Exhaust emission control system for internal combustion engine

Details Exhaust emission control system for internal combustion engine Exhaust emission control system for internal combustion engine

B - Operations, Transporting

01

D

B01D 53/94 (2006.01) B01J 23/00 (2006.01) B01J 23/34 (2006.01) B01J 23/46 (2006.01) B01J 23/63 (2006.01) B01J 35/00 (2006.01) B01J 23/02 (2006.01) B01J 23/10 (2006.01)

Patent

CA 2421404

An exhaust emission control system for an internal combustion engine is provided. The exhaust emission control system (4) includes a monolith catalyst (MC) that includes an oxygen storage agent and a noble metal-based three-way catalyst including Pd, Rh, and Pt disposed at an upstream location in the exhaust gas flow in the internal combustion engine (2), and a perovskite-type double oxide having a three-way catalytic function disposed at a downstream location in the exhaust gas flow. The amount C1 of Pd carried is 0.97 g/L <= C1 <= 1.68 g/L, the amount C2 of Rh carried is 0.11 g/L <= C2 <= 0.2 g/L, the amount C3 of Pt carried is 0.06 g/L <= C3 <= 0.11 g/L, the amount C4 of the oxygen storage agent carried is 25 g/L <= C4 <= 75 g/L, and the amount C5 of the perovskite-type double oxide carried is 5 g/L <= C5 <= 15 g/L. It is thereby possible to provide an exhaust emission control system that can reduce the production cost by reducing the amount of noble metal-based three-way catalyst used and at the same time can maintain a high exhaust emission control rate.

La présente invention concerne un dispositif (4) permettant de clarifier un gaz d'échappement issu d'un moteur à combustion interne (2). Ce dispositif est caractérisé en ce qu'il comprend un catalyseur monolithique (MC), présentant un catalyseur à trois composants à base de métaux nobles, tels que Pd, Rh et Pt, et un agent de stockage d'oxygène, qui sont placés en amont du gaz d'échappement, ainsi qu'un oxyde double de type pérovskite, présentant la fonction d'un catalyseur à trois composants, qui est placé en aval du gaz d'échappement. Les quantités transportées de Pd (C1), Rh (C2), Pt (C3), d'agent de stockage d'oxygène (C4) et d'oxyde double de type pérovskite (C5) sont respectivement fixées dans les plages suivantes : 0,97 g/L </= C1 </= 1,68 g/L, 0,11 g/L </= C2 </= 0,2 g/L, 0,06 g/L </= C3 </= 0,11 g/L, 25 g/L </= C4 </= 75 g/L et 5 g/L </= C5 </= 15 g/L. Le dispositif de clarification de gaz d'échappement selon cette invention peut être mis en oeuvre afin de réduire la quantité de catalyseur à trois composants à base de métaux nobles utilisé et par conséquent, de réduire les frais de production de celui-ci, tout en conservant un haut degré de clarification de gaz d'échappement.

Affiliated with

Also associated with

Rating

Exhaust emission control system for internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exhaust emission control system for internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust emission control system for internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1678109