JP5186119B2 - Motorcycle brake equipment - Google Patents

Description

  The present invention relates to a motorcycle brake device based on the superordinate concept of claim 1, that is, a front wheel and a rear wheel brake circuit that can be hydraulically operated, and two main brake cylinders that operate both brake circuits independently. The circuit includes an inlet / outlet valve provided to control the brake pressure, a pump for supplying pressure to the front wheel and the rear wheel brake circuit operating based on the reverse feed principle, and a low-pressure accumulator connected to the pump suction side A first wheel brake in the first brake and a second wheel brake in the second brake, as well as the operation of the main brake cylinder attached to that brake on one of the two wheel brakes to independently generate the brake pressure Motorcycle brake with separate switching valve in each brake circuit which can act on the pumping pressure independently of the pump Apparatus on.

  From European Patent Application No. 1277635 (Patent Document 1), a motorcycle brake device of this kind is already known. The brake system has hydraulically actuable front and rear wheel brake circuits, wherein each individual brake circuit is connected to a main brake cylinder that is actuated by foot or by hand. For brake slip control, electromagnetically operable input / output valves are used in the front wheel and rear wheel brake circuits, and a pump for generating pressure in both brake circuits is provided. The rear-wheel brake circuit has an additional arrangement that enables pressure generation in the rear-wheel brake via a pump at the same time when the front-wheel brake circuit is manually operated without the need to operate the main brake cylinder of the rear-wheel brake circuit. Have.

  A first pressure sensor is disposed in the front wheel brake circuit, and can detect a manual operation of the front wheel brake circuit and operate a pump that generates an independent brake pressure in the rear wheel brake circuit.

  Depending on the positive recognition of the main brake cylinder of the front wheel brake circuit, the pump can be operated electrically and a controlled brake pressure is generated in the rear wheel brake.

  However, as the pump is started, there is a problem that pressure vibration that is returned to the manually operated main brake cylinder and uncomfortable with the manual brake lever is started. This pressure oscillation cannot be prevented by a significant increase in the opening pressure of the pump suction valve, which in any case led to further disadvantages with respect to pumping efficiency and an undesirable effect on the connected wheel brake.

Similar to that, when the main brake cylinder connected to the rear wheel brake circuit was activated, it was now possible to generate independent brake pressure in the front wheel brake circuit instead of the rear wheel brake circuit by electrical starting of the pump. At times, it can be introduced that the pressure vibration was also felt uncomfortable for the foot brake lever.
European Patent Application No. 1277635

Therefore, an object of the present invention is to provide a main brake in which the pressure vibration started at the start of the pump is manually or foot-operated regardless of whether the rear wheel brake circuit or the front wheel brake circuit is independently controlled. It is an improvement of a known type of motorcycle brake device so that it can not be returned to the cylinder.

  This object is achieved by providing the motorcycle brake device of the above type with the features of claim 1, i.e. each brake circuit without a separate switching valve is manually or foot-operated with a pressure that can be generated by a pump. This is solved by providing a valve switching portion that prevents the return action to the main brake cylinder.

  Other features and advantages of the invention will become apparent from the dependent claims and from the following detailed description of the embodiments based on the drawings.

  FIG. 1 schematically shows a hydraulic connection plan view of a motorcycle brake device according to the present invention. This brake device is connected to the front wheel brake circuit 4 and includes a main brake cylinder 7 that can be operated proportionally by manual force and a main brake cylinder 13 that can be operated proportionally to the foot force of the rear wheel brake 14. It consists of front and rear wheel brake circuits 4 and 10.

  For brake slip control, electromagnetically operable inlet / outlet valves 6 and 12 are incorporated in the front wheel and rear wheel brake circuits 4 and 10, respectively. At this time, the inlet valves 6 opened in the basic state are respectively front wheels or rear wheels. Built into the brake conduits of the wheel brake circuits 4, 10, the brake circuit connects the attached main brake cylinders 7, 13 to the front or rear wheel brakes 5, 14. The outlet valves 12 closed in the basic state are respectively incorporated in the return conduits 15 of the respective brake circuits, and the return conduits are divided into two circuits, one for the front wheel brake 5 and one for the rear wheel brake 14, respectively. Connected to the suction side of the pump 9, the pump operates based on the reverse feed principle. Since the pump 9 is connected to the brake conduit 18 via the silence chambers 17 incorporated in both brake circuits, feedback according to the demand of the brake fluid volume discharged from the front wheel brake 5 or the rear wheel brake 14 respectively. Is guaranteed.

