WO2010130576A1

WO2010130576A1 - Motor vehicle cooling device and cooling system

Info

Publication number: WO2010130576A1
Application number: PCT/EP2010/055671
Authority: WO
Inventors: Frank Kopf
Original assignee: Robert Bosch Gmbh
Priority date: 2009-05-11
Filing date: 2010-04-28
Publication date: 2010-11-18
Also published as: DE102009002998A1; CN102459837A; EP2430296A1

Abstract

The invention relates to a motor vehicle cooling device (1) for a combustion engine (3) arranged inside an engine compartment (2), comprising a heat exchanger, in particular designed as a water cooler (10), and a blower that interacts with the heat exchanger (10) in a fluid-mechanical manner, wherein the blower has a cross-flow fan (20) the fan wheel (25) whereof extends, at least in sections, in a longitudinal direction (L) along the heat exchanger (10). The invention further relates to a cooling system, in particular a water cooling system, for a combustion engine (3) of a motor vehicle, wherein the cooling system comprises a motor vehicle cooling device (1) according to the invention.

Description

description

title

Motor vehicle cooling device and cooling system

L O

The invention relates to a motor vehicle cooling device for an internal combustion engine arranged in an engine compartment. Furthermore, the invention comprises a cooling system, in particular a water cooling system, for an internal combustion engine L 5 of a motor vehicle.

State of the art

In automotive engineering, a heat exchanger of a water-cooled

> 0 internal combustion engine supplied with cooling air by an axial fan. Although an axial fan uses a flat radiator for supplying it with cooling air, the axial fan becomes more and more blocked with an increasing component density in an engine compartment of the motor vehicle, with the result that an exhaust air flow of the axial fan does not pull off sufficiently well.

5 can. As a result, the cooling capacity of the radiator decreases and must be compensated by a higher power of the axial fan, which in turn costs energy. A large blockage in the engine compartment also prevents the exhaust air flow of the axial fan can be used for cooling the engine block sides and other heat sources in the engine compartment.

30

EP 0 919 705 A2 discloses a cooling system for an internal combustion engine of a motor vehicle with a water cooler. In a downstream direction behind the radiator, this has an air guide box, which catches a part of a cooling air passing through the radiator and to laterally au-

35 provided radially outside the radiator radial fans that suck the exhaust air of the heat exchanger on the one hand within the air duct box and on the other hand to lead to the air duct box subsequent exhaust ducts, by means of which the exhaust air of the heat exchanger for the cooling of other heat sources in the engine compartment can be used. The respective radial fan is provided without overlap with respect to the water cooler and has right 5 angle away from this, so that the radial fan hinders a flow resistance through the heat exchanger as little as possible. The problem here is that an air cooling of the engine without the air duct box and the exhaust ducts is not possible.

L O task

It is an object of the invention to provide an improved automotive cooling device and an improved cooling system, in particular an improved water cooling system, for an internal combustion engine. According to the invention should

L 5 by means of a fan even with a blocked engine compartment on the one hand at least sufficient cooling air flow through the heat exchanger and on the other hand be ensured by the heat exchanger downstream in the direction of the internal combustion engine. In this case, it should be possible in particular to an exhaust air flow of the heat exchanger for further cooling tasks within the engine compartment

> 0 use.

Disclosure of the invention

The object of the invention is by means of a motor vehicle cooling device for a 5 arranged in an engine compartment internal combustion engine, according to claim

1 ; and a cooling system, in particular a water cooling system, for an internal combustion engine of a motor vehicle, according to claim 10. Advantageous developments of the invention will become apparent from the dependent claims.

The motor vehicle cooling device according to the invention or the cooling system according to the invention has a heat exchanger designed in particular as a water cooler and one or a fan or fan interacting with the heat exchanger in a fluid or gas mechanical manner. The blower or fan comprises a cross-flow fan, which can be installed in a built-in

35 stood with its extending in a longitudinal direction fan at least partially along the heat exchanger extends. Here, the blower have the cross-flow fan in addition to a Axialstromlüfter or be assigned to the heat exchanger instead of a Axialstromlüfter. In principle, a number of the cross-flow fans are arbitrary, but one, two or three cross-flow fans are preferred for a single heat exchanger.

