Crankcase combination capable of lowering engine oil loss

Abstract

The invention discloses a crankcase combination capable of lowering engine oil loss. A left crankcase and a right crankcase are both provided with waste gas inlets and waste gas channels; the rear section of the waste gas channel of the right crankcase waste channel is provided with an isolation plate to form two paths of channels; the waste gas channel of the right crankcase on the front section of the isolation plate is provided with an oil and gas separation guide plate; a channel entering a waste gas nozzle, which is formed by the isolation of the waste gas channel of the right crankcase and the isolation plate, forms bending-type communication; a baffle is arranged in an oil return cavity; another cavity is isolated out of the oil return cavity by the baffle; a gasket is provided with a second communication hole; and the other cavity isolated by the baffle is communicated with the waste gas channel of the left crankcase by the second communication hole. According to the crankcase combination disclosed by the invention, vaporized engine oil is easier to liquefy. Under the action of the oil and gas separation guide plate, the engine oil and the waste gas can be easily separated, and most parts of vaporized engine oil can flow back to the crankcase again so as to reduce abnormal loss of the engine oil in the crankcase, thereby being favorable for protecting the engine to enable the engine to normally work.

Description

technical field [0001] The invention relates to the improvement of the motorcycle engine crankcase technology, in particular to a motorcycle engine crankcase combination capable of reducing engine oil loss. [0002] Background technique [0003] In the crankcase of a motorcycle engine, the crankcase is formed by combining two parts of the left and right crankcases, and a gasket is provided on the surface of the combined box to seal it. In addition to preventing oil leakage after the combination of the left and right crankcases, the gasket also guides the oil and gas to follow the set path. [0004] Due to the increase of the displacement of the most commonly used CG series engines in the market, the temperature of the engine also increases, the viscosity of the oil decreases, the fluidity of the engine oil increases, and the vaporization phenomenon is more obvious. When the engine is in a high-speed state, the engine oil is likely to be ejected from the exhaust nozzle alon...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiency that the engine oil is easily ejected from the exhaust nozzle along with the exhaust gas in the existing crankcase assembly structure, the purpose of the present invention is to provide a crankcase assembly in which the engine oil is not easily ejected from the exhaust nozzle along with the exhaust gas.

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