WO2003026940A1

WO2003026940A1 - Valve block, with an integrated heating device, for a hydraulic vehicle braking system combined with a heat transfer circuit

Info

Publication number: WO2003026940A1
Application number: PCT/DE2002/002521
Authority: WO
Inventors: Johannes Schmitt
Original assignee: Robert Bosch Gmbh
Priority date: 2001-09-15
Filing date: 2002-07-10
Publication date: 2003-04-03
Also published as: DE10145582A1

Abstract

It is already known from published prior art DE 37 09 189 A1 to provide the valve block of a brake slip-controlled and/or traction slip-controlled vehicle braking system with a through bore so that a liquid heat transfer medium can be passed through that represents the liquid heat transfer medium of a cooling circuit of an internal combustion engine of the vehicle. The invention relates to a heat transfer circuit (3, 3a, 3b, 3c, 3d, 3e) and to the installation of the aforementioned valve block (2) in the heat transfer circuit. According to the invention, a heat transfer medium flows through the heating device (4) of the valve block (2) from a pump (12) of the heat transfer circuit to a combination (6) of a radiator (7) and a bypass line (8) and a multi-way valve (9). Alternatively, the valve block is disposed in the heating circuit.

Description

A VALVE BLOCK OF A HYDRAULIC VEHICLE BRAKING SYSTEM COMBINED WITH A HEATING DEVICE COMBINED WITH A HEAT TRANSFER CIRCUIT

State of the art

The invention relates to a heating device for a valve block of a hydraulic vehicle brake system according to the preamble of claim 1.

By the publication DE 37 09 189 AI known for a hydraulic Fahzeugbremsanlage valve block with a heater having a through the valve block extending through-bore and is connected by two lines to a cooling system of an internal combustion engine. In the cooling system is a liquid heat carrier, for example, water with a freezing temperature lowering additive. In one of the lines, a thermostat may be installed, which terminates a supply of the heat carrier to the heater when the valve block has reached its operating temperature. The document DE 37 09 189 AI leaves open as the cooling system is formed and where the two lines are connected to the not disclosed cooling system. By German Utility Model 71 30 079 a valve and at least one pump containing block is known for a hydraulic vehicle brake system, which is equipped with a heating device. The heating device has two connections shown in the manner of hose connections for the passage of a liquid heat carrier, which is the cooling liquid from a coolant circuit of a vehicle drive motor. The German utility model indicates that it is not necessary to send the entire coolant through the heating device. The cooling liquid circuit is not shown. The heating device is designed in the manner of a heat exchanger, which is attached to the block containing the valves.

It was therefore the task of known cooling liquid circuits or heat transfer circuits, which also have heaters for heating passenger compartments and in particular front windows, go out and propose advantageous connection points on the circuits for the heater. The person skilled in the art can start from heat transfer medium circuits, as described, for example, by the publications US Pat. No. 4,308,994, FR 2519694, DE 37 30 598 A1, EP 0 472 110 A1, EP 0 487 538 B1, EP 0 820 888 A2 and EP 0 952 314 AI are known.

Advantages of the invention

The inventive combination of a heater for a valve block in combination with a

Heat transfer circuit of a vehicle drive motor according to the characterizing features of claim 1 has the advantage that a leaking from the vehicle drive motor heat transfer stream in the direction of a combination of directed to a radiator and the bypass line bypassing the radiator, flows entirely through the heater and thus the heater provides heat available as soon as a temperature increase in the vehicle drive motor leads to heating of the heat carrier. If in this case the entire flow of the heat transfer medium flowing to the combination of cooler and bypass line passes through the heating device, the temperature of the valve block of the hydraulic vehicle brake system can follow the temperature rise in the heat transfer medium virtually instantaneously.

The inventive provided with a heater valve block according to the characterizing features of claim 2 has the advantage that only a partial flow of a combination of radiator and bypass flowing heat transfer fluid is passed through the heater, whereby a flow cross-section of the heater is advantageously kept close to a main cross section, which leads past the heater. This saves on drive power of a pump that circulates the heat transfer medium.

