KR20230104950A - An electronic device that selects and commands electrical signals for operation of the electrically actuated brake caliper of a parking brake system. - Google Patents

Abstract

The present invention relates to an electronic device (30) for selecting and routing electrical signals for actuation of an electrically actuated brake caliper of a parking brake (100) of a vehicle, in particular a motor vehicle. The device comprises: - first and second inputs (IN1 and IN2) receiving electrical signals (S1, S2) for actuating the electrically actuated brake caliper; - a first and at least one additional first output (OU1 and OU1') connected to a first electrically operated brake caliper (10) comprising at least two electric motors; - a second and at least one further second output (OU2, OU2') connected to a second electrically actuated braking caliper (20) comprising at least two electric motors; The device comprises controllable electronic connection means (SW1, SW2, SW3, SW4) to assume an open state and a closed state. When the parking brake is deactivated, the electronic linkage means is controlled to assume an open state to isolate the first and second inputs from the aforementioned outputs; When the parking brake is activated, the electronic linkage means switches from an open state to a closed state so that any two of the first output, the second output, the at least one additional first output, and the at least one additional second output are switched. is selectively controlled to connect the first and second inputs to. Accordingly, the electrical actuation signal is routed towards the selected electric motor of the electrically actuated brake caliper.

Description

An electronic device that selects and commands electrical signals for operation of the electrically actuated brake caliper of a parking brake system.

The present invention relates to the field of electric braking, in particular electric parking brake (EPB) of vehicles, more particularly motor vehicles. More particularly, the present invention relates to an electronic device for selecting and routing electrical signals for actuating a braking system, in particular an electrically actuated brake caliper of a motor vehicle, more particularly a parking brake of a motor vehicle.

As is known, braking systems are mainly used for two purposes: service braking and parking braking. The term "service braking" refers to any action on the braking system that applies braking or deceleration to a moving vehicle to create a modular vehicle deceleration and is reversible (i.e., the action is canceled when the command is removed). On the other hand, the term “parking brake” refers to a braking action that generates a force that prevents the vehicle from moving even after the command is removed in a state where the vehicle is stopped. Such braking action is of the irreversible type and requires a specific release command to remove the force impeding vehicle movement. Both types of braking can be activated on command from the driver or other driver assistance systems.

Today, electric parking brakes (EPB) are used in motor vehicles, especially automobiles, to hold the vehicle stationary on both inclined and flat roads. In the past, the manual parking brake was used to accomplish the same function.

Such an electric parking brake involves the use of an electrically operated brake caliper, i.e., operated by an electric motor dedicated to the parking brake function.

The holding mechanism of the vehicle's electric parking brake can be activated by the driver at the touch of a button. As a result of such activation, the electronic control system is configured to activate an electric motor located in the brake caliper to advance the piston, thereby biasing the respective brake pad in contact with the braking surface of the brake disc connected to the vehicle wheel, thus stopping its movement. do. In most cases, the manual or EPB parking brake acts on the vehicle's rear axle wheels.

In some cases, the brake caliper used to apply the parking brake action is a specially designed brake caliper separate from the brake caliper used to apply the service brake action. In fact, since there is no moving mass, the energy associated with the parking brake is certainly less than the energy that the service brake has to apply.

Service brake calipers, also used as parking brake calipers, are known, for example as described in US3734248, US5343985, US2016167632, US5090518, US2009242338, US2014076672, US10525958, and US2019120311.

The device for the electric parking brake EPB uses an actuator configured to act on an electronic control unit (ECU) and an electric motor of an electrically-actuated caliper. For this reason, EPB systems can be considered a subset of braking systems that operate with brake-by-wire (BBW) technology.

Dedicated power electronic circuitry, e.g., electronic circuitry in full-bridge transistor configuration (circuits comprising solid-state components) to drive the electric motors for actuating the electrically-actuated calipers of the EPB parking brake. It is known to use an electronic circuit (if driven using a switch) or an electronic circuit using a diverter relay (if driven using a switch).

In particular, known and currently available EPB parking brakes are made according to two different implementation types:

- Parking braking of the first type involves the use of a special electronic control unit, or an ECU dedicated thereto, comprising two power electronic circuits in a full bridge transistor configuration, each circuit driving an electric motor connected to a brake caliper. can be used to drive;

- The second type of parking brake uses two power electronic circuits in a full bridge configuration with transistors included or integrated in the ABS/ESP control unit already installed in the vehicle. Again, each full bridge power circuit can be used to drive a single electric motor coupled with a brake caliper.

The search for new actuation solutions for electric parking brakes applicable to monobloc or floating type brake calipers has recently led to the devising of electrically-actuated calipers containing two or more electric motors in each caliper dedicated to the parking brake function. It became.

Controlling these types of calipers either requires a new electronic control unit capable of driving four or more motors, or requires the use of a standard electronic control unit for each caliper, as currently known devices used to control EPBs use only two electric motors. because it drives Control of such calipers therefore requires EPB electric parking brakes which are too complicated and economically disadvantageous.

First, the need to improve braking action, especially parking braking action, is still felt.

Therefore, there is a strong need to control electrically-actuated calipers comprising two or more electric motors for each caliper dedicated to the vehicle's parking braking function that can overcome the limitations and disadvantages of the known solutions mentioned above.

When the braking caliper is also used as a parking braking caliper, the need to prevent abnormal operation of the braking caliper is also felt. For example, the resultant action on the pads results in "skewing" of the pads themselves, i.e., abnormal movement of the pads in the seat provided on the caliper body, thus creating excessive asymmetric or asymmetric loads on, among other things, the brake caliper body. It is felt that the caliper needs to have more than one electric motor to operate the caliper, in order to ensure that it does not result in pad action.

