US6505615B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device to deoil the crankcase ventilation gases of an internal combustion engine
Assignee: Ing Walter Hengst GmbH and Co KG
•
Filing: 2002-01-29
•
Granted: 2003-01-14
•
Expires: 2022-01-29
Abstract
Abstract A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator is provided which has a gas inlet connected to a first pressure area and is directly or indirectly connected to the crankcase of the engine. The separator also has a gas outlet connected to a second pressure area and is directly or indirectly connected to the air intake section of the engine and an oil outlet connected to the oil sump of the engine. The separator further has a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area as well as at least one device which, depending on the pressure difference between the two pressure areas, opens or closes the bypass channel continuous or gradually to allow the crankcase ventilation gases to flow through. When the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by flow diversion or impact separation in the bypass channel.
Inventors
- 👤 Sieghard Pietschner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:52
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023; F01M2013/0038; F01M2013/005; F01M2013/0055; F01M13/04; F01M2013/0422; F01M2013/0427; F01M2013/0433; F01M2013/0488; F01M2013/0494
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
219 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; wherein; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area and with no filter element therein; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling in the bypass channel is brought about by at least one of flow diversion and impact separation in the bypass channel and not by means of a filter.
Claim 2
Independent Claim
219 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; wherein; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area and with no filter element therein; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling in the bypass channel is brought about by at least one of flow diversion and impact separation in the bypass channel and not by means of a filter.
Claim 3
Dependent Claim
78 words
A device according to claim 1 , wherein the device to open and close the bypass channel is a valve body charged by a pressure which, below a pre-specified opening pressure difference, is pressed into a closed position by the pressure spring against a valve seat, which is located in the bypass channel, wherein above the pre-specified opening pressure difference the valve body is raised from the valve seat against the pressure spring, thus releasing a flow gap.
Claim 4
Dependent Claim
66 words
A device according to claim 1 , wherein the device to open and close the bypass channel is a valve body which, below a pre-specified opening pressure difference, is pressed into a closed position by gravity against the valve seat located in the bypass channel, wherein above the pre-specified opening pressure difference, the valve body is raised from the valve seat, thus releasing a flow gap.
Claim 5
Dependent Claim
28 words
A device according to claim 1 , wherein the device to open and close the bypass channel is formed by a hinged throttle valve in the bypass channel.
Claim 6
Dependent Claim
23 words
A device according to claim 1 , wherein the device to open and close the bypass channel is formed by a leaf valve.
Claim 7
Dependent Claim
19 words
A device according to claim 1 , wherein the oil mist separator is in the form of a cyclone.
Claim 8
Dependent Claim
25 words
A device according to claim 1 , wherein the oil mist separator is a coalescence separator in the form of a knitted or wrap-around separator.
Claim 9
Dependent Claim
20 words
A device according to claim 1 , wherein the bypass channel is an integral component of the oil mist separator.
Claim 10
Dependent Claim
22 words
A device according to claim 6 , wherein the bypass channel and the cyclone are made in one piece from synthetic material.
Claim 11
Dependent Claim
34 words
A device according to claim 9 , wherein the gas outlets of the oil mist separator and of the bypass channel are led separately out of the crankcase in to the second pressure area.
Claim 12
Dependent Claim
32 words
A device according to claim 1 , wherein a wall of the bypass channel surrounds the device and is spaced therefrom by a gap to allow the device to open and close.
Claim 13
Dependent Claim
27 words
A device according to claim 11 , wherein the feedthrough cross section of the gap is maximally as big as the feedthrough cross section of the device.
Claim 14
Dependent Claim
41 words
A device according to claim 1 , wherein the cross sectional surface of the bypass channel in front of the device is ⅓ to ⅛ of a face of the device acted upon by the gas from the first pressure area.
Claim 15
Independent Claim
291 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; wherein; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; wherein the device to open and close the bypass channel is a valve body charged by a pressure spring, which, below a pre-specified opening pressure difference, is pressed into a closed position by the pressure spring against a valve seat, which is located in the bypass channel, wherein above the pre-specified opening pressure difference the valve body is raised from the valve seat against the pressure spring, thus releasing a flow gap; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by at least one of flow diversion and impact separation in the bypass channel; and wherein the overall length of the pressure spring can be adjusted in the differential pressureless state.
Claim 16
Independent Claim
291 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; wherein; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; wherein the device to open and close the bypass channel is a valve body charged by a pressure spring, which, below a pre-specified opening pressure difference, is pressed into a closed position by the pressure spring against a valve seat, which is located in the bypass channel, wherein above the pre-specified opening pressure difference the valve body is raised from the valve seat against the pressure spring, thus releasing a flow gap; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by at least one of flow diversion and impact separation in the bypass channel; and wherein the overall length of the pressure spring can be adjusted in the differential pressureless state.
