DE102004045441B4 - Device for supplying a drive with liquid lubricant - Google Patents

Abstract

contraption for supplying a drive, in particular an internal combustion engine, of a vehicle, with a liquid Lubricant, in particular lubricating oil, with a removal pump trained pressure lubricant pump, which at least one first sampling point Removing lubricant from a lubricant collector, wherein the Lubricant collector is chambered formed and the first sampling point in a main chamber of the lubricant collector and at least an auxiliary chamber is formed in the lubricant collector, wherein at least one auxiliary pump driven by the lubricant, the at least one other, second sampling point lubricant takes the lubricant collector and one of the second sampling point provides spaced introduction of the lubricant collector, provided is, wherein the second sampling point in the at least one auxiliary chamber the lubricant collector is located and the discharge point in the main chamber of the lubricant collector, characterized in that the Main chamber (19) of the lubricant collector (5) as a central main chamber (19) is formed and the first extraction point (36) in the central area the plan view of the lubricant collector (5) is arranged that the at least one auxiliary chamber (20, 21) and the ...

Description

The Invention relates to a device for supplying a drive, in particular an internal combustion engine, a vehicle, with a liquid Lubricant, in particular lubricating oil, with a removal pump trained pressure lubricant pump, which at least one first sampling point Removing lubricant from a lubricant collector, wherein the Lubricant collector is chambered formed and the first sampling point in a main chamber of the lubricant collector and at least an auxiliary chamber is formed in the lubricant collector, wherein at least a powered by the lubricant auxiliary pump, the At least one other, second sampling point lubricant takes the lubricant collector and one of the second sampling point provides spaced introduction of the lubricant collector, provided is, wherein the second sampling point in the at least one auxiliary chamber the lubricant collector is located and the discharge point in the main chamber the lubricant collector is located.

current Vehicles, especially cars with sports suspension and high-performance tires (so-called road-legal semislip tires) reach longitudinally and lateral accelerations clearly> 1 G. Especially if these vehicles have a large volume Engine and have a low center of gravity, resulting in unfavorable height / width ratios the oil sump forming a lubricant collector. Usual engine oil systems with wet sump are often no longer feasible, so you increasingly on special solutions, as dry sump systems evades.

At the Use of flat oil pans, as used in vehicles with low center of gravity Need to become, especially when crossing of a certain acceleration value has the problem that the Ansaugrüssel the pressure oil pump no longer in the oil level dips. This initially increases the gas content of the pressurized oil inadmissible. For a longer time Exhausting breaks the oil pressure increasingly, resulting in various types of major engine damage can. The same problem occurs in all-terrain vehicles when For example, they drive on extreme inclines and the intake trunk due to the inclination the vehicles no longer the oil level reached.

The DE 725 831 C has a lubricating oil conveying device for internal combustion engines to the object in which separate oil collecting spaces are provided in an oil pan. A arranged in a main collection main pump pumps the oil at consumer points. Lubricating oil is supplied to the main collecting space by forepumps of the oil collecting spaces.

The DE 2 230 000 A describes a device for conveying lubricant, which has a separately arranged from a dry sump of the internal combustion engine lubricant reservoir. By means of a suction pump lubricant is conveyed from the dry sump in the lubricant reservoir. The suction pump is designed as a jet pump.

The DE 69 21 440 U concerns a chambered oil sump. It is envisaged that a baffle plate, having a plurality of openings which are each closed by a movable flap with overhead horizontal pivot axis and open or close at a tilting of the oil pan.

The US 2,938,601 shows an oil pan chambered by partitions, which provides deflectable flaps in the partitions and forms a central chamber.

The JP 2004-218 468 A shows a device for lubricating an internal combustion engine, wherein the device comprises two pressure lubricant pumps, which promote oil from an oil pan.

The DE 87 04 244 U1 describes a reciprocating or rotary piston pump that can be used for lubricating oil pump systems whose flow is maintained by means of a one- or multi-stage pressure relief valve to a constant or piecewise constant discharge pressure. An outflow throttle of the pressure relief valve is designed as an adjustable drive nozzle of an injector.

Of the Invention is based on the object, a device for supply a drive, in particular an internal combustion engine, of a vehicle, with a liquid lubricant, especially lubricating oil, specify that a reliable lubrication guaranteed even in extreme driving situations.

