12 March 2002
In a news release issued yesterday, Engelhard Corporation announced it was granted a US patent titled “Low Pressure EGR System for Diesel Engines”. The patent covers an exhaust gas recirculation system targeting retrofit, heavy-duty diesel engine applications, as well as OEM markets. The system also incorporates particulate filters and, thus, is capable of simultaneous reduction of NOx and PM emissions.
Key elements of the Engelhard’s EGR system are:
- Placement of the EGR pick-up unit upstream of the exhaust soot filter to minimize fuel penalty
- Placement of an additional soot filter inside of the EGR pick-up unit to eliminate soot contamination of the engine
- Flexible corrugated EGR line for better heat transfer
- Use of a condensate remover to eliminate engine contamination with acidic water.