Claim 17
Independent Claim
315 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; wherein; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; wherein the device to open and close the bypass channel is a valve body charged by a pressure spring, which, below a pre-specified opening pressure difference, is pressed into a closed position by the pressure spring against a valve seat, which is located in the bypass channel, wherein above the pre-specified opening pressure difference the valve body is raised from the valve seat against the pressure spring, thus releasing a flow gap; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by at least one of flow diversion and impact separation in the bypass channel; and wherein the end of the pressure spring that is turned away from the valve body is supported on a support element in the bypass channel, wherein the axial distance of the support element from the valve seat can be adjusted.
Claim 18
Independent Claim
315 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; wherein; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; wherein the device to open and close the bypass channel is a valve body charged by a pressure spring, which, below a pre-specified opening pressure difference, is pressed into a closed position by the pressure spring against a valve seat, which is located in the bypass channel, wherein above the pre-specified opening pressure difference the valve body is raised from the valve seat against the pressure spring, thus releasing a flow gap; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by at least one of flow diversion and impact separation in the bypass channel; and wherein the end of the pressure spring that is turned away from the valve body is supported on a support element in the bypass channel, wherein the axial distance of the support element from the valve seat can be adjusted.
Claim 19
Independent Claim
305 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; wherein; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; wherein the device to open and close the bypass channel is a valve body charged by a pressure spring, which, below a pre-specified opening pressure difference, is pressed into a closed position by the pressure spring against a valve seat, which is located in the bypass channel, wherein above the pre-specified opening pressure difference the valve body is raised from the valve seat against the pressure spring, thus releasing a flow gap; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by at least one of flow diversion and impact separation in the bypass channel; and wherein there is a lift limiter stop which determines the maximum amount by which determines the maximum amount by which the valve body can be raised from the valve seat.
Claim 20
Independent Claim
305 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; wherein; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; wherein the device to open and close the bypass channel is a valve body charged by a pressure spring, which, below a pre-specified opening pressure difference, is pressed into a closed position by the pressure spring against a valve seat, which is located in the bypass channel, wherein above the pre-specified opening pressure difference the valve body is raised from the valve seat against the pressure spring, thus releasing a flow gap; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by at least one of flow diversion and impact separation in the bypass channel; and wherein there is a lift limiter stop which determines the maximum amount by which determines the maximum amount by which the valve body can be raised from the valve seat.
Claim 21
Independent Claim
280 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; where; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area; wherein the bypass channel is an integral component of the oil mist separator; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by at least one of flow diversion and impact separation in the bypass channel; wherein the oil mist separator and the bypass channel are located, together with their respective gas inlets, in a common reception case, which is connected to the first pressure area, wherein the gas outlets of the oil mist separator and of the bypass channel are sealed against the pressure area inside the reception case, out of which they are led into the second pressure area.
Claim 22
Independent Claim
280 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; where; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area; wherein the bypass channel is an integral component of the oil mist separator; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by at least one of flow diversion and impact separation in the bypass channel; wherein the oil mist separator and the bypass channel are located, together with their respective gas inlets, in a common reception case, which is connected to the first pressure area, wherein the gas outlets of the oil mist separator and of the bypass channel are sealed against the pressure area inside the reception case, out of which they are led into the second pressure area.
Claim 23
Dependent Claim
36 words
A device according to claim 17 , wherein the as outlet of the oil mist separator and of the bypass channel are led into a sealed intermediate space, which is connected to the second pressure area.
Claim 24
Independent Claim
219 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; where; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by at least one of flow diversion and impact separation in the bypass channel; wherein the bypass channel is directly or indirectly connected to the oil sump via an oil outlet.
Claim 25
Independent Claim
219 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; where; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by at least one of flow diversion and impact separation in the bypass channel; wherein the bypass channel is directly or indirectly connected to the oil sump via an oil outlet.
Claim 26
Independent Claim
217 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; where; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by at least one of flow diversion and impact separation in the bypass channel; wherein there is an sensor, which detects whether the bypass channel is open, and which
Claim 27
Independent Claim
217 words
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has: a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; where; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling is brought about by at least one of flow diversion and impact separation in the bypass channel; wherein there is an sensor, which detects whether the bypass channel is open, and which
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-01-13 | 2006-07-15 | 2007-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-01-13 | 2010-07-15 | 2011-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-01-13 | 2014-07-15 | 2015-01-14 | $7700.00 | Window Closed / Lapsed |