5

According to the invention, in a parallel projection perpendicular to a flow cross-section of the heat exchanger, the longitudinal extent of the cross-flow fan or its fan wheel at least partially overlaps with the flow cross-section. Ie. a longitudinal extent of the cross-flow fan or the fan

L O rads is adjacent to one of the two major longitudinal extensions of the

Heat exchanger, wherein a distance of an elongated overlap region of fan to the heat exchanger is preferably substantially constant or changes only slightly. According to the invention, the fan of the cross-flow fan z. B. at least partially at a height of the heat exchanger to

L 5 ordered.

In embodiments of the invention, in an installed state of the motor vehicle cooling device, the cross-flow fan or its fan wheel may be outside or at least partially within a region of the flow cross-section.

> 0 section of the heat exchanger can be arranged. In this case, the region of the throughflow cross section refers to that region of space downstream of the heat exchanger which extends substantially perpendicularly away from the throughflow cross section of the heat exchanger. Here, the cross-flow fan in question is preferably at an edge region at least partially inside or outside of the

5 region of the flow cross-section of the heat exchanger and thereby preferably arranged downstream of the heat exchanger.

According to the invention, the cross-flow fan or its fan wheel can be essentially parallel to a comparatively flat extent of the heat exchanger.

30 exchangers arranged. In this case, it is preferred that the cross-flow fan or its fan wheel is arranged substantially in a vertical position or substantially lying opposite the heat exchanger, which relates to a later installation position within the engine compartment of the motor vehicle. A diagonal, angled with respect to one of the sides of the heat exchanger and / or one

35 with respect to an area of the flow cross-section inclined arrangement of

Cross-flow fan or its fan is of course applicable. In embodiments of the motor vehicle cooling device is a Luftleitgehäuse the cross-flow I üfters with the air inlet with an exhaust air region of the heat exchanger in fluid communication. By means of an air outlet of the air duct

5 ses a direct or indirect blowing, so cooling of heat sources in the engine compartment can be realized. Furthermore, the air guide housing can be designed such that a splitting of an exhaust air flow of the heat exchanger that can be flowed through the crossflow fan is realized. These resulting cooling air streams can, for. B. by means of a plurality of air outlets of Luftleitge-

L O häuses be directed to facilities or devices within the engine compartment.

For mounting the cross-flow fan relative to the heat exchanger can, for. B. a free longitudinal end portion of a fan shaft of the cross-flow fan in a Vor-

L 5 or device in the engine compartment, z. B. a frame of a Axialstromlüfters stored. In this case, it is possible to insert this free longitudinal end section into the relevant device or device; It can also be a warehouse, z. B. a ball bearing can be provided. Furthermore, it is possible, a respective end of the air guide, in particular a housing cover of the air guide

10 housings, possibly with an integrated warehouse on the pre- or institution in the

Engine room, z. B. the frame to fasten. This bearing then preferably forms a movable bearing of the fan shaft or the fan wheel.

Furthermore, the cross-flow fan preferably has a drive motor already connected to it, in particular an electric motor. Other drive motors are of course applicable; In addition, the cross-flow fan can also be driven by the internal combustion engine. The drive motor preferably has a fastening device, by means of which the cross-flow fan can be fastened opposite to its movable bearing in the engine compartment. This attachment 30 or the bearing of the fan shaft then forms a fixed bearing of the fan shaft or the fan. Preference is a screwing or caulking of the drive motor in the engine compartment.

According to the invention, instead of or in addition to a Axialstromlüfter a 35 cross-flow fan preferably on a Zargen- or a heat exchanger side in

Engine compartment attached. Exhaust air from the cross-flow fan can be direct or indirect z. B. on the edge sides of the engine compartment to heat sources, such. B. be directed laterally to the engine or an exhaust manifold. According to the invention less vortex and / or less blocking losses occur in a cooling air power, since the blocking is bypassed, which is not feasible only with a 5 Axialstromlüfter. The invention is applicable to any motor vehicle, but in particular a motor vehicle with a high blocking of an air flow from an axial flow fan and a consequent high demand for cooling air power.

L 0 In particular, according to the invention, cooling air can be passed directly to the longitudinal sides of an internal combustion engine to z. As in a longitudinally installed internal combustion engine and at the rear cylinders to achieve an additional cooling effect, which increases a lifetime of the respective internal combustion engine. Such air cooling is by means of a conventional Axialstromlüfters

L 5 not possible. By arranging the crossflow fan at / in an edge region of the heat exchanger, a cooling air flow flowing through the heat exchanger is not impeded at all or only slightly, which is advantageous, in particular, at high speeds of travel of the vehicle.

> 0 Brief description of the figures

The invention will be explained in more detail below with reference to embodiments with reference to the accompanying drawings. In the drawing show: .5

1 shows a plan view of an embodiment of a motor vehicle cooling device according to the invention in an installed state in a two-dimensional schematic illustration;

Fig. 2 is a perspective schematic side view of a cross-flow fan used according to the invention;

3 shows a perspective schematic partial view of a further embodiment of a cross-flow fan used in accordance with the invention; and FIGS. 4-7 in a respective two-dimensional schematic front view (FIG.

6) or side view (FIG. 7) each have a plurality of possible

35 Embodiments of the motor vehicle cooling device according to the invention. Embodiments of the invention

1 shows, in a broken-away plan view, a front section of a motor compartment 2 of a motor vehicle, wherein a forward direction of travel of the motor vehicle is shown with an arrow at the top in FIG. The front section shows a heat exchanger 10, in particular a water cooler 10, for a cooling device 1 of an internal combustion engine 3 of the motor vehicle, which is only partially shown. The motor vehicle cooling device 1, hereinafter referred to only as cooling device 1, cools the lines via lines not shown in the drawing

Internal combustion engine 1 with water. The cooling device 1 with lines to the engine 3 and bores z. B. within a cylinder head of the engine 3, then form a cooling system of the engine 3. Other z. B. operated with oil as a coolant cooling devices 1 are of course L 5 applicable.

In the forward direction of travel of the motor vehicle behind the heat exchanger 10 is to be cooled internal combustion engine 3, wherein passing through the heat exchanger 10 passing cooling air 14 (see arrows) on the engine s tref-

> 0 can to cool this. For an improvement of the cooling air flow 14 through the heat exchanger 10 through, located between the heat exchanger 10 and a front side of the engine 3, an axial flow fan 40, in particular when the vehicle is stationary but stationary and when driving the vehicle, if necessary cooling air 14 through the heat exchanger 10th sucks. Here-

5 through the heat exchanger receives cooling air 14, which is then used for cooling tasks within the engine compartment 2. However, with increasing blocking of the engine compartment 2, the effect of the cooling air flow 14 leaving the heat exchanger 10 evaporates, which consequently can no longer be adequately utilized. Furthermore, due to the blockage, hardly or no cooling can occur.

30 air 14 can get more into the relevant areas within the motor 2.

In order to use an exhaust air of the heat exchanger 10 for cooling of heat sources in the engine compartment 2 despite increasing clogging of the engine compartment 2, at least one cross-flow 20 or radial fan 20 is used according to the invention. This can instead (not shown in the drawing) of the axial flow 40 or in addition (see Fig. 1) to the axial flow fan 40 may be provided. An advantage of the cross-flow fan 20 is that it does not distribute the exhaust air of the heat exchanger 10 downstream distributed, but comparatively focused, which may vary depending on an outlet geometry of the cross-flow fan 20. D.

5 h. According to the invention, at least part of the exhaust air of the heat exchanger

10 sucked by the cross-flow fan 20 and discharged downstream further into the engine compartment 2. In this case, the blocking of the engine compartment 2 is bypassed, the cooling air flow 14 can be increased through the heat exchanger 10 and / or an exhaust air flow 24 of the crossflow fan 20 can be applied to a heat source.

L 0 are directed within the engine compartment 2.

If an axial-flow fan 40 is provided, then the cross-flow fan 20 is adjacent thereto, wherein a fan wheel 25 or a fan shaft 27, that is to say a longitudinal direction L of the cross-flow fan 20, is preferably substantially vertical

L 5 to a shaft 42 and propeller shaft 42 of the axial flow fan 40 is arranged.

Certain angles deviating from the right angle are z. B. analogous to Figs. 6 and 7 applicable (see below). Preferably, as shown in Fig. 1, a in the engine compartment 2 substantially vertically standing cross-flow fan 20, on a frame 41 or a frame 41 of the Axialstromlüfters 40, or laterally

> 0 or mounted on an edge of the heat exchanger 10. Substantially horizontal or obliquely arranged cross-flow fans 20 are also applicable to the cooling device 1 (see below and Figs. 4-7).

