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：US11035332B2

公开(公告)日：2021-06-15

申请号：US15847301

申请日：2017-12-19

Applicant: CATERPILLAR INC.

Inventor： Sana Mahmood ,  Robert M. Campion ,  Lifeng Wang

IPC: F02M63/00 ,  F02M47/02 ,  F02M61/04 ,  F02M51/06 ,  F16K31/124 ,  F02M59/00 ,  F16K31/06 ,  F02M55/02

Abstract: A fuel injector is disclosed. The fuel injector may have an injector body having a fuel inlet and at least one orifice. The fuel injector may also have a first check valve member. The first check valve member may be selectively movable to fluidly block a first flow of fuel from the fuel inlet to the at least one orifice. The fuel injector may have a second check valve member. The second check valve member may be selectively movable to fluidly block a second flow of fuel from the fuel inlet to the at least one orifice. The fuel injector may also have a control valve assembly. The control valve assembly may be configured to selectively operate either the first check valve or both the first check valve and the second check valve to fluidly connect the fuel inlet and the at least one orifice.

公开(公告)号：US20190353125A1

公开(公告)日：2019-11-21

申请号：US15985170

申请日：2018-05-21

Applicant: Caterpillar Inc.

Inventor： Wade James Robel ,  Thomas Jeffrey Crowell ,  Lifeng Wang

IPC: F02M55/04 ,  F02M59/36 ,  F02M45/04

Abstract: A fuel system for an internal combustion engine includes a fuel system, a valve train, and a fuel injector including a cam actuated plunger. The fuel injector has a noise suppressor fluidly connecting a plunger cavity to each of a spill passage and a nozzle supply passage in the fuel injector. The noise suppressor has an inlet configuration forming a fuel admission flow area to the plunger cavity, and an outlet configuration forming a fuel discharge flow area. The fuel discharge flow area is smaller than the fuel admission flow area, and the noise suppressor adjusts to the outlet configuration to throttle discharging of fuel from the plunger cavity to limit valve train noise.