  The rear wheel brake circuit 10 has, in addition to the already described features of the front wheel brake circuit 4, an electromagnetically actuable isolation valve 19 incorporated in the brake conduit 18 between the main brake cylinder 13 and the inlet valve 6. The isolation valve is open in its basic state. Further, a suction passage 21 guided through an electric switching valve 20 is connected to the brake conduit 18 of the rear wheel brake circuit 10 between the separation valve 19 and the main brake cylinder 13 up to the pump 9, whereby the rear wheel. The pump member effective for the brake circuit 10 discharges a pressure medium for increasing the pressure independently from the main brake cylinder 13 to the rear wheel brake 14 when the switching valve 20 is electrically excited, and the separation valve 19 is discharged from the main brake cylinder 13. In order to avoid returning to the vehicle, it is transported to the rear wheel brake 14 while being maintained in its electrically excited shut-off state.

  In order to detect the main brake cylinder pressure supplied to the front wheel brake circuit 4, the first pressure sensor 1 is present upstream of the inlet valve 6 in the brake conduit 18 of the front wheel brake circuit 4. In order to detect the rear wheel brake pressure in the rear wheel brake circuit 10, the second pressure sensor 2 is connected upstream of the inlet valve 6 in the rear wheel brake circuit, and the third pressure sensor is upstream of the isolation valve 19. So that the operation of the main brake cylinder 13 can also be known reliably.

  The inlet valve 6 limits the generated brake pressure to the brake conduit 18 in the two-circuit brake device. A brake pressure drop in the rear wheel brake occurs in the direction of both low-pressure accumulators 16 via an electromagnetically switchable outlet valve 12. For this purpose, the function description for controlling the brake slip should be adopted in a part of the following description part.

  The main brake cylinder pressure detected by the first pressure sensor 1 in the front wheel brake circuit 4 forms a guide amount for electrically operating the pump 9 incorporated in the rear wheel brake circuit 10, and the pump finally When the main brake cylinder 7 connected to the front wheel brake circuit 4 is operated, the electronic brake force distribution performed in the control device 8 to the separation switching valves 19 and 20 in cooperation with the inlet / outlet valves 6 and 12. Electrohydraulic brake pressure is generated in the rear wheel brake circuit 10 based on the characteristic curve.

  In order to evaluate the pressure sensor signal, a logic circuit is provided in the electronic control device 8, and the hydraulic pressure is controlled by the electrically operable pump 9 in the control device depending on the evaluation result of the pressure sensor signal. 10 is generated.

  The control device 8 forms an integral component of the brake unit 11, which is inserted so as to be in electrical contact with the pressure sensor integrated with the brake unit 11 and the inlet / outlet valves 6, 12 integrated therein. Has been. Thereby, the brake unit 11 can be fixed to the motorcycle frame in the vicinity of the battery based on a particularly compact construction.

Principle application:
1. The block gradient of the front wheel or the rear wheel is reliably recognized in the control device 8 by a wheel rotational speed sensor (not shown) and its signal evaluation. The inlet valve 6 disposed in the front wheel brake circuit 4 or the rear wheel brake circuit 10 is electromagnetically closed by the control device 8 to interrupt the front wheel brake circuit 4 or the rear wheel brake circuit 10 from further pressure generation.

  2. If additional pressure reduction is additionally required in the front wheel brake circuit 4 or the rear wheel brake circuit 10 to reduce the block slope, this is normally closed without flow, which can be connected to the low pressure accumulator 16, respectively. This is achieved by the outlet valve 12. The outlet valve 12 is closed as soon as the wheel acceleration again increases over a certain extent. In the pressure decreasing phase, since the appropriate inlet valve 6 remains closed, the main brake cylinder pressure generated in the front wheel brake circuit 4 or the rear wheel brake circuit 10 is transmitted to the front wheel brake circuit 4 or the rear wheel brake circuit 10. I don't get it.

