公开(公告)号：US11078827B2

公开(公告)日：2021-08-03

申请号：US16157793

申请日：2018-10-11

Applicant: Caterpillar Inc.

Inventor： David Yu Zhang Chang

IPC: F02B19/18 ,  F02B19/06 ,  F02B19/14 ,  F02B19/10

Abstract: An ignition system for a gaseous fuel engine includes an igniter and an actuator structured to apply an actuating force to a piston within the igniter, to autoignite an ignition charge of fuel and air within the igniter. A housing of the igniter includes a gas orifice having a flow area that is increased between a combustion pre-chamber in the igniter and a main combustion chamber in the engine, to limit velocity of outgoing combustion gases to below a threshold velocity for engine mis-fire.

公开(公告)号：US11566545B2

公开(公告)日：2023-01-31

申请号：US16401765

申请日：2019-05-02

Applicant: Caterpillar Inc.

Inventor： David Yu Zhang Chang ,  David Todd Montgomery ,  Scott Fiveland ,  Scott F. Shafer

IPC: F01L1/24 ,  F01L1/04 ,  F02D41/14

Abstract: A gas engine is disclosed. The gas engine may include a combustion cylinder. The combustion cylinder may include an intake with an intake valve. The combustion cylinder may include an exhaust with an exhaust valve. The gas engine may include a gas admission valve assembly coupled to the intake. The gas admission assembly may include a trimmable electro-hydraulically actuatable gas admission valve to control a gas flow into the intake.

公开(公告)号：US11236705B2

公开(公告)日：2022-02-01

申请号：US16912300

申请日：2020-06-25

Applicant: Caterpillar Inc.

Inventor： David Yu Zhang Chang

IPC: F02M21/04 ,  F02M21/02 ,  B01F3/02 ,  B01F5/00 ,  F02M35/10 ,  B01F5/04

Abstract: A gaseous fuel mixer assembly for an engine includes a mixer housing forming gas delivery openings, and positioned to extend across a flow path formed by an intake conduit for the engine. A spool valve is within a central bore in the mixer housing and includes gas distribution openings selectively connectable to the gas delivery openings by moving the spool valve within the mixer housing using a piezoelectric actuator coupled with the spool valve by way of a pivot arm. Sealing lands of the spool valve are in an alternating arrangement with the gas distribution openings, such that at the closed position the sealing lands block the gas distribution openings from the gas delivery openings, and at the open position the respective openings are fluidly connected.

公开(公告)号：US20210404422A1

公开(公告)日：2021-12-30

申请号：US16912300

申请日：2020-06-25

Applicant: Caterpillar Inc.

Inventor： David Yu Zhang Chang

IPC: F02M21/04 ,  F02M35/10 ,  F02M21/02 ,  B01F3/02 ,  B01F5/04 ,  B01F5/00

Abstract: A gaseous fuel mixer assembly for an engine includes a mixer housing forming gas delivery openings, and positioned to extend across a flow path formed by an intake conduit for the engine. A spool valve is within a central bore in the mixer housing and includes gas distribution openings selectively connectable to the gas delivery openings by moving the spool valve within the mixer housing using a piezoelectric actuator coupled with the spool valve by way of a pivot arm. Sealing lands of the spool valve are in an alternating arrangement with the gas distribution openings, such that at the closed position the sealing lands block the gas distribution openings from the gas delivery openings, and at the open position the respective openings are fluidly connected.