Patent · US Expired

Emissions control

US6427436B1 · kind B1 · utility

86Cited by

13References

8Claims

0Family size

Assignee

Johnson Matthey Public Limited Company · GB

Inventors

Ronny Allansson · Kungsbacka, SE
Klas Anders Andreasson · Kungsängen, SE
Nils Myers · Lerum, SE
Ari Uusimaki · Gothenburg, SE
James Patrick Warren · Cambridge, GB

Key dates

Filing date	Apr 28, 2000
Grant date	Aug 6, 2002
Priority date	—
Expiry date	Apr 28, 2020

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M26/35
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A heavy duty diesel engine having an exhaust system incorporating a catalyst to convert NO to NO2 and a particulate trap on which soot particles are continuously oxidized, and a portion of the exhaust gases are recirculated through a cooler and exhaust gas flow valve before being mixed with air and fed to the engine cylinders. The system also incorporates a sensor to detect the amount of NOx in the exhaust to adjust the gas flow valve, thereby adjusting the portion of recirculated exhaust gas fed to the engine cylinders.

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