An overriding object of the present invention is to limit the complexity of the braking system by being configured to select and route electrical signals for actuating an electrically actuated brake caliper of a parking brake of a vehicle, in particular a motor vehicle, for example a motor vehicle, To devise and provide an electronic device enabling efficient driving of electrically actuated braking calipers each comprising at least two electric motors.

This object is achieved by an electronic device according to claim 1 for selecting and routing electrical signals for actuation of an electrically actuated brake caliper of a parking brake.

In particular, such an electronic device 30 that selects and routes electrical signals:

- first and second inputs (IN1 and IN2) receiving electrical signals (S1, S2) actuating the electrically actuated brake caliper;

- a first and at least one additional first output OU1 and OU1' connected to the first electrically operated brake caliper 10;

- a second and at least one additional second output (OU2, OU2') connected to the second electrically operated brake caliper (20);

- electronic connection means (SW1, SW2, SW3, SW4) controllable to assume an open state and a closed state, wherein:

- when the parking brake 100 is deactivated, the electronic connection means (SW1, SW2, SW3, SW4) outputs the first and second inputs (IN1 and OU2') from the outputs (OU1, OU2, OU1', OU2'). IN2) is controlled to take an open state to disconnect;

- when the parking brake system 100 is activated, the electronic connecting means SW1, SW2, SW3, SW4 switches from an open state to a closed state, so that the first output OU1 and the second output OU2 , is selectively controlled to connect the first and second inputs IN1 and IN2 to any two of at least one additional first output OU1′ and at least one additional second output OU2′. .

Accordingly, the electrical actuation signals S1 and S2 are routed each time towards the two electric motors of the electrically actuated brake caliper.

A further object of the invention is to be able to alternately drive the electric motors of the two brake calipers of an EPB parking brake.

Yet another object is to be able to drive the electric motors of the two brake calipers for a predetermined time interval of tens to hundreds of milliseconds to produce a more uniform forward movement of the pistons.

A further object of the present invention is to provide a motor vehicle comprising an EPB parking brake device according to claim 8 and the aforementioned device according to claim 14 .

Some advantageous embodiments are the subject matter of dependent claims.

Additional features and advantages of the present invention will become apparent from the description provided below of preferred embodiments, given in non-limiting terms, with reference to the accompanying drawings, wherein:
1 shows an electrical diagram for operating an electrically operated brake caliper according to the invention, connected between an electronic control unit of an EPB device and an electrically operated brake caliper of a motor vehicle comprising two electric motors for each caliper; Diagrammatically shows an example of an EPB parking brake system comprising an electronic device for selecting and routing signals;
- Fig. 2 shows a time-dependent diagram of the control signals of the electronic switch controlled in the switching included in the electronic selection and routing device of Fig. 1;
- FIG. 3 diagrammatically shows a vehicle with two brake calipers and two floating brake calipers, which are separate parts on a large scale, each of which is mono with four pistons and four independent electric motors. It is a block type, connected to each front wheel, and each of the two floating brake calipers has only one piston and each electric motor connected to the two rear wheels;
- Figure 4 shows again graphically a second vehicle configuration with two brake calipers and two floating brake calipers as separate parts, which are greatly enlarged, each of the two brake calipers having two pistons and four independent electric It is a floating type with a motor, connected to each front wheel, and two floating brake calipers each with only one piston and a respective electric motor, connected to each rear wheel;
- Fig. 5 shows an axonometric view of a monobloc brake caliper connected to a brake disk with four pistons driven by four independent electric motors;
- Fig. 6 shows a perspective view of a floating brake caliper with two pistons driven by two independent electric motor-reducers;
- Figure 7 shows a perspective view of a floating brake caliper with a single piston driven by an electric motor-reducer;
- Figure 8 shows a perspective view of a hydraulic and electromechanical service and parking disc brake comprising a monoblock brake caliper with two hydraulically actuated pistons (service brake) and two independent electric motors (parking brake);
- Fig. 9 shows a sectional view of a braking caliper for the disc brake of Fig. 8;
- Fig. 10 shows an enlarged detail of Fig. 9;
Similar or identical elements in the foregoing figures are denoted by like reference numerals.

Referring to FIG. 1 , a simplified block diagram of a device for parking braking (Electric Park Brake or EPB) of a motor vehicle 2 , in particular a motor vehicle, according to the present invention is indicated generally by the reference numeral 100 .

In this description, the term "stopped" is used to indicate that the vehicle is parked with the engine turned off. In such conditions, the holding mechanism of the motor vehicle's electric parking brake can be activated by the driver, for example by actuating a button. Following such activation, the brake caliper is actuated by an electric motor to apply the respective pad to the brake disk of the vehicle wheel to block the brake disk.

Similarly, if the driver presses the button again, the electric parking brake hold mechanism is deactivated.

The above-described parking brake device 100 includes an electronic control unit 50 of a braking device and an electrically operated brake caliper 10, 20 acting on a brake disc of a wheel of a vehicle, thereby providing an electrically operated brake provided in a vehicle. It should be noted that by employing components already included in the device, it is configured to implement the electric parking brake function.

In the present invention, in particular, the aforementioned electrically actuated brake calipers 10, 20 of the device 100 may include one, two or more electric motors for each caliper. Referring to the example of FIG. 1 , each of the electrically actuated brake calipers 10, 20 includes two electric motors. As is known, each such motor is configured to actuate a respective piston (not shown in FIG. 1 ), each piston comprising one or another semi-, forming a respective brake caliper 10 , 20 . By acting on the caliper, it causes the caliper to be clamped onto the brake disc or vice versa, released from the disc.

