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Crankcase ventilation system with constant restriction in the flow direction and free flow in an opposite direction

A crankcase ventilation and crankcase technology, applied in the system field, can solve problems such as being more expensive and occupying engine space

Active Publication Date: 2021-08-17
DAYCO IP HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gate valve approach was successful, but it was more expensive, heavier and took up engine space

Method used

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  • Crankcase ventilation system with constant restriction in the flow direction and free flow in an opposite direction
  • Crankcase ventilation system with constant restriction in the flow direction and free flow in an opposite direction
  • Crankcase ventilation system with constant restriction in the flow direction and free flow in an opposite direction

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Embodiment Construction

[0031] The following detailed description will illustrate the general principles of the invention, examples of which are additionally illustrated in the accompanying drawings. In the drawings, like reference numbers indicate identical or functionally similar elements.

[0032] As used herein, "fluid" refers to any liquid, suspension, colloid, gas, plasma, or combination thereof.

[0033] As used herein, a "normally closed" check valve is in the closed position until the pressure differential (pressure change) between the inlet and outlet is sufficient to overcome the spring holding the poppet in the closed position. A "normally neutral" check valve neither opens nor closes, and depends on whether there is sufficient differential pressure to overcome the minimum mass of the poppet to be in the open or closed position, depending on the direction of flow.

[0034] figure 1 One embodiment of an engine system 100 is shown, which may be a vehicle engine system that is a turbocharg...

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PUM

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Abstract

A breach detection system for an internal combustion engine having a crankcase, an intake manifold, a positive crankcase ventilation valve, a crankcase ventilation tube with a flow control system therein, and a pressure sensor between the flow control system and the crankcase. The flow control system subdivides the crankcase ventilation tube into a plurality of parallel conduits- a first conduit having a normally closed check valve that opens under a first preselected pressure drop in a first direction from the air intake to the crankcase, and a second conduit having either a second check valve that opens under a second preselected pressure drop in a second direction opposite the first direction or a restriction profile having a third preselected pressure drop that is the same in both the first and second direction. When the pressure sensor detects no pressure drop there is a breach in the system.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 791,113, filed January 11, 2019, which is hereby incorporated by reference in its entirety. technical field [0003] This application relates to a crankcase ventilation breach detection system in which flow is continuously restricted in the normal flow direction and free flow in the opposite direction, and more particularly to a system in which adjustment orifices configured in parallel are passed port and at least one check valve to achieve the above objects. Background technique [0004] In automotive engines, the on / off operation of the ejector and / or accessories is often controlled by gate valves in which a rigid gate is placed through a conduit to prevent fluid (in this exemplary application, air) from flowing through the valve. In automatic or "command" valves, the gate is usually actuated by a solenoid and opens or closes in response to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01M1/18F01M13/00F01M13/02F01M13/04F02B77/08
CPCF01M13/0011F01M13/023F01M2013/0044F01M2013/0083F01M2250/60F02D41/22F02D2250/08F02D41/0007F01M11/10F16K15/063F16K2200/402F16K2200/201F16K2200/203F16K15/148F16K15/066F16K15/048F02B39/00F02M25/06F02M35/10222F16K17/12F16K17/36
Inventor M·C·吉尔默D·E·弗莱彻C·E·达菲尔德三世D·斯诺夫M·埃蒙德J·丹尼斯
Owner DAYCO IP HLDG