Method for measuring condensable particulate matters formed from exhaust gas

A method for measuring in real-time condensable particulate matter formed from exhaust gas of an internal combustion engine, comprising the steps of:

• sucking exhaust gas from the internal combustion engine;
• diluting the sucked exhaust gas to simulate it to atmospheric condition;
• a first measurement step of branching some of the exhaust gas of the atmospheric condition and measuring particulate matter including condensable particulate matter and filterable particulate matter;
• a second measurement step of branching the rest of the exhaust gas of the atmospheric condition to remove the condensable particulate matter and measuring the particulate matter including only the filterable particulate matter;
• and
• comparing the first measurement step and the second measurement step to calculate an amount of the condensable particulate matter in the exhaust gas of the atmospheric condition,
• wherein the step of diluting the sucked exhaust gas to simulate it to atmospheric condition is performed by injecting air into the exhaust gas in a dilution chamber and in a range of −10° C. to 50° C. through a cooler and a heater,
• wherein in the step of diluting the sucked exhaust gas to simulate it to atmospheric condition, a ratio of the air to a volume of the exhaust gas is made in a dilution ratio of 1:9 to 1:29,
• wherein some of the exhaust gas in the atmospheric condition is branched to a bypass pipe, and the first measurement step is performed and rest of the exhaust gas in the atmospheric condition is branched to a thermodenuder and the second measurement step is performed, and
• wherein the thermodenuder is heated in a range of 25° C. to 300° C. and the condensable particulate matter is removed by being adsorbed on a carbon cloth inside the thermodenuder.