US3662723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Installation for venting the crankcase of an internal combustion engine
Assignee: Daimler Benz AG
•
Filing: 1970-04-23
•
Granted: 1972-05-16
•
Expires: 1990-04-23
Abstract
Abstract An installation for venting the crankcase of an internal combustion engine in which a vent line that terminates in the crankcase, is positively closed off with respect to the atmosphere when the throttle valve in the exhaust gas line is closed, for example, during engine braking.
Inventors
- 👤 Hans-Wilhelm Buhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:39
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/0011; F01M13/022; F01M2013/026
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
127 words
An installation for venting a crankcase on an internal combustion engine of the type having air inlet means for introducing air to the engine from the atmosphere and exhaust means for exhausting gases from the engine to the atmosphere; said installation comprising exhaust valve means for operatively closing said exhaust means, vent line means connecting said crankcase to said air inlet means for venting crankcase gases thereto, closure valve means for selectively closing said vent line means with respect to the atmosphere, closure valve actuating means for operatively closing said closure valve means in response to closing of said exhaust valve means, and storage means for storing air and crankcase gases during the condition when said exhaust valve means and said closure valve means are operatively closed.
Claim 2
Dependent Claim
127 words
An installation for venting a crankcase on an internal combustion engine of the type having air inlet means for introducing air to the engine from the atmosphere and exhaust means for exhausting gases from the engine to the atmosphere; said installation comprising exhaust valve means for operatively closing said exhaust means, vent line means connecting said crankcase to said air inlet means for venting crankcase gases thereto, closure valve means for selectively closing said vent line means with respect to the atmosphere, closure valve actuating means for operatively closing said closure valve means in response to closing of said exhaust valve means, and storage means for storing air and crankcase gases during the condition when said exhaust valve means and said closure valve means are operatively closed.
Claim 3
Dependent Claim
29 words
An installation according to claim 1, characterized in that said closure valve actuating means includes a direcT mechanical linkage between said exhaust valve means and said closure valve means.
Claim 4
Dependent Claim
23 words
An installation according to claim 2, characterized in that means are provided for closing said exhaust valve means in response to engine braking.
Claim 5
Dependent Claim
16 words
An installation according to claim 1, characterized in that said storage means includes an air tank.
Claim 6
Dependent Claim
32 words
An installation according to claim 4, characterized in that said air tank means is operatively connected to the vent line means at a position between the crankcase and the closure valve means.
Claim 7
Dependent Claim
23 words
An installation according to claim 5, characterized in that the closure valve means and air tank are arranged in the an inlet means.
Claim 8
Dependent Claim
25 words
An installation according to claim 5, characterized in that said closure valve means is a throttle valve in an air suction line of the engine.
Claim 9
Dependent Claim
42 words
An installation according to claim 5, characterized in that a pipe connection in communication with the atmosphere is connected to the vent line means in parallel to the crankcase and in that a pressure limit valve is arranged in the pipe connection.
Claim 10
Dependent Claim
26 words
An installation according to claim 8, characterized in that the closure valve means and air tank are arranged in an air suction line of the engine.
Claim 11
Dependent Claim
18 words
An installation according to claim 8, characterized in that suction pump is arranged in the vent line means.
Claim 12
Dependent Claim
22 words
An installation according to claim 8, characterized in that an air filter is arranged in the pipe connection for the atmospheric air.
Claim 13
Dependent Claim
29 words
An installation according to claim 11, characterized in that the discharge end of the vent line means terminates downstream of a suction air filter in the air inlet means.
Claim 14
Dependent Claim
42 words
An installation according to claim 4, characterized in that a pipe connection in communication with the atmosphere is connected to the vent line means in parallel to the crankcase and in that a pressure limit valve is arranged in the pipe connection.
Claim 15
Dependent Claim
22 words
An installation according to claim 13, characterized in that an air filter is arranged in the pipe connection for the atmospheric air.
Claim 16
Dependent Claim
22 words
An installation according to claim 4, characterized in that said closure valve means is a three-way valve in the vent line means.
Claim 17
Dependent Claim
52 words
An installation according to claim 15, characterized in that said three-way valve includes means for connecting said vent line means directly to said air inlet means when said exhaust valve means is open and means for connecting said vent line means directly to said air tank when said exhaust valve is closed.
Claim 18
Dependent Claim
25 words
An installation according to claim 16, characterized in that pump means are provided between said crankcase and said three-way valve for pumping the crankcase gases.
Claim 19
Dependent Claim
49 words
An installation according to claim 4, characterized in that the discharge end of the vent line means terminates in a suction air line upstream of a suction air filter. 19. An installation according to claim 4, characterized in that a suction pump is arranged in the vent line means.
Claim 20
Dependent Claim
29 words
An installation according to claim 4, characterized in that the discharge end of the vent line means terminates in the suction air line upstream of a air inlet means.
Claim 21
Dependent Claim
29 words
An installation according to claim 4, characterized in that the discharge end of the vent line means terminates downstream of the inlet means filter in the air suction line.
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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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |