• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    refrigeration circuit for liquid-cooled combustion engine. the present invention relates to a refrigeration circuit for a liquid-cooled combustion engine for motor vehicles, with a main refrigeration circuit, with a conductive advance line to a cooler and with a return line, and with a line short circuit that detects by the cooler and that, for example, can be controlled depending on the temperature and, among others, with a collateral cooling circuit coupled to a retarder of a motor vehicle braking set, which is also coupled to the main refrigeration circuit with a forward line, a return line and a control valve. to obtain a construction of favorable control technique, it is proposed that the two refrigeration circuits (2,3) are controllable as a control valve through a single rotary distribution valve (10) in whose housing (10a), with openings flow rate, the two refrigeration circuits (2,3) are so integrated into a circuit that their flow rates to the refrigerator 6 and / or to the retarder (4) can be changed in a different way predetermined or defined, especially between 0% and 100%.
    公开号:BR102012027058B1
    申请号:R102012027058-7
    申请日:2012-10-22
    公开日:2021-04-27
    发明作者:Martin Böhm
    申请人:Man Truck & Bus Ag；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a refrigeration circuit for a liquid-cooled combustion engine for motor vehicles, according to the preamble of claim 1.
    [0002] A refrigeration circuit of this type is described in document DE 103 32 907 A1 with a main refrigeration cycle for the combustion engine and a collateral refrigeration cycle for a retarder with a combustion set for the motor vehicle. The main refrigeration circuit with an integrated short circuit line to decouple the refrigeration unit in the case of the combustion engine still in a cold state is controlled by means of a thermostat valve. The heat generated in the retarder in an activated state, that is, during braking operation, will be eliminated by the main refrigeration circuit. In this case, an inversion valve is integrated in the collateral refrigeration circuit, whereby, with the retarder not activated, the collateral refrigeration circuit can be decoupled to relieve the transport pump that feeds the two refrigeration circuits.
    [0003] It is an objective of the invention to propose a refrigeration circuit of the mentioned species, which, with reduced construction resources, allows a thermal conformation and improved control of the liquid currents of the two circuits.
    [0004] According to the invention this task will be solved according to the characteristics of claim 1. Advantageous and especially convenient modalities of the invention are the subject of the dependent claims.
    [0005] According to the invention, it is proposed that the two refrigeration circuits be controlled through a single rotary distribution valve in whose housing with the flow openings both refrigeration circuits are so united that their flow rates for the refrigerator and the retarder can be changed in a predetermined or defined manner, preferably between 0 ° and 100 °. The rotary distribution valve allows a constructive and simple control technique not only to selectively decouple the refrigerator and / or the collateral circuit of the retarder, but also random intermediate positions for improved control and thermal adaptation to different service states of the engine. combustion and retarder.
    [0006] In an especially advantageous constructive version, the rotary distribution valve housing can have four flow-through openings, being integrated in the combustion engine forward line to the refrigerator, and through a third flow-through opening. passage is coupled to the short-circuit line between the advance line and return line of the main refrigeration cycle and finally the retarder return line being coupled to the fourth passage flow opening, and, in addition, the retarder advance is connected upstream of the rotary distribution valve with the advance line of the main refrigeration circuit.
    [0007] In this case, with a simple construction design of the rotary distributor, three of the flow-through openings can be arranged radially and circumferentially distributed in the rotary distribution valve housing, being controlled through a rotary distributor, for example, cross-section of the sickle, the fourth opening of the passage flow to the return line of the retarder drains axially towards the rotating distributor, being always open. This has the particular advantage that it is necessary to control only three flow openings over the rotating distributor while, with the flow flow opening permanently open, the flow resistance of the side cooling circuit is included in the control.
    [0008] In this sense, it may also be advantageous that in the advance line of the combustion engine to the cooler, upstream of the rotary distribution valve, however, downstream of the branch line of the advance line of the collateral refrigeration circuit, a throttle element is provided which ensures a minimum volume of coolant by the retarder. For example, the choke in the pipeline region of the rotary distributor may be formed by a bulkhead or by a narrowing of the cross section.
