Internal-combustion engines – Lubricators – Crankcase – pressure control
Patent
1999-04-29
2000-11-21
Dolinar, Andrew M.
Internal-combustion engines
Lubricators
Crankcase, pressure control
13762427, 137463, F01M 118
Patent
active
061487880
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a valve for liquids, comprising a valve housing and a valve body which is guided in the housing.
Such a valve is known from DE-OS 36 13 093. This valve is disposed in an oil filter and serves as an outlet check valve for the clean liquid. Furthermore, an additional return check valve is provided therein for unfiltered liquid.
When an oil circuit is started up, especially in an internal combustion engine, initially there is no oil in the oil lines and in the oil containing and oil supply parts, i.e., even the oil pump is not yet filled with oil. If the oil pump is then started, it must first drive the air out of the lines against the resistance of this return check valve. This can take a fairly long time during which the internal combustion engine has no supply of oil. To avoid this disadvantage it might be desirable to fill the oil lines with oil ahead of time. This, however, takes a great amount of time.
SUMMARY OF THE INVENTION
The invention is addressed to the problem of avoiding the aforementioned disadvantages and assuring that the oil circulation starts as quickly as possible.
This problem is solved by the features of claim 1 as well as by the features of the dependent claims.
The substantial advantage of the invention is to be seen in the fact that the valve is initially in an open position. Not until the valve is unlocked does it shift to the closed position and thus produces its checking action. As a result of the open position of the valve, it is assured that the air in the system can escape very quickly, without back pressure, and that the liquid can thus flow through afterward.
According to one advantageous embodiment of the invention the pressure of the incoming liquid causes a movement of the valve body away from the locked position, so that this valve body is released and is moved into the normal position.
Another embodiment of the invention envisions that the catch means for the valve body is a projection disposed on the valve housing. A groove or slot in the valve body shaft is engaged by the projection, so that a bayonet-like catch is formed for holding the valve body in the open position. Of course, it is also possible to configure the locking means as a projection on the valve body and a slot on the valve housing.
In another advantageous embodiment, the projections are configured such that the pressure of the liquid produces a rotary movement of the valve body, such that the displacement is converted to a rotary movement by the positive guidance of the projection in a spiral path. Thus the valve body is moved out of the locked position.
An additional embodiment of the invention envisions equipping the valve body with vane-like elements. These elements serve to turn the valve body to or hold the valve body in a position which is removed from the locked position. In this way any later unintentional locking of the valve body is effectively prevented.
The valve is advantageously employed in the oil circuit for supplying oil to an internal combustion engine, and when the motor is started it is initially in the open position. As soon as oil is conveyed by the oil pump, the valve body is released from and stays out of the open position and moves into the normal operating position.
These and other features of preferred embodiments of the invention are found not only in the claims but also in the description and the drawings, it being possible for the individual features to be realized individually or together in the form of subcombinations in the embodiment of the invention and in other fields, and may constitute advantageous as well as independently patentable embodiments for which protection is hereby claimed.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be explained hereinafter in further detail with reference to working embodiments.
FIG. 1 shows a valve for liquids in a sectional view,
FIG. 1a to FIG. 1e show detail views the valve of FIG. 1 in different operating positions,
FIG. 2 shows a variant of the valve shown in FIG.
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patent: 5599003 (1997-02-01), Seemann et al.
patent: 5894825 (1999-04-01), Duerr
patent: 6047731 (2000-04-01), Conrads et al.
Brueggemann Hans
Klotz Arthur
Leipelt Rudolf
Dolinar Andrew M.
Filterwerk Mann & Hummel GmbH
Huynh Hai
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