Known cross-flow fans 20 are catalog products and usually have a> 5 rectangular air duct by means of a Luftleitgehäuses 22. According to the invention to be able to respond to individual engine block shapes or individual circumstances in the engine compartment 2, it makes sense a cross 24 or cooling air flow 24 of the cross-flow fan 20 to redirect to other angles. The respective deflection angle for the cooling air flow 24 may be a variable of the application 30. Preferably, the frame 41 is used to make an aerodynamic shape at an input region of the cross-flow fan 20, which makes loss of suction of an exhaust air stream 24 of the heat exchanger 10 loss. To avoid additional components, preferably an air inlet 21 and / or an air outlet 23 of the air guide 22 are integrated into the frame 41 of the Axialstromlüfters 35 40. Fig. 1 shows approximately such an embodiment. Here, two cross-flow fans 20 are provided right and left (with reference to FIG. 1) next to the axial flow fan 40 on the frame 41, wherein the respective Luftleitgehäuse 22 is integrated with its air inlet 21 into the frame 41. The concerned

5 cross-flow fan 20 sucks in his operation from an exhaust air area 1 1 of the

Heat exchanger 10 a part of the cooling air flow 14 through the heat exchanger 10 via its air inlet 21, transports the respective cooling air stream 24 via its fan 25 through the cross-flow fan 20 through its Luftaus- outlet 23, which the cooling air flow 24 on the blocking over preferably on

L O directs a heat source in the engine compartment 2; In the present case, these are the two

An additional benefit arises when the output side of the cross-flow fan 20 or its Luftleitgehäuse 22 receives such a shape that the cooling air flow 24 is divided and two or more separate heat sources, such as points on the internal combustion engine 3,

L 5 an exhaust manifold, etc. in the engine compartment 2 can be addressed.

An attachment of the cross-flow fan 20 can in a variety of ways, eg. B. via a screw, a Verclipsung, caulking, pressing, plugging in rubber damper elements, etc. done. It is important

? 0 zugt that a fixed bearing side of the cross-flow fan 20 and a fan 25th

(Bearing 33) connected to the cross-flow fan 20 drive motor 30, in particular an electric motor 30 has. This drives the fan shaft 25 and the fan 27 and is preferably formed in a structural unit with the actual cross-flow fan 20. The drive motor 30 is thereby

> 5 set within the engine compartment 2, which is shown by way of example in FIG. 2 with the fastening means 31, 32. In this case, the fastening device 31 is a screw lug 31 and the fastening device 32 is a locking tab 32, which is formed in each case on a housing of the drive motor 30 or alternatively on a housing of the crossflow fan 20.

30

In preferred and illustrated in FIGS. 2 and 3 embodiments of the invention, a non-locating side of the fan 25 is designed as follows. Thus, it is possible to allow the fan shaft 27 to protrude at a free end of the fan wheel 25 (FIG. 2, air guide housing 22 not shown) and into a guide end.

35 insertion bushing of the frame 41. Should this be too sensitive for the bearing, it is possible to have a ball bearing on a free longitudinal end section of the To install fan shaft 27 and insert with its outer ring in the frame 41. Furthermore, it is possible to mount the free longitudinal end section of the fan shaft 27 via a bearing 26 in a housing cover 28 or the air guide housing 22, wherein the housing cover 28 or the air guide housing 22 is attached to the frame 41 or 5 another component within the engine compartment 2.

The fixed bearing side should preferably lie on one side of the drive motor 30. However, it is possible to reverse this kinematic. A secure connection of the cross-flow I üfters 20 with drive motor 30 is effected by screws. It is in

L O another embodiment, however, possible after inserting the fan shaft 27 and the fan 25 in the frame 41 or another component, the fixed bearing side z. B. by means of a sheet in the engine compartment 2 to caulk or verclipsen, the latter z. B. by means of a plastic strap on the frame 41, another component or the internal combustion engine s can be done.

L 5

4-7 each show a plurality of possible positions of the fan 25 and the cross-flow fan 20 relative to the heat exchanger 10. Here, FIGS. 4, 5 in particular embodiments in which the fan 25 parallel overlapping (overlap region 29) to a of both

> 0 longer (from three) sides of the heat exchanger 10 is arranged. It is preferred that the fan 25 is also arranged parallel to a flow cross-section 12 of the heat exchanger 10; However, this can also be carried out analogously to FIG. 7. Further, it is possible to arrange the fan 25 or the cross-flow fan 20 angled with respect to one of the sides of the heat exchanger 10,

5, which is shown by way of example in FIG. 5; In this case, in turn, the fan 25 may be arranged parallel to the flow cross section 12 or analogous to Fig. 7. Finally, Fig. 7 shows a relation to the Durchströmquerschnitt 12 inclined arrangement of the cross-flow fan 20 and the fan 25. It is of course possible, depending on a given in the engine compartment 3, which are shown in FIGS. 4-7.