This object is achieved by a device having the features of claim 1. A pressurized lubricant pump designed as a removal pump conveys lubricant from the lubricant collector to at least one first removal point and supplies this lubricant to the drive for lubrication. The main pump, namely the pressure lubricant pump, removes in the central area of the outline of the lubricant collector. This can be done in particular suction, that is, the lubricant is removed by means of a suction nozzle. At least one auxiliary pump is driven by means of a lubricant volume flow. The drive is accordingly characterized the energy contained in the flowing lubricant is used to drive the auxiliary pump. For this purpose, the lubricant volume flow, in particular a proportion of this volume flow, used to drive the auxiliary pump. The auxiliary pump removes lubricant in at least one other, second sampling point lubricant in the lubricant collector and supplies this lubricant to a spaced from the second sampling point introduction point of the lubricant collector. The lubricant content of the lubricant collector is rearranged by the operation of the auxiliary pump, so that lubricant passes from one zone in the region of the second sampling point in another zone in the region of the discharge point and in this way even at extreme accelerations of the vehicle and / or at large angles of inclination of the Vehicle taken from the pressure lubricant pump, in particular sucked from their intake manifold, can be. If, for example, the vehicle is driven through an extremely long curve at high speed, so that a corresponding lateral acceleration is exerted on the lubricant content of the lubricant collector for a relatively long time, the volume of the lubricant in the lubricant collector substantially collects in the corresponding side area of the collector. The supply to the pressure lubricant pump, which sucks, for example, in the center of the lubricant collector is therefore at risk because the intake manifold is no longer immersed in the oil level. Since the auxiliary pump sucks at a sampling point other than the pressure lubricant pump (main pump) lubricant in the lubricant collector, the two sampling points fall apart locally, a certain volume of lubricant is circulated within the lubricant collector, that is, the auxiliary pump pumps lubricant from the second sampling point to the point of introduction, the second removal point is spaced from the discharge point and is thus influenced by the redistribution influence on the course of the oil level in the lubricant collector, with the result that the pressurized lubricant pump is available for removal even under the extreme conditions of the aforementioned cornering lubricant. This is especially true when the second sampling point is located in the corresponding edge region of the lubricant collector and the discharge point has a position which ensures that the first sampling point receives sufficient lubricant for removal by the main pump. Due to the drive of the auxiliary pump with a corresponding volume flow of the lubricant, a very simple and inexpensive construction can be created, which ensures a safe redistribution process of the lubricant in the lubricant collector, thereby enabling a sufficient supply of the drive of the vehicle with lubricant. Drive damage caused by tearing off the lubricant flow are therefore excluded. The invention described here is intended to significantly expand the field of application of, inter alia, cheaper wet sump systems and thus make it unnecessary to use dry sump systems in sports saloons even when using current tires. The chambers are structured in such a way that the chamber walls prevent a very rapid balancing of the lubricant levels between the individual chambers, so that this compensation process only occurs with a delay or is even prevented. This ensures that a chamber filled with lubricant in the case of acceleration or inclination does not empty too quickly or is protected against idling due to the states mentioned. The main chamber, from which the pressure lubricant pump, ie the main pump, removes, is centrally located in relation to the floor plan of the lubricant collector. At least one auxiliary chamber is provided, which cooperates with the at least one auxiliary pump. In particular, a plurality of auxiliary chambers are provided, which cooperate with a corresponding number of auxiliary pumps. An auxiliary chamber can provide a removal point for an auxiliary pump and / or a discharge point for an auxiliary pump. It is also possible to provide at least one auxiliary chamber which is not associated with an auxiliary pump or main pump. The fact that the second removal point is located in the at least one auxiliary chamber of the lubricant collector and the discharge point in the main chamber, has the result that the auxiliary pump from the auxiliary chamber takes lubricant and feeds the main chamber from which then promotes the main pump. In order to ensure that the lubricant conveyed by the auxiliary pump passes from the auxiliary chamber into the at least one main chamber, these chambers are communicatively connected to each other, at least when there is a corresponding acceleration phase and / or a tilted condition of the vehicle. The arrangement may be such that the auxiliary chamber and the main chamber are connected in a valve-like manner with each other, that is, the valve allows flows in one direction, but not in the other direction, with the result that only a corresponding exchange between the chambers can. The valve function between the main chamber and the auxiliary chamber can be effected by the provided at least one deflectable inlet flap communicating with the main chamber to communicate at least one auxiliary chamber. If this flap opens only in one direction, but in the other direction brings a closed state with it, the valve function is exercised. It can be displaced in the open position on account of inclination, geodesy, gravitation and / or acceleration in one direction, thus compensating lubricant between the auxiliary chamber and the main chamber is brought about.

Especially it is provided that the auxiliary pump one of the delivery lubricant of the pressure lubricant pump driven auxiliary pump is. Basically it is possible to To drive auxiliary pump by means of a lubricant flow, the is promoted by a designated aggregate. This aggregate let yourself easy and inexpensive realize. However, the aggregate can then be omitted, if preferred the one lubricant promotion performing pressure lubricant pump in addition to its supply the drive is used to a certain partial volume flow the auxiliary pump available which causes them to become lubricated from the second sampling point to the discharge point.

Especially it is provided that the auxiliary pump is a jet pump. jet pumps are facilities for promoting of media, especially liquids, wherein for driving a particular liquid medium is used. They perform their activity in that from a nozzle the particular liquid Medium in the form of a propulsion jet emerges at high speed, the particular liquid gets carried away from his environment and accelerates. The result of this process is a mixture of the driving and the entrained (in particular sucked) fabric. The jet pump used in the invention can be particularly simple be constructed by using a propellant jet lubricant irradiated in a mixing tube, wherein the mixing tube is a constant Cross section has. Alternatively it can be provided that the Mixing tube over the biggest part its longitudinal extent has the constant cross-section and that the end areas themselves enlarge in cross section. alternative it is also possible use a so-called diffuser tube instead of the mixing tube, that is nozzle-like to a middle zone of the pipe length rejuvenated and subsequently expanded again. This will speed up the driving and entrained substance formed mixture in the thus formed nozzle under pressure increase again lowered. In the invention, however, the preferred simplest construction of a jet pump used, that is, lubricant is by means of a nozzle irradiated in a constant in cross section mixing tube, wherein the Nozzle for corresponding end-side opening the mixing tube leaves a distance, preferably an annular opening, so that this ring opening as suction port serves.

Especially is provided that the drive of the jet pump by one of a partial flow of the funded by the pressure lubricant pump Lubricant formed driving jet takes place. The pressure lubricant pump therefore exercises a double function, on the one hand the drive with lubricant supplied and on the other hand with a partial volume flow, the auxiliary pump operates. The higher the speed of the internal combustion engine is, the greater the delivery capacity the pressure lubricant pump when the internal combustion engine with the Pressure lubricant pump is coupled. The pressure lubricant pump is preferred designed as a gear pump. Even at low speeds and therefore smaller output The pressure lubricant pump is available with appropriate design of the pump a sufficiently large one Partial volume flow for operation of the auxiliary pump available.

alternative or additionally can be provided that the pressure lubricant pump depends on the speed of the internal combustion engine and / or dependent on other parameters of the internal combustion engine and / or depending on operating parameters the vehicle has a corresponding capacity. therefore is the delivery rate the pressure lubricant pump of certain, selected parameters dependent, such an influence on the delivery of the pressure lubricant pump exercise, that in every imaginable operating condition the adequate lubricant supply the drive and, if necessary, the auxiliary pump can be operated.

Additionally or Alternatively it can be provided that the pressure lubricant pump when reaching a maximum flow rate is regulated, so that funded excess lubricant is recycled. The pressure lubricant pump delivers for example with increase the speed of the internal combustion engine a growing lubricant volume flow, which is not needed in its full size. Not needed Lubricant is considered promoted excess lubricant in the circle of support recycled. This Operation is called Abregel, but it is not to an actual Control process in the technical control sense, but one Limiting function.

