and the second side of the outer arm, a pivot axle pivotally coupling the inner arm and the outer arm at a first end of each of the inner arm and the outer arm, and a latch having a first position and a second position. The latch in the first position pivotally fixes the inner arm and the outer arm at a second end of each of the inner arm and the outer arm, and in the second position allows the inner arm and the outer arm to pivot independently. The latch is responsive to hydraulic pressure in a hydraulic fluid passage to selectively move to other of the first position and the second position. A lost motion spring is coupled to the inner arm.
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公开(公告)号：US10731517B2
公开(公告)日：2020-08-04
申请号：US15877145
申请日：2018-01-22
发明人： Petr Liskar , Dale Arden Stretch , James Edward McCarthy , Nicholas Peter Gillette , Andrei Dan Radulescu
IPC分类号： F01L1/18 , F01L1/20 , F01L1/053 , H01F7/02 , H01F7/08 , F01L13/00 , F01L1/24 , H01F7/06 , H01F7/16 , F01L1/46
摘要： A valvetrain includes a rocker arm assembly having a rocker arm and an electromagnetic latch assembly. A magnet of the latch assembly is housed within a chamber formed by the rocker arm. The chamber may be a retrofit hydraulic chamber. The magnet may be an electromagnet or a permanent magnet. A flux shifting bi-stable latch provides a sufficiently compact design. Isolation of the magnet within the rocker arm chamber may provide protection from metal particles carried by oil in an operating environment for the rocker arm assembly.
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