  3. If the detected slip value again allows the pressure in the front wheel brake circuit 4 or the rear wheel brake circuit 10 to rise, the inlet valve 6 matches the requirements of the slip regulator integrated in the control device 8 in time. Limited to be released. The hydraulic volume required for the pressure increase is freely used by the pump 9.

  In addition to blade slip adjustment, the operation of the main brake cylinder 13 connected to the rear wheel brake circuit 10 based on the hydraulic connection concept (proportional to the foot force) is exclusively applied to the force of the rear wheel brake 14, that is, the front wheel brake circuit 4. The proportional pressure action remains indefinitely without pressure until the operation of the main brake cylinder 7 connected to the front wheel brake circuit 4 (proportional to the manual force).

  As a characteristic of the introduced motorcycle brake system, the force-proportional operation of the front wheel brake circuit applies that the rear wheel brakes are braked together independently by means of a suitable pump. For this purpose, the pump 9 takes out the pressure medium from the main brake cylinder 13 via the electrically opened switching valve 20 and transports the pressure medium to the rear wheel brake 14. In this case, the isolation valve 19 is electrically actuated and always remains closed, thereby ensuring that the pump pressure does not leak into the main brake cylinder 13.

  In both brake circuits, the return action of the pump pressure to the brake circuit with the main brake cylinder 7 manually operated on the basis of the two circuits of the pump 9 and the simultaneous pressure rise connected thereto is not desired and therefore independently It must also be avoided in a brake circuit that is not manually actuated during a pressure increase that can be freely adopted and, therefore, according to the invention, a valve that avoids the return of pump pressure to the manually actuated main brake cylinder. A switching unit has been proposed.

  Basically, it can be applied to all hydraulic connection planes according to FIGS. 1-4, and therefore the present invention can be applied to a main hand operated by a hand or a foot with a pressure that can be generated by the pump 9 with each brake circuit having a separation switching valve 19,20. It is contemplated that a valve switching unit 23, 24 or 23, 25 for preventing the return action to the brake cylinder 7 or 13 is provided.

  The valve connection has a pump circulation valve 23 which is incorporated in the conduit 27 as a basic component of all embodiments according to FIGS. 1-4, which bypass connection between the suction side and the pressure side of the pump 9 Forming part.

  In all the embodiments according to FIGS. 1 to 4, the pump circulation valve 23 is formed as a 2 / 2-way seat valve which is closed in the basic state, which is the pump circulation valve 23 when the pump 9 is started. If the main brake cylinder 7 or 13 connected upstream with respect to is to be manually actuated and an independent wheel brake pressure is to be generated by the pump 9 into the brake circuit having the separation switching valves 19, 20 electrically Therefore, the separation valve 19 takes its shut-off state, the switching valve 20 takes its released connection state, and the pump can suck in brake fluid from the main brake cylinder 7 or 13 connected to the switching valve 20. And

The released pump circulation valve 23 causes a hydraulic short circuit or internal pump circulation between the pump suction side and the pump pressure side. In this case, the main brake cylinders 7 and 13 operated in FIG. In order to avoid the return action of the pump pressure to the valve , the shut-off multi-way valve 24 is braked before the selectively spring-loaded check valve 24 in FIGS. 3 and 4 is connected to the pump pressure line. Located in the conduit 18.

From the connection plane according to FIGS. 1 and 2, one end of the conduit 27 connected to the pump pressure side is connected between the outlet of the pump 9 and the multidirectional valve 24, whereas the conduit leading to the pump suction side It becomes apparent that the other end of the passage 27 is connected upstream to the pressure holding valve 28 which is arranged at the outlet of the low-pressure accumulator 16.

  In contrast, from the connection plane based on FIGS. 3 and 4, one end of the conduit 27 on the pump pressure side is connected between the outlet of the pump 9 and the check valve 25, whereas it is led to the pump suction side. It becomes apparent that the other end of the conduit 27 is connected upstream to the pressure holding valve 28 located at the outlet of the low pressure accumulator 16 as in FIGS.