In particular, in the example of FIG. 1 , the parking brake system 100 includes first and second electrically actuated brake calipers 10 and 20 . The first electrically actuated brake caliper 10 comprises, for example, a first and at least one further first electric motor RI and RE. The second electrically actuated brake caliper 20 comprises, for example, a second and at least one further second electric motor LE and LI. In other words, each caliper 10, 20 includes a first electric motor RI, LI configured to act on the semi-caliper facing the inside of the vehicle and a second electric motor configured to act on the semi-caliper facing the outside of the vehicle ( RE, LE).

In an exemplary embodiment, the aforementioned first and second electrically actuated brake calipers 10 and 20 are connected to the wheels of the rear axle 5 of the motor vehicle 2 .

In a different exemplary embodiment, the aforementioned first and second electrically actuated brake calipers 10 and 20 are connected to the wheels of the front axle 6 of the motor vehicle 2 .

All of these solutions are equally applicable to keeping vehicles stationary both on ramps and on flat roads.

In still a different exemplary embodiment, the first electrically operated brake caliper 10 is connected to a wheel of the rear axle 5 of the motor vehicle 2 and the second electrically operated brake caliper 20 is connected to the motor vehicle 2 It is connected to the wheel of the front axle (6) of the.

Such a configuration is particularly advantageous since it is possible to keep the vehicle stationary when parked on an uneven road with different inclinations at the wheels of the rear and front axles.

Furthermore, the parking brake system 100 includes the above-mentioned electronic control unit 50 (or ECU), which electronic control unit operates, for example, the electrically actuated brake caliper 10, 20 with a first control unit. and a microcontroller or microprocessor configured to generate second electrical signals S1 and S2.

Hereinafter, reference will be made generally to the aforementioned electrical actuation signals S1 and S2, which indiscriminately actuate the electric motor (and each piston) to cause the caliper to tighten the brake disc or vice versa to release it from the disc. It means you can make it happen.

In an exemplary embodiment, such an electronic control unit 50 is configured to generate first and second electrical signals S1 and S2 respectively, for example to actuate the electrically actuated brake calipers 10, 20. In a full-bridge transistor configuration, it is implemented as a dedicated electronic control unit including first and second power electronic circuits CP1 and CP2.

In a different exemplary embodiment, such an electronic control unit 50 is embodied in an ABS/ESP control unit already equipped in a motor vehicle. In such a case, first and second additional power electronic circuits CP1 and CP2 are included or integrated in such an ABS/ESP control unit, for example, and actuate the electrically operated brake caliper 10 , 20 . and a full-bridge transistor configured to generate the second electrical signals S1 and S2.

Moreover, the parking brake device 100 of the present invention advantageously includes an electronic device 30 for selecting and routing electrical signals that actuate the electrically actuated brake calipers 10, 20 of the device.

In particular, such an electronic device 30 has first and second inputs IN1 and IN2 receiving the above-mentioned first and second electrical drive signals S1 and S2 generated by the electronic control unit 50 . includes

Moreover, the electronic device 30 includes:

- a first and at least one additional first output (OU1 and OU1') connected respectively to a first and at least one further first electric motor (RI and RE) of the first electrically operated brake caliper (10);

- a second and at least one further second output (OU2 and OU2') connected to a second and at least one further second electric motor (LE and LI) respectively of the second electrically operated brake caliper (20).

Moreover, the electronic device 30 of the present invention includes electronic connecting means SW1, SW2, SW3, SW4 controllable to assume an open state and a closed state.

In particular, when the parking brake system 100 is deactivated, those electronic connecting means SW1, SW2, SW3, SW4 are controlled to assume an open state. Thus, the first and second inputs IN1 and IN2 are separated from the aforementioned outputs OU1, OU1', OU2 and OU2'.

Instead, when the parking brake system 100 is activated, those electronic connecting means SW1, SW2, SW3, SW4 switch from the open state to the closed state to output the first output OU1, the second output OU2, Connect the aforementioned first and second inputs IN1 and IN2 of the device 30 to any two of the at least one additional first output OU1' and the at least one additional second output OU2'. selectively controlled to

Accordingly, the electrical actuation signals S1 and S2 are routed towards the selected electric motor of the electrically actuated brake caliper.

In an exemplary embodiment provided as a non-limiting example of the present invention, the aforementioned electronic switching means includes first, second, at least third and at least fourth switches (SW1, SW2, SW3, SW4) to be switched controlled. do.

In particular, such an electronic switch can be controlled for switching based on first and second control signals EN1 and EN2 generated by the electronic control unit 50 and having time trends shown in FIG. 2, for example.

In the example of FIG. 1 , the parking brake system 100 includes two calipers, each of which includes two electric motors. Thus, the selection and routing device 30 includes a total of four electronic switches.

However, the teachings of the present invention can also be applied in the case of braking devices using calipers each comprising more than two electric motors. A person skilled in the art can modify the number and configuration of the electronic switches of select device 30 such that the two actuation signals S1 and S2 are always routed to any two of these motors.

In the exemplary embodiment of FIG. 1 , the first control signal EN1 is configured to simultaneously act on the first and fourth switches SW1 and SW4, and the second control signal EN2 is configured to act on the second and third switches ( SW2 and SW3) can act simultaneously.

In such an exemplary embodiment, when the parking brake 100 is activated:

The first and fourth switches SW1 and SW4 respectively connect the first input IN1 of the device 30 to the first output OU1 and the second input IN2 during the first time interval T1. is controlled by the first control signal EN1 to switch from an open state to a closed state in order to connect the at least one additional second output OU2' to the at least one additional second output OU2'.

In this case, the second and third switches SW2 and SW3 are controlled by the second control signal EN2 to take an open state.