A development of the invention provides that the pressure lubricant pump is a control lubricant pump. Such an embodiment of the main pump is controlled in terms of their flow rate control in terms of control technology, that is, depending on one or more parameters, the per unit time promoted lubricant volume is compared with respect to target and actual amount and corrected at control deviations. If the main pump also supplies the auxiliary pump to drive it, the control algorithm must take into account this additional amount of lubricant in order to provide the propulsion jet. If the auxiliary pump is not operated permanently, but only if it is necessary, ie temporarily, this can be included in the control algorithm flow, so that only then the volume for the propulsion jet is taken into account when an auxiliary pump operation takes place.

Especially can be provided that the auxiliary pump when pumping the pressure lubricant pump also promotes lubricant. This function is permanent, that is always when the pressure lubricant pump Lubricant is promoted at the same time the auxiliary pump operated and accordingly a propulsion jet generated in the case of a jet pump.

From Advantage is when the auxiliary pump when pumping the pressure lubricant pump dependent on from the speed of the internal combustion engine and / or in dependence from other operating parameters of the internal combustion engine and / or the vehicle promotes lubricant or in an appropriate amount promotes. The auxiliary pump delivers accordingly not permanent, that is, is not permanent in her case of training as a jet pump a propulsion jet available. Rather, there are situations in which the pressure lubricant pump for lubrication of the drive lubricant promotes, However, an operation of the auxiliary pump is not performed. Only in dependence certain parameters, namely from the speed of the internal combustion engine and / or in dependence from other operating parameters of the internal combustion engine and / or dependent on of parameters of the vehicle is lubricated by the auxiliary pump promoted. As a vehicle parameter, for example, the inclination of the vehicle across from the horizontal one be. The delivery volume flow the auxiliary pump can be constant, that is, it becomes a substantially constant propulsion jet available provided, which brings a corresponding performance with it. Alternatively, it is also possible that the propulsion jet is influenced in its volume flow, in particular dependent on the mentioned Influences, in particular parameters, so no constant output is present at the auxiliary pump, but only an appropriate amount promoted becomes.

A Development of the invention provides, by at least one operable or automatically, in particular automatic pressure dependent switching propulsion jet valve for switching the propulsion jet on and off use. If the lubricant pressure rises downstream of the Pressure lubricant pump over a certain value, so the mentioned jet fuel valve and switches gives way to the auxiliary pump to generate a propulsion jet there. The opening the propulsion jet valve is preferably carried out in dependence from the oil pressure automatically. Alternatively, it is also conceivable that the propulsion jet valve through operated a corresponding mechanism and in this way and Way the jet is switched on or off. The activity takes place in dependence selected Parameter. This may include the oil pressure, for example at a certain point of the internal combustion engine / vehicle aggregates is determined and when crossing a certain size for actuating the Treibstrahlventils leads. Drops the oil pressure again, this may be a corresponding actuation of the propulsion jet valve have as a consequence.

alternative For example, the jet fuel valve may not only have the function of "ON" and "OFF", and therefore not only fully open or closed, but have a controllable cross section, to control or regulate the volume flow of the make the propulsion jet forming lubricant. This is the delivery rate the auxiliary pump controlled or regulated.

Prefers is the second sampling point at a height level in the lubricant collector arranged, when Konstantgeradeausfahrt of the vehicle above the lubricant level is. In Konstantgeradeausfahrt the Vehicle, so if no acceleration or no appreciable Acceleration is present, the level of the lubricant level Align horizontally and as far as the pressure lubricant pump sufficiently lubricant available for removal stand. The auxiliary pump must therefore redistribute the contents of the Lubricant collector does not work. Since the extraction point of the Auxiliary pump above the height level is the lubricant level, no lubricant can be removed and promoted by the auxiliary pump become. Does it come to an acceleration state or a tilt state of the vehicle, so is the height level of the lubricant level in the lubricant collector change accordingly, so that the second sampling point lies below the lubricant level. The consequence is that the Auxiliary pump promotes lubricant and ensures that the pressure lubricant pump always sufficient lubricant promote can.

Provided an arrangement above the lubricant level of constructive Do not force can not be displayed, or does not make sense for other reasons, is provided that the second sampling point at a height level is arranged in the lubricant collector, that in Konstantgeradeausfahrt of the vehicle is below the level of the lubricant. Optimal This training with a switchable, controllable or controllable propulsion jet valve be coupled.

As already mentioned above, the lubricant pump may be formed in the extremely simple construction case as a mixing tube with a driving nozzle, wherein the mixing tube is preferably formed as cross-section over its length cross-section same tube. It is preferably provided that Enlarge the end portions of the mixing tube in cross section, in particular, are widened.

The propelling nozzle is assigned to the mixing tube end such that it lies at the height of the tube opening or a small piece protrudes into the mixing tube or a small piece in front of the Pipe opening is located. When forming a cross-sectional widening of the end region of the Mixing tube can also be provided that the motive nozzle in the Cross-sectional expansion protrudes. Always is between the nozzle and the End edge of the associated Endbereich of the mixing tube formed a free space, which is the removal opening of the second sampling point forms. About these preferably annular trained opening becomes accordingly from the Auxiliary pump removed lubricant, which is mixed with the propulsion jet mixed in the mixing tube and from the corresponding opposite Exits the end of the mixing tube and to the discharge point in the lubricant collector arrives. The corresponding discharge opening of the mixing tube is preferred the discharge point.

at a particularly simple and inexpensive construction is provided that for the formation of two alternatively operable jet pumps arranged at the two end portions of a common mixing tube driving nozzles are. The two jet pumps thus have a common mixing tube on, with both mixing pipe ends are provided with driving nozzles, but these motive nozzles not operated simultaneously, but only one drive nozzle one Drive jet drives out. Dependent on from the operation of the respective motive nozzle is carried out conveying the thus formed auxiliary pump from the one end of the mixing tube to the other end or when the other motive nozzle is in function - of the other end to the one end of the mixing tube. The exit of the propulsion jet together with the conveyed lubricant on the side where the currently not operated motive nozzle is located, No problem, since the there, preferably ring-shaped Pipe end opening the Outlet of the mixed liquid not or only slightly handicapped.