    [0009] In an especially advantageous extension of the present idea of the invention, a transport set is coupled to the main refrigeration circuit, especially a transport pump, and the transport set is preferably provided for the potential co-regulation in the main refrigeration circuit. and / or temporarily, depending on the switching of the rotary distribution valve, it can be operated with a greater or lesser transport potential. In this case, for example, the transport set may be formed by an electrically regulated transport pump or alternatively, it may be formed by a mechanical transport pump coupled, by means of a coupling set, such as, for example, a belt drive and, in the combustion engine, being thus linked with its "speeds". With this last unit, the transport potential can again be controlled by means of a control set, and as a control set it can serve, for example, a coupling set, such as, for example, a magnetic coupling or a so-called visco coupling. to name just a few examples. Alternatively or additionally, the control set can also be formed by an arrangement of adjustable conductive paddles. With a structure of this nature, the potential for driving the transport pump (with unchanged conveyor potential) with the retarder decoupled on the rotating distribution valve and / or with the main refrigeration circuit operated in a short circuit (without flow of passage through the cooler) can be significantly reduced and therefore drive energy for the combustion engine can be saved.
    [00010] The rotary distribution valve, that is, the rotary distributor, can preferably be regulated electrically by means of a gradual engine, with the service temperatures of the refrigeration circuits, the load states of the combustion engine and the operation of the motor vehicle service brake are recorded and according to this data, the rotating distributor and eventually the transport potential of the transport pump will be readjusted. The gradual motor can preferably readjust the rotating distributor in the two directions of rotation, thus controlling different switching sequences.
    [00011] In addition, to achieve a safe circuit, the rotary distribution valve can be equipped with at least one position sensor, for example, a rotary angle sensor and its function can be electronically controlled in a feedback control. In the event of a verified erroneous function, a warning signal can then be generated and / or a rotating distributor safety position can be activated (for example, both refrigeration circuits would be opened, greater potential of the transport pump, etc. ).
    [00012] In addition, in a heating function for the combustion engine (for example, in the case of extremely low external temperatures and / or for a comfortable cold travel behavior and / or for the quick response of a coupled internal heating in the main refrigeration circuit) the retarder can be activated and its collateral refrigeration circuit can be temporarily coupled to the main refrigeration circuit operating in a short-circuit regime, this coupling being made through the rotary distribution valve. This procedure results in a double effect by heating the retarder on the one hand, whose braking service, however on the other hand, produces a greater potential for the combustion engine to start, linked to an increased temporary fuel passage and faster heating of the combustion engine. combustion.
    [00013] The rotary distributor of the rotary distribution valve may be elastically prestressed in a predetermined position, in which both the main refrigeration circuit as well as the collateral refrigeration circuits are technically joined in the flow with the main refrigerant circuit cooler. In this way, it is advantageously ensured that in the event of a failure of the electrical activation of the rotary distributor, the combustion engine and retarder cooling is protected. The prestressing can, for example, be done by flank springs acting in the circumferential direction near the rotating distributor and in the housing itself.
    [00014] Finally, in a compact and favorable weight construction, the rotary distributor valve and the transport pump of the main refrigeration circuit can be integrated in a common housing.
    [00015] In addition, a process sequencing for a refrigeration circuit of this type according to the invention is claimed, with which the above-mentioned advantages result.
    [00016] An example of carrying out the invention is explained in more detail below, based on an attached schematic drawing. The figures show: figure 1 - simplified block diagram showing a cooling circuit for a combustion engine in motor vehicles with a main cooling circuit and a collateral cooling circuit for a retarder as a motor vehicle braking assembly and with a valve electrically activated rotary distribution valve to control the two refrigeration circuits and figures 2 to 9 show a section through the rotary distribution valve housing with eight possible positions of the rotary distributor to control the main and collateral refrigeration circuit.