In the same example, when the parking brake device 100 is activated at the end of the first time interval T1:

The first and fourth switches SW1 and SW4 are controlled by the first control signal EN1 to switch from the closed state to the open state,

Each of the second and third switches SW2 and SW3 switches from an open state to a closed state during a second time interval T2 after the first time interval T1 to connect the first input IN1 to the device 30. and by a second control signal EN2 to connect the second input IN2 to the at least one additional first output OU1'.

In a different exemplary embodiment, not shown in FIG. 1 , the first control signal EN1 can act on the first and third switches SW1 and SW3 simultaneously, and the second control signal EN2 can act on the second and third switches SW1 and SW3 simultaneously. It is configured to act simultaneously on the fourth switches SW2 and SW4.

In such an exemplary embodiment, when the parking brake 100 is activated:

Each of the first and third switches SW1 and SW3 switches from an open state to a closed state during a first time interval T1 to connect a first input IN1 to a first output OU1 of the device 30, and controlled by a first control signal (EN1) to couple the second input (IN2) to the at least one additional first output (OU1');

The second and fourth switches SW2 and SW4 are controlled to assume an open state.

In the same example, when the parking brake device 100 is activated at the end of the first time period T1:

The first and third switches SW1 and SW3 are controlled to switch from the closed state to the open state,

Each of the second and fourth switches SW2 and SW4 switches the first input IN1 from the open state to the closed state during the second time interval T2 after the first time interval T1, so that the first input IN1 is connected to the device 30. and connect the second input IN2 to said at least one further second output OU2'.

In view of the above, the electronic device 30 for selecting and routing the input signals IN1 and IN2 is configured to operate as a demultiplexer for such signals.

In the above exemplary embodiment, referring to FIG. 2 , the first and second control signals EN1 and EN2 are, for example, square wave signals having the same frequency but shifted by 180° from each other.

In such a case, the first and second time intervals T1 and T2 are equal to each other and coincide with a half period of such a square wave signal.

The duration of this half cycle is fixed and falls within the range of, for example, 10 msec - 100 msec.

In still a different exemplary embodiment, the first control signal EN1 coincides with the second control signal EN2. In other words, the first and fourth switches SW1 and SW4 are controlled to take a closed state simultaneously with the second and third switches SW2 and SW3.

In such a case, when the parking brake system 1000 is activated, the first, second, third, and fourth switches SW1, SW2, SW3, and SW4 are switched from the open state to the closed state at the same time at a third time interval. It is controlled to maintain the closed state during T3 (not shown in the drawing), whereby the first input IN1 is simultaneously connected to the first and second outputs OU1 and OU2, and the second input IN2 is simultaneously connected to at least one additional first and at least one additional second output OU1', OU2'.

In particular, the Applicant has introduced an electronic device 30 for selecting and routing the above-mentioned electrical actuation signals, thereby avoiding unduly increasing the complexity of the brake arrangement, the same electronic control unit already provided in the electrically actuated brake control device. It has been confirmed that it is possible to effectively drive two electrically actuated brake calipers each comprising at least two electric motors using (50).

Furthermore, the electronic selection and routing device 30 can be used to alternately drive the electric motors of any two brake calipers of the EPB parking brake. For example, it is possible to first control the operation of the motors RI and LI directed toward the inside of the vehicle and then control the motors RE and LE directed toward the outside of the vehicle. Alternatively, the electronic selection and routing device 30 may drive one internal motor and one external motor.

Moreover, with the electronic selection and routing device 30 it is possible to simultaneously drive the motor of the same caliper and then drive the motor of another caliper.

Moreover, the electronic selection and routing device 30 makes it possible to drive the electric motors of the two brake calipers during a time interval T1 , T2 of preset duration of tens of milliseconds to hundreds of milliseconds. Thus, a more uniform forward movement of the piston can be produced.

The invention further relates to a motor vehicle comprising an electrically actuated braking device 100 according to any one of the embodiments described above.

The aforementioned electronic control unit 50 is stored in a respective memory application software configured to implement a method of implementing the control logic of the present invention. Such application software is implemented in particular by functional blocks.

In an exemplary embodiment, the parking braking method of vehicle 2 includes:

- providing at least one first electrically actuated brake caliper (10) connected with a first wheel (3) of the vehicle (2);

- providing at least one second electrically actuated brake caliper (20) connected with a second wheel (4) of the vehicle (2);

- providing an electronic device 30 for selecting and routing electrical signals, the electronic device comprising:

- first and second inputs (IN1 and IN2) receiving electrical signals (S1, S2) actuating the electrically actuated brake calipers (10, 20);

- first and at least one further first outputs OU1 and OU1′ connected respectively to the first and at least one further first electric motors RI and RE of such at least one first electrically operated brake caliper 10; );

- a second and at least one additional second output (OU2 and OU2') connected to a second and at least one further second electric motor (LE and LI) respectively of such at least one second electrically operated brake caliper (20); );

The method may include an electronic device 30 configured to perform any one of the above: a first output OU1, a second output OU2, at least one additional first output OU1' and at least one additional second output OU2'. selects and routes the aforementioned electrical actuation signals (S1, S2) towards two of said at least one first brake caliper (10) and said at least one third brake caliper (10) to produce a parking braking action in vehicle (2). characterized by comprising an additional step of activating the electric motors of both brake calipers (20).

In an exemplary embodiment, the method further comprises the following steps:

- first and at least further first electric motors RI and RE of the at least one first electrically operated brake caliper 10 , second and at least further first electric motors RI and RE of the at least one second electrically operated brake caliper 20 with 2 electric motors (LE and LI); applying at least a temporary parking brake action;

- permanent parking with at least one of the first, at least one additional first, second and at least one additional second electric motor (RI, RE, LE and LI), for generating a parking braking action on the vehicle 2; Applying the braking action, i.e. until deactivated by the user.

