公开(公告)号：US20240337233A1

公开(公告)日：2024-10-10

申请号：US18747235

申请日：2024-06-18

Applicant: Eaton Intelligent Power Limited

Inventor： Swapnil JARANDE ,  Manasi Sachin SHETE ,  Michael HALSMER ,  Matthew A. VANCE

IPC: F02M59/10 ,  F02M59/48 ,  F04B53/00

CPC classification number: F02M59/102 ,  F02M59/48 ,  F04B53/00

Abstract: A pump actuator for use between a cam and a pump comprises a pump actuator body having a pad defined between a plunger facing surface and an opposite roller facing surface, where the plunger facing surface is recessed into the pump actuator body and offset from a radial end. The pump actuator body further comprises a cylindrical wall defined between the radial end and the plunger facing surface. A concave surface feature is formed on the pad on its plunger facing surface. The opposite roller facing surface of the pad is provided with a surface enhancing treatment comprising shot peening. These features, separately or in combination, provide mass-neutral improvements of the pump actuator body's fatigue life.

公开(公告)号：US20240133356A1

公开(公告)日：2024-04-25

申请号：US18278330

申请日：2022-03-11

Applicant: Caterpillar Motoren GmbH & Co. KG

Inventor： Robert GRAUMÜLLER

IPC: F02M63/00 ,  F02M59/10 ,  F02M59/36

CPC classification number: F02M63/0001 ,  F02M59/102 ,  F02M59/36

Abstract: A lubricated high pressure fuel pump assembly is provided, comprising a fuel pump, a sealed enclosure and a pump lubrication circuit. The fuel pump includes a pump drive shaft via which the fuel pump is configured to be mechanically driven. The sealed enclosure is configured to surround a first portion of the pump drive shaft, wherein the first portion is exterior to the fuel pump. The pump lubrication circuit comprises a lubricant reservoir and a lubricant pump configured to pump lubricant from the lubricant reservoir to the pump drive shaft. The sealed enclosure is configured to prevent fluid leakage from the fuel pump via the first portion of the pump drive shaft and the lubricant reservoir is configured to collect the lubricant from the pump drive shaft, such that the lubricant is retained within the lubricated high pressure fuel pump assembly.

公开(公告)号：US11898525B2

公开(公告)日：2024-02-13

申请号：US17625353

申请日：2020-06-09

Applicant: Schaeffler Technologies AG & Co. KG

Inventor： Norbert Geyer ,  Marco Junker

IPC: F02M59/10 ,  F01L1/14 ,  F04B1/0408 ,  F04B1/0426 ,  F04B9/04

CPC classification number: F02M59/102 ,  F01L1/14 ,  F04B1/0408 ,  F04B1/0426 ,  F04B9/042 ,  F01L2305/00

Abstract: The disclosure relates to a roller tappet for a high-pressure fuel pump. The roller tappet includes a housing that accommodates a cam contact roller next to a drive-side annular face of the housing. A bridge piece sits on an inner lateral surface of the housing, after the cam contact roller, as viewed from the drive-side annular face. An outer end face of the bridge piece has a rest for a pump piston. A separate adapter bolt protrudes from the rest beyond the output-side annular face of the housing; an end face of the adapter bolt, remote from the bridge piece, serves as a direct rest for the pump piston. An annular disc sits next to the output-side annular face of the housing, and the bore of said annular disc surrounds and retains the adapter bolt.

公开(公告)号：US20240018925A1

公开(公告)日：2024-01-18

申请号：US18253724

申请日：2021-12-10

Applicant: Eaton Intelligent Power Limited

Inventor： Kapil Mohadikar

IPC: F02M59/10 ,  F01L1/14

CPC classification number: F02M59/102 ,  F01L1/14 ,  F02M2200/8023 ,  F02M2200/803 ,  F02M2200/8053

Abstract: A pump actuator for use between a cam and a pump includes an outer body, an inner body, an axle and a bearing. The outer body has an outer body inner surface. The inner body is received by the outer body. The inner body has an inner body outer surface. The axle is supported by the inner body. The bearing is supported on the axle. The inner body includes at least one stamped feature protruding outwardly from the inner body outer surface. The at least one stamped feature is configured to form an interference fit with the outer body inner surface.

公开(公告)号：US20230323845A1

公开(公告)日：2023-10-12

申请号：US18036007

申请日：2021-11-10

Applicant: DELPHI TECHNOLOGIES IP LIMITED

Inventor： David JONES

IPC: F02M55/04 ,  F02M59/10 ,  F02M59/30 ,  F02M59/44

CPC classification number: F02M55/04 ,  F02M59/102 ,  F02M59/30 ,  F02M2700/1388 ,  F02M2200/31 ,  F02M2700/1376 ,  F02M59/44

Abstract: A fuel pump assembly comprises a plunger arranged to reciprocate within a plunger bore via a drive shaft, to perform a pumping cycle comprising a pumping stroke and a return stroke, the pumping stroke comprising movement of the plunger from a bottom dead centre (BDC) position to a top dead centre (TDC) position, and the return stroke comprising movement of the plunger from the TDC position to the BDC position. The fuel pump assembly comprises a spring assembly including a return spring that is cooperable, at a first end, with a first member coupled to the plunger and movable at a first speed dependent on the speed of rotation of the drive shaft and, at a second end, with a second member which is movable at a damped speed relative to the first speed.