    [00017] Figure 1 shows, in a superficial schematic way, the refrigeration circuit of a liquid-cooled combustion engine 1 and intended for motor vehicles, with a main refrigeration circuit 2 and a collateral refrigeration circuit 3 for a retarder 4 only indicated for another brake set (permanent brake) not shown on the motor vehicle.
    [00018] The main refrigeration circuit 2 consists essentially of a forward line 5 from the combustion engine 1 to an air-water exchanger, that is, a cooler 6 and a return line 7 from the cooler 6 to the combustion engine. combustion 1. On the return line 7, a transport pump 8 with transport potential that can be controlled in a variety of ways is arranged.
    [00019] Between the forward line 5 and the return line 6 downstream of the transport pump 8, a short-circuit line 9 is integrated and can be controlled via a gradual electric motor (not shown), which can be controlled via a rotary distribution valve 10 of an electric gradual motor (not shown).
    [00020] The main refrigeration circuit 2 is only shown to the extent that this is necessary for the understanding of the present invention. Other refrigeration circuit couplings, such as, for example, a heating compartment inside the motor vehicle, etc., are not designed.
    [00021] The collateral cooling circuit 3 for cooling the retarder 4 (for example, through a heat exchanger or through direct subjection) also features a feed line of this type 11 and a return line 12.
    [00022] The feed line 11 is coupled upstream of the rotary distribution valve 10 in a segment 5a of the feed line 5 of the main refrigeration circuit 2, between the point where the two feed lines 5a, 11 and of the rotary distribution valve 10, a choke assembly 3 (for example, a defined narrowing) may be provided in the feed line 5a.
    [00023] The transport pump 8 and the gradual motor of the rotary distribution valve 10 are controlled by means of an electronic control device 14 (indicated in broken lines) which produces the variable potential of the transport pump 8, for example, by change of speed or volumetric flow and the position of the rotary distribution valve 10 for the switching positions that are yet to be described. The control device 14 may also optionally activate an electric cooling fan 16 in the refrigerator 6.
    [00024] For this purpose, the control unit 14 will be captured and technically processed for regulation by parts of temperature sensors T (not shown), for example, in the feed lines 5, 12, of load states L of the motor combustion (eg drive or thrust operation), operating state R of retarder 4 etc.
    [00025] Figures 2 to 9 show a section through the housing 10a of the rotary distribution valve 10 on which rotatable rotary distributors 10b are mounted. The rotary distributor 10b, sealed to the outside, through the gradual motor can be adjusted to the positions described below, for example, from degree 0 (figure 2) to 315 ° (figure 9).
    [00026] As can be seen, in housing 10a there are three coupling sleeves radially branched and out of phase by the circumference that establish limits in the pass filter openings and which are more or less blocked or released by the rotary distributor 10b. The coupling sleeve contains the segment 5a (indicated with arrows) of the feed line 5, the feed conductor segment 5b and the short-circuit line 9.
    [00027] Another coupling sleeve 15 of the return line 12 is coaxially aligned in the direction of the rotation axis of the rotary distributor 10b, the opening of which is always open, that is, according to the position of the cursor rotating, it is joined with one or two of the other three through-flow openings.
    [00028] In the 0 degree starting position of the rotary distributor 10b (figure 2), the flow-through openings of the feed segment 5a of the feed line 5 and the short-circuit line 9 are fully open.
    [00029] The flow-through opening of the forward conductive segment 5b is closed. This position corresponds to a cold start of the combustion engine 1.
    [00030] In this switching position, coolant will be transferred from the combustion engine 1 over the short circuit line 9, the transport pump 8 and the remaining segment of the return line 7, again to the combustion engine 1. O refrigerator 6 is decoupled and therefore will not be crossed by the flow.
    [00031] The collateral refrigeration circuit 3 with the retarder 4 is also decoupled, due to its greater resistance to the flow of passage, and the throttle point 13 may be adjusted, eventually, to a reduced minimum passage.