Provided very cramped space present in the lubricant collector and / or the lubricant collector due to structural features has a special shape, It may be necessary if the mixing tube between its ends at least partially arcuate runs. These Arch shape hinders the function of the jet pump or the jet pumps not or hardly.

Prefers At least two auxiliary pumps are provided, wherein the one, first Auxiliary pump, the second sampling point and the other, second auxiliary pump has a third sampling point and the second sampling point - in straight ahead of the vehicle seen in the right area and the third removal point in the left area the outline of the lubricant collector is arranged. Based on these Arrangement of the sampling points ensures that when cornering in a right turn or in a left turn due to the setting acceleration in the corresponding side areas collecting lubricant be promoted by the respective auxiliary pump can.

alternative it is also possible that at least two auxiliary pumps are provided, wherein the one, first auxiliary pump, the second sampling point and the other, second Auxiliary pump has a third sampling point and the second sampling points - in straight ahead seen from the vehicle - in the front Area and the third extraction point in the back of the floor plan the lubricant collector is arranged. In case of a strong Acceleration when driving straight ahead of the vehicle or in the case of a strong delay when driving straight ahead of the vehicle is thus ensured that the respective auxiliary pump can suck in lubricant.

Of course, it is also possible that at least four auxiliary pumps are provided, wherein the one, first auxiliary pump, the second sampling point, the second auxiliary pump, a third sampling point, the third auxiliary pump, a fourth sampling point and the fourth auxiliary pump has a fifth sampling point and the second sampling point - Seen straight ahead of the vehicle - in the right area, the third sampling point in the left area, the fourth sampling point in the front and the fifth sampling point is located in the rear of the floor plan of the lubricant collector. When cornering (right and left turns) and also during acceleration processes in straight-ahead driving or deceleration processes in straight-ahead driving and in combination situations of the states mentioned, this always ensures that at least one of the auxiliary pumps can suck in lubricant, since the corresponding lubricant level has shifted in such a way due to the acceleration values, that this auxiliary pump can promote. The same applies to inclination states of the vehicle or combinations of inclination states and acceleration states. In principle, it should be noted that, for example, only one auxiliary pump can be provided, which has a second removal point, which is at a distance from the first removal point of the pressure lubricant pump. This may be preferred, for example, when the first removal point is located in the front middle region of the outline of the lubricant collector and the second removal point lies in the rear middle region of the lubricant collector, so that For example, in a SUV - at steep mountain or steep descent always takes place from the auxiliary pump the desired circulation of the lubricant in the lubricant collector and therefore the pressure lubricant pump can promote a sufficient amount of lubricant. Here it is assumed that in cornering in the said off-road vehicle no problems with the lubricant delivery by the pressure lubricant pump occurs because, for example, the lubricant collector is relatively high, so not so flat structured.

The Invention also covers the following problem situation: By means of the auxiliary pump can be lubricant Pump from the second sampling point to the discharge point. in this connection can be the second sampling point especially in the front area the outline of the lubricant collector and / or in the rear area the outline of the lubricant collector and / or in the right area the outline of the lubricant collector and / or in the left area the outline of the lubricant collector and / or in one or lie more of the corner regions of the lubricant collector. The discharge point can preferably in the central area of the outline of the lubricant collector but also constellations are possible in which the discharge point the position of the second sampling point described above takes, but always ensures that the second Removal point spaced from the point of introduction is located. The above different positions from second sampling point and discharge point can also be in any Combination can be varied to suit the purpose an optimal solution provide.

It it can be provided that the auxiliary chamber has a first auxiliary chamber forms and that the discharge point in another, second auxiliary chamber lies. The removal of the auxiliary pump thus takes place in the first auxiliary chamber and the introduction of the auxiliary pump takes place in the discharge point, which is located in the second auxiliary chamber. Thus, the discharge point preferably not in the main chamber from which promotes the main pump. This is particularly advantageous because that in the second auxiliary chamber promoted lubricants from the second auxiliary chamber then first has to flow into the main chamber, and during this time a certain calming takes place, which is a defoaming process of the lubricant, in particular the lubricating oil, brings with it. So sucks the main pump "calmed down" lubricant, that foamed only insignificantly is. Alternatively, it is also possible which conveys the auxiliary pump into the main chamber.

Especially is provided, assigned by at least one of the auxiliary pump Lubricant sensor a control, regulation or switching function of the propulsion jet valve when lubricant from the lubricant sensor sensed or not sensed. This can be the promotion be influenced by lubricant of the auxiliary pump. Being promoted only if the driven jet valve controlled by the sensor has a corresponding propulsion jet of the associated auxiliary pump permits. Additionally or alternatively to the mentioned lubricant sensor can also be provided that, depending on parameters of the Internal combustion engine and / or the vehicle, the propellant jet valve actuated and therefore a corresponding propulsion jet of the associated auxiliary pump generated or not generated.

All in all it is advantageous if the mentioned inventive device used in a wet sump lubricant system. alternative but it is also possible the mentioned inventive device in a dry sump lubricant system use.

Prefers is the lubricant collector as an oil collector, especially as an oil pan, educated. The lubricant is therefore lubricating oil.

Further is a method for supplying a drive conceivable, in particular an internal combustion engine, a vehicle with a liquid lubricant, in particular lubricating oil is used, with the following steps: Remove from return Lubricant from a lubricant collector for lubricant supply, separation a partial volume flow of the removed lubricant, use the partial volume flow of the lubricant to operate at least one Auxiliary pump and moving lubricant in the lubricant collector by means of the auxiliary pump and feeding this lubricant or a part thereof to the supply the drive serving withdrawal point. As an auxiliary pump is in particular a Jet pump used.

Also is the use of a jet pump for supplying lubricant conceivable especially lubricating oil, to a removal point for supplying a drive, in particular an internal combustion engine, a vehicle with lubricant.

The Drawings illustrate the invention with reference to exemplary embodiments, and that shows:

1 2 a schematic cross-sectional view through a device for supplying a combustion engine of a vehicle with lubricant,

2 a plan view of the arrangement of 1 .

3 the arrangement of 1 inclination of the vehicle about its longitudinal axis,

4 a schematic view of a longitudinal section through a portion of a jet pump and

5 a longitudinal section through a jet pump assembly of another embodiment in a schematic representation.

