Outboard engine and separated lubricating system thereof

Abstract

The invention discloses a separated lubricating system of an outboard engine. The system comprises a crankcase and a power assembly arranged in a cavity of the crankcase, the system further comprises a lubricating oil tank, a first oil pump and a plurality of first oil pipes mounted on the first oil pump, the first oil pump communicates with the cavity of the crankcase through the multiple first oil pipes, and the first oil pump extracts lubricating oil from the lubricating oil tank and conveys the lubricating oil into the crankcase to lubricate the power assembly; the first oil pump is linked with the engine, so that the first oil pump conveys the lubricating oil with the oil quantity adaptive to the working condition of the engine into the crankcase; and meanwhile, the bottom of the cavity of the crankcase communicates with the upper portion of the cavity of the crankcase through a second oil pipe, so that the lubricating oil at the bottom of the cavity is conveyed to the upper portion of the cavity through the second oil pipe under the action of negative pressure. The separated lubricating system is adopted, so that the consumption of the lubricating oil can be reduced, and carbon deposition and exhaust emission can be improved; and the lubricating oil directly enters into the crankcase without being diluted by fuel oil, and the viscosity of the lubricating oil is large, so that cooling and lubrication of the power assembly are facilitated.

Description

technical field [0001] The invention relates to the technical field of motors, more specifically, it relates to outboard motors and their separate lubricating systems. Background technique [0002] At present, the lubrication method of two-stroke outboard engines generally adopts the mixed lubrication method; that is, the lubricating oil is added to the fuel according to the required ratio, and the mixture is stirred and then added to the fuel tank. When the engine is working, the mixed oil enters the crankcase after being atomized by the carburetor and then enters the cylinder to achieve the purpose of lubrication. Although this kind of lubrication method is reliable, because the mixing ratio is a fixed value, it cannot be changed in time according to the engine working conditions, resulting in too thick lubricating oil at idle speed and excessive consumption of lubricating oil; moreover, lubricating oil participates in combustion, which is prone to carbon deposits. And a ...

AI Technical Summary

Problems solved by technology

Although this kind of lubrication method is reliable, because the mixing ratio is a fixed value, it cannot be changed in time according to the engine working conditions, resulting in too thick lubricating oil at idle speed and excessive consumption of lubricating oil; moreover, lubricating oil participates in combustion, which is prone to carbon deposits. And a large amount of harmful substances produced by incomplete combustion are discharged with the exhaust gas of the engine to pollute the air and water

Images