In an exemplary embodiment, the method includes:

- defining a first temporary braking action amount (F1), i.e., a first braking force;

- Defining a second permanent braking action amount F2, i.e., a second braking force.

Such a first temporary braking action amount F1 is smaller than the second permanent braking action amount F2.

In an exemplary embodiment, the above step of applying the at least temporary parking braking action further includes:

- a first and at least a further second electric motor, during a first time interval T1, to apply said first temporary braking action quantity F1 to the first and second electrically actuated braking calipers 10 and 20; activating (RI and LI);

- maintaining at least further first and second electric motors (RE and LE) in a deactivated state during the first time interval (T1);

- After the first time interval T1, during a second time interval T2 equal to the first time interval, a first temporary braking action amount F1 is applied to the first and second electrically operated brake calipers 10, 20 ), activating at least the first and second electric motors (RE and LE);

- maintaining the first and at least one further electric motor (RI and LI) in a deactivated state during a second time interval (T2).

In an embodiment, the step of applying a permanent parking brake action comprises applying a second permanent braking action amount F2 to the first or second electrically operated brake calipers 10 and 10 to generate a parking brake action on the vehicle 2 . 20) or at least one of the foregoing first, at least one further first, second and at least further second electric motors RI, RE, LE and LI, until deactivated by the user, to apply to all includes an additional step of activating

Moreover, it is provided to release the temporary parking brake action only from electric motors not related to the permanent parking brake action.

8, 9 and 10, an example of a hydraulic and electromechanical service and parking disc brake 200 comprising a monobloc brake caliper 101 is illustrated. Such a brake caliper 101 comprises two pistons actuated by two electric motors 117 controllable by an electronic control unit 120 . Such an electronic control unit 120 substantially corresponds to the electronic unit 50 described above, and can control the electric motor 117 through the electronic routing device 30 proposed in the present invention.

Although a monobloc hydraulic and electromechanical disc brake caliper 101 with two electric motors is shown in FIG. 8 , the present invention is also directed to a larger number of pistons, for example four or six pistons and a correspondingly larger number of pistons. It can be advantageously applied to hydraulic and electromechanical disc brake calipers that can have a large number of electrically actuated motors.

A hydraulic and electromechanical service and parking disc brake (200) includes a caliper (101) with two side walls (102) that mutually define a disc space (103) for receiving a portion of a braking disc (104).

Moreover, the disc brake 200 includes means for fixing the caliper 101 to the suspension of the vehicle and at least two pads 105 respectively supported on one of the side walls 102 .

The disc brake 200 includes a service brake system 106 with one hydraulic actuator 107 located on each side wall 102. Each of the two hydraulic actuators 107 shown in FIG. 9 has a hydraulic cylinder 108 formed on the side wall 102 and a piston 109 having a free end 110 received in the hydraulic cylinder 108 and facing the pad 105. ).

Such a hydraulic cylinder 108 applies hydraulic pressure to the piston 109 and causes the piston 109 to translate in the working direction 112 towards the brake disc 104 and clamps the pad 105 to the brake disc 104. system 111 for supplying and pressurizing hydraulic fluid for

Further, the disc brake 200 includes a service brake system 113 having electromechanical actuators 114 respectively located on respective sidewalls 102 . Caliper 101 includes two electro-mechanical actuators 114 .

Each electromechanical actuator (114) has a rotating member (116) and a translational member (115) and is configured to convert rotational motion of the rotating member (116) to translational motion of the translational member (115). (115, 116).

The screw-nut screw assemblies 115 and 116 are coupled to a hydraulic cylinder 108 to translate a translational member 115 relative to a piston 109 in an operating direction 112 to tighten and lock.

Each of the two electric motors 117 of the disc brake 200 is connected to a power supply 118 to operate screw-nut screw assemblies 115 and 116 connected to respective pistons. The disc brake 200 further includes a transmission mechanism 119 connected between the electric motor 117 and the rotating member 116 .

The electromechanical actuator 114 is automatic due to transmission irreversibility so that the translation deflection of the translation member 115 cannot move the translation member 115 backwards from the brake disk 104 when the electric motor 117 is off. It's worth noting that it's self-locking.

According to an alternative embodiment, the parking brake system 113 can be activated to block the pad 105 against the brake disk 104, for example in the case of calipers and so-called floating calipers, sidewall 102 ) may include a single electromechanical actuator 114 positioned on only one of the . In this case, a single electromechanical actuator 114 may be constructed as described above.

The electronic control unit 120 of the disc brake 200 is connected to the service braking system 106 to brake the parking system 113 and the user interface 121 . For example, such user interface 121 may include, for example, a service brake control interface, for example a user interface 122 with a service pedal or service button or service lever, and a parking brake control interface 123, for example For example, it includes a parking pedal or a parking button or a parking lever.

Such control unit 120 may include suitable electrical, electromechanical, electro-hydraulic and/or electronic control systems for controlling pressurization of hydraulic fluid and driving of electric motor 117 . Such control unit 120 is configured and/or programmed to perform the control function of brake 200 in a desired manner.

In the case of a hydraulic and electromechanical service and parking disc brake 200 comprising the brake caliper 101 of FIGS. 8 to 10 , the step of defining a pressure target value in the hydraulic circuit of the caliper 101 prior to the above-described control step is provided.

It is worth noting that hydraulic pressure can be generated by a vehicle's hydraulic modulator, eg, a stability control (ESC) modulator, or an electric power brake, or an electro-hydraulic actuator hydraulically connected to a caliper.