The 1 shows a device 1 for supplying a drive, not shown, in particular an internal combustion engine, a vehicle with liquid lubricant 2 that of lubricating oil 3 is formed. As an oil pan 4 trained lubricant collector 5 has in the operation of the internal combustion engine, not shown, lubricating oil 3 with a certain height level 6 owning lubricant level 7 on. It can be seen that only the lower area of the lubricant collector 5 is filled. The lubricant level 7 is horizontally aligned and runs parallel to the ground 8th the oil pan 4 , The associated, not shown vehicle is in constant straight ahead, that is, there are no lateral accelerations. Furthermore, the vehicle rides on a flat, horizontal surface, so that there are no inclinations of the vehicle. By means of a suction nozzle 9 sucks a removal pump 10 oil 3 from the oil pan 4 , The extraction pump 10 is as a pressure lubricant pump 11 educated. The subsidized lubricating oil 3 is pressurized via an inlet pipe 12 supplied to the combus- tion engine of the vehicle for the purpose of lubrication. In the internal combustion engine, the supplied lubricating oil collects again, while it is in the oil pan 4 is returned. There is thus a lubricating oil cycle instead.

The intake trunk 9 is located - in plan view - central, ie in the middle, within the oil sump 4 , This applies both with regard to the left side L and the right side R viewed in the direction of travel of the vehicle and with respect to the front side V and rear side H in the direction of travel of the outline of the oil sump 4 ( 2 ).

The oil pan 4 has two, extending in the longitudinal direction of the vehicle partitions 13 . 14 on, according to 1 have a height that is smaller than the height of the oil pan 4 , The upper part of the oil sump 4 is formed by parts of the internal combustion engine and is in for simplicity 1 not shown.

According to 2 has every partition 13 . 14 two intake valves each 15 . 16 . 17 and 18 on, the corresponding inlet openings can open or close. By means of the two partitions 13 and 14 become a central main chamber 19 and two side auxiliary chambers 20 and 21 in the oil pan 4 educated. Out 1 it can be seen that the inlet flaps 15 to 18 only towards the center of the main chamber 19 around an upper, horizontal axis of rotation 22 can move; a pivoting of the inlet flaps 15 to 18 in the respectively associated auxiliary chamber 20 respectively 21 it is not possible to enter. The inlet flaps 15 to 18 are at a height level, which - according to 1 - below the lubricant level 7 lies. The upper edges 23 the partitions 13 and 14 are at a height level above the level of the lubricant 7 lies.

The supply pipe 12 is with two auxiliary cables 24 and 25 connected to the auxiliary pumps 26 and 27 to lead. The auxiliary pumps 26 and 27 are considered a first jet pump 28 and a second jet pump 29 educated. The two auxiliary cables 24 and 25 lead to within the jet pumps 28 and 29 arranged motive nozzles 30 and 31 in the 1 are not drawn in detail. The first jet pump 28 is a first removal opening 32 and the second jet pump 29 a second removal opening 33 assigned. Furthermore, the first jet pump 28 a first mixing tube 34 and the second jet pump 29 a second mixing tube 35 on.

The arrangement is such that the pressure lubricant pump 7 in operation via the intake manifold 9 at a first sampling point 36 oil 3 the oil pan 4 ent takes. The first sampling point 36 is below the height level 6 of the lubricant level 7 near the ground 8th inside the main chamber 19 , By means of the first removal opening 32 the first jet pump 28 becomes a second sampling point 37 for lubricating oil 3 formed, with the second sampling point 37 inside the auxiliary chamber 20 near the left side wall 38 the oil pan 4 at a height level above the level of the lubricant 7 lies. The first mixing tube 34 , that of the first jet pump 28 is assigned, leads from the auxiliary chamber 20 through or over the main chamber 19 to the auxiliary chamber 21 and forms a discharge point there 39 which forms a first discharge point. The second mixing tube 35 the second jet pump 29 leads from the auxiliary chamber 21 through the main chamber 19 through (or across) to the auxiliary chamber 20 and forms a discharge point there 40 off, which forms a second discharge point. The second removal opening 33 is located at a third sampling point 41 inside the auxiliary chamber 21 near the right side wall 42 the oil pan 4 above the lubricant level 7 ,

As already explained, the 1 and 2 the situation with unaccelerated straight ahead of the vehicle, the in the 1 light deflected positions of the inlet valves 15 and 16 The result is that due to different, the 1 non-removable oil levels of main and auxiliary chamber takes place a corresponding oil exchange. It is understandable that over the inlet flaps 15 to 18 a communicating connection from the auxiliary chamber 20 to the main chamber 19 and from the auxiliary chamber 21 to the main chamber 19 exists, for example, when the lubricant level 7 in the auxiliary chamber 20 or the auxiliary chamber 21 higher than in the main chamber 19 , Is however the lubricant level 7 inside the main chamber 19 larger than in the auxiliary chamber 20 or 21 So, because of that, the flaps 15 to 18 can not pivot in the open position and therefore no passages in the partitions 13 and 14 release, no replacement of lubricant 3 from the main chamber 19 to the auxiliary chambers 20 or 21 possible. The pivoting of the flaps 15 to 18 takes place accordingly by the geodetic height of the lubricant level 7 However, it is also influenced by lateral accelerations of the vehicle and / or by inclinations of the vehicle and / or also by gravity.

In straight ahead of the neither transversely or longitudinally accelerated vehicle on a horizontal road, the device works 1 according to the 1 and 2 follows. By means of the pressure lubricant pump 11 gets over the intake trunk 9 at the first sampling point 36 oil 3 sucked in and over the supply pipe 12 supplied to the internal combustion engine. Partial volume flows of the pressure lubricant pump 11 subsidized lubricating oil 3 get over the auxiliary lines 24 and 25 to the first jet pump 28 and the second jet pump 29 and enter as corresponding propulsion jets from the motive nozzles 30 and 31 out. As a result, the corresponding partial volume flow reaches the respective mixing tube 34 and 35 and exits the end openings 43 and 44 the mixing tubes 34 and 35 at the discharge points 39 and 40 out. Because the two removal openings 32 and 33 the two jet pumps 28 and 29 above the lubricant level 7 of the lubricating oil 3 will be located at the sampling points 37 and 41 due to the suction effect of the respective propulsion jets no lubricating oil 3 sucked. Consequently, there is no transport of lubricating oil from the auxiliary chamber 20 into the auxiliary chamber 21 and vice versa from the auxiliary chamber 21 into the auxiliary chamber 20 , By removing lubricating oil 3 from the main chamber 19 the lubricant level drops there 7 (if from the top not sufficiently lubricating oil is tracked by feedback from the internal combustion engine), so that the inlet flaps 15 to 18 open accordingly and an exchange between the two auxiliary chambers 20 . 21 and the main chamber 19 takes place.

