METHOD FOR INSPECTING OPERABILITY OF CATALYST FOR EXHAUST GAS PURIFICATION

• Main Authors: KREUZER THOMAS DR, LOX EGBERT DR, NEUHAUSEN ULRICH, GIESHOFF JUERGEN DR, KLEIN HARALD DR
• Format: Patent
• Language: English
• Published: 07.12.2001
• Edition: 7
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CONTROLLING COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MEASURING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; SEPARATION; STEAM ENGINES; TESTING; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To provide a method for inspecting operability of a catalyst, which memorizes ignition temperature and a conversion ratio rCO of a carbon monoxide (CO), for purifying exhaust gas of a diesel engine by combining direct measurements of concentration of the carbon monoxide and measurements of temperature. SOLUTION: In order to evaluate the remaining catalytic operability of a catalyst, temperature TE of exhaust gas at an outlet of a catalyst and temperature difference ΔT between TE and ignition temperature TCO,50,flesh of the carbon monoxide in a new catalyst which is stored in the catalyst as a function of a speed and a load ΔT=TE-TCO,50,flesh are measured to determine the conversion ratio rCO of the carbon monoxide.