LUBRICATING DEVICE FOR ENGINE

摘要

A lubricating device for an engine is provided. A first opening part penetrates a first partition wall separating a crank chamber and an oil sump chamber. A second opening part penetrates a second partition wall separating the crank chamber and a valve drive chamber. In a lubricating device for an engine, when the pressure in the crank chamber is positive, gas in the crank chamber is injected into the oil sump chamber through the first opening part and impacts oil, thus generating mist oil in the oil sump chamber, and mist oil in the crank chamber passes through the second opening part and is supplied to the valve drive chamber, whereas when the pressure in the crank chamber is negative, mist oil in the oil sump chamber passes through the first opening part and is supplied to the crank chamber.

主权项

1. A lubricating device for an engine, comprising:
a crank chamber, a pressure in which varies as a piston moves up and down; an oil sump chamber which is disposed below the crank chamber and that stores a lubricating oil; a valve drive chamber which is disposed on a side of the crank chamber and that accommodates drive components of each valve mechanism for intake and exhaust; a first partition wall that separates the crank chamber and the oil sump chamber; a second partition wall that separates the crank chamber and the valve drive chamber; a first opening part that penetrates the first partition wall and provides communication between the crank chamber and the oil sump chamber; and a second opening part that penetrates the second partition wall and provides communication between the crank chamber and the valve drive chamber, wherein, in the case in which a pressure in the crank chamber is a positive pressure, a gas in the crank chamber is injected into the oil sump chamber through the first opening part and impacts an oil in the oil sump chamber thereby to generate a mist oil in the oil sump chamber, and a mist oil in the crank chamber passes through the second opening part and is supplied to the valve drive chamber, and in the case in which the pressure in the crank chamber is a negative pressure, the mist oil in the oil sump chamber passes through the first opening part, and is supplied to the crank chamber.