Exhaust emission control device for motor bicycle
AssigneeSuzuki Kabushiki Kaisha
InventorAkio Matsumoto
Life of this patent
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Abstract
An improved exhaust emission control device is disposed in a motor bicycle of the type in which a muffler body, containing a catalyst for exhaust emission control, is connected to an exhaust pipe extending from the exhaust port of the associated engine, and the exhaust pipe is inserted into the muffler body through the front section thereof and extends through the inner space of the muffler body to the rear section thereof. The exhaust pipe is turned back in U-shape at the rear section to the front section of the inner space of the muffler body and the catalyst, supported by a partition wall which is disposed in the muffler body, is positioned in the vicinity of the opening of the exhaust pipe.
Claims15
An exhaust emission control device for a motor bicycle in which a muffler body, having an inner space and containing catalyst means for exhaust emission control, is connected to an exhaust pipe extending from an exhaust port of an engine, wherein the inner space of the muffler body is formed as an expansion chamber which is divided into at least front, intermediate and rear sections with respect to a flow of an exhaust by front and rear partition walls and said catalyst means is supported by the front partition wall, wherein said exhaust pipe is inserted into said muffler body from the front section thereof and extends through the inner space of the muffler body to the rear section thereof, at which the exhaust pipe is turned in U-shape so as to extend back to the front section of the inner space of the muffler body, said catalyst means being positioned in the vicinity of an opening of the U-turned front end of said exhaust pipe.
An exhaust emission control device for a motor bicycle in which a muffler body is connected to an exhaust pipe extending from an exhaust port of an engine unit, said exhaust emission control device comprising:
- an exhaust pipe inserted into an inner space of the muffler body and extending therethrough from a front portion of the muffler body with respect to a flow of an exhaust to a rear portion thereof;
- a plurality of partition walls disposed inside the inner space of the muffler body so as to divide the inner space into at least front, intermediate and rear sections;
- and
- catalyst means disposed inside the inner space of the muffler body and supported by one of the partition walls,
- wherein a front end of said exhaust pipe is turned at the rear section of the muffler body to extend back to the intermediate section thereof so as to provide a U-shape and said catalyst means is positioned in the vicinity of an opening of the U-turned front end of said exhaust pipe.
An exhaust system for a motor bicycle having an engine which burns fuel and produces exhaust gases, the exhaust system comprising:
- a muffler having an expansion chamber divided by at least front and rear partition walls into at least front, intermediate and rear axially-spaced sections;
- an exhaust pipe extending serially through the front section into the intermediate section, through the intermediate section into the rear section, and around the rear section back into the intermediate section where the exhaust pipe terminates in an outlet opening for discharging exhaust gases into the intermediate section;
- catalyst means disposed in a flow path between the intermediate and front sections for reacting with the exhaust gases during the flow thereof from the intermediate section to the front section;
- and conduit means for flowing the exhaust gases from the front section to the rear section for discharge from the muffler.
Dependencies are inferred from the claim text.