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Crankcase ventilation system with oil injection pump with integrated check valve

A crankcase ventilation and crankcase technology, applied in crankcase ventilation, lubricant pressure control, machine/engine, etc., can solve problems such as pressurized oil damage, crankcase ventilation filter oil loss, etc.

Active Publication Date: 2018-10-19
CUMMINS FILTRATION IP INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, under cold engine conditions, pressurized oil may flow into the crankcase ventilation filter drain and potentially damage the crankcase ventilation filter and or cause oil loss due to increased oil consumption

Method used

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  • Crankcase ventilation system with oil injection pump with integrated check valve
  • Crankcase ventilation system with oil injection pump with integrated check valve
  • Crankcase ventilation system with oil injection pump with integrated check valve

Examples

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Embodiment Construction

[0020] Referring generally to the drawings, embodiments disclosed herein relate to a crankcase ventilation ("CV") system having a check valve in conjunction with a pump, such as an oil injection pump. Check valves allow temporary blockage or limit the return of engine oil from the engine to the CV system during cold running conditions. When the check valve is closed (i.e. clogged oil flow back to the crankcase ventilation filter), the continuous drain function of the crankcase ventilation filter may be reduced. After the engine oil warms up to a threshold temperature, the engine oil becomes thin enough (eg, not viscous at low temperatures) to form a high velocity flow as the oil passes through the nozzles of the CV system. The high velocity flow creates the shear force needed to draw engine oil from the crankcase ventilation filter and back to the crankcase or engine. Once the required shear is generated, the check valve opens to allow normal crankcase ventilation filter disc...

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PUM

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Abstract

A crankcase ventilation system having a crankcase ventilation filter and a filter drain. The crankcase ventilation filter drains blow-by gases from the 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 other components of the engine. The nozzles are connected to a pressurized oil supply and direct a jet of oil into the system's mixing orifice, which draws the oil back for recirculation. A valve is connected to the filter drain and configured to prevent collected oil from re-entering the crankcase ventilation filter through an opening connecting the filter drain with the filter.

Description

[0001] Cross References to Related Applications [0002] This application claims the application number 61 / 962,875 filed on November 18, 2014, entitled "CRANKCASEVENTILATION SYSTEM HAVING AN OIL JET PUMP WITH AN INTEGRATED CHECK VALVE )", the entire disclosure of which is hereby incorporated by reference in its entirety for all purposes. technical field [0003] This application relates to crankcase ventilation ("CV") systems for internal combustion engines. More specifically, the present application relates to injection pumps with integrated check valves that prevent engine oil from flowing into crankcase ventilation filters of CV systems during cold engine operating conditions. Background technique [0004] During the combustion cycle of a conventional internal combustion engine, some combustion gases may leak through the cylinder's piston rings and into the crankcase. These leaking gases are commonly referred to as blow-by gases. Crankcase ventilation ("CV") systems ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01M13/00
CPCF01M1/16F01M2013/0494F01M13/04F01M13/028F01M2013/0044F01M2013/0438
Inventor C·D·帕里克B·W·施万特A·P·贾纳基拉曼A·K·科尔诗瓦
Owner CUMMINS FILTRATION IP INC