The use of the check valve 25 has the advantage of being small and inexpensive with respect to the multi-way valve 24 without having to be limited in terms of functional reliability. Since the check valve 25 opens in all cases when the opening pressure of approximately 5 bar is exceeded, on the one hand, the return action of the pump pressure to the activated main brake cylinder 13 is reliably prevented, On the other hand, however, it is designed to avoid unacceptably high system pressures. As soon as the active brake slip adjustment is not used by the pump 9 in the brake circuit with the check valve 25, the auxiliary outlet valve 12 will stay in a shut-off state indefinitely, so that the pump 9 will have a relatively high opening pressure of the check valve 25. May not achieve. Therefore, in a non-brake slip operation of the motorcycle brake system, the return action of the pump pressure to the respectively activated main brake cylinder 7 or 13 is prevented in a simple manner.

  In FIG. 3, the check valve 25 is arranged upstream with respect to the conduit 27 which branches off into the pump pressure valve and the pump pressure conduit. In the appropriate switching of the pump 9 according to FIG. 4, the pump pressure valve perceives the function of the check valve 25, so that the conduit 27 provided in the pump circulation valve 23 is directly connected to the original pump element of the pump 9. And the check valve 25 is guided into the pump pressure space.

Further comprising a Haiyuben 26 to the suction side of the pump 9 in each connection plane according to FIG. 1 through 3, the Haiyuben 26 side suction pump in electrically open connection state to the brake conduit 18 Connect to the connected main brake cylinder 7 or 13. This reliably prevents the storage of air between the pump suction side and the pressure holding valve 28. The drain valve 26 is formed as a 2/2 road seat valve that is closed to the basic state, and this road seat valve assumes a blocked state that is mapped after the ventilation process.

  Unless all other details that have become apparent from FIGS. 2 to 4 have been discussed so far, this functionally and structurally corresponds to the described connection plane according to FIG. 1, in this case, All figures for equal elements have the same reference signs. Unlike FIG. 1, in the connection planes according to FIGS. 2 to 4, the front wheel brake circuit can be independently controlled depending on the manual operation of the rear wheel brake circuit, in which case each rear wheel brake 14 In addition, in order to accurately detect the brake pressure generated in the front wheel brake, the pressure sensor 2 is disposed in the rear wheel brake 14 and the front wheel brake, particularly for brake slip control of both brake circuits.

  Therefore, in summary, it can be determined whether the rear wheel brake or the front wheel brake can be controlled independently by electrohydraulic under the cooperating action of the attached separation switching valve. Due to the valve arrangement according to the invention in the actuated main brake cylinder, the brake circuit connected to that main brake cylinder cannot likewise be controlled independently and the pressure increase in the independent brake circuit during operation of the two-circuit pump 9 If you do this, you will not feel the pump pressure return effect.

The pump 9 can be formed as a stepped piston pump on the basis of the proposed inventive features, in which the drain valve 26 is closed and the connected low-pressure accumulator 16 is empty, as is known. If so, the stepped piston pump can carry the volume. The cause for this is the negative pressure generated by the stepped piston between the suction valve 29 of the pump 9 and the normally closed drain valve 26, which can lead to the release of brake fluid. In such a case, the discharge volume reaches the compression chamber of the pump 9 via the suction valve 29, and the brake circuit that is manually operated when the pressure rises in the independent brake circuit has a main brake operated by hand or foot. Instead of the direction of the cylinder 7 or 13, it is now conveyed by the valve arrangement according to the invention as a short-circuit flow in the pump circulation, in which the low-pressure accumulator 16 connected to the conduit 27 is preferably the pressure generated by the pump 9 Used to buffer impulses.

1 shows a hydraulic connection plane for a motorcycle brake device according to a first embodiment, wherein the front wheel brake circuit is provided with a valve arrangement for preventing the return action of the pump to the manual brake lever during independent operation of the rear wheel brake. Fig. 5 shows a hydraulic connection plane for a motorcycle brake device of the second embodiment, wherein the front wheel brake circuit is provided with a valve arrangement that prevents the pump return action to the foot brake lever during independent operation of the front wheel brake circuit. FIG. 3 shows a hydraulic connection plane according to FIG. 2 with a simplified valve connection that prevents the pump from returning to the foot brake lever in the rear wheel brake circuit during independent operation of the front wheel brake circuit. Fig. 4 shows a hydraulic connection plane according to Fig. 3 with a re-simplified valve connection that prevents the return action of the pump to the foot brake lever.

