US3921600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circulating cooling system for piston internal combustion engines
Assignee: Bayerische Motoren Werke AG
•
Filing: 1974-03-22
•
Granted: 1975-11-25
•
Expires: 1994-03-22
Abstract
Abstract A circulation cooling system for internal combustion engines with a cooling jacket and control devices which interrupt the cooling medium circulation through the cooling jacket at least within the area of the combustion zones up to a first predetermined limit value of the temperature of the engine and/or the time after the cold start of the engine, above the first predetermined limit value initially confine the circulation to a closed circulation in by-passing a radiator and under avoidance of a fresh water exchange, and above a further predetermined temperature limit include the radiator, a heater heatexchanger and/or the fresh water exchange into the cooling medium circulation; vent lines arranged between vent line connections of the radiator, of the thermostat housing, of the cooling jacket, of the cooling medium valve, and/or of an expansion tank are adapted to be closed off by at least one float valve controlled by the cooling medium level.
Inventors
- 👤 Richard Henning
- 👤 Erwin Schweiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:07
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/14; F01P7/16; F01P11/00; F01P11/02; F01P11/0285; F01P2025/00; F01P2025/08; F01P2025/50; F01P2060/00; F01P2060/08; F01P2060/10
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
186 words
A circulation cooling installation in an internal combustion engine which includes cooling jacket means and control means operable to interrupt the cooling medium circulation through the cooling jacket means at least within the area of the combustion zones up to a first predetermined limit value after the cold start of the engine, above the first predetermined limit value to confine the cooling medium circulation at first to a closed circulation by-passing a radiator means and avoiding a fresh water exchange, and above a further predetermined limit value include into the cooling medium circulation, the radiator means and at least one of the two parts consisting of heater heatexchanger means and fresh water exchange, characterized by vent line means which are arranged between vent connections of at least some of the parts consisting of radiator means, thermostat housing means, cooling jacket means, cooling valve means and an expansion tank means, said vent line means being operable to be closed off by at least one float valve means controlled by the level of the cooling medium for preventing circulation of the cooling medium through said vent line means.
Claim 2
Dependent Claim
186 words
A circulation cooling installation in an internal combustion engine which includes cooling jacket means and control means operable to interrupt the cooling medium circulation through the cooling jacket means at least within the area of the combustion zones up to a first predetermined limit value after the cold start of the engine, above the first predetermined limit value to confine the cooling medium circulation at first to a closed circulation by-passing a radiator means and avoiding a fresh water exchange, and above a further predetermined limit value include into the cooling medium circulation, the radiator means and at least one of the two parts consisting of heater heatexchanger means and fresh water exchange, characterized by vent line means which are arranged between vent connections of at least some of the parts consisting of radiator means, thermostat housing means, cooling jacket means, cooling valve means and an expansion tank means, said vent line means being operable to be closed off by at least one float valve means controlled by the level of the cooling medium for preventing circulation of the cooling medium through said vent line means.
Claim 3
Dependent Claim
20 words
An installation according to claim 1, characterized in that the first predetermined limit value is the temperature of the engine.
Claim 4
Dependent Claim
26 words
An installation according to claim 1, characterized in that the first limit value is a predetermined period of time after the cold start of the engine.
Claim 5
Dependent Claim
20 words
An installation according to claim 3, characterized in that the first predetermined limit value is the temperature of the engine.
Claim 6
Dependent Claim
48 words
An installation according to claim 1, characterized in that the vent line means are arranged between the vent connections of the radiator means, of the thermostat housing means, of the cooling jacket means, and of the cooling medium valve means as well as of the expansion tank means.
Claim 7
Dependent Claim
115 words
An installation according to claim 1, characterized in that the vent line means of the radiator means terminates uncontrolled in the thermostat housing means at a geodetic high place which is connected with the radiator means by way of a radiator return line, and in that the float valve means controls a vent conNection which discharges out of this place of the thermostat housing means, and in that further vent line means from a combining place of at least one of the two parts consisting of three-way thermostat means and cooling jacket means terminate in the float valve means in such a manner as to be operable to be closed with respect to one another.
Claim 8
Dependent Claim
37 words
An installation according to claim 6, characterized in that the further vent line means from the combining place of the three-way thermostat means as well as from the cooling jacket means terminate in the float valve means.
Claim 9
Dependent Claim
19 words
An installation according to claim 6, characterized in that the float valve means has a conically shaped valve seat.
Claim 10
Dependent Claim
26 words
An installation according to claim 8, characterized in that the vent line means terminate upstream of the valve seat surface of the conically shaped valve seat.
Claim 11
Dependent Claim
26 words
An installation according to claim 8, characterized in that the vent line means terminate downstream of the valve seat surface of the conically shaped valve seat.
Claim 12
Dependent Claim
25 words
An installation according to claim 8, characterized in that the vent line means terminate in the valve seat surface of the conically shaped valve seat.
Claim 13
Dependent Claim
26 words
An installation according to claim 11, characterized in that the vent line means terminate downstream of the valve seat surface of the conically shaped valve seat.
Claim 14
Dependent Claim
26 words
An installation according to claim 11, characterized in that the vent line means terminate upstream of the valve seat surface of the conically shaped valve seat.
Claim 15
Dependent Claim
38 words
An installation according to claim 8, characterized in that the float valve means includes a float means and a conically shaped valve body combined together with the float means into a structural part having a cylindrical guide section.
Claim 16
Dependent Claim
48 words
An installation according to claim 14, characterized in that the sections of the vent line means arranged in the thermostat housing means, the valve seat of the float valve means and the guide means of the float means are constructed as bores provided in the thermostat housing means.
Claim 17
Dependent Claim
48 words
An installation according to claim 15, characterized in that the vent line means are arranged between the vent connections of the radiator means, of the thermostat housing means, of the cooling jacket means, and of the cooling medium valve means as well as of the expansion tank means.
Claim 18
Dependent Claim
19 words
An installation according to claim 1, characterized in that the float valve means has a conically shaped valve seat.
Claim 19
Dependent Claim
26 words
An installation according to claim 17, characterized in that the vent line means terminate upstream of the valve seat surface of the conically shaped valve seat.
Claim 20
Dependent Claim
26 words
An installation according to claim 17, characterized in that the vent line means terminate downstream of the valve seat surface of the conically shaped valve seat.
Claim 21
Dependent Claim
25 words
An installation according to claim 17, characterized in that the vent line means terminate in the valve seat surface of the conically shaped valve seat.
Claim 22
Dependent Claim
26 words
An installation according to claim 20, characterized in that the vent line means terminate downstream of the valve seat surface of the conically shaped valve seat.
Claim 23
Dependent Claim
26 words
An installation according to claim 20, characterized in that the vent line means terminate upstream of the valve seat surface of the conically shaped valve seat.
Claim 24
Dependent Claim
38 words
An installation according to claim 1, characterized in that the float valve means includes a float means and a conically shaped valve body combined together with the float means into a structural part having a cylindrical guide section.
Claim 25
Dependent Claim
19 words
An installation according to claim 23, characterized in that the float valve means has a conically shaped valve seat.
Claim 26
Dependent Claim
48 words
An installation according to claim 23, characterized in that the sections of the vent line means arranged in the thermostat housing means, the valve seat of the float valve means and the guide means of the float means are constructed as bores provided in the thermostat housing means.
References Cited (Backward Citations)
US1658934A
Cited
US1674689A
Cited
US1998695A
Cited
US2706085A
Cited
US2749049A
Cited
US3162182A
Cited
US3211374A
Cited
US3499481A
Cited
US3851629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |