公开(公告)号：US12209524B2

公开(公告)日：2025-01-28

申请号：US17894151

申请日：2022-08-23

Applicant: Caterpillar Inc.

Inventor： Samuel S. Kumar ,  Anthony C. Rodman ,  Kelsey A. Unser ,  Ramakrishna Manda ,  Glen C. Martin

IPC: F01N3/20 ,  B01F25/312 ,  F01N3/28

Abstract: A diesel exhaust fluid (DEF) nozzle includes a first conduit, an outlet of the first conduit defining an inlet of a first mixing chamber; and a second conduit disposed around the first conduit, an outer surface of the first conduit and an inner surface of the second conduit defining a second flow path therebetween. A flow area of the second flow path decreases from an inlet of the second flow path to a throat, and increases from the throat to an outlet of the second flow path. The inner surface of the second conduit defines a peripheral wall of the first mixing chamber, and a peripheral wall of a second mixing chamber, the first flow path and the second flow path being in fluid communication with the second mixing chamber via the first mixing chamber.

公开(公告)号：US20220364490A1

公开(公告)日：2022-11-17

申请号：US17317865

申请日：2021-05-11

Applicant: Caterpillar Inc.

Inventor： Samuel S. Kumar ,  Matthew F. Fahrenkrug ,  Daniel R. Barb ,  Ramakrishna Manda ,  Paul A. Zwart ,  Thierry A. Marchione ,  Kevin L. Martin

IPC: F01N3/20 ,  F01N3/30

Abstract: An injector for a diesel exhaust fluid (DEF) delivery system includes a first conduit extending along a longitudinal direction; a second conduit extending along the longitudinal direction and disposed within the first conduit; a nozzle tip having a side wall and an end wall; and a shell surrounding the first conduit and being spaced apart from the first conduit along a radial direction. The side wall has a thickness extending along the radial direction from an external surface of the nozzle tip to an inner surface of the second conduit. The end wall defines an outlet flow passage therethrough, and the outlet flow passage is in fluid communication with the first conduit and the second conduit via a chamber defined by an internal surface of the nozzle tip.

公开(公告)号：US20240068388A1

公开(公告)日：2024-02-29

申请号：US17894151

申请日：2022-08-23

Applicant: Caterpillar Inc.

Inventor： Samuel S. Kumar ,  Anthony C. Rodman ,  Kelsey A. Unser ,  Ramakrishna Manda ,  Glen C. Martin

IPC: F01N3/20 ,  F01N3/28

CPC classification number: F01N3/208 ,  F01N3/206 ,  F01N3/28

Abstract: A diesel exhaust fluid (DEF) nozzle includes a first conduit, an outlet of the first conduit defining an inlet of a first mixing chamber; and a second conduit disposed around the first conduit, an outer surface of the first conduit and an inner surface of the second conduit defining a second flow path therebetween. A flow area of the second flow path decreases from an inlet of the second flow path to a throat, and increases from the throat to an outlet of the second flow path. The inner surface of the second conduit defines a peripheral wall of the first mixing chamber, and a peripheral wall of a second mixing chamber, the first flow path and the second flow path being in fluid communication with the second mixing chamber via the first mixing chamber.