Abstract:

Experimental study was done on a turbocharged four-cylinder compression ignition engine fueled with diesel, PODE and diesel/PODE blended-fuel in order to reduce the particle material emission of compression ignition engines. Scanning mobility particle sizer (SMPS) was used to measure the particle size distribution. The test results showed that the particle emission of PODE engine was concentrated on the small diameter scale of less than 30 nm, whereas the diesel engine was mainly between 10 nm and 200 nm. Both ultrafine particle emission and total particle volume of blended-fuel engine was obvious decreased compared
with original diesel engine at a proper blending ratio. At fixed engine speed, the number concentration of particle emission increased with the increase of engine load, while the specific number concentration decreased. On the other hand, the specific number concentration of particulate became more with the increase of engine speed under the same engine load.

Key words: compression ignition engine, polyoxymethylene dimethyl ethers (PODE), emission, particle size distribution, scanning mobility particle sizer (SMPS)