1. . . . . Pressure sensor . . . . 2. Pressure sensor . . . . Pressure sensor 4. . . . . 4. Front wheel brake circuit . . . . Front wheel brake . . . . Inlet valve 7. . . . . Main brake cylinder 8. . . . . Control device 9. . . . . Pump 10. . . . Rear wheel brake circuit 11. . . . Brake unit 12. . . . Outlet valve 13. . . . Main brake cylinder 14. . . . Rear wheel brake 15. . . . Circulation conduit 16. . . . Low pressure accumulator 17. . . . Silence room 18. . . . Brake conduit 19. . . . Separation valve 20. . . . Switching valve 21. . . . Suction side 22. . . . Compensation container 23. . . . Pump circulation valve 24. . . . Multi-directional valve 25. . . . Check valve 26. . . . The oil discharge valve 27. . . . Conduit path 28. . . . Pressure holding valve 29. . . . Suction valve 30. . . . pressure sensor

Claims (8)

It has front and rear brake circuits that can be hydraulically operated, has two main brake cylinders that operate both brake circuits independently, and has an inlet / outlet valve that is provided to control brake pressure in each brake circuit, before a pump for supplying pressure to the wheel and a rear wheel brake circuit, comprising a low-pressure accumulator connected to the pump suction side, it comprises a first wheel brake in a first brake and the second wheel brake of the second in the brake, In addition, a motorcycle having a separate switching valve for generating brake pressure independently of one of the two wheel brakes in a brake circuit acted on by the transport pressure of the pump irrespective of the operation of the main brake cylinder attached to the brake. In the brake system,
Valve switching unit to block the return action of the hand pressure actuated or foot actuated main brake cylinder (7 or 13) which can be generated by braking circuit having no separation switching valve (19, 20) is a pump (9) ( 23, 24; 23, 25),
The said valve switching part is formed from the pump circulation valve (23) inserted in the conduit line (27) which makes the detour coupling part between the suction side and pressure side of a pump (9), The motorcycle characterized by the above-mentioned. Brake device. The conduit (27) is connected to the pressure side of the pump (9) between the outlet of the pump (9) and the spring-loaded check valve (25), the check valve having a defined opening pressure. 2. The motorcycle brake device according to claim 1 , wherein the motorcycle brake device can be hydraulically lifted from the valve seat in the direction of the pumping flow when it is raised.   The pump circulation valve (23) is formed as a 2 / 2-way seat valve closed in the basic state, and is not connected to a brake circuit having a separation switching valve (19, 20) when the pump (9) is started. 2. The motorcycle brake device according to claim 1, wherein the 2 / 2-way seat valve is electrically opened when the main brake cylinder (7 or 13) is manually operated. Conduit passage (27) is connected to the pump pressure side between the outlet and the multi-way directional valve of the pump (9) (24), electrically seat this multidirectional way valve (24) in the direction of the pumping flow The motorcycle brake device according to claim 1 , wherein the motorcycle brake device can be lifted from the vehicle. The suction side of the pump can be connected to the pump pressure side via the pump circulation valve (23) (9) are additionally connected Haiyuben (26), this Haiyuben in its open connection status motorcycle brake system according to claim 1, characterized in that the pump suction side is connected to the connected main brake cylinder to the brake conduit (18) (7 or 13). 6. Motorcycle according to claim 5 , characterized in that the oil discharge valve (26) is formed as a 2 / 2-way seat valve closed in the basic state by a spring force, the 2 / 2-way seat valve being electrically operable. Brake device. The conduit (27) on the pump suction side is connected upstream of the pressure holding valve (28) to the inlet of the low pressure accumulator (16), and the low pressure accumulator outlet has a pressure holding valve (28). The motorcycle brake device according to claim 1 . When each main brake cylinder (7 or 13) not connected to the brake circuit having the separation switching valve (19, 20) is manually operated at the time of starting the pump (9), the pump circulation valve (23) There takes its electrical open connection state, multi-way bypass valve (24) is a motorcycle brake apparatus according to any one of claims 1 to 7, characterized in that taking the electrical closed connection state.

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