Cummins Emission Solutions Inc.

Joshua D Henry

George L Muntean

Samuel Johnson

Andrew Morgan Myer

John Anthis

Srivardhan Chandrapati

Stephanie L Apewokin

Joydeep Dipak Chakrabarti

Steve Holl

Omkar Tendolkar

Aalok Trivedi

John K Heichelbech

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

A system is provided for delivery of diesel exhaust fluid or other reductant to an injector for release into an engine exhaust aftertreatment system. The injector includes a nozzle assembly that thermally shields the diesel exhaust fluid from the exhaust gas temperatures. A diesel exhaust fluid delivery procedure is also disclosed for nozzle cooling prior to operation of the injector for emissions reduction.

Systems and techniques for nozzle cooling of diesel exhaust fluid injection systems

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Indianapolis, IN, United States of America

Joshua D Henry