Exhaust gas dilution apparatus and particle measurement apparatus including the same

An exhaust gas dilution apparatus comprising:

• a sampler having a first end configured to be arranged in a pipe configured to convey an exhaust gas and to provide a path through which a portion of the exhaust gas flows to a second end of the sampler external to the pipe;
• a diluter configured to receive the portion of the exhaust gas from the sampler and dilute the portion of the exhaust gas with an external gas to generate diluted gas;
• and
• a housing unit surrounding the diluter and configured to prevent at least one of the exhaust gas and the diluted gas from leaking from the diluter,
• wherein the diluter comprises:
• a first dilution chamber configured to receive the portion of the exhaust gas from the sampler and to receive the external gas, and to dilute the exhaust gas with the external gas to generate a first diluted gas;
• and
• a second dilution chamber configured to receive the first diluted gas from the first dilution chamber and to receive the external gas, and in which the first diluted gas is further diluted by the external gas to generate a second diluted gas.

A particle measurement apparatus comprising:

• a sampler having a first end configured to be arranged in a pipe through which exhaust gas moves and configured to provide a path through which a portion of the exhaust gas flows to outside of the pipe;
• a diluter configured to receive the portion of the exhaust gas from the sampler and dilute the portion of the exhaust gas with an external gas to generate diluted gas;
• a particle measurement device configured to measure particles in the diluted gas;
• and
• a housing unit surrounding the diluter and the particle measurement device and configured to prevent leakage of the exhaust gas from at least one of the diluter and the particle measurement device, wherein the diluter comprises at least one dilution chamber configured to receive the portion of the exhaust gas from the sampler and the external gas, and configured to dilute the exhaust gas by the external gas to generate the diluted gas.