The 3 illustrates a tilting of the vehicle about its longitudinal axis such that the right half of the vehicle is lower than the left half of the vehicle. Such a condition may exist, for example, in a SUV when off-road. It is also conceivable that it is a steep turning of a sports car, in which case the occurring lateral accelerations are initially not to be considered. It can be seen that the left auxiliary chamber 20 runs empty, that is, the existing there lubricating oil 3 runs through appropriate opening of the inlet flaps 15 and 17 in the main chamber 20 , wherein the inlet flaps 16 and 18 close, so no lubricating oil 3 on the passages of the mentioned flaps from the main chamber 19 into the auxiliary chamber 21 flows. At most it is possible - as in 3 indicated - that lubricating oil 4 over the top edge 23 the partition 14 flows and thereby into the auxiliary chamber 21 arrives. The lubricant level maintained thereby 7 in the area of the main chamber 19 is enough for the first sampling point 36 with lubricating oil 3 to supply, so that the main pump forming a pressure lubricant pump 11 sufficiently promote. Because of the removal opening 33 the second auxiliary pump 27 below the lubricant level 7 in the auxiliary chamber 21 occurs, promotes the auxiliary pump 27 oil 3 from the auxiliary chamber 21 until the final opening 44 so at the discharge point 40 oil 3 into the auxiliary chamber 20 flows and from there via the inlet flaps 15 and 17 in the main chamber 19 and therefore the pressure lubricant pump 11 is available. The other auxiliary pump 26 does not promote, because their removal opening 32 not in the lubricating oil 3 lies.

From the foregoing we clearly see that one of the 3 appropriate situation may be present even if the vehicle is not inclined about its longitudinal axis, but for example, a left turn passes through, but it is on a horizontal road, so that the device 1 the position according to 1 takes the lubricant level 7 in the three chambers 19 to 21 but approximately according to those of 3 be formed. Even then, due to the device 1 Ensure that the pressure lubricant pump 11 sufficient lubricating oil 3 promote and supply the internal combustion engine, without causing a tearing off of the lubricant flow. Of course, such overlays are conceivable, that is, acceleration processes of the vehicle in combination with tilt positions. The invention is not limited to right / left inclination of the vehicle or lateral acceleration of the vehicle, but may also include longitudinal accelerations, that is, acceleration processes when driving straight ahead and braking when driving straight ahead and downhill and uphill driving, which brin then the corresponding inclination angle Also appropriate combinations of the states mentioned are conceivable. In order, for example, to realize an uphill run without lubricant interruption, it is only necessary to provide that a jet pump from the trailing edge region R according to FIG 2 oil 3 sucks and the pressure lubricant pump 11 directly or indirectly provides. Also, in that regard, instead of the longitudinal chamber of the 2 Be provided transverse chambers. A combination of longitudinal and transverse chambers is also conceivable.

The 4 explains the structure of the jet pump 28 , which is shown here as representative of the jet pumps used for the invention. She points the motive nozzle 30 on that with the mixing tube 34 interacts. The outlet of the motive nozzle 30 lies at the height of the end edge 45 of the associated end area 46 of the mixing tube 34 , To the motive nozzle 30 around is in this way an annular space 47 to the end edge 45 formed, the removal opening 32 (Ring opening) forms.

The 5 shows an embodiment of two jet pumps 28 and 29 that is a common jet pipe 34 exhibit. The motive nozzle 30 the jet pump 28 is the one end area 46 of the mixing tube 34 assigned, the other jet nozzle 31 the jet pump 29 is the other end area 48 of the mixing tube 34 assigned. The two end areas 46 and 48 expand in the area of the two motive nozzles 30 and 31 , It becomes clear that the two jet pumps 28 and 29 alternatively have to be operated. Works the jet pump 28 , so comes out of the motive nozzle 30 a propulsion jet, the one in the zone of the end 46 Aspirates existing medium and to the end 48 promotes, where it can escape together with the propulsion jet. The same applies vice versa, when the motive nozzle 30 not operated and the motive nozzle 31 is operated so that then the corresponding propulsion jet and the medium conveyed from the end 48 to the end area 46 is encouraged. The arrangement is also in the device according to the invention 1 can be used, provided that it is ensured by appropriate switching, control or regulating means only ever a jet pump 28 respectively 29 is put into operation.

The drive of at least one auxiliary pump thus preferably takes place with a so-called propulsion jet, that is to say a partial volume flow of the lubricant conveyed by the main pump (lubricant pressure pump). Due to the use of one or more jet pumps, the overall system has no additional moving parts and is therefore robust and reliable and low in cost. Further, although a liquid jet pump has limited efficiency, there is a predominantly sufficient amount of "excess oil" available that is delivered by the pressurized lubricant pump but not used to lubricate the engine, particularly the engine. Furthermore, a trained as a jet pump auxiliary pump only requires a very small space, is easy and flexible operable. For example, it is possible to make the propulsion jet switchable or controllable or controllable with regard to its partial volume flow. For this purpose, in the auxiliary line 24 and 25 Treibstrahlventile (dashed in 1 represented and with the reference numerals 49 and 50 be provided), the pressure-dependent on and off or by means of switching devices and / or control devices and / or regulating devices are opened and closed.

