Patent · US Active

System and method for regulating exhaust emissions

US9616385B1 · kind B1 · utility

5Cited by

1References

20Claims

0Family size

Assignee

Deere & Company · US

Inventors

Shyan-Cherng Huang · Cedar Falls, US
Taner Tuken · Cedar Falls, US
Thomas M. Harris · Pasadena, US

Key dates

Filing date	Sep 30, 2015
Grant date	Apr 11, 2017
Priority date	—
Expiry date	Oct 6, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

An exhaust gas treatment system for an internal combustion engine includes an exhaust gas pathway configured to receive exhaust gas from the internal combustion engine, an ammonia source, and a first ammonia injector in fluid communication with the ammonia source. The first ammonia injector is configured to inject ammonia into the exhaust gas pathway at a first rate. The exhaust gas treatment system also includes a first treatment element positioned downstream of the first ammonia injector and a second ammonia injector in fluid communication with the ammonia source and positioned downstream of the first treatment element. The second ammonia injector is configured to inject ammonia into the exhaust gas pathway at a second rate different from the first rate. The exhaust gas treatment system further includes a second treatment element positioned downstream of the second ammonia injector.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.