公开(公告)号：US12241434B2

公开(公告)日：2025-03-04

申请号：US18228869

申请日：2023-08-01

Applicant: Caterpillar Inc.

Inventor： Curtis J Caldwell ,  Seth Ost ,  Brian Kacynski

IPC: B60L50/75 ,  E02F9/08 ,  F02M21/02

Abstract: A hydrogen fuel system for a work machine is disclosed. The hydrogen fuel system comprises a hydrogen storage tank containing hydrogen, the hydrogen being at least one of a liquid hydrogen or a gaseous hydrogen; a hydrogen power unit configured to consume the hydrogen from the hydrogen storage tank, the hydrogen power unit including at least one of a plurality of fuel cells or a hydrogen combustion engine; a boil-off pressure relief valve in fluid communication with the hydrogen storage tank; and a tank pressure sensor in communication with the boil-off pressure relief valve. The boil-off pressure relief valve is configured to, when the tank pressure sensor detects a pressure inside the hydrogen storage tank that exceeds a boil-off pressure threshold, vent the gaseous hydrogen to a boil-off fuel line fluidly connected to the hydrogen power unit.

公开(公告)号：US20250070364A1

公开(公告)日：2025-02-27

申请号：US18238357

申请日：2023-08-25

Applicant: Caterpillar Inc.

Inventor： Brian R. BELL

IPC: H01M50/264 ,  H01M50/249 ,  H01M50/258

Abstract: A battery lock out system for a work machine, having a manual service disconnect configured to be attached to a power module of a battery pack for providing electrical power to the work machine, a service plug configured to be attached to the power module once the manual service disconnect has been removed from the power module, and a locking bracket sliding between a first position and a second position, the locking bracket including a first tab configured to lock a cover of the battery pack while the locking bracket is in the first position, and a second tab configured to lock the service plug onto the power module while the locking bracket is in the second position and the manual service disconnect has been replaced with the service plug.

公开(公告)号：US12234845B1

公开(公告)日：2025-02-25

申请号：US18516414

申请日：2023-11-21

Applicant: Caterpillar Inc.

Inventor： Royce E. Leaders ,  Alex M. Fullenkamp

IPC: F15B21/08 ,  E02F9/22 ,  F15B11/16 ,  E02F9/20

Abstract: An electric powertrain for a machine includes an electric power source. The powertrain further includes an implement pump for powering a work implement and an implement pump electric motor. An electric traction motor is operably coupled to a traction device. An electronic controller stores a plurality of rimpull torque curves. The electronic controller is configured to determine if the electric power source is in a power limited condition and upon determining that the electric power source is in a power limited condition act to derate a rimpull torque of the traction device from a first rimpull torque curve of the plurality of rimpull torque curves to a lower second rimpull torque curve of the plurality of rimpull torque curves, wherein the selection of the second rimpull torque curve is based on a power usage by the implement pump electric motor.

公开(公告)号：US12234782B1

公开(公告)日：2025-02-25

申请号：US18373388

申请日：2023-09-27

Applicant: Caterpillar Inc.

Inventor： Hoisan Kim ,  Dana Ray Coldren ,  Lifeng Wang

IPC: F02D19/06 ,  F02M43/04

Abstract: A dual fuel engine system includes an engine, and a fuel system including a pressurized fuel reservoir, a first fuel pump, and a plurality of second fuel pumps each having an actuating fluid inlet fluidly connected to at least one of the first fuel pump or the pressurized fuel reservoir. The plurality of second fuel pumps may intensify or de-intensify a pressure of a second fuel relative to a pressure of the first fuel used to actuate the second fuel pumps so as to obtain an increased flow rate of the second fuel. Related apparatus and methodology is also disclosed.

公开(公告)号：US20250062371A1

公开(公告)日：2025-02-20

申请号：US18451540

申请日：2023-08-17

Applicant: Caterpillar Inc.