According to a preferred embodiment of the invention, it is provided that when the internal combustion engine is idling, a sufficient amount of lubricant is supplied from the pressure lubricant pump 11 is encouraged. Accordingly, the components are to be interpreted as there is generally surplus pressure oil available outside of the hot run, so that in many parts of the operating range of the vehicle, this oil is deactivated unused. If, for example, the auxiliary pump or the auxiliary pumps were switched off during hot idling, the lubricant requirement of the internal combustion engine could be covered by the lubricant volume flow which is conveyed by the pressurized lubricant pump without diverting partial volume flows in order to operate the auxiliary pump or auxiliary pumps. Accordingly, the design of the pressurized lubricant pump must not be increased or only slightly increased despite the supply of the auxiliary pump or auxiliary pumps in other operating states compared to the conventional pressurized lubricant pumps, if not proceeding according to the invention. Since there is a reduction in the engine oil pressure in the middle engine speed range, there may even be a small energy saving. In particular, it is provided that when using propelling jet valves 49 . 50 Activation automatically at a switch-on pressure of 2.5 bar (relative) at the outlet of the pressure lubricant pump 11 he follows. Thus, for example, the camshaft actuators are not underserved despite acting as a consumer auxiliary pumps. The shutdown of the designed as a liquid jet pumps auxiliary pumps in hot idle, in particular by falling below said 2.5 bar, requires that the oil budget can operate at lower speeds than pure wet sump. The oil must therefore be able to flow geodetically into the main chamber to a sufficient degree. Since the problem of oil shortage typically not only increases with longitudinal and lateral accelerations, but also always with the engine speed, in lower Drehzahlbe However, if there are typically no extreme accelerations of the vehicle, the mentioned restriction of the functional range appears to be irrelevant. If the lubrication concept of the internal combustion engine in the mentioned sub-range less than 2.5 bar does not require the assistance of auxiliary pumps, the inflow of engine oil takes place in the main chamber 19 through the inlet flaps 15 to 18 , which are preferably designed as flexible flaps, in particular rubber flaps. This embodiment additionally meets the failure of one or more auxiliary pumps a fail-safe function. In addition, such a flap-supplied main chamber covers 19 both at pressures less than 2.5 bar and at pressures greater than 2.5 bar short-term dynamic peaks of acceleration, especially lateral acceleration, from.

An embodiment of a supply of a specific internal combustion engine of a vehicle provides two auxiliary pumps, which - according to the 1 - Improve the oil budget at vehicle lateral accelerations. When longitudinal acceleration of the vehicle is not to be expected with a low lubricant supply. In such a case, the two jet pumps according to embodiment of the 5 be designed because only an alternative operation is required. However, if the system is to be particularly simple in terms of its control, no alternative operation is provided, but two separate auxiliary pumps are formed, which are constantly operated in parallel, especially if the lubricant pressure downstream of the pressure lubricant pump has a value greater than 2.5 bar.

By means of a simple control, it is possible to take the jet pumps out of operation, for example, in the case of constant straight-ahead driving, in order not to constantly pump larger amounts of oil from right to left and from left to right, which could lead to foaming of the oil. Looking at this the 1 , it is clear that the two auxiliary pumps can not be active due to the lying above the lubricant level suction and therefore the not meaningful pumping is suppressed. Only the respective propulsion jet is generated, the amount of oil can be tolerated. In case of need, the "right" jet pump would quasi automatically "turn on" by the local rise of the oil level.

As according to embodiment of the 1 there is a tripartition of the oil sump, in which a main chamber 19 and two auxiliary chambers 20 and 21 are formed, if necessary (lateral acceleration) is provided that the oil is conveyed from the curve outside chamber into the main chamber. If this were done directly, oil defoaming problems could occur. However, since the subsidized by the auxiliary pump oil is not conveyed directly into the main chamber, but passes through the opposite auxiliary chamber only in the main chamber and thereby the "flap logic" of the inlet valves 15 to 18 acts, oil passes almost unhindered from the inner chamber into the main chamber, but not from the main chamber out in the outer chamber. Accordingly, the volume of the two auxiliary chambers and the main chamber for defoaming is available to the lubricating oil.

1

contraption

2

lubricant

3

oil

4

oil pan

5

lubricant collector

6

height level

7

lubricant levels

8th

ground

9

Ansaugrüssel

10

withdrawal pump

11

Pressure lubrication pump

12

feeding pipe

13

partition wall

14

partition wall

15

intake flap

16

intake flap

17

intake flap

18

intake flap

19

main chamber

20

auxiliary chamber

21

auxiliary chamber

22

axis of rotation

23

top edge

24

auxiliary line

25

auxiliary line

26

auxiliary pump

27

auxiliary pump

28

first jet pump

29

second jet pump

30

propelling nozzle

31

propelling nozzle

32

first removal opening

33

second removal opening

34

first mixing tube

35

second mixing tube

36

first sampling point

37

second sampling point

38

left Side wall

39

inlet point (first)

40

inlet point (second)

41

third sampling point

42

right Side wall

43

end opening

44

end opening

45

end edge

46

end

47

free space

48

end

49

Driving jet valve

50

Driving jet valve

Claims (28)