    [00032] The division of the coolant passage is, for example, as follows: Cooler 6 - 0 °% Short-circuit line - 9 - 100% Retardant - 4 - 0%
    [00033] The potential of the transport pump 8 is reduced or even switched off for a short period of time.
    [00034] Figure 3 shows the switching position of the rotary distributor 10b with increasing heating of the combustion engine 1, in which the through flow opening of the forward conductive segment 5a is fully open and the through flow openings of the segment advance feed 5b and short-circuit line 9 are partially open and therefore the cooler 6 is connected with a portion of about 50% in the coolant churn. The retarder 4 continues as before completely decoupled due to the increased flow resistance of the collateral cooling circuit 3.
    [00035] As soon as the combustion engine 1 has reached its operating temperature, the rotary distributor 10b will be moved by the gradual engine to the switching position shown in figure 4, in which the short-circuit line 9 is closed and the segment from the feed line 5b to the refrigerator 6, as well as the feed line 5a segment from the feed line 5, are fully open. Due to the reasons mentioned above, retarder 4 remains uncoupled. Eventually, the potential of the transport pump 8 may already be higher.
    [00036] In figure 5, the rotary distributor 10b is moved to a position in which the through-flow opening for the forward line segment 5b remains fully open, but the through-flow opening of the forward line segment 5a it is partially closed by the control. Eventually, the potential of the transport pump 8 will be higher.
    [00037] This causes the transport pump 8 to suck up coolant, that is, refrigerant, both through the forward line segment 5b of the main refrigeration circuit 2, as well as through the advance line 11 of the collateral cooling circuit 3 , that is, both circuits 1 and 2 are coupled. This may be the case, for example, with the retarder 4 in braking operation and in the case of the relatively hot combustion engine 1.
    [00038] In the switching position of the rotary distributor 10b according to figure 6, the throughflow opening of the short circuit circuit 9 remains closed and also the coupling of the forward line segment 5a of the forward line 5 is closed. The transport pump 8 is switched to full potential.
    [00039] Consequently, both refrigeration circuits 2 and 3 are fully coupled to the working volume of the coolant, that is, the refrigerator, that is, they are switched to full cooling potential. The coolant current flows over the forward line segment 5a through the forward line 5, through the forward line 11, through the retarder 4, through the return line 12, through the forward line segment 5b of the main refrigeration circuit, by refrigerator 6, and so on.
    [00040] If, for example, with a longer push phase of the motor vehicle with the combustion engine 1 not activated, its temperature T decreases, then the rotary distributor 10b can be commanded to a switching position according to figure 7, in which the segment of the advance line 5a remains closed, but the flow opening for the short-circuit line 9 is partially open. As a result, with the flow through the retarder 4 still integral, the flow through the combustion engine 1 is reduced.
    [00041] However, with a longer push phase, with possibly additional cooling of the combustion engine 1, this state, according to figure 8, can be increased in such a way that with closed flow openings of the segment of the advance line 5a and of the segments of the advance line 5b, as well as in the case of the open passage flow opening of the short-circuit line, the retarder 4 continues to be completely crossed by the flow, with the passage of the liquid being verified coolant on the advance line 11 of the collateral cooling circuit 3, on the retarder 4, on its return line 12, on the short-circuit line 9, on the transport pump 8 and on the return line 7 upstream. In this way, the retarder 4 additionally produces a heating or temperature stabilization of the combustion engine 1, while the cooler 6 is decoupled.
    [00042] Finally, in the switching position of the rotary distributor 10b according to figure 1, the throughflow opening of the short-circuit line 9 remains fully open and that in the forward line segment 5b remains fully closed, while that the throughflow opening of the forward line segment 5a of the forward line 5b is partially open. In this way, the cooling potential for retarder 4 will be reduced, and eventually the potential of the transport pump 8 may also be reduced.
    [00043] The rotary distribution valve 10 is not restricted to the example shown.
