Engine

Abstract

The invention provides an engine that can increase the resistance to inclination and efficiently cool a magneto. The engine (1) includes a crankcase (10) that houses a crankshaft (10), an oil pan (50) that is provided at a lower part of the crankcase and reserves an oil, a magneto chamber (M) that is provided adjacent to one of ends of the crankcase in a rotation axis direction of the crankshaft, houses a magneto (60), and reserves an oil in a lower part of the magneto chamber, and a sub oil pan (80) that is horizontally offset with respect to the oil pan, is disposed under the magneto chamber and adjacent to the magneto chamber via a partition wall, and is capable of letting in an oil from the oil pan. .

Description

technical field [0001] The present invention relates to a wet oil sump engine, and more particularly, to an engine with improved tilt resistance and effective cooling of a permanent magnet generator. Background technique [0002] In a wet sump engine commonly used for off-road vehicles such as four-wheeled ATVs, lubricating oil is stored in an oil pan provided at the lower part of the crankcase, and oil is filtered from The oil pressure sucked up by the device is sent to various parts that need to be lubricated. [0003] In the case of such a wet oil sump engine, if the engine is tilted due to driving on bad roads, etc., a part of the liquid level (oil level) of the oil pan will tilt with respect to the engine. [0004] At this time, if the oil surface comes into contact with rotating parts such as the crankshaft, the oil will be lifted up inside the engine and become mist, causing problems such as oil spray from the vent hole. [0005] On the other hand, in multi-cylinder...

AI Technical Summary

Problems solved by technology

[0004] At this time, if the oil surface touches rotating parts such as the crankshaft, the oil will be lifted up inside the engine and become mist, causing problems such as oil spray from the vent hole.

[0005] On the other hand, in multi-cylinder engines for off-road vehicles, even if a large amount of oil is required, it is difficult to increase the depth of the oil pan in order to ensure mountability and ride-through performance.

[0006] Conversely, if the amount of oil is reduced, the maintenance cycle will be shortened, impairing user convenience

[0007] In addition, if a dry sump type with an oil storage tank independent of the crankcase is used, the overall height of the engine can be controlled and the oil quantity can be secured, but the number of parts will increase and the structure will be complicated, and the weight and cost will also increase.

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