Outboard motor
AssigneeSuzuki Kabushiki Kaisha
InventorsTakeshi Toyama, Satoshi Isobe, Keiji Imanaga
Life of this patent
Estimating the term…
Abstract
An outboard motor includes an engine holder, an engine which is disposed above the engine holder in a state of the outboard motor mounted to a hull and in which a crankshaft extends substantially perpendicularly, and an oil pan disposed below the engine holder. A drive shaft housing is disposed below the oil pan and is formed with an exhaust chamber and a water pump is driven by the drive shaft so as to pump up a cooling water. A cooling water passage is formed in the oil pan and the drive shaft housing to guide the cooling water pumped up by the water pump to the engine. A relief valve is disposed on the way of the cooling water passage so as to discharge the cooling water into the exhaust chamber.
Claims7
An outboard motor comprising:
- an engine holder;
- an engine which is disposed above the engine holder in a state wherein the outboard motor is mountable to a hull and in which a crankshaft is extendable substantially perpendicularly;
- an oil pan disposed below the engine holder;
- a drive shaft housing disposed below the oil pan;
- an exhaust passage formed in the engine, the engine holder and the oil pan for discharging an exhaust gas from the engine in the drive shaft housing;
- a cooling water passage and a return-water passage disposed in a vicinity of the exhaust passage;
- and
- fixing means disposed in the engine holder for fixing the oil pan to the engine holder,
- wherein said oil pan comprises vertical wall sections and outer wall sections, said outer wall sections being disposed outside the vertical wall sections, by which said exhaust passage, said cooling water passage and said return-water passage are formed, a juncture portion is formed between the engine holder and the oil pan, and said fixing means is provided for said vertical wall sections.
An outboard motor comprising:
- an engine holder;
- an engine which is disposed above the engine holder in a state of the outboard motor being mountable to a hull and in which a crankshaft is extendable substantially perpendicularly;
- an oil pan disposed below the engine holder;
- a drive shaft housing which is disposed below the oil pan and in which an exhaust chamber is formed and the drive shaft extends vertically;
- a water pump driven by the drive shaft so as to pump up cooling water;
- a cooling water passage formed in the oil pan and the drive shaft housing to guide the cooling water pumped up by the water pump to the engine;
- and
- a relief valve in communication with the cooling water passage so as to discharge the cooling water into the exhaust chamber,
- said oil pan being provided, at a bottom surface thereof, with a horizontal cooling water passage which extends in a horizontal direction and to which the cooling water is guided from the water pump, provided with a vertical cooling water passage extending towards the engine from an intermediate portion of said horizontal cooling water passage and provided with a relief port disposed at a portion upstream side of a connecting portion of said horizontal and vertical cooling water passages so as to be opened towards the exhaust chamber, said relief valve being mounted to said relief port.
Dependencies are inferred from the claim text.