公开(公告)号：US20230287873A1

公开(公告)日：2023-09-14

申请号：US18318830

申请日：2023-05-17

Applicant: Cummins Inc.

Inventor： Donald J. Benson ,  Eric A. Benham ,  Ahmad M. Sabri ,  Samuel David Griffith Magnuson

IPC: F04B9/04 ,  F04B1/0417 ,  F02M59/10

CPC classification number: F04B9/042 ,  F02M59/102 ,  F04B1/0417

Abstract: A pumping assembly includes at least one removable unit barrel pumping assembly coupled to a housing of the pumping assembly. The pumping assembly further includes a drive member having a roller configured to engage a portion of the unit barrel pumping assembly during operation of the pumping assembly. The roller is configured to include a plurality of geometric shapes to distribute load forces during operation of the pumping assembly.

公开(公告)号：US20230213011A1

公开(公告)日：2023-07-06

申请号：US18181007

申请日：2023-03-09

Applicant: Cummins Inc.

Inventor： Roberto M. Munoz ,  Amanda Baker ,  Yip Kwok ,  Thomas M. Yeager

IPC: F02M59/10 ,  F02M59/08

CPC classification number: F02M59/102 ,  F02M59/08

Abstract: The disclosure relates to fuel pump housings and fuel pump systems incorporating the same. The fuel pump housing includes at least one tappet housing portion configured to receive at least one tappet assembly and a main bore portion fluidly coupled with the at least one tappet housing portion such that the main bore receives a camshaft. The main bore includes an uncut portion and at least one relief cut portion proximal to the at least one tappet housing portion. The uncut portion defines a first centerline, and the relief cut portion defines a second centerline offset from the first centerline.

公开(公告)号：US20230066007A1

公开(公告)日：2023-03-02

申请号：US17800319

申请日：2021-01-19

Applicant: Schaeffler Technologies AG & Co. KG

Inventor： Norbert Geyer

IPC: F02M59/10 ,  F04B9/02

Abstract: The disclosure relates to a tappet for acting on a pump piston of a high-pressure fuel pump of an internal combustion engine. The tappet includes a tubular housing, and at the upper annular end face of the tubular housing, two surfaces which are indented relative to the outer casing of the housing and comprise a pin that supports a cam roller, lie diametrically opposite each other. An upper end face of a transverse beam lies against axial inner end faces of the two surfaces. A transverse beam lower end face, which faces a lower annular end face of the housing, is provided with a pin, which protrudes from the housing and is surrounded by a spring plate supported against the inner casing of the housing. A sleeve-like inner collar of the spring plate guides the unstepped pin.

公开(公告)号：US11572857B2

公开(公告)日：2023-02-07

申请号：US17116577

申请日：2020-12-09

Applicant: HYUNDAI KEFICO CORPORATION

Inventor： Kyung Chul Han ,  Hyeong Kyun Park ,  Jin Sung Kim ,  Chun Ky Hong

IPC: F02M59/46 ,  F02M59/10 ,  F04B7/00 ,  F04B53/10

Abstract: A suction valve of a high-pressure fuel pump for a vehicle includes a housing having an inlet through which a fuel is introduced and a pump chamber configured to press the fuel, a valve installation space arranged between the inlet and the pump chamber, and a solenoid part provided with a rod for performing a linear reciprocal motion, and further includes a valve sleeve inserted into the valve installation space and formed with a flow hole, a valve spring seated on the valve sleeve, a valve plate elastically supported by the valve spring, and moving in conjunction with the rod, and a valve sheet formed with an introduction hole opened and closed by the valve plate, in which the valve sleeve is slid and inserted into the valve installation space, and the valve sheet is fitted into and fastened to the valve installation space to support the valve sleeve.

公开(公告)号：US11352995B2

公开(公告)日：2022-06-07

申请号：US17097411

申请日：2020-11-13

Applicant: MAN Energy Solutions SE

Inventor： Wolfgang Wagner ,  Denis Kovalev ,  Markus Meixner ,  Thomas Hamann

IPC: F02M59/44 ,  F04B1/0421 ,  F04B53/04 ,  F04B53/16 ,  F02M59/10 ,  F04B53/00

Abstract: A piston pump as a high-pressure fuel pump of a common rail system includes: a pump cylinder; a pump piston moveably mounted in a recess of the pump cylinder, the pump piston being moveable up and down in the recess; and a leakage groove arranged in the pump cylinder in a region of the recess, the leakage groove being coupled with a leakage line configured to discharge a fuel leakage. Between the pump cylinder and the pump piston a different size pairing clearance is formed in first and second portions of the pump cylinder.