US3757747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling water circulation for multi-cylinder internal combustion engines
Assignee: Daimler Benz AG
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Filing: 1971-11-04
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Granted: 1973-09-11
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Expires: 1991-11-04
Abstract
Abstract A cooling water circulatory system for multi-cylinder internal combustion engines in which a partial cooling water quantity is branched off from the individual cooling water spaces of the cylinders that are sequentially circumcirculated by the cooling water, and in which the partial cooling water quantities are collected after passage through the respective cylinder heads in a cooling water return line whereby the cooling water space of a downstream cylinder, as viewed in the flow direction, preferably the last cylinder, is tapped by means of a by-pass line which terminates, by-passing the cylinder heads, in the cooling water line system at a place between the suction side of the cooling water pump and the cylinder heads.
Inventors
- 👤 O Hartmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:55
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/14; F01P7/16; F01P3/00; F01P3/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
129 words
A cooling water circulatory system for multi-cylinder internal combustion engines with cooling water line system containing a cooling water pump, in which cooling water spaces are provided for respective cylinders through which the cooling water flows, in which a partial cooling water quantity is branched off from the individual cooling water spaces for cooling the associated cylinder heads and in which the partial cooling water quantities are collected after passage through these cylinder heads in a cooling water return line, characterized in that a cooling water space of a cylinder disposed downstream in the flow direction is tapped by means of a by-pass line means, and in that the by-pass line means in by-passing the cylinder heads is in communication with the suction side of the cooling water pump.
Claim 2
Dependent Claim
129 words
A cooling water circulatory system for multi-cylinder internal combustion engines with cooling water line system containing a cooling water pump, in which cooling water spaces are provided for respective cylinders through which the cooling water flows, in which a partial cooling water quantity is branched off from the individual cooling water spaces for cooling the associated cylinder heads and in which the partial cooling water quantities are collected after passage through these cylinder heads in a cooling water return line, characterized in that a cooling water space of a cylinder disposed downstream in the flow direction is tapped by means of a by-pass line means, and in that the by-pass line means in by-passing the cylinder heads is in communication with the suction side of the cooling water pump.
Claim 3
Dependent Claim
38 words
A cooling water circulatory system according to claim 1, characterized in that the by-pass line means is connected to the cooling water space of the last cylinder as viewed in the direction of flow of the cooling water.
Claim 4
Dependent Claim
35 words
A cooling water circulatory system according to claim 2, characterized in that the return line from the cylinder head includes a parallel arrangement of radiator and by-pass line controlled by a thermostatic control valve means.
Claim 5
Dependent Claim
44 words
A cooling water circulatory system according to claim 3, characterized in that the by-pass line means terminates in the line portion between the suction side of the cooling water pump and the downstream connection of the parallel arrangement consisting of radiator and by-pass line.
Claim 6
Dependent Claim
27 words
A cooling water circulatory system according to claim 3, characterized in that said by-pass line means terminates in the return line upstream of the control valve means.
Claim 7
Dependent Claim
41 words
A cooling water circulatory system according to claim 3, characterized in that said by-pass line means terminates in the return line portion upstream of the control valve means but downstream of the first return line portion from the first cylinder head.
Claim 8
Dependent Claim
35 words
A cooling water circulatory system according to claim 1, characterized in that the return line from the cylinder head includes a parallel arrangement of radiator and by-pass line controlled by a thermostatic control valve means.
Claim 9
Dependent Claim
44 words
A cooling water circulatory system according to claim 7, characterized in that the by-pass line means terminates in the line portion between the suction side of the cooling water pump and the downstream connection of the parallel arrangement consisting of radiator and by-pass line.
Claim 10
Dependent Claim
27 words
A cooling water circulatory system according to claim 7, characterized in that said by-pass line means terminates in the return line upstream of the control valve means.
Claim 11
Dependent Claim
41 words
A cooling water circulatory system according to claim 7, characterized in that said by-pass line means terminates in the return line portion upstream of the control valve means but downstream of the first return line portion from the first cylinder head.
Claim 12
Dependent Claim
126 words
A cooling fluid circulatory system for multi-cylinder internal combustion engines comprising a cooling line system including respectively an intake line means, cooling pump means disposed with the intake line means, means for cooling respective cylinders of an internal combustion engine, means for collecting a partial amount of cooling fluid from said means for cooling respective cylinders, and thermostatic control valve means associated With said means for collecting; and by-pass line means extending from said means for cooling respective cylinders associated with a respective cylinder disposed downstream in the flow direction to at least one of a place at the intake means upstream in the flow direction of the cooling pump means and a place at said means for collecting upstream of the thermostatic control valve means.
Claim 13
Dependent Claim
126 words
A cooling fluid circulatory system for multi-cylinder internal combustion engines comprising a cooling line system including respectively an intake line means, cooling pump means disposed with the intake line means, means for cooling respective cylinders of an internal combustion engine, means for collecting a partial amount of cooling fluid from said means for cooling respective cylinders, and thermostatic control valve means associated With said means for collecting; and by-pass line means extending from said means for cooling respective cylinders associated with a respective cylinder disposed downstream in the flow direction to at least one of a place at the intake means upstream in the flow direction of the cooling pump means and a place at said means for collecting upstream of the thermostatic control valve means.
Claim 14
Dependent Claim
34 words
A cooling system according to claim 11, wherein said means for cooling respective cylinders includes chamber means associated with respective cylinders, the cooling fluid passing successively between said chamber means in the flow direction.
Claim 15
Dependent Claim
29 words
A cooling system according to claim 11, wherein said means for collecting includes return line means, said return line means being connected to respective cylinders by branch line means.
Claim 16
Dependent Claim
29 words
A cooling system according to claim 11, wherein said by-pass line means is connected to the means for cooling associated with the last cylinder in the direction of flow.
Claim 17
Dependent Claim
40 words
A cooling system according to claim 11, wherein said means for collecting includes a parallel arrangement of radiator means and a second by-pass line means, said parallel arrangement disposed downstream of, and being controlled by, said thermostatic control valve means.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |