LUBRICATION SYSTEM FOR FOUR-STROKE ENGINE

摘要

An engine includes an oil pan used for storing lubricating oil, a crankcase, a cam box, a rocker, and a distribution chamber used for separating oil & gas mixture into oil mist and liquid oil. A lubricating system comprises: the oil pan and the crankcase are communicated through an oil supply passage, and a one-way valve is disposed in the oil supply passage; the crankcase and the distribution chamber are communicated through a first oil conveying passage, and a one-way valve is disposed in the first oil conveying passage; the distribution chamber and the cam box are communicated through a second oil conveying passage; the cam box and the rocker chamber are communicated through a third oil conveying passage; the rocker chamber and the crankcase are communicated through at least one oil return passage, and a one-way valve is disposed in the oil return passage.

主权项

1. A four-stroke engine lubricating system, wherein the four-stroke engine comprises:
an oil pan (2) for storing lubricating oil; a crankcase (1); a cam box (3); a rocker chamber (4); and a distribution chamber (5) communicated with the oil pan (2) and used for separating oil & gas mixture into oil mist and liquid oil; the four-stroke engine lubricating system is characterized in that the lubricating system is as follows: the oil pan (2) and the crankcase (1) are communicated through an oil supply passage (21), and a first one-way valve (211) is disposed in the oil supply passage (21);the crankcase (1) and the distribution chamber (5) are communicated through a first oil conveying passage (15), and a second one-way valve (151) is disposed in the first oil conveying passage (15); the distribution chamber (5) and the cam box (3) are communicated through a second oil conveying passage (53); the cam box (3) and a rocker chamber (4) are communicated through a third oil conveying passage (34); the rocker chamber (4) and the crankcase (1) are communicated through at least one oil return passage (41), and a third one-way valve (413) is disposed in the oil return passage (41).