Muffler for compact combustion engines
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorsMasanori Kobayashi, Tsuneyoshi Yuasa
Life of this patent
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Abstract
To provide a muffler for a compact combustion engine, which is simple in structure and effective to sufficiently reduce the temperature of exhaust gases while avoiding contact with an external air, an exhaust guide passage 7 for communicating the exhaust gases (G) to a discharge port (63) is provided within an interior hollow of a muffler housing 6 defining an exhaust chamber (61) therein, and a side wall of this exhaust guide passage (7) is constituted by a portion (6W) of the muffler housing (6) and a duct wall (71) jointed to the muffler housing (6).
Claims11
A muffler for a compact combustion engine for deadening exhaust gases emitted by the compact engine, which muffler comprises:
- a muffler housing defining an exhaust chamber therein;
- an exhaust guide passage provided within an interior hollow of the muffler housing and communicated with a discharge port;
- and
- a side wall defining the exhaust guide passage, the side wall being constituted by a portion of the muffler housing and a duct wall jointed to the muffler housing, and
- wherein the exhaust chamber is divided by a horizontally extending partition wall into an upper upstream compartment and a lower downstream compartment with a catalytic converter supported by the horizontally extending partition wall for substantially purifying the exhaust gases, and an inlet opening of the exhaust guide passage is positioned within the downstream compartment,
- wherein a downstream portion of the duct wall is positioned within the upstream compartment, and
- wherein the discharge port is positioned in an upper region of the upstream compartment.
A muffler assembly for a compact combustion engine comprising:
- a muffler housing having a first housing half member and a second housing half member collectively defining an exhaust chamber therein;
- an exhaust guide passage provided within an interior hollow of the muffler housing and communicated with a discharge port;
- a side wall defining the exhaust guide passage, the side wall being constituted by a portion of the second housing half member and a duct wall jointed to the second housing half member housing;
- a catalytic converter disposed within the interior hollow of the muffler housing for substantially purifying the exhaust gases and a partition wall disposed within the interior hollow for dividing the exhaust chamber into upstream and downstream compartments with respect to the catalytic converter and wherein at least a portion of the duct wall is positioned within the upstream compartment;
- and
- a muffler covering member enclosing the muffler housing, and
- wherein the exhaust chamber is divided by a horizontally extending partition wall into an upper upstream compartment and a lower downstream compartment with a catalytic converter supported by the horizontally extending partition wall for substantially purifying the exhaust gases, and an inlet opening of the exhaust guide passage is positioned within the downstream compartment,
- wherein a downstream portion of the duct wall is positioned within the upstream compartment, and
- wherein the discharge port is positioned in an upper region of the upstream compartment.
Dependencies are inferred from the claim text.