    [00044] Thus, instead of a gradual motor adjustable in the two directions of rotation, mechanical, pneumatic, hydraulic or magnetic electrical activation may also be provided.
    [00045] Through elastic means (for example, flank springs), the rotary distributor 10b may be prestressed in a switching position, for example, according to figure 6 that moves this unit - in the event of an activation failure electrical - automatically to this position and keeps the unit at that point. It is thus ensured that both refrigeration circuits 2, 3 are operational, that is to say, that they cannot present unacceptable overheating.
    [00046] In addition, the rotary distribution valve 10 can be equipped with at least one position sensor, for example, a rotary angle sensor (not shown) that is coupled to the control device 14 and therefore is electronically protected the function of the rotary distributor 10b in a feedback command.
    [00047] In addition to the described functions of the rotary distributor valve 10, in a heating function for the combustion engine 1, the retarder 4 may be activated and its collateral cooling circuit 3 may temporarily, through the rotary distribution valve 10, it is coupled to the main refrigeration circuit 2 in a short circuit (switching position of rotary distributor 10b according to figure a). The essential difference in the case is that the combustion engine 1 is operating and in order to overcome the activated braking potential it will have to be activated, it will have to be operated with a higher load. This represents a particularly effective heating phase for the combustion engine 1.
    [00048] Eventually, the transport pump 8 and the rotary distribution valve 10 can be integrated into a common housing with an integrated short-circuit line 9, the construction resources will be reduced and a particularly compact construction will have been created. advantageous mounting.
    [00049] In addition to the switching positions shown for rotary distributor 10b according to figures 2 to 9, other intermediate positions of rotary distributor 10b can also be accessed continuously via the gradual motor, and this can occur in both directions of rotation with switching sequences varied from the above description. Numerical ratio of components 1 - combustion engine (BKM). 2 - main refrigeration circuit. 3 - collateral cooling circuit. 4 - retardant. 5 - BKM advance line (1 to refrigerator 6). 5a - segment of the advance line from BKM (1) to the rotary distribution valve 10. 5b - segment of the advance line (from the rotary distribution valve 10 to the refrigerator 6). 6 - refrigerator. 7 - refrigerator return line 6. 8 - transport pump. 9 - short circuit line from rotary distribution valve 10 to transport pump 8. 10 - rotary distributor valve. 10th - accommodation. 10b - rotating distributor. 11 - advance line from BKM 1 to retarder 4. 12 - return line from retarder 4 to rotary distributor valve 10. 13 - choke element. 14 - control device. 15 - coupling sleeve. 16 - cooling fan.
    权利要求:
    Claims (9)
    [0001]
    1. Motor vehicle with a liquid-cooled combustion engine (1), with a retarder (4) from a motor vehicle braking assembly, and with a refrigeration circuit, in which the refrigeration circuit has a main refrigeration circuit (2) with an advance line (5) leading to a refrigerator (6), especially a refrigerator (6) formed by an air-water heat exchanger, with a return line (7) that moves away from the refrigerator ( 6), and with a short circuit line (9) that forms a deviation around the refrigerator (6) and that can be controlled depending on predetermined parameters, for example, depending on temperature, as well as having at least one collateral cooling circuit (3) which couples the retarder (4) and which has a forward line (11) and a return line (12) and which is also coupled by means of a control valve to the main refrigeration circuit ( 2), characterized by the fact that the two refrigeration circuits ions (2, 3) can be controlled by means of a single rotation distributor valve (10) as a control valve, in whose housing (10a), with through-flow openings, the refrigeration circuits (2, 3) are so joined that their flow rates for the cooler (6) and the retarder (4) can be changed in a defined way, especially between 0% and 100%, in which the housing (10a) of the distributor valve rotation (10) has four flow-through openings, being integrated in the advance line (5) of the combustion engine (1) in the direction of the refrigerator (6), and, through a third flow-through opening, the short-circuit line (9) is coupled between the advance line (5) and the return line (7), and where the return line (12) of the retarder (4) is coupled in the fourth flow opening passage (15), the advance line (11) of the retarder (4) being connected upstream of the distribution valve chain rotary position (10) with the advance line (5a) of the main refrigeration circuit (2) and three of the through-flow openings are distributed in a radial direction next to the housing (10a) of the rotational distribution valve (10), in accordance with preferably in a common plane and / or distributed in the circumferential direction, and can be controlled through a rotational distributor (10b), preferably a rotational distributor (10b) with a phage-shaped cross section, and in which the fourth passage flow opening (15 ) for the return line (12) of the retarder (4) flows out axially in the direction of the rotational distributor (10b), being permanently open; and, in the advance line (5) of the combustion engine (1) to the cooler (6), upstream of the rotational distribution valve (10), but downstream of the branch of the advance line (11) of the refrigeration circuit collateral (3), a choke element (13) is provided, shaped in such a way as to ensure a minimum refrigerant flow through the retarder (4).
