US4753214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankcase ventilation system for motor vehicles
Assignee: Dr Ing HCF Porsche AG
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Filing: 1987-06-12
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Granted: 1988-06-28
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Expires: 2007-06-12
Abstract
Abstract A crankcase ventilation system for motor vehicles comprises a main ventilation system and a safety ventilation system, in which at an air guiding housing of the intake system, connecting pieces are arranged to which the lines of the two systems are connected. So that the connection between the lines of the two systems and the air guiding housing is simplified with respect to construction and also requires little space, a joint connecting piece having connecting pipe sections for the lines of both systems is provided at the air guiding housing. Separate ducts lead away from the connecting pipe sections and extend to remotely arranged outlet openings. The outlet openings of both ducts--seen in flow direction--extend at a distance from one another.
Inventors
- 👤 Karl Langlois
- 👤 Manfred Batzill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:50
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/025; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02F; F02F7/00; F02F7/006
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
109 words
A crankcase ventilation system for motor vehicles, in which the crankcase gases are returned from the cylinder block and crankcase into an air guiding housing of an intake system of an internal-combustion engine via a main ventilation system or a safety ventilation system for accommodating blockage of the main ventilation system, comprising a main intake line connected to the main ventilation system and the crankcase, a safety intake line connected to the safety ventilation system and the crankcase in by passing relation to the main intake line, and a common connecting piece for connecting the air guiding housing with both the main intake line and the safety intake line.
Claim 2
Dependent Claim
109 words
A crankcase ventilation system for motor vehicles, in which the crankcase gases are returned from the cylinder block and crankcase into an air guiding housing of an intake system of an internal-combustion engine via a main ventilation system or a safety ventilation system for accommodating blockage of the main ventilation system, comprising a main intake line connected to the main ventilation system and the crankcase, a safety intake line connected to the safety ventilation system and the crankcase in by passing relation to the main intake line, and a common connecting piece for connecting the air guiding housing with both the main intake line and the safety intake line.
Claim 3
Dependent Claim
68 words
A crankcase ventilation system according to claim 1, wherein said common connecting piece includes respective separate ducts which lead away from connecting pipe sections for the main intake line and the safety intake line, said separate ducts extending to remotely arranged outlet openings, and wherein outlet openings of the ducts, seen in flow direction, extend at a distance to one another and lead into the air guiding housing.
Claim 4
Dependent Claim
18 words
A crankcase ventilation system according to claim 2, wherein the connecting piece is developed to be approximately Y-shaped.
Claim 5
Dependent Claim
31 words
A crankcase ventilation system according to claim 2, wherein a duct of the safety ventilation system extends as a continuation of a pertaining connecting pipe section and has a straight shape.
Claim 6
Dependent Claim
24 words
A crankcase ventilation system according to claim 2, wherein a duct of the main ventilation system surrounds a duct of the safety ventilation system.
Claim 7
Dependent Claim
30 words
A crankcase ventilation system according to claim 5, wherein the two ducts of the main ventilation system and the safety ventilation system are arranged eccentrically with respect to one another.
Claim 8
Dependent Claim
31 words
A crankcase ventilation system according to claim 5, wherein wall sections of the ducts of the main ventilation system and the safety ventilation system rest against one another along portions thereof.
Claim 9
Dependent Claim
34 words
A crankcase ventilation system according to claim 2, wherein a outlet opening of the main ventilation system, seen in flow direction, is arranged in front of an outlet opening of the safety ventilation system.
Claim 10
Dependent Claim
30 words
A crankcase ventilation system according to claim 1, wherein a duct of the main ventilation system and an assigned connecting pipe section are placed against one another at an angle.
Claim 11
Dependent Claim
30 words
A crankcase ventilation system according to claim 2, wherein a duct of the main ventilation system is developed to be closed at the side that is opposite its outlet opening.
Claim 12
Dependent Claim
32 words
A crankcase ventilation system according to claim 2, wherein the connecting piece is inserted into a pipe section of the air guiding housing and is connected with it via a locking connection.
Claim 13
Dependent Claim
36 words
A crankcase ventilation system according to claim 2, wherein a duct of the safety ventilation system, with its free end containing an outlet opening, projects with portions thereof into the interior of the air guiding housing.
Claim 14
Dependent Claim
32 words
A crankcase ventilation system according to claim 2, wherein an end of the duct containing an outlet opening is arranged outside an interior limiting wall in the area of the pipe section.
Claim 15
Dependent Claim
32 words
A crankcase ventilation system according to claim 2, wherein the air guiding housing is formed by an air guiding scoop arranged between an air mass meter and a throttle valve pipe section.
Claim 16
Dependent Claim
47 words
A crankcase ventilation system according to claim 1, wherein said common connecting piece is a unitary one-piece molded part that includes respective main intake and safety intake ducts connecting the main intake line and the safety intake line to different outlet openings in the air guiding housing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |