CRANKCASE VENTILATION SYSTEM HAVING AN OIL JET PUMP WITH AN INTEGRATED CHECK VALVE

摘要

A crankcase ventilation system having a crankcase ventilation filter and a filter drain. The crankcase ventilation filter vents blow-by gases from a crankcase and separates oil from the blow-by gases. The crankcase ventilation filter drain collects oil separated by the crankcase ventilation filter and returns the separated oil to the crankcase or another component of the engine. A nozzle is coupled to a pressurized oil supply and directs an oil jet into a mixing bore of the system, which draws the oil back into recirculation. A valve is coupled to the filter drain and is configured to prevent collected oil from reentering the crankcase ventilation filter through an opening that connects the filter drain to the filter.

主权项

1. A crankcase ventilation system comprising:
a crankcase ventilation filter configured to vent blow-by gases from a crankcase; a crankcase ventilation filter drain coupled to the crankcase ventilation filter, wherein the crankcase ventilation filter drain is configured to collect oil that enters the crankcase ventilation filter and to return the collected oil to the crankcase; a pressurized oil supply; a nozzle coupled to the pressurized oil supply and configured to form an oil jet adjacent to an exit of the crankcase ventilation filter drain; and a valve coupled to the crankcase ventilation filter drain, wherein the valve is configured to prevent collected oil from entering the crankcase ventilation filter through an opening that connects the crankcase ventilation filter drain to the crankcase ventilation filter; wherein when a temperature of the pressurized oil is above a threshold temperature, the oil jet draws the collected oil out of the exit, and wherein when the temperature of the pressurized oil is below the threshold temperature, the oil jet does not draw the collected oil out of the crankcase ventilation filter drain, and oil from the pressurized oil supply backtracks into the crankcase ventilation filter drain.