摘要:
An engine for a personal watercraft that is equipped with a supercharging machine, including a pressure release device that is configured to, when a pressure in a region of an air-intake passage of the engine that is located upstream of a throttle valve in an intake-air flow direction exceeds a predetermined value, release the pressure outside the air-intake passage.
摘要:
An engine equipped with an air-intake device for a personal watercraft, includes a cylinder head cover attached to an upper surface of a cylinder head, a plug cap with ignition coil configured to protrude upward from an upper surface of the cylinder head cover; and an air box for the air-intake device that is disposed above the cylinder head cover and is provided on a lower surface thereof with an air inlet that opens to be opposite to the upper surface of the cylinder head cover. The air box is disposed in such a manner that the lower surface of the air box is opposite to the upper surface of the cylinder head cover and a gap is formed between the lower surface of the air box and the upper surface of the cylinder head cover so as to form an air flow in the vicinity of the plug cap with ignition coil that is directed to the air inlet of the air box.
摘要:
A personal watercraft is disclosed. The personal watercraft typically includes a body formed by a hull and a deck covering the hull from above and having an inner space defined by the hull and the deck, an engine accommodated in the inner space of the body, and an exhaust pipe accommodated in the inner space and configured to guide an exhaust gas emitted from the engine outside the body. The body is typically provided with a penetrating hole through which an inside of the body and an outside of the body communicate with each other. The exhaust pipe is typically configured to extend through the penetrating hole and mounted to the body by a mounting device in the vicinity of the penetrating hole, and the mounting device is removably mounted to the body from outside the body.
摘要:
An engine for a personal watercraft uses an open-looped cooling system and comprises a cylinder block having a water jacket within which cooling water flows, and a piston that reciprocates within the cylinder block, and a dimension of the water jacket in a reciprocation direction of the piston is equal to or less than a half of a reciprocation distance of the piston.