US3742923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-cylinder injection internal combustion engine
Assignee: Daimler Benz AG
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Filing: 1971-07-21
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Granted: 1973-07-03
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Expires: 1991-07-21
Abstract
Abstract A multi-cylinder injection-type internal combustion engine in which idling air is conducted to the cylinders in bypassing both the control valve adjusting the quantity of air in the suction manifold as also the individual suction pipes leading from the suction manifold to the individual cylinders; with the use of a by-pass vent line for venting the crankcase, which terminates in the suction line system, the by-pass vent line is connected to the idling air line system either in or upstream of the point of distribution to the individual idling air pipes connected with the individual suction pipes near the connection of the latter with the individual cylinders.
Inventors
- 👤 K Oblander
- 👤 L Fricker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:01
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/025; F02; F02M; F02M69/00; F02M69/30; F02M69/32; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
111 words
A multi-cylinder injection-type internal combustion engine with a crankcase and with a suction line system including suction manifold means, control valve means controlling the quantity of air in said suction manifold means, and individual suction pipes leading from said suction manifold means to the cylinders, idling air line means supplying idling air to the cylinders in bypassing relationship to the control valve means and the suction manifold means, characterized by vent means for venting the gases of the crankcase including by-pass line means for conducting the vent gases from said crankcase to the idling air line means and means for connecting said idling air line means with the individual suction pipes.
Claim 2
Dependent Claim
111 words
A multi-cylinder injection-type internal combustion engine with a crankcase and with a suction line system including suction manifold means, control valve means controlling the quantity of air in said suction manifold means, and individual suction pipes leading from said suction manifold means to the cylinders, idling air line means supplying idling air to the cylinders in bypassing relationship to the control valve means and the suction manifold means, characterized by vent means for venting the gases of the crankcase including by-pass line means for conducting the vent gases from said crankcase to the idling air line means and means for connecting said idling air line means with the individual suction pipes.
Claim 3
Dependent Claim
36 words
An internal combustion engine according to claim 1, characterized in that said idling air line means includes a distributor means and in that said by-pass line means is connected at least upstream of said distributor means.
Claim 4
Dependent Claim
27 words
An internal combustion engine according to claim 2, characterized in that said by-pass line means is connected to said idling air line means in said distributor means.
Claim 5
Dependent Claim
29 words
An internal combustion engine according to claim 2, characterized in that said means for connecting said idling air line means includes individual idling air lines leading to respective cylinders.
Claim 6
Dependent Claim
44 words
An internal combustion engine according to claim 1, with a distributor means connected in the idling air line means for the distribution of the enriched starting mixture to the individual cylinders, characterized in that the by-pass line means is connected with the distributor means.
Claim 7
Dependent Claim
49 words
An internal combustion engine according to claim 5, characterized in that the engine is a V-type engine with two rows of cylinders disposed with respect to each other in the form of a V, and in that the suction manifold means is disposed within the space of the V.
Claim 8
Dependent Claim
29 words
An internal combustion engine according to claim 6, characterized in that at least portions of the suction manifold means are disposed lower than portions of the individual suction pipes.
Claim 9
Dependent Claim
34 words
An internal combustion engine according to claim 7, characterized in that at least portions of said suction manifold means are disposed lower than the connections of the individual suction pipes with the respective cylinders.
Claim 10
Dependent Claim
20 words
An internal combustion engine according to claim 7, characterized in that the individual suction pipes are constructed as tuned pipes.
Claim 11
Dependent Claim
49 words
An internal combustion engine according to claim 1, characterized in that the engine is a V-type engine with two rows of cylinders disposed with respect to each other in the form of a V, and in that the suction manifold means is disposed within the space of the V.
Claim 12
Dependent Claim
29 words
An internal combustion engine according to claim 10, characterized in that at least portions of the suction manifold means are disposed lower than portions of the individual suction pipes.
Claim 13
Dependent Claim
20 words
An internal combustion engine according to claim 1, characterized in that the individual suction pipes are constructed aS tuned pipes.
Claim 14
Dependent Claim
22 words
An internal combustion engine according to claim 1, wherein said idling air line means is connected downstream of said suction manifold means.
Claim 15
Dependent Claim
27 words
An internal combustion engine according to claim 13, wherein said idling air line means is connected to said individual suction pipes in direct proximity to the cylinders.
Claim 16
Dependent Claim
32 words
An internal combustion engine according to claim 14, wherein said idling air line means includes a distributor means and said by-pass line means is connected at least upstream of said distributor means.
Claim 17
Dependent Claim
25 words
An internal combustion engine according to claim 15, wherein said by-pass line means is connected to said idling air line means in said distributor means.
Claim 18
Dependent Claim
27 words
An internal combustion engine according to claim 14, wherein said means for connecting said idling air line means includes individual idling air lines leading to respective cylinders.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |