Cummins Emission Solutions Inc.

Cummins Inc.

Cummins Ip, Inc.

Muntean, George

Steve Holl

Andrew Morgan Myer

George L Muntean

John K Heichelbech

Samuel Johnson

John Anthis

Joydeep Dipak Chakrabarti

Joshua D Henry

Stephanie L Apewokin

Jim F Burke

Chetan Ponnathpur

James F Burke

Yongquan Chai

Cynthia Gosselin

Kundana Inala

Nachiket Pawar

Melissa A Zaczek

Eric Burmeister

Nate Garrett

An exemplary embodiment includes a blending chamber having a urea inlet, a blending chamber gas inlet, and a blending chamber outlet. A urea source provides a pressurized urea solution to the urea inlet at a urea injection pressure, and a pressurized gas source transmits pressurized gas to the blending chamber gas inlet via a passageway. The passageway is configured to decrease pressure of the pressurized gas transmitted along its length from a first pressure of gas received from the pressurized gas source to a second pressure of gas provided to the blending chamber gas inlet. The first pressure of gas received from the pressurized gas source is greater than the urea injection pressure and the second pressure of gas provided to the blending chamber gas inlet is less than the urea injection pressure.

Air curtain for urea mixing chamber

Urea solution pumps having leakage bypass flowpaths and methods of operating the same are disclosed. Certain embodiments are pump apparatuses including an inlet passage in flow communication with a source of urea solution and a pump chamber, an outlet passage in flow communication with the pump chamber and an exhaust after treatment system, a diaphragm facing the pump chamber and coupled with an actuator, a first housing member coupled with a second housing member form a seal around the pumping chamber, a leak collection chamber surrounding the seal, and a return passage in flow communication with the leak collection chamber and the inlet passage. Urea solution that leaks from the pump chamber past the seal is received by the leak collection chamber and flows through the return passage to the pump inlet passage.

Urea solution pumps having leakage bypass

A system includes a cylindrical blend chamber having two inlets and one outlet. The outlet is fluidly coupled to a transfer line, and a nozzle is positioned downstream of the transfer line. The nozzle is fluidly coupled to an exhaust stream of an internal combustion engine. The system further includes a first inlet fluidly coupled to a diesel exhaust fluid (DEF) stream, and a second inlet fluidly coupled to an air stream. The DEF stream and the air stream intersect at a divergent angle.

System, method, and apparatus for delivering highly atomized diesel exhaust fluid to an exhaust aftertreatment system

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Columbus, IN, United States of America

Steve Holl