Document Type and Number:
Japanese Patent JPS5749728
Kind Code:
B2
Abstract:
A high-efficiency combustion gas exhaust system for four-stroke internal combustion engines. This system uses two overlapping converging conical pipes to provide excellent scavenging at high piston speeds without the usual adverse effects at idle or moderate speeds. A generally conical converging first pipe is installed over the exhaust gas opening in the engine head. A second pipe with a generally converging conical introductory section is secured in an overlapping relationship to the first pipe. Certain size relationships among these components are important in obtaining optimum performance.
Application Number:
JP6511879A
Publication Date:
October 23, 1982
Filing Date:
May 28, 1979
Export Citation:
International Classes:
F01N7/00; F01N13/08; F02B27/04; F02B75/02
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