The heating device with the characterizing features of claim 3 provides the advantage that the temperature of the valve block, if it is sufficiently flowed around with fresh air, to a preselected temperature level of, for example, + 40 ° C to + 80 ° C is controllable, whereby at a this Temperature level associated viscosity of the pressure medium of the hydraulic vehicle brake system on the occasion of the actuation of the individual valves brake pressure build-up speeds and

Brake pressure lowering speeds are within narrow bands, which increases comfort during braking and effectiveness in brake slip control. The characterizing feature of claim 4 indicates an embodiment that win its adjustment energy from the heat of the valve block or the heat carrier in a technically simple manner. In contrast, the embodiment according to the characterizing feature of claim 5 has the advantage that the valve is electrically controllable in dependence on operating parameters, which in addition to the temperature of the valve block are taken into account.

The provided with a heater valve block of a vehicle brake system, which is combined with a elektroeträgerkreislauf a vehicle drive otors according to the characterizing feature of .Anspruch 6 has the advantage that the heating device is constantly flowed through by the heat transfer medium and thereby in the

Betriebseigenscha th the combination of cooler, bypass and temperature-controlled multi-way valve flow through the heater is then promoted if at low temperature of the heat carrier as a result of the specific setting of the multi-way valve heat transfer to the radiator over and passed only through the relatively narrow bypass and because of Flow resistances in • Bypass an increased flow through the heater of the valve block takes place. If the heat transfer medium reaches a temperature on the occasion of which the cooler is flowed through, the throughflow through the heating device of the valve block decreases, so that a type of temperature stabilization takes place on the valve block.

The characterizing features of claim 7 indicate a modification in which in a technically advantageous manner, the heater is installed in a brine, which is designed as a heating circuit and is suitable, even when the vehicle drive motor, the heating of a passenger compartment and / or the deicing of To allow Fahrzeugscheibεn. If such a heater in a conventional manner early enough before commissioning of the vehicle drive motor remote control by radio or per timer is put into operation, so the valve block of the hydraulic vehicle brake system is heated before commissioning the vehicle with the advantage that automatic generation of wheel brake quickly proceeds if at Starting the vehicle on a poor grip road, for example on wet ice or snow, wheel brake pressures are necessary to brake excess drive torque and thus limit traction to an advantageous level.

The characterizing features of claim 8 provide a useful embodiment of the heater in conjunction with the valve block and in combination with a heat transfer circuit. This embodiment is thanks to one of a first connection point on

Heat transfer circuit outgoing hose, which is pulled with a part of its length through the valve block and ends at a second connection point, inexpensive in construction education and assembly and has, because only two hydraulic connection points are to produce, a high degree of reliability.

The embodiment with the characterizing features of claim 9, however, uses a extending through the valve block metallic tube which is designed at both ends in the manner of hose connection piece and has the advantage that thanks to the metallic material, a good heat transfer from the passed heat transfer medium into the valve block. Another advantage is that two connecting pieces are provided by a single press-fitting process. drawing

In the drawings, a plurality provided with heaters valve blocks of a hydraulic vehicle brake system in combination with a heat carrier circuit and two concrete embodiments of the heater are shown. 1 to 6, the heating device with valve block of a hydraulic vehicle brake system in combination with a respective heat transfer circuit in a schematic representation and the figures 7 and 8 concrete embodiments of the provided with heaters valve blocks.

Description of the embodiments

In the exemplary embodiment according to FIG. 1, a valve block 2 of a vehicle brake system, not shown, is shown in combination with a heat carrier circuit. The valve block 2 contains at least not shown electrically controllable valves and, for example, at least one pump, not shown, so that at least for a wheel brake, not shown at arbitrary Bremsspedalbetätigurig a possibly generated Radblockiergefahr can be reduced or eliminated or that by automatic braking of a drive wheel torque over this Wheel is compensated and / or that is automatically braked asymmetrically to end a disadvantageously increasing yaw rate of the vehicle by a compensating torque around the vehicle's vertical axis. The valve block 2 shown schematically as a rectangle has a heating device 4, which is shown within the valve block 2 as a straight line and is formed according to the prior art or to be described in a novel manner. Exemplary embodiments thereof are disclosed below. The heat transfer circuit 3 belongs to an internal combustion engine 5 and contains for temperature control of the heat carrier, which may be a mixture of water and an antifreeze, a combination 6 with a cooler 7 and a bypass line 8, which bypasses the radiator 7, and a multi-way valve 9 for adjustment a situation-dependent favorable bypass ratio. In this case, the multi-way valve 9 may be formed as a valve with three terminals and, for example, for setting a bypass ratio not shown

