Title:
【発明の名称】燃料経済を最大限にする一方での、エンジンからのNOx排出の削減
Document Type and Number:
Japanese Patent JP2002512666
Kind Code:
A
Abstract:
Exhaust gas recirculation and selective catalytic reduction with urea or other NOx- reducing reagent are employed to enable good fuel economy and low emissions from diesel and lean-burn gasoline engines. EGR is operated at low-load, as well as when problems are experienced with reagent supply or the SCR unit. The SCR is run at its optimum operating conditions of normal to high load, supplanting the need for EGR. The net effect is a circumvention of the known tradeoff between NOx and poor fuel economy. The novel application of SCR and EGR in combination will provide engines that meet low emissions requirements with existing technology.
Inventors:
Talabalski, Theodore Jay
Application Number:
JP54287498A
Publication Date:
April 23, 2002
Filing Date:
April 01, 1998
Export Citation:
Assignee:
Clean Diesel Technologies, Inc.
International Classes:
B01D53/86; B01D53/94; F01N3/00; F01N3/08; F01N3/20; F01N3/24; F02D21/08; (IPC1-7): F01N3/08; F01N3/24; F02D21/08
Attorney, Agent or Firm:
Takehiko Saito (1 outside)