Inventor： Cédric GIRIN ,  Alex R. MOHNING ,  Mark A. HOLUB ,  Justin J. GRAUPMAN ,  Eric T. HEILLE

IPC: H01M8/04029 ,  B60L58/33 ,  E02F9/08 ,  H01M8/04014 ,  H01M8/0432 ,  H01M8/04701

Abstract: A work machine cooling system for cooling primary power source cooling fluid for a primary power source may include a primary power source cooling unit and a second power source cooling unit fluidly connected so that primary power source cooling fluid flows from the primary power source through the primary and secondary power source cooling units is discharged back to the primary power source. The work machine cooling system may further include a primary cooling fan disposed proximate the primary fuel cell cooling unit to discharge airflow onto the primary fuel cell cooling unit, and a secondary cooling fan disposed proximate the secondary fuel cell cooling unit to discharge airflow onto the secondary fuel cell cooling unit. The secondary cooling fan may be turned off until the primary cooling fluid temperature is greater than a transient event threshold temperature indicating the occurrence of a transient thermal event.

公开(公告)号：US20250059904A1

公开(公告)日：2025-02-20

申请号：US18234488

申请日：2023-08-16

Applicant: Caterpillar Inc.

Inventor： Suresh Babu Chennagowni ,  Mandar A. Joshi ,  Siyi Zhou

IPC: F01P3/02

Abstract: Apparatuses, systems and methods are disclosed including an internal combustion engine. The internal combustion engine can include an engine block and a cylinder head. The engine block can define an inlet passage and a plurality of cylinder jackets in fluid communication in series. The engine block can include one or more passages from each of the plurality of cylinder jackets. The cylinder head can be mounted to the engine block and can include an outlet passage and a plurality of lower cylinder head jackets. The one or more passages can be in fluid communication with respective ones the plurality of lower cylinder head jackets. A diameter of the one or more passages in fluid communication with one of the plurality of cylinder jackets differs from diameters of the one or more passages in fluid communication with others of the plurality of cylinder jackets.

公开(公告)号：US20250058255A1

公开(公告)日：2025-02-20

申请号：US18234970

申请日：2023-08-17

Applicant: Caterpillar Inc.

Inventor： Stephen E. Oedewaldt ,  Jon T. Immel

IPC: B01D29/96 ,  B01D29/11 ,  B01D35/00 ,  F01M11/03

Abstract: A filter assembly for a fluid system such as an oil system for an engine includes a first filter component having a first threaded peripheral surface and a plurality of posts projecting from a radially extending surface. The filter assembly further includes a second filter component including a second threaded peripheral surface and a plurality of detent clips matched to the plurality of posts in number and in angular spacing around the center axis. At least one of, the plurality of posts or the plurality of detent clips, is deformable in a radial direction via relative rotation of the detent clips together about the center axis to click-lock engage the detent clips with the posts.

公开(公告)号：USD1062793S1

公开(公告)日：2025-02-18

申请号：US29753550

申请日：2020-09-30

Applicant: Caterpillar Inc.

Designer： Jonathan R. Chittenden ,  Andrew D. Rockwell

公开(公告)号：US12227916B2

公开(公告)日：2025-02-18

申请号：US17533731

申请日：2021-11-23

Applicant: Caterpillar Inc.

Inventor： Mark W. Thompson ,  Trent R. Stefek

IPC: E02F3/36 ,  F16B2/06

Abstract: A quick coupler and methods of coupling and decoupling a quick coupler and work tool are disclosed. The quick coupler includes a frame, cylinder, primary blocking member, secondary blocking member, biasing member, and controller. The method of coupling includes activating an AUTOMATIC LOCKING state, automatically locking a second tool pin within a hook, a first tool pin entering a notch, and activating a LOCKED state. The method of decoupling includes activating the AUTOMATIC LOCKING state, resting the work tool on a surface, activating an UNLOCKED state, and separating the quick coupler and work tool. Advantageously, the quick coupler can automatically lock the second tool pin without actuation of the cylinder.

公开(公告)号：US12227397B2

公开(公告)日：2025-02-18

申请号：US18061466

申请日：2022-12-04

Applicant: Caterpillar Inc.

Inventor： Simon Tabutin ,  Sean D. Lawson

IPC: B66C23/00 ,  B66C23/76

Abstract: In some implementations, a counterweight assembly, for a lifting machine, includes a plurality of counterweight slabs, including first and second outer counterweight slabs and one or more inner counterweight slabs sandwiched between inner lateral surfaces of the first and second outer counterweight slabs, wherein an outer lateral surface of each outer counterweight slab includes one or more recesses having one or more respective reflective decals disposed therein.