公开(公告)号：US20220275737A1

公开(公告)日：2022-09-01

申请号：US17189252

申请日：2021-03-01

Applicant: Caterpillar Inc.

Inventor： Dustin Irvin Landwehr ,  Jim K. Carroll ,  David Charles Copley ,  Rakesh Chandran Ramachandran ,  Timothy Josiah Lee ,  Yung T. Bui ,  Anthony C. Rodman

IPC: F01N1/02 ,  F01N1/04 ,  F01N3/28

Abstract: A reduction device includes a housing defining an input chamber configured to receive exhaust from a power source, an output chamber, an exhaust channel configured to direct the exhaust from the input chamber to the output chamber, and a longitudinal axis. The reduction device also includes a treatment unit disposed in the exhaust channel and along the longitudinal axis. The treatment unit is configured to at least partly remove pollutant species from the exhaust. The reduction device also includes an attenuation component disposed in the housing and radially outward of the treatment unit. The attenuation component is fluidly connected to the exhaust channel, and is configured to attenuate a range of frequencies corresponding to operation of the power source. Additionally, the exhaust channel prohibits exhaust entering the input chamber from exiting the housing without passing through the treatment unit.

公开(公告)号：US11808187B2

公开(公告)日：2023-11-07

申请号：US17189252

申请日：2021-03-01

Applicant: Caterpillar Inc.

Inventor： Dustin Irvin Landwehr ,  Jim K Carroll ,  David Charles Copley ,  Rakesh Chandran Ramachandran ,  Timothy Josiah Lee ,  Yung T. Bui ,  Anthony C. Rodman

IPC: F01N1/02 ,  F01N1/04 ,  F01N3/28

CPC classification number: F01N1/023 ,  F01N1/04 ,  F01N3/2825 ,  F01N2330/06 ,  F01N2490/155

Abstract: A reduction device includes a housing defining an input chamber configured to receive exhaust from a power source, an output chamber, an exhaust channel configured to direct the exhaust from the input chamber to the output chamber, and a longitudinal axis. The reduction device also includes a treatment unit disposed in the exhaust channel and along the longitudinal axis. The treatment unit is configured to at least partly remove pollutant species from the exhaust. The reduction device also includes an attenuation component disposed in the housing and radially outward of the treatment unit. The attenuation component is fluidly connected to the exhaust channel, and is configured to attenuate a range of frequencies corresponding to operation of the power source. Additionally, the exhaust channel prohibits exhaust entering the input chamber from exiting the housing without passing through the treatment unit.