Patent ID: 11919603
Assignee: ZHEJIANG CFMOTO POWER CO., LTD
Field: Transport (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 21:
22. A straddle-type vehicle comprising:
a frame defining a front end and a rear end;
wheels including front and rear wheels supporting the frame;
an engine mounted on the frame for providing power to the vehicle, which comprises a main body and a cylinder head connected to the main body and positioned above the main body; the cylinder head having an exhaust channel for discharging exhaust gas;
an intake and exhaust system, comprising an intake assembly for supplying air to the engine and an exhaust assembly for discharging exhaust gas generated by the engine; the exhaust assembly having an exhaust pipe connected to the cylinder head and a muffler connected to the exhaust pipe, wherein one end of the exhaust pipe is connected to the cylinder head, and another end is connected to a middle portion of the muffler, wherein the tabular muffler defines:
a resonance cavity;
an exhaust cavity; and
an air intake cavity between the resonance cavity and the exhaust cavity;
wherein the exhaust pipe is connected to the air intake cavity; and
wherein exhaust gas enters into the resonance cavity through the air intake cavity, and then flows into the exhaust cavity;

a brake system associated with the wheels;
a transmission system for transmitting power from the engine to the wheels;
a fuel system for providing fuel to the engine; and
a saddle seat supported on the frame and located above the engine;, wherein the engine is oriented with its cylinder head positioned toward the rear end of the frame, and the opening direction of the exhaust channel faces toward the muffler.