    [0002]
    2. Motor vehicle according to claim 1, characterized by the fact that the transport set (8), especially a transport pump (8) is incorporated into the main refrigeration circuit (2), with preference being given to the set of transport (8) in the main refrigeration circuit (2) the potential co-regulation is conformed and / or can be operated temporarily with a greater or lesser transport potential (10).
    [0003]
    3. Motor vehicle according to claim 2, characterized by the fact that the transport set is formed by an electrically regulated transport pump, or that the transport set is alternatively formed by a coupled mechanical transport pump, by means of of a coupling assembly, especially by means of a drive belt, the transport potential of which can be controlled through an adjustment assembly, especially in the form of a coupling assembly and / or in the form of an adjustable conductive paddle arrangement.
    [0004]
    4. Motor vehicle according to claim 2 or 3, characterized by the fact that the transport potential of the transport set (8), relative to an unaltered transport potential, with the retarder (4) decoupled through the distribution valve rotational (10) and / or with the main refrigeration circuit (3) operated in short-circuit, is reduced.
    [0005]
    5. Motor vehicle according to any one of the preceding claims, characterized by the fact that the rotational distribution valve (10) by means of auxiliary energy, can be regulated, especially electrically and / or pneumatically and / or hydraulically and / or magnetic, for example, by means of a gradual engine, the operating temperature (T) of the refrigeration circuits (2, 3) and / or the load states (L) of the combustion engine (1) and / or the operating states (R) of the retarder (4) are registered and, according to the indications of these data, the rotational distribution valve (10) and eventually the transport potential of the transport set (8) will be readjusted.
    [0006]
    6. Motor vehicle according to claim 5, characterized by the fact that the rotational distribution valve (10) has at least one position sensor, preferably an angle of rotation sensor, whose function is electronically controlled, preferably in a control feedback from the control device (14).
    [0007]
    7. Motor vehicle according to any one of the preceding claims, characterized by the fact that, in a heating function for the combustion engine (1), the retarder (4) is activated and its collateral cooling circuit (3) it is temporarily coupled, via the rotational distribution valve (10), to the main refrigeration circuit (2) in short circuit.
    [0008]
    Motor vehicle according to any one of the preceding claims, characterized by the fact that the rotational distributor (10b) of the rotational distribution valve (10) is elastically prestressed in a predetermined switching position (figure 6), in which both the main refrigeration circuits 2 as well as the collateral refrigeration circuit (3) are technically connected with the cooler (6) of the main refrigeration circuit (2).
    [0009]
    Motor vehicle according to any one of the preceding claims, characterized by the fact that the rotational distribution valve (10) and a transport assembly (8) of the main refrigeration circuit (2) are arranged in a common housing.
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    同族专利:
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    法律状态:
    2014-04-22| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-12-17| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-03-09| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-04-27| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 22/10/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102011116933.8|2011-10-26|
    DE201110116933|DE102011116933A1|2011-10-26|2011-10-26|Cooling circuit for a liquid-cooled engine|
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