Have expansion element which is exposed to the flowing through the bypass line 8 heat transfer medium. So that a cycle of the heat transfer takes place between the engine 5 and the combination 6, is a

Heat transfer outlet 10 of the engine 5 and an inlet port 11 of the combination 6 a pump 12 interposed. An outlet port 13 of the combination 6 and a heat carrier inlet port 14 of the internal combustion engine 5 are connected to each other by means of a line 15. For example, communicating with an inlet port 11 of the combination 6 may be provided a removable reservoir 16 of the prior art, which serves in a known manner to compensate for expansions and contractions of the liquid heat carrier due to temperature changes. In a manner known per se, the radiator 7 may be assigned a fan 17. In the example according to FIG. 1, the heating device 4 is between the

Wärmeträgerauslaßanschluß 10 of the engine 5 and the inlet port 11 of the combination 6 and arranged in series with the pump 12. Consequently, the heating device 4 is flowed through by a volume flow of the heat carrier moving from the pump 12. This has in the intended manner the advantage that by means of the heat carrier by the heat carrier outlet 10 from the internal combustion engine 5 led out thermal energy priority the heater 4 and thus the valve block 2 is available to its heating. This is especially true if the temperature of the internal combustion engine 5 is still below the operating temperature provided by the designer and therefore a volume flow delivered by the pump 12 is predominantly controlled by the bypass line and fed back through the line 15 into the internal combustion engine. From the heat transfer outlet 10 of the engine 5 exiting heat energy is thus largely kept far away from the cooler 7 in this operating condition. If thereafter, the temperature of the heat carrier continues to rise, the bypass ratio is adjusted by means of the multi-way valve 9, so that more heat transfer medium flows through the radiator 7, which prevents an undesirable increase in temperature of the heat carrier. In the exemplary embodiment of a heat carrier circuit 3 according to FIG. 1, therefore, the temperature of the valve block 2 can roughly correspond to that of the heat carrier. Depending on how the internal combustion engine 5 and the radiator 7 and the fan 17 are housed in a vehicle can heat the valve block 2, for example in winter or even cool in the summer when the engine is warm and depending on the season. The latter will be the case, for example, if an exhaust system of the internal combustion engine or a turbine housing of an exhaust gas turbocharger emits heat in the direction of the valve block 2.

An embodiment of a heat transfer circuit 3a according to the figure 2 differs from the brine circuit 3 according to the figure 1, characterized in that between the pump 12 and the inlet port 11 of the combination 6 and while the pump 12 downstream of a first Leitungsverzweiger 18 and then a main line 19 and a Secondary line 20 and finally a main line 19 and the secondary line 20 summarizing second Leitungsverzweiger 21 are installed. In this case, the secondary line 20 is the one Line that supplies the heater 4a. Because of the branching, the heating device 4 a can have a smaller cross section than the heating device 4 according to FIG. 1.

Another feature of the embodiment of Figure 2 is that in the course of the secondary line 20, a thermostatic valve 22 is installed. This thermostatic valve 22 is preferably arranged downstream of the heating device 4a and may, for example, have for its control a non-illustrated expansion element. The arrangement of the thermostatic valve 22 is used to keep the temperature of the valve block 2 below a typical for full-load operation of the internal combustion engine 5 temperature of the heat carrier at the Wärmeträgerauslaßanschluß 10. For this purpose, of course, the valve block 2 should be more exposed to a fresh airstream than a heated by the engine 5 airflow.

In the partially illustrated embodiment of a heat transfer circuit 3b according to FIG. 3, instead of a thermostatic valve 22, an electromagnetically controllable directional control valve 23 is installed. For example, the electromagnetically controllable directional control valve 23 in a stellung Sperrstellung controllable in response to an electrical temperature sensor, which is not shown and, for example, in heat-conducting contact with the valve block 2 can be attached to this.

