초록 ▼

An exhaust gas purifier for a four-stroke internal combustion engine has a plurality of cylinders consisting of cylinder groups, each of which has at least two cylinders, and the opening durations of the exhaust valves in any one group do not overlap. The exhaust passages of the cylinders of one of

An exhaust gas purifier for a four-stroke internal combustion engine has a plurality of cylinders consisting of cylinder groups, each of which has at least two cylinders, and the opening durations of the exhaust valves in any one group do not overlap. The exhaust passages of the cylinders of one of the cylinder groups are connected to the atmosphere via a common reed valve.

대표청구항 ▼

An exhaust gas purifier in a four-stroke internal combustion engine having an exhaust passage and an air cleaner having therein a dust portion and a clean portion which is connected to a cylinder of the engine, said purifier comprising: a secondary air conduit communicating said dust portion with sa

An exhaust gas purifier in a four-stroke internal combustion engine having an exhaust passage and an air cleaner having therein a dust portion and a clean portion which is connected to a cylinder of the engine, said purifier comprising: a secondary air conduit communicating said dust portion with said exhaust passage; a silencer disposed in said secondary air conduit; a reed valve disposed in said secondary air passage between said silencer and said exhaust passage and arranged to open automatically in response to a decrease in pressure below a predetermined value in said exhaust passage to permit the supply of a secondary air into said exhaust passage; and an air filter disposed in said secondary air passage between said silencer and said reed valve.