In particular, in response to a parking brake user command, the control unit 120 is configured to operate:

- a service brake system 106 in which the piston 109 moves in the operating direction 112 towards the brake disc 104 in the park position and the piston 109 clamps the pad 105 to the brake disc 104, and

- a parking brake system 113 which locks the piston 109 in the park position and prevents return movement of the piston 109

In response to a parking brake user command, the control unit 120 is configured as follows:

- move the piston 109 to the park position and the piston 109 presses the pad 105 against the brake disc 104 to activate the service brake system 106;

- when the target pressure is reached in the hydraulic circuit of the caliper 101, translate the translation member 115 relative to the piston 109 in the operating direction 112 so that the piston is locked in the parking position and prevents return movement of the piston by activating the electric motor 117 in the forward direction upon activation of the service brake system 106 and with the piston 109 already in the park position;

- Once the piston (109) is locked in the park position, reducing the pressure of the hydraulic fluid to deactivate the service brake system (106) and turn off the electric motor (117).

Thus, the piston 109 remains locked due to the transmission irreversibility of the electromechanical actuator 114.

In response to a user command to release the parking state, the control unit 120 is configured as follows:

- first actuating the hydraulic actuator (107) to provide pressure to the piston (109) and unloading the screw-nut screw assembly (115, 116) of the electromechanical actuator (114);

- when the screw-nut screw assembly (115, 116) is unloaded, actuating the electromechanical actuator (114) to separate the translating member (115) from the piston (109);

- When the translating member 115 is separated from the piston 109, activating the hydraulic actuator 107 again lowers the hydraulic pressure to block parking.

A possible parking brake assembly according to the present invention is described below with reference to FIGS. 3-7.

According to a typical embodiment, a parking brake assembly 1 of a vehicle 2 includes at least a first brake caliper 10 connected to a wheel 3 of a rear axle 5 of the vehicle 2 .

Moreover, the assembly comprises at least one additional first brake caliper 11 coupled with the wheel 4 of the front axle 6 of the vehicle 2 .

In an exemplary embodiment, all brake calipers 10 , 11 , 20 , 21 of braking system 1 of vehicle 2 are electrically actuated brake calipers to avoid hydraulic braking devices and circuits of vehicle 2 .

In a different exemplary embodiment, the braking caliper of the braking system 1 of the vehicle 2 is an electrically actuated braking caliper similar to that described with reference to FIGS. 8 to 10 , and a hydraulic and electromechanical service and parking brake caliper 101 ) includes all In the following, reference is made to an exemplary embodiment in which all vehicle brake calipers 2 are electrically actuated calipers, but the properties of the present invention are also applicable to hydraulic and electromechanical service and parking brake calipers 101 .

As a further advantage, both the first brake caliper 10 and the further first brake caliper 11 are also at least a parking brake caliper.

According to an embodiment, the system (1) comprises an electronic control configured to generate first and second electric parking command signals (S1, S2) for actuating the electrically operated brake caliper (10, 11, 20, 21). unit 50.

According to an embodiment, the electrically operated brake calipers 10, 11, 20, 21 and/or the electronic control unit 50 are configured to apply a constant parking action to the vehicle 2 even when the vehicle is parked. .

According to an embodiment, the electrically operated brake calipers 10, 11, 20, 21 and/or the electronic control unit 50 are configured to apply a constant parking action to the vehicle 2 even when the vehicle is parked and turned off. do.

According to an embodiment, each electrically operated brake caliper 10 , 11 , 20 , 21 has at least one electric motor RI , RE acting on a piston 61 , either directly or by means of a reducer 60 . , LE, LI, 12, 13, 14, 15), wherein the piston biases the brake pad 62 against the brake surface 63 of the brake disk 64 during a brake action.

Alternatively, said at least one electric motor RI, RE, LE, LI, 12, 13, 14, 15 is an electric motor RI, RE, LE, LI, 12, 13, 14 for vehicle 2. , 15) includes a motor locking device 65 (not shown) which acts by blocking movement of the electric motor when it is stopped; Alternatively, the reducer 60 is a non-reversible reducer, i.e. allows movement of the piston 61 when actuated by an electric motor RI, RE, LE, LI, 12, 13, 14, 15, but the piston The single deflection of this acting brake pad 62 does not allow the piston 61 to retract.

According to an embodiment, the at least one second brake caliper 20 is connected to the wheel 3 of the rear axle 5 of the vehicle 2 .

At least one additional second brake caliper 21 is connected to the wheel 4 of the front axle 6 of the vehicle 2 .

All four brake calipers 10, 11, 20, 21 of the braking system 1 of the vehicle 2 are electrically operated brake calipers.

The at least one electrically operated brake caliper 10 or 11 of the rear axle 5 and the at least one electrically operated brake caliper 20 or 21 of the front axle 6 also provide at least a parking control of the vehicle 2. It is also a brake caliper.

According to an embodiment, the at least two electrically operated brake calipers 10 and 11 of the rear axle 5 and the at least two electrically operated brake calipers 20 and 21 of the front axle 6 are at least also It is the parking brake caliper of the vehicle 2.

According to an embodiment, the at least one electrically actuated brake caliper 10 , 11 , 20 , 21 comprises at least two electric motors RI , RE , LE , LI 12 , 13 , 14 , 15 .

At least one of the at least two electric motors RI, RE, LE, LI, 12, 13, 14, 15 generates a parking action of the vehicle 2.

According to an embodiment, said rear axle (5) comprises two opposing rear wheels (3), each rear wheel (3) cooperating with at least one electrically operated rear axle caliper (10, 11). .

Each of the electrically-actuated calipers 10, 11 includes at least two electric motors RI, RE, LE, LI.

At least one of the at least two electric motors RI, RE, LE, LI9 of each of the electrically-actuated calipers 10, 11 generates a parking action of the vehicle 2.