A heat transfer circuit 3c shown in FIG. 4 also has a pump 12 and the combination 6 with the cooler 7. It goes from the pump 12, a line 24 from a Leitungsverzweiger 25 and from

Leitungsverzweiger 25 a line 26 to the inlet port 11 of the combination 6 and on the other hand, a heating line 27 through a Leitungsverzweiger 28 with the line 15 and the Heat transfer inlet port 14 of the engine 5 communicates and this way the heater 4a is supplied. In this example too, as in the examples according to FIGS. 2 and 3, the heating device 4a can have a smaller cross section than in the example according to FIG. It can be regarded as advantageous that at not yet reached operating temperature of the internal combustion engine 5, the multi-way valve 9 sets the ratio so that the radiator 7 undergoes almost no flow and in this case the bypass line 8 forms a throttle resistance, which leads to a flow through the heater 4a. Upon reaching the operating temperature of the internal combustion engine 5, the multi-way valve 9 will release more flow area to the radiator 7, which then less pressure gradient between the first Leitungsverzweiger 25 and the second

Line splitter 28 occurs and this kind of heat transfer to the valve block 2 is limited.

In the embodiment according to FIG 5 has a heat transfer circuit 3b in addition to a radiator 7 and a fan 17 and the internal combustion engine 5 associated Wärmeträgerauslaßanschluß 10 and the heat transfer inlet 14 yet another Wärmeträgerauslaßanschluß 30 and another heat carrier inlet port 31. Furthermore, a heating heat exchanger 32 and a carriage heater 33, for example of the type as shown and described in the document DE 37 30 598 AI. Accordingly, the carriage heater 33 has a combustion chamber and a circulation pump, so that when the internal combustion engine 5 heat carrier through the additional Wärmeträgerauslaßanschluß 30 can be removed, heated and pumped through the heating heat exchanger 32, from where the heat carrier flows back to the additional heat carrier inlet port 31. Here, the heater 4a of the valve block 2 is installed between the carriage heater 33 and the heater core 32. Recognizable Thus, in this example, the valve block 2 is primarily heated with heat energy emitted by the carriage heater 33. In the event that the carriage heater 33 is not turned on, a bypass - check valve 34 is to allow starting from the additional Wärmeträgerauslaßanschluß 30, a flow through the heater 4a and the heater core 32 toward the second heat carrier inlet port 31, wherein a pressure gradient required for the flow between the additional Wärmeträgerauslaßanschluß 30 and the additional heat carrier inlet port 31 in a conventional manner by means of a not shown in the figure 5 pump of the heat carrier circuit 3d is generated. In the usual manner 32, a fan 34 may be associated with ^'for the improved delivery of heat to the heating heat exchanger.

In the exemplary embodiment according to FIG. 6, an auxiliary circulation pump 33a is arranged separately from a carriage heater 33 and is installed between the carriage heater 33 and the heating heat exchanger 32. Here, the auxiliary pump 33a is disposed between this heater 4a and the heater core 32.

With reference to the illustrated and described examples of heat transfer circuits, it can be seen that there are a large number of modification options, depending on the design of the heat transfer medium, a heater 4 or 4a of the valve block 2 is preferably located close to that heat source that emits heat as the first heat source. In the example according to FIGS. 4 and 5, this is the carriage heater 33, since it is usually switched on by remote control or by a timer before starting the internal combustion engine 5. FIG. 7 shows the heating device 4a for a valve block 2 shown in detail, as it can be used in the exemplary embodiments for heat transfer medium circuits according to FIGS. 2, 3, 4, 5 and 6. With reference to FIG. 2, the secondary line 20 shown there is designed in the exemplary embodiment according to FIG. 7 as a hose line which is drawn through a through hole 40 located in the valve block 2. According to FIG. 7, the tube 20 lies tightly in the through-hole 40 for heat transfer. This embodiment is to be regarded as particularly inexpensive and safe to operate, for example, with reference to FIG. 4, because this line formed as a tube runs in one piece between the line splitters 25 and 28.

In contrast, an exemplary embodiment according to FIG. 8 is elaborate insofar as there is pressed into a through-hole 40 a heat-transfer tube 41 which projects at both ends and thus provides a first connection piece 42 and a second connection piece 43. Visible here is the heat transfer to the valve block 2 better, especially if the heat transfer tube is made of copper or aluminum, but the cost of securing hose ends is necessary. As an alternative to the pressed-in heat transfer tube, it would be possible to provide a screw thread on the input side and output side of the through hole 40 and screw in the connection nipple (not shown). Such an arrangement would again improve heat transfer. However, this would require special care in the production and sealing.

