公开(公告)号：US20210054767A1

公开(公告)日：2021-02-25

申请号：US16547713

申请日：2019-08-22

Applicant: CATERPILLAR INC.

Inventor： Ashwin A. HATTIANGADI ,  John Stephen PIPIS, JR. ,  Charles Francis COFFEY ,  Kevin Duane YODER ,  Vaibhav BALAJI

IPC: F01L3/08 ,  F01L1/047 ,  F01L1/08

Abstract: A cam follower assembly includes a cam roller, and a generally cylindrical body having an outer peripheral surface configured to be reciprocally slidable within a bore of an engine component. The cam roller is rotatably mounted on the body and configured to engage with a cam lobe on a camshaft of the engine. The cam lobe is operative to drive the body to a position at which the cam follower assembly causes one of opening of a valve or actuation of a fuel injector of the engine. A groove is formed in the body inset from the outer peripheral surface and extending axially along the outer peripheral surface parallel to the longitudinal axis of the body and aligned with an axial median plane of the cam roller and the cam lobe.

公开(公告)号：US20210040871A1

公开(公告)日：2021-02-11

申请号：US16977857

申请日：2018-12-04

Applicant: Eaton Intelligent Power Limited

Inventor： Mark Vanwingerden ,  Matthew Vance

IPC: F01L13/06 ,  F01L1/18 ,  F01L1/047 ,  F01L1/08 ,  F01L1/26 ,  F02D13/04

Abstract: A rocker arm assembly operable in a first mode and a second mode, the rocker arm assembly selectively opening first and second engine valves based on rotation of a cam shaft having a first cam lobe and a second cam lobe, includes: a rocker shaft; a first rocker arm assembly having a first rocker arm that receives the rocker shaft and rotates around the rocker shaft in the first mode based on engagement with the first cam lobe; a second rocker arm assembly having a second rocker arm that receives the rocker shaft and rotates around the rocker shaft and selectively act on one of the first and second engine valves in the second mode based on selective engagement with the second cam lobe; and a biasing assembly that cooperates with the second rocker arm to bias the second rocker arm to a neutral position.

公开(公告)号：US10801419B2

公开(公告)日：2020-10-13

申请号：US16061348

申请日：2016-01-29

Applicant: VOLVO TRUCK CORPORATION

Inventor： Anders Mohlin

IPC: F02D13/02 ,  F01L1/08 ,  F01L1/18 ,  F01L1/26 ,  F01L1/344 ,  F01L13/06 ,  F02B37/02 ,  F02B37/22 ,  F02D9/06 ,  F02D9/10 ,  F02D13/04

Abstract: An internal combustion engine is provided including a cylinder including a piston connected to a rotatable crankshaft, an exhaust guide being arranged to guide a gas flow from the cylinder, an adjustable flow restriction element arranged to restrict the flow through the exhaust guide, an exhaust valve arranged to control a communication between the cylinder and the exhaust guide, and an exhaust valve actuation assembly for actuating the exhaust valve so as to perform in each of a plurality of cycles of the cylinder an exhaust valve actuation sequence, wherein the exhaust valve actuation assembly is adapted to control the commencement of the exhaust valve actuation sequence to occur selectively at any crankshaft angle within a non-zero crankshaft angle interval.

公开(公告)号：US10774694B2

公开(公告)日：2020-09-15

申请号：US16534403

申请日：2019-08-07

Applicant: Eaton Intelligent Power Limited

Inventor： Mark VanWingerden ,  Douglas Nielsen ,  James E. McCarthy, Jr.

IPC: F01L1/24 ,  F02D13/06 ,  F01L1/14 ,  F01L13/00 ,  F01L1/20 ,  F02D41/00 ,  F02D13/02 ,  F01L1/08

Abstract: A valve train assembly includes an intake rocker arm, an exhaust rocker arm, a carrier configured to couple to a cylinder block and operably associated with the intake rocker arm and the exhaust rocker arm, the carrier including a first aperture, and a cylinder deactivation (CDA) capsule disposed within the first aperture. The CDA capsule is configured to move between a latched condition that transfers motion from a push rod to one of the intake rocker arm and the exhaust rocker arm, and an unlatched condition that absorbs motion from the push rod and does not transfer the motion to the intake rocker arm or the exhaust rocker arm.

公开(公告)号：US10655506B2

公开(公告)日：2020-05-19

申请号：US16072859

申请日：2017-01-19

Applicant: ISUZU MOTORS LIMITED

Inventor： Hiroshi Tsunoda

IPC: F01L1/04 ,  F01L1/053 ,  F01L13/00 ,  F01L1/08 ,  F01L1/047 ,  F01L1/18

Abstract: Multiple tubular members 40 that include multiple cam members 41 and 42 having cam parts 11 are connected to each other to form a single cam tube 12. Multiple female splines 45, which are partially arranged on an inner tube surface 44 of the tubular members which include the cam members 41 and 42, mate with male splines 47 formed on the outer tube surface 46 of a drive shaft 13, and the cam tube 12 rotates integrally with the drive shaft 13, and is capable of moving freely in the axial direction thereof.