30 put together embodiments.

In FIGS. 4-7, the overlap area 29 of the cross-flow fan 20 or of the fan wheel 25 with the heat exchanger 10 is shown in each case. The overlapping region 29 is a vertical parallel projection onto a side of the transverse flow fan 20 or the fan impeller 25 directly adjacent to it

Heat exchanger 10 or on the flow cross-section 12. Der Überde- Range 29 is about 25-100%, preferably 50-60%, in particular 65-75%, particularly preferably 70-85% and most preferably 90-100%. An angle between the cross-flow fan 20 or the fan wheel 25 and one side of the heat exchanger 10 (FIG. 6) and / or the flow cross-section 12 of the heat exchanger 10 (FIG. 7) is less than 60 °, preferably 35-45 °, in particular 20 -30 °, more preferably 10-15 ° and most preferably 0-5 °.

Claims

5 claims

1. Motor vehicle cooling device for an in an engine compartment (2) arranged internal combustion engine (3), with a particular as a water cooler (10) formed heat exchanger (10) and with the heat exchanger (10) idlo idheinisch cooperating blower, characterized in that the fan has a cross-flow fan (20) extending in the longitudinal direction (L) with its fan wheel (25) at least partially along the heat exchanger (10).

2. Motor vehicle cooling device according to claim 1, characterized in that the transverse flow fan (20) or the fan wheel (25) is arranged at least partially outside or within a region of a flow cross section (12) of the heat exchanger (10).

Motor vehicle cooling device according to claim 1 or 2, characterized in that at least one cross-flow fan (20) at an edge region of the heat exchanger (10) and / or downstream of the heat exchanger (10) is arranged.

4. Motor vehicle cooling device according to one of claims 1 to 3, characterized in that the fan wheel (25) is arranged substantially parallel to the heat exchanger (10), and / or can be arranged substantially vertically standing or lying substantially horizontally.

30 5. Motor vehicle cooling device according to one of claims 1 to 5, characterized in that an air inlet (21) of an air duct (22) of the cross-flow fan (20) with an exhaust air region (11) of the heat exchanger (10) is in fluid communication.

6. Motor vehicle cooling device according to one of claims 1 to 5, characterized in that by means of an air outlet (23) of the air guide housing (22) a directed blowing of heat sources in the engine compartment (2) can be realized.

5 7. Motor vehicle cooling device according to one of claims 1 to 6, characterized in that the air guide housing (22) is designed such that a dividing through the cross-flow fan (20) through exhaust air flow (24) of the heat exchanger (10) is realized , And these cooling air streams, possibly by means of at least two air outlets (23), to facilities within the engine compartment

L O (2) are directional.

8. Motor vehicle cooling device according to one of claims 1 to 8, characterized in that the fan further comprises an axial flow fan (40) and the motor vehicle cooling device (1) preferably no air guide box

L 5 has.

9. motor vehicle cooling device according to one of claims 1 to 8, characterized in that a free longitudinal end portion of a fan shaft (27) of the cross-flow fan (20) in a frame (41), in particular a frame (41) of the

> 0 Axialstromlüfters (40) can be stored, or the air guide housing (22), in particular with a housing cover (28) of the air guide housing (22), on the frame (41) can be fastened.

10. Motor vehicle cooling device according to one of claims 1 to 9, characterized 5, characterized in that the transverse flow fan (20) has a drive motor (30), in particular an electric motor (30), wherein the drive motor (30) has a fastening device (31, 32), by means of which the cross-flow fan (20) in the engine compartment (2) can be fastened.

30 1 1. Motor vehicle cooling device according to one of claims 1 to 9, characterized in that the motor vehicle cooling device (1) is arranged such that the exhaust air flow (24) of the heat exchanger (10) downstream of the air outlet (23) of the cross-flow fan (20) completely or partially on the internal combustion engine (3) is flowed past.

35

12. Cooling system, in particular water cooling system, for an internal combustion engine (3) of a motor vehicle, characterized in that the cooling system comprises a motor vehicle cooling device (1) according to one of claims 1 to 11.