To increase the wind volume of the cooling wind flowing through a radiator and to enhance the cooling performance of the radiator by providing a wind exhaust duct using a crankcase of an internal combustion engine. A cooling device of the internal combustion engine includes a radiator arranged later
To increase the wind volume of the cooling wind flowing through a radiator and to enhance the cooling performance of the radiator by providing a wind exhaust duct using a crankcase of an internal combustion engine. A cooling device of the internal combustion engine includes a radiator arranged lateral to crankcases. A wind exhaust duct exhausts the cooling wind passed through the radiator to the atmosphere. The wind exhaust duct is extends along a rotational axis of the crankshaft at the upper portion of the crankcases and the upper portion of the transmission case.
대표청구항▼
What is claimed is: 1. An internal combustion engine comprising: an engine main body configured by a crankcase; and a cooling device including a radiator arranged lateral to the engine main body, said cooling device including a wind exhaust duct for exhausting exhausted wind, which is cooling wind
What is claimed is: 1. An internal combustion engine comprising: an engine main body configured by a crankcase; and a cooling device including a radiator arranged lateral to the engine main body, said cooling device including a wind exhaust duct for exhausting exhausted wind, which is cooling wind passed through the radiator, to an atmosphere, wherein the wind exhaust duct is arranged on an upper portion of the crankcase. 2. The internal combustion engine according to claim 1, wherein a power transmission system including a transmission case for accommodating a transmission is arranged on the side opposite to the radiator with the crankcase in between in a direction of a rotational axis of a crankshaft supported by the crankcase, and the wind exhaust duct extends along the rotational axis of the crankshaft and is positioned on the upper portion of the transmission case. 3. The internal combustion engine according to claim 2, wherein the internal combustion engine is supported by a body frame at supporting parts arranged at a lower portion of the crankcase. 4. The internal combustion engine according to claim 1, wherein the internal combustion engine is supported by a body frame at supporting parts arranged at a lower portion of the crankcase. 5. A vehicle with wheels, the vehicle comprising: an internal combustion engine mounted thereon, the internal combustion engine including an engine main body configured by a crankcase, and a cooling device, the cooling device including: a radiator arranged lateral to the engine main body; a wind exhaust duct for exhausting exhausted wind, which is cooling wind passed through the radiator, from a wind exhaust outlet portion to an atmosphere, wherein the wind exhaust duct is arranged on an upper portion of the crankcase. 6. The vehicle according to claim 5, further comprising: a fender for covering the wheel from an outer side in a radial direction having a rotational axis of the wheel as a center, wherein the exhausted wind is exhausted to a space formed between the wheel on an inner side in the radial direction and the fender using an opening formed in the fender. 7. The vehicle according to claim 6, wherein the wind exhaust outlet portion opens at a position facing a tread of the wheel in the radial direction, and a shielding part for suppressing foreign materials, that are taken up by the wheel or foreign materials that are attached to the tread and scattered by a centrifugal force, from entering inside the wind exhaust duct, the shielding part being arranged in the wind exhaust duct or the fender. 8. The vehicle according to claim 7, wherein the shielding part extends along an outer surface of the crankcase. 9. The vehicle according to claim 5, further comprising: a fender for covering the wheel from an outer side in a radial direction having a rotational axis of the wheel as a center, wherein the wind exhaust duct is coupled with the fender, and the wind exhaust outlet portion is formed by a coupling portion that couples the wind exhaust duct to the fender. 10. The vehicle according to claim 6, wherein the exhausted wind is exhausted from the wind exhaust outlet portion to a space formed between the wheel and the fender or to a space formed between the wheel and the crankcase in a rotating direction at a region closest to the wind exhaust outlet portion in the wheel. 11. The vehicle according to claim 9, wherein the exhausted wind is exhausted from the wind exhaust outlet portion to a space formed between the wheel and the fender or to a space formed between the wheel and the crankcase in a rotating direction at a region closest to the wind exhaust outlet portion in the wheel. 12. The vehicle according to claim 5, wherein the wind exhaust outlet portion opens at a position facing a tread of the wheel in the radial direction, and a shielding part for suppressing foreign materials, that are taken up by the wheel or foreign materials that are attached to the tread and scattered by a centrifugal force, from entering inside the wind exhaust duct, the shielding part being arranged in the wind exhaust duct or the fender. 13. The vehicle according to claim 12, wherein the shielding part extends along an outer surface of the crankcase. 14. The vehicle according to claim 12, wherein the exhausted wind is exhausted from the wind exhaust outlet portion to a space formed between the wheel and the fender or to a space formed between the wheel and the crankcase in a rotating direction at a region closest to the wind exhaust outlet portion in the wheel. 15. The vehicle according to claim 5, wherein the exhausted wind is exhausted from the wind exhaust outlet portion to a space formed between the wheel and the fender or to a space formed between the wheel and the crankcase in a rotating direction at a region closest to the wind exhaust outlet portion in the wheel.
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이 특허를 인용한 특허 (5)
Asano, Tatsuhiko, Arrangement structure of radiator reservoir tank of motorcycle.
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