公开(公告)号：US10550740B2

公开(公告)日：2020-02-04

申请号：US16086379

申请日：2017-03-23

Applicant: SHANGHAI UNIVERSOON AUTOPARTS CO., LTD.

Inventor： Zhou Yang ,  Rujie Zhu ,  Yong Xi

IPC: F01L13/06 ,  F01L1/08 ,  F01L1/18

Abstract: A multifunctional engine brake, comprising an engine valve motion transformation mechanism, a slow seating mechanism (250), and a timing oil control mechanism. By axially moving a roller (235) on a roller shaft (231), the connections between the roller (235) and different cams (230, 2302) are switched, so as to implement the transformation between different engine valve motions. A roller axial driving mechanism (100) is disposed in the roller shaft (231), thereby achieving a simple and compact structure, a symmetrical and reliable force, and easy manufacturing and assembling. The timing oil control mechanism provides timing oil supply or discharge for the engine brake, thereby eliminating the randomness of the opening or closing of a conventional engine brake, avoiding slipping and impact of the roller during roller translation, and improving the reliability and durability of the brake and engine. The slow seating mechanism (250) effectively reduces and controls the seating speed of the valve, thereby eliminating the compact within the mechanism. The brake can be used for different types of variable valve motions, comprising valve motions generating 4-stroke braking, 2-stroke braking, or 1.5-stroke braking.

公开(公告)号：US20200018194A1

公开(公告)日：2020-01-16

申请号：US16036352

申请日：2018-07-16

Applicant: Caterpillar Inc.

Inventor： Craig Hittle

IPC: F01L1/18 ,  F01L1/047 ,  F01L1/08

Abstract: An internal combustion engine includes a valvetrain having a pivot stand assembly that includes rocker arm assemblies and a compound pivot stand including a cap that integrates camshaft journaling and rocker arm support. The cap includes an elongate cap body structured to bolt to a base to form a camshaft journal bore, and each of a first and a second shaft bore for receiving rocker arm pivot shafts to position the rocker arms at different pivot locations. The rocker arms may be structured to actuate gas exchange valves arranged in a diamond pattern.

公开(公告)号：US10480357B2

公开(公告)日：2019-11-19

申请号：US16089900

申请日：2017-03-30

Applicant: HONDA MOTOR CO., LTD.

Inventor： Yoshihiro Takada ,  Dai Kataoka ,  Kazunori Kikuchi

IPC: F01L1/34 ,  F01L1/053 ,  F01L13/00 ,  F01L1/08 ,  F01L1/047

Abstract: A variable valve train is provided with cylindrical cam carriers axially slidably and co-rotatably supported on camshafts. The cam carriers have thereon, respectively, plural cam lobes different in cam profile and axially adjacent to each other. Cam changeover mechanisms are provided for axially shifting the cam carriers and for changing over the cam lobes for operating on engine valves. At least one of the cam changeover mechanisms is disposed between axes of the two camshafts and on the side of an engine crankshaft relative to the axes.

公开(公告)号：US10436079B2

公开(公告)日：2019-10-08

申请号：US15359200

申请日：2016-11-22

Applicant: MAN Truck & Bus AG

Inventor： Hai-Son Pham

IPC: F01L1/34 ,  F01L13/00 ,  F01L1/08 ,  F01L1/18 ,  F01L1/20 ,  F01L1/24

Abstract: A variable valve drive for a lifting valve, such as a charge-exchange valve of an internal combustion engine, that is periodically movable between closed and open positions indirectly by way of a cam via a rocker lever. The variable valve drive includes a switchable rocker lever arrangement for the actuation of the lifting valve, having a transmission rocker lever and a valve rocker lever which are mounted pivotably on different rocker lever axles parallel to the camshaft axis. The valve rocker lever, is in operative contact with the lifting valve at a first end, and has a roller, at a second end. The transmission rocker lever, is in engagement with a cam of the camshaft and, is operatively connected to the roller of the valve rocker lever.

公开(公告)号：US10352201B2

公开(公告)日：2019-07-16

申请号：US15761162

申请日：2016-01-13

Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA

Inventor： Yasuo Okamoto

IPC: F01L1/34 ,  F01L1/18 ,  F01L13/00 ,  F01L1/047 ,  F01L1/08 ,  F01L1/46

Abstract: A valve mechanism for an engine includes a camshaft, a rocker arm, a synchronization cam that rotates in synchronism with a valve driving cam, and a switch assembly that switches the driving state of an intake valve or an exhaust valve when a cam follower is pressed by the synchronization cam. The synchronization cam presses the cam follower at a time when the intake valve or the exhaust valve is closed. The switch assembly includes a switch unit that switches the driving state when a switch moves, a driver that drives the switch via a transmission, and a positioner including a spring-biased presser that engages with a concave portion of the transmission. The concave portion includes a first concave portion with which the presser engages in a first driving state, and a second concave portion with which the presser engages in a second driving state.