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High Efficiency Compression Ignition Aftertreatment Devices for Combined Use of Lean-Burn Combustion Systems and Three-Way Catalysts

Abstract: 

A high efficiency compression ignition after-treatment system of a combustion engine includes a first combustion chamber adapted to reciprocatably receive a first piston assembly and a second combustion chamber adapted to reciprocatably receive a second piston assembly. A combustion exhaust passage is coupled between the first and the second combustion chambers. A fuel passage may be connected to the first combustion chamber, and a fuel passage connected to the second combustion chamber. A processed exhaust passage is coupled to the second combustion chamber for receiving the processed exhaust therethrough. A fuel injector is coupled to the second combustion chamber. A three-way catalyst has an inlet coupled to the processed exhaust passage and an outlet coupled to an exhaust passage. An exhaust gas oxygen sensor is connected to the processed exhaust passage. A fuel controller is coupled to the fuel injector and the exhaust gas oxygen sensor.

Patent Number: 
6,543,398
Date Of Issue: 
04/08/2003
Inventors: 

Charles Edward Roberts Jr.;Rudolf Hermann Stanglmaier