Claims

claims

Provided with a heater valve block of a hydraulic vehicle brake system in combination with a heat transfer circuit having for cooling a vehicle drive motor at least one heat transfer inlet and at least one Wärmeträgerauslaßanschluß and wherein at least one pump is disposed in the heat carrier circuit, characterized in that for cooling the vehicle drive motor in the heat transfer circuit (3 , 3a, 3b, 3c, 3d, 3θ) a combination (6) of a throughflow cooler (7), a cooler (7) bypassing the bypass line (8) and a temperature-controlled multiway valve arrangement

(9) for variably dividing a heat carrier stream into a stream through the cooler (7) and / or the bypass line (8) is arranged and that the heating device (4) in series for combination

(6) between this and the Wärmeträgerauslaßanschluß

(10) of the vehicle drive motor (5) is located.

A heater block provided with a hydraulic Fahrzeugbremsanläge in combination with a heat transfer circuit, which is used for cooling a vehicle drive motor, the vehicle drive motor having at least one heat transfer inlet and at least one Wärmeträgerauslaßanschluß and wherein at least one pump is arranged in the heat transfer circuit characterized in that for cooling the vehicle drive motor, a combination (6) of a flow-through cooler (7), a cooler (7) bypass line bypassing (8) and a multi-way valve assembly (9) for temperaturabhänig variable splitting a heat transfer stream into a stream through the radiator (7) and the bypass line (8) is arranged and that between the Wärmeträgerauslaßanschluß (10) of the

Vehicle drive motor (5) and the combination (6) are a main line (19) and connected in parallel a secondary line (20) and that the heating device (4a) is connected to the secondary line (20).

3. provided with a heater valve block of a hydraulic vehicle brake system in combination with a brine circuit according to claim 2, characterized in that in series with the heater (4a) in the secondary line (20) a temperature-dependent controllable valve (22, 23) is installed.

4. provided with a heater valve block of a hydraulic vehicle brake system in combination with a heat transfer circuit according to claim 3, characterized in that the valve (22) is designed as a thermostatic valve.

5. provided with a heater valve block of a hydraulic vehicle brake system in combination with a heat transfer circuit according to claim 3, characterized in that the valve (23) as an electromagnetically controllable directional control valve - is. A heating device provided with a valve block of a hydraulic vehicle brake system in combination with a heat transfer circuit, which is used for cooling a vehicle drive motor, the vehicle drive motor having at least one heat transfer inlet and at least one Wärmeträgerauslaßanschluß and wherein at least one pump in the heat transfer circuit is arranged, characterized in that the heating device (4a ) is at least indirectly connected to the Wärmeträgerauslaßanschluß (10) and the heat carrier inlet port (14) of the vehicle drive motor (5).

A heating device provided with a valve block of a hydraulic Fahrzeugbremsanläge in combination with a heat transfer circuit, which is used for cooling a vehicle drive motor, wherein the vehicle drive motor at least one heat carrier inlet port and a

Wärmeträgerauslaßanschluß and at least one pump in the heat carrier circuit, characterized in that at an additional Wärmeträgerauslaßanschluß (30) and an additional heat transfer inlet (31) a heating circuit is connected to a carriage heater (33) and a heating heat exchanger (32) and that the heating device (4a) of the valve block (2) between the carriage heater (33) and the heater core (32) is installed.

Provided with a heater valve block of a hydraulic vehicle brake system in combination with a heat transfer circuit according to one of claims 1 to 7, characterized in that the heating device (4,4a) consists of a through hole (40) in the valve block (2).

9. provided with a heater valve block according to claim 8, characterized in that the through hole (40) is penetrated by a voltage applied in him and by the heat transfer tube (20).

10. provided with a heater valve block of a hydraulic Fahrzeugbremsanläge in combination with a heat transfer circuit according to claim 8, characterized in that in the through hole (40) a preferably metallic heat transfer tube (41) is pressed, such that from the valve block (2) projecting ends of the heat transfer tube (41) form a first and a second hose connection piece (42, 43).