Research Of Small Multipurpose Gasoline Engine Emission

Domestic general machinery is developing quickly like as the automobile and motorcycle developed. In 2007, the total output was up to 12,000,000pcs in our country, and about 85% was exported directly. The emission regulations are strict stage by stage in America and Europe. In the meantime, TICERI has organized 30 domestic general machine manufacturers to draft the Chinese emission regulation. The paper first detailedly describes and analyzes the general gasoline engine emission regulations.According to factory reality, it is emphasis to research the general gasoline engine 1E39F emission that is tough before. Referring the happening reason and status of general engine emission, test the 1E39F original emission to gain the primary data.Base on the existing methods of general gasoline engine emission controlling, creates the plan of 1E39F emission improvement. The paper innovation is how to improve the hand-held small general gasoline engine emission.Analyzing 1E39F configuration, use series internal purifying methods, like carburetor optimization, ignition assembly improving and intake optimization, let 1E39F original emission reduce obviously.Finally, increase the catalyst in 1E39F after above purifying methods and understood chemical catalysis principle. 1E39F emission completely reaches the strict standards of developed countries.Combining internal and external purification methods, verified by bench testing, obtain a great of testing data and conclusion. The researching result can be referred by entire general engine domain for exhaust emission controlling and improving.