According to an embodiment, the front axle 6 comprises two opposing front wheels 4 and each front wheel 4 cooperates with at least one electrically operated front axle caliper 20 , 21 . .

Each of the electrically-actuated calipers 20, 21 includes at least two electric motors 12, 13, 14, 15.

At least one of the at least two electric motors 12 , 13 , 14 , 15 of each of the electrically-actuated calipers 20 , 21 generates a parking action of the vehicle 2 .

According to an embodiment, the at least one electrically-actuated caliper 10 , 11 , 20 , 21 comprises at least two electric motors RI , RE , LE , LI 12 , 13 , 14 , 15 .

All of the at least two electric motors RI, RE, LE, LI, 12, 13, 14, 15 generate at least a temporary parking action of the vehicle 2.

According to an embodiment, the front axle 6 comprises two opposing front wheels 4 and each front wheel 4 cooperates with at least one electrically operated front axle caliper 20 , 21 . .

Each of the electrically-actuated calipers 20, 21 includes at least two electric motors 12, 13, 14, 15.

All of the at least two electric motors 12 , 13 , 14 , 15 of each of the electrically-actuated calipers 20 , 21 generate at least a temporary parking action of the vehicle 2 .

According to an embodiment, said rear axle (5) comprises two opposing rear wheels (3), each rear wheel (3) cooperating with at least one electrically operated rear axle caliper (10, 11). .

Each of the electrically-actuated calipers 10, 11 includes at least two electric motors RI, RE, LE, LI.

All of the at least two electric motors RI, RE, LE, LI of each of the electrically-actuated calipers 10, 11 generate at least a temporary parking action of the vehicle 2.

According to an embodiment, the front axle 6 comprises two opposing front wheels 4 and each front wheel 4 cooperates with at least one electrically operated front axle caliper 20 , 21 . .

The electrically-actuated front axle calipers 20, 21 are floating calipers.

Each of the electrically operated front axle calipers 20, 21 includes two electric motors 12, 13, 14, 15.

At least one of the at least two electric motors 12 , 13 , 14 , 15 of each of the electrically-actuated calipers 20 , 21 generates a parking action of the vehicle 2 .

According to an embodiment, the front axle 6 comprises two opposing front wheels 4 and each front wheel 4 cooperates with at least one electrically operated front axle caliper 20 , 21 . .

The electrically-actuated calipers 20, 21 of the front axle are either integral calipers or fixed against a support such as a vehicle stub axle.

Each of the electrically-actuated front axle calipers 20, 21 includes two opposing pairs of electric motors 12, 13, 14, 15.

At least two of the electric motors 12 , 13 , 14 , 15 of each of the electrically-actuated calipers 20 , 21 are disposed opposite each other to create a parking action of the vehicle 2 .

According to an embodiment, the rear axle 5 comprises two opposing rear wheels 3 , each rear wheel 3 cooperating with at least one electrically operated rear axle caliper 10 , 11 .

The electrically-actuated rear axle calipers 10, 11 are floating calipers.

Each of the electrically-actuated rear axle calipers 10, 11 includes a single electric motor RI, RE, LE, LI.

An electric motor RI, RE, LE, LI of each of the electrically-actuated calipers 10, 11 generates a parking action of the vehicle 2.

The procedure for activating the parking brake assembly will be described below.

According to a general embodiment, a method for parking braking of a vehicle 2 includes the following steps:

- providing at least one electrically-actuated first brake caliper (10) connected to a wheel (3) of a rear axle (5) of said vehicle (2);

- providing at least one additional electrically-actuated first brake caliper (11) connected to a wheel (4) of a front axle (6) of said vehicle (2);

- avoiding the hydraulic braking device and circuit of the vehicle 2;

- applying a parking brake action with both the brake caliper (10) and the additional first brake caliper (11), in order to generate a parking brake action in the vehicle (2).

According to a further embodiment, the method comprises the following steps:

- providing two opposing rear wheels (4) on said front axle (6), wherein each front wheel (4) cooperates with at least one electrically-actuated front axle caliper (20, 21);

- providing two opposing rear wheels (3) on said rear axle (5), wherein each rear wheel (3) cooperates with at least one electrically-actuated rear axle caliper (10, 11);

- Applying the parking brake action with both electrically operated calipers 20, 21 on the front axle and with both electrically operated calipers 10, 11 on the rear axle.

According to a further embodiment, the method comprises the following steps:

- providing at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) for each electrically-actuated caliper (10, 11, 20, 21);

- applying a parking braking action with at least one of said at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) to generate a parking braking action in said vehicle (2).

According to a further embodiment, the method comprises the following steps:

- providing at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) for each electrically-actuated caliper (10, 11, 20, 21);

- applying at least a temporary parking brake action with said at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15);

- apply a permanent parking brake action to at least one of said at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) to generate a parking brake action in said vehicle (2); That is, the step applied until deactivated by the user.

According to a further embodiment, the method comprises the following steps:

- providing at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) for each electrically-actuated caliper (10, 11, 20, 21);

- applying at least a temporary parking brake action with said at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15);

- apply a permanent parking braking action to at least one of said at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) to generate a parking braking action of said vehicle (2), i.e. applying until deactivated by the user;

- releasing the temporary parking brake action only from electric motors (RI, RE, LI, LE, 12, 13, 14, 15) not associated with said permanent parking brake action.

According to a further embodiment, the method comprises the following steps:

- defining a first temporary braking amount (F1);

- defining a second permanent braking amount (F2);

- providing at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) for at least one electrically-actuated caliper (10, 11, 20, 21);

- applying said temporary parking brake action (F1) with said at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15);

- activating the permanent parking brake action (F2) with at least one of said at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) to generate a parking brake action in said vehicle (2); applying, ie, until deactivated by the user;

- releasing the temporary parking brake action (F1) only from electric motors (RI, RE, LI, LE, 12, 13, 14, 15) not associated with said permanent parking brake action.

