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US 9,080,497 B2Granted
Water-cooled engine
AssigneeHonda Motor Co., Ltd.
InventorsHayato Yamashiro, Masazumi Naito, Hidetoshi Wakasa, Takuya Miyamura, Hiroyuki Sugiura
Life of this patent
Estimating the term…
Abstract
A water-cooled engine includes first connection paths continuous with a cylinder-head-side water jacket and a second connection path continuous with a cylinder-body-side water jacket. The paths are disposed in a sidewall of a cylinder body. A thermostat valve is attached to the sidewall. An oil cooler having a cooling water lead-in pipe and a cooling water lead-out pipe is attached to one sidewall of an engine main body to face the same direction as that of the thermostat valve. The cooling water lead-in pipe and the cooling water lead-out pipe are connected to the thermostat valve.
Claims18
A water-cooled engine, comprising:
- a cylinder-body-side water jacket disposed in a cylinder body that is coupled to a crankcase rotatably supporting a crankshaft and has a cylinder bore;
- a cylinder-head-side water jacket disposed in a cylinder head coupled to the cylinder body;
- a water pump configured to circulate cooling water between the cylinder-body-side and cylinder-head-side water jackets and a radiator, said water pump being disposed on an engine main body, wherein
- the cylinder-body-side and cylinder-head-side water jackets are configured such that the cooling water is allowed to flow in the water jackets independently of each other,
- a first connection path continuous with the cylinder-head-side water jacket connected to one of an inlet port and a discharge port of the water pump and a second connection path continuous with the cylinder-body-side water jacket connected to another of the inlet port and the discharge port are disposed in a sidewall of the cylinder body, said engine further comprising
- a thermostat valve configured to switch between a state in which the first and second connection paths communicate with each other and a state in which the first and second connection paths are connected to each other via the radiator, said thermostat valve being attached to the sidewall of the cylinder body;
- and
- a water-cooling oil cooler having a cooling water lead-in pipe configured to take in the cooling water and a cooling water lead-out pipe configured to lead out the cooling water is so attached to one sidewall of the engine main body as to protrude in a same direction as an actuation axis line of the thermostat valve, wherein
- the cooling water lead-in pipe is so connected to the thermostat valve as to communicate with the water jacket connected to the discharge port of the water pump, of the cylinder-body-side and cylinder-head-side water jackets, and the cooling water lead-out pipe is so connected to the thermostat valve as to communicate with the water jacket connected to the inlet port of the water pump, of the cylinder-body-side and cylinder-head-side water jackets.
6 more elements
A water-cooled engine, comprising:
- cylinder-body-side water jacket means for containing cooling water disposed in a cylinder body that is coupled to a crankcase rotatably supporting a crankshaft and has a cylinder bore;
- cylinder-head-side water jacket means for containing the cooling water disposed in a cylinder head coupled to the cylinder body;
- water pump means for circulating the cooling water between the cylinder-body-side and cylinder-head-side water jacket means and a radiator means, said water pump means being disposed on an engine main body, wherein the cylinder-body-side and cylinder-head-side water jacket means are also for allowing the cooling water to flow in the water jacket means independently of each other;
- first connection path means continuous with the cylinder-head-side water jacket means connected to one of an inlet port and a discharge port of the water pump means and a second connection path means continuous with the cylinder-body-side water jacket means connected to another of the inlet port and the discharge port are disposed in a sidewall of the cylinder body, said engine further comprising
- thermostat valve means for switching between a state in which the first and second connection path means communicate with each other and a state in which the first and second connection path means are connected to each other via the radiator, said thermostat valve means being attached to the sidewall of the cylinder body;
- and
- water-cooling oil cooler means having cooling water lead-in means for taking in the cooling water and cooling water lead-out means for leading out the cooling water is so attached to one sidewall of the engine main body as to protrude in a same direction as an actuation axis line of the thermostat valve means, wherein
- the cooling water lead-in means is so connected to the thermostat valve means as to communicate with the water jacket means connected to the discharge port of the water pump means, of the cylinder-body-side and cylinder-head-side water jacket means, and the cooling water lead-out means is so connected to the thermostat valve means as to communicate with the water jacket means connected to the inlet port of the water pump means, of the cylinder-body-side and cylinder-head-side water jacket means.
5 more elements
Dependencies are inferred from the claim text.