Apparatus for supplying a drive, in particular an internal combustion engine, of a vehicle with a liquid lubricant, in particular lubricating oil, with a pressure lubricant pump designed as a removal pump, which removes lubricant from a lubricant collector at at least one first removal point, the lubricant collector being chambered and the first removal point is located in a main chamber of the lubricant collector and at least one auxiliary chamber is formed in the lubricant collector, wherein at least one driven by the lubricant auxiliary pump, which removes lubricant from the lubricant collector at at least one other, second removal point and feeds a spaced from the second removal point introduction point of the lubricant collector provided is, wherein the second extraction point is located in the at least one auxiliary chamber of the lubricant collector and the discharge point in the main chamber of the lubricant collector, characterized in that the main chamber ( 19 ) of the lubricant collector ( 5 ) as the central main chamber ( 19 ) is formed and the first sampling point ( 36 ) in the central area of the outline of the lubricant collector ( 5 ) is arranged, that the at least one auxiliary chamber ( 20 . 21 ) and the main chamber ( 19 ) by in the lubricant collector ( 5 ) arranged partitions ( 13 . 14 ), that the at least one auxiliary chamber ( 20 . 21 ) with the main chamber ( 19 ) is communicatively connected at least in acceleration phases of the vehicle, wherein in the partitions ( 13 . 14 ) at least one deflectable, the at least one auxiliary chamber ( 20 . 21 ) with the main chamber ( 19 ) communicating inlet flap ( 15 . 16 . 17 . 18 ) is provided. Device according to claim 1, characterized in that the auxiliary pump ( 26 . 27 ) one of the delivery lubricant of the pressure lubricant pump ( 11 ) driven auxiliary pump ( 26 . 27 ). Device according to one of the preceding claims, characterized in that the auxiliary pump ( 26 . 27 ) a jet pump ( 28 . 29 ). Apparatus according to claim 3, characterized in that the drive of the jet pump ( 28 . 29 ) by one of a partial flow of the from the pressure lubricant pump ( 11 ) conveyed lubricant ( 2 ) formed propellant jet. Device according to one of the preceding claims, characterized in that the pressure lubricant pump ( 11 ) has a corresponding delivery rate as a function of the rotational speed of the internal combustion engine. Device according to one of the preceding claims, characterized in that the pressure lubricant pump ( 11 ) Depending on other operating parameters of the internal combustion engine and / or depending on operating parameters of the vehicle has a corresponding capacity. Device according to one of the preceding claims, characterized in that the pressure lubricant pump ( 11 ) is reduced when reaching a maximum flow rate, so that funded excess lubricant is recycled. Device according to one of the preceding claims, characterized in that the pressure lubricant pump ( 11 ) is a standard lubricant pump. Device according to one of the preceding claims, characterized in that the auxiliary pump ( 26 . 27 ) when pumping the pressure lubricant pump ( 11 ) also lubricants ( 2 ) promotes. Device according to one of the preceding claims, characterized in that the auxiliary pump ( 26 . 27 ) when pumping the pressure lubricant pump ( 11 ) in dependence on the rotational speed of the internal combustion engine and / or in dependence on other operating parameters of the internal combustion engine and / or the vehicle lubricant ( 2 ) promotes or promotes in an appropriate amount. Device according to one of the preceding claims, characterized by at least one actuatable or automatically, in particular automatically pressure-dependent switching Treibstrahlventil ( 49 . 50 ) for switching the propulsion jet on and off. Device according to one of the preceding claims, characterized by at least one propelling jet valve ( 49 . 50 ) for controlling or regulating the volume flow of the jet forming the propulsion jet ( 2 ). Device according to one of the preceding claims, characterized in that the second removal point ( 37 . 41 ) at a height level in the lubricant collector ( 5 ) is arranged, the constant driving of the vehicle above the lubricating middle mirror ( 7 ) lies. Device according to one of claims 1 to 12, characterized in that the second sampling point ( 37 . 41 ) at a height level in the lubricant collector ( 5 ) is arranged, which during constant travel of the vehicle below the lubricant level ( 7 ) lies. Device according to one of claims 3 to 14, characterized in that the jet pump ( 28 . 29 ) a mixing tube ( 34 . 35 ) and a motive nozzle ( 30 . 31 ) having. Apparatus according to claim 15, characterized in that the mixing tube ( 34 . 35 ) is designed as cross-sectionally equal in cross section over its length tube, wherein it is provided in particular that its end portions ( 46 . 48 ) each have a cross-sectional enlargement. Device according to one of claims 15 or 16, characterized in that the motive nozzle ( 30 . 31 ) is assigned to the mixing tube end or protrudes into the cross-sectional widening and between the drive nozzle ( 30 . 31 ) and the end edge ( 45 ) of the associated end region ( 46 . 48 ) of the mixing tube ( 34 . 35 ) free space ( 47 ) a removal opening ( 32 . 33 ) of the second sampling point ( 37 . 41 ). Device according to one of claims 15 to 17, characterized in that for the formation of two alternatively operable jet pumps ( 28 . 29 ) at the two end regions ( 46 . 48 ) of the common mixing tube ( 34 ) Motive nozzles ( 30 . 31 ) are arranged. Device according to one of claims 15 to 18, characterized in that the mixing tube ( 34 . 35 ) extends at least partially arcuately between its ends. Device according to one of the preceding claims, characterized in that at least two auxiliary pumps ( 26 . 27 ), wherein the one, first auxiliary pump ( 26 ) the second sampling point ( 37 ) and the other, second auxiliary pump ( 27 ) a third sampling point ( 41 ) and the second sampling point ( 37 ) - seen in straight ahead of the vehicle - in the right area and the third sampling point ( 41 ) in the left area of the outline of the lubricant collector ( 5 ) is arranged. Device according to one of claims 1 to 19, characterized in that at least two auxiliary pumps ( 26 . 27 ), wherein the one, first auxiliary pump ( 26 ) the second sampling point ( 37 ) and the other, second auxiliary pump ( 27 ) a third sampling point ( 41 ) and the second sampling point ( 37 ) - seen in straight ahead of the vehicle - in the front and the third sampling point ( 41 ) in the rear area of the outline of the lubricant collector ( 5 ) is arranged. Device according to one of the preceding claims, characterized in that at least four auxiliary pumps are provided, wherein the one, first auxiliary pump, the second sampling point, the second auxiliary pump, a third sampling point, the third auxiliary pump, a fourth sampling point and the fourth auxiliary pump, a fifth sampling point and the second sampling point - when viewed straight ahead of the vehicle - in the right area, the third sampling point in the left area, the fourth sampling point in the front area and the fifth sampling point in the rear area of the floor plan of the lubricant collector ( 5 ) is arranged. Device according to one of the preceding claims, characterized in that the auxiliary chamber ( 20 ) a first auxiliary chamber ( 20 ) and that the discharge point ( 39 ) in a further, second auxiliary chamber ( 21 ) lies. Device according to one of claims 11 to 23, characterized by at least one of the auxiliary pump ( 26 . 27 ) associated with the sensing of lubricant ( 2 ) causes the propulsion jet valve ( 49 . 50 ) is pressed. Device according to one of claims 11 to 24, characterized in that depending on parameters of the internal combustion engine and / or the vehicle, the propulsion jet valve ( 49 . 50 ) is pressed. Device according to one of the preceding claims, characterized by use in a wet sump lubricant system. Device according to one of claims 1 to 25, characterized by use in a dry sump lubricant system. Device according to one of the preceding claims, characterized in that the lubricant collector ( 5 ) as an oil collector, in particular as an oil pan ( 4 ), is trained.