Heat exchange – With purge – or drainage – cock or plug
Patent
1987-04-17
1988-08-16
Davis, Jr., Albert W.
Heat exchange
With purge, or drainage, cock or plug
123 4114, 123 4154, 16510432, F01P 1102
Patent
active
047637242
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to a water chamber that is made of plastic for a transverse-flow radiator for internal-combustion engines of a construction having a molded-on balancing chamber with a filler neck and filling lid containing pressure control valves, wherein a venting line connects a high point of the water chamber with a water inlet and a lower-disposed junction of the venting line connects into the balancing chamber and wherein there is a connection molded on in the bottom area of the balancing chamber for an ancillary-flow return line that is separate from a radiator return flow return line that leads to the suction side of a coolant pump.
In the case of a known chamber of this construction according to DE-A No. 33 30 710, the air venting line, when the junction into the balancing chamber is located at a lower point, requires a separate element, and its fastening requires additional manufacturing expenditures. The separate emptying of the water chamber and of the balancing chamber also requires considerable servicing expenditures for the separating of both line connections, or possibly additional construction expenditures for a discharge stopper.
In the case of a known radiator of a similar construction according to DE-A No. 33 41 390, the air venting line connects the balancing chamber with a high point of the radiator in the water chamber that is located opposite the junction of the forward flow line from the engine into the radiator. The balancing chamber, in its bottom area in the direction of the water chamber that is integral with it, has an open connection to its area from which the return flow line from the radiator to the engine leads out of the water tank. This development is not very suitable for a cooling circuit for liquid-cooled internal-combustion engines having a return-flow mixing thermostat because in that case, the ancillary venting flow remains inoperative until the cooling circuit opens, and the ancillary venting flow, by the inclusion of the radiator, prolongs the warm-up time of the engine. From DE-A No. 20 44 033, a radiator of a similar construction is also known in which an air venting line, from a high point of the radiator for a low-situated U-loop serving as a hydraulic lock is connected with a high point of the balancing chamber, and at the lowest point of the venting line, a connection is arranged to a joint discharge valve for the venting line, for the balancing chamber and via a connecting opening, to the chamber for the water chamber. This text contains no suggestions with respect to a development as plastic parts that meets the requirements of manufacturing.
It is the objective of the invention to further develop a water chamber made of plastic for a transverse-flow radiator of an internal combustion engine having a molded-on balancing chamber with a filler neck and filling lid containing pressure control valves, wherein a venting line connects a high point of the water chamber with a water inlet and a lower-disposed junction of the venting line connects into the balancing chamber and wherein there is a connection molded on in the bottom area of the balancing chamber for an ancillary-flow return line that is separate from a radiator return flow return line that leads to the suction side of a coolant pump. In such a system and with low manufacturing costs, the combination with a return-flow mixing thermostat is made possible without any functional disadvantages. In that case, the warm-up time must be short, the integral molding-out of the different radiator elements must be made easier, and a simple emptying of the cooling circuit must be possible. In order to achieve this objective, the invention provides for a water chamber made of plastic and having as a result, for a short warm-up period, the ancillary venting flow in the water tank, over a short path, leading from the forward flow line into the venting line; the venting line is molded directly onto the water chamber and the balancing chamber during their molding at low ma
REFERENCES:
patent: 4449692 (1984-05-01), Rhodes
patent: 4457362 (1984-07-01), Cadars
patent: 4492267 (1985-01-01), Cadars
patent: 4592418 (1986-06-01), Cadars
Tauber Karl
Temmesfeld Axel
Bayerische Motoren Werke Aktiengesellschaft
Davis Jr. Albert W.
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