According to a further embodiment, the method comprises the following steps:

- defining a first temporary braking amount (F1);

- defining a second permanent braking amount (F2);

- the first temporary braking action amount (F1) is defined to be equal to half of the second permanent braking action amount (F2);

- providing at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) for at least one electrically-actuated caliper (10, 11, 20, 21);

- applying said temporary parking brake action (F1) with said at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15);

- activating the permanent parking brake action (F2) with at least one of said at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) to generate a parking brake action in said vehicle (2); applying, ie until deactivated by the user;

- releasing the temporary parking brake action (F1) only from electric motors (RI, RE, LI, LE, 12, 13, 14, 15) not associated with said permanent parking brake action.

According to a further embodiment, the method comprises the following steps:

- defining a first temporary braking amount (F1);

- defining a second permanent braking amount (F2);

- providing at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) for at least one electrically-actuated caliper (10, 11, 20, 21);

- applying said temporary parking brake action (F1) with said at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15);

- activating the permanent parking brake action (F2) with at least one of said at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) to generate a parking brake action in said vehicle (2); applying, ie until deactivated by the user;

- releasing the temporary parking brake action (F1) only from electric motors (RI, RE, LI, LE, 12, 13, 14, 15) not associated with said permanent parking brake action;

- at the end of parking, the permanent parking braking with at least one of the at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15) until the temporary parking braking action (F1) is achieved releasing action F2; and hereby

- releasing the temporary parking brake action (F1) with the at least two electric motors (RI, RE, LI, LE, 12, 13, 14, 15).

In order to meet additional specific requirements, a person skilled in the art may make many changes to the embodiment of the electronic device for selecting and routing the electrical signals that actuate the electrically-actuated calipers of the electric parking brake described above without departing from the scope of the following claims. and modifications may be made, or elements may be replaced by others that are functionally equivalent.

1 braking system 2 vehicle
3 rear wheel 4 front wheel
5 rear axle 6 front axle
10 1st electrically actuated brake caliper on rear axle
11 Additional first electrically actuated brake caliper on the rear axle
12 electric motor in front caliper
13 electric motor in front caliper
14 Additional electric motors in Proton calipers
15 Additional electric motors in Proton calipers
20 Second electrically operated brake caliper on front axle
21 Additional second electrically actuated brake caliper on the front axle
30 electronic devices
50 electronic control unit
60 Reducer 61 Piston
62 brake pad 63 brake surface
64 Brake disc 100 Parking brake
IN1 1st input IN2 2nd input
S1 first electrical signal S2 second electrical signal
CP1 1st power circuit CP2 2nd power circuit
OU1 primary output OU1' additional primary output
OU2 second output OU2' additional second output
1st electric motor of RI 1st rear caliper
Additional 1st electric motor of RE 1st rear caliper
LE 2nd electric motor in 2nd rear caliper
LI Additional 2nd electric motor in 2nd rear caliper
SW1 electrical connection means, first switch of switching control
SW2 electrical connection means, second switch of switching control
SW3 electrical connection means, third switch of switching control
SW4 electrical connection means, fourth switch of switching control
EN1 1st control signal EN2 2nd control signal
T1 first time interval T2 second time interval
100 parking brake
200 Hydraulic and Electromechanical Service and Parking Disc Brakes
101 monobloc brake calipers
102 sidewall 103 disk space
104 brake disc 105 pad
106 Service Braking System 107 Hydraulic Actuator
108 hydraulic cylinder 109 piston
110 free end
111 Hydraulic fluid supply and pressurization system
112 Operating direction 113 Parking brake system
114 Electromechanical actuators
115 translational member of screw-nut screw assembly
Rotating member of 116 screw-nut screw assembly
117 electric motor 118 power supply
119 transmission mechanism 120 electronic control unit
121 User Interface 122 Service Brake Control Interface
123 parking brake control interface

Claims (21)

An electronic device (30) for selecting and routing electrical signals for actuation of an electrically actuated brake caliper of a parking brake (100) of a vehicle (2), comprising:
- first and second inputs (IN1 and IN2) receiving electrical signals (S1, S2) actuating the electrically actuated brake caliper;
- a first and at least one further first output (OU1 and OU1') connected to a first electrically operated brake caliper (10) comprising at least two electric motors (RI, RE);
- a second and at least one additional second output (OU2, OU2') connected to a second electrically operated brake caliper (20) comprising at least two electric motors (LI, LE);
- electronic connection means (SW1, SW2, SW3, SW4) controllable to assume an open state and a closed state, wherein:
- when the parking brake 100 is deactivated, the electronic connection means (SW1, SW2, SW3, SW4) outputs the first and second inputs (IN1 and OU2') from the outputs (OU1, OU1', OU2, OU2'). IN2) is controlled to take an open state to disconnect;
- when the parking brake 100 is activated, the electronic connection means SW1, SW2, SW3, SW4 switch from an open state to a closed state, so that the first output OU1, the second output OU2, selectively controllable to couple the first and second inputs (IN1 and IN2) to any two of at least one additional first output (OU1′) and at least one additional second output (OU2′); ,
The electrical actuation signal (S1, S2) is routed towards a selected electric motor of an electrically actuated brake caliper. The method of claim 1,
The electronic connection means
An electronic device (30) for selecting and routing electrical signals, comprising first, second, at least one third and at least one fourth switch (SW1, SW2, SW3 and SW4) controlling the switching. The method of claim 2,
When the parking brake 100 is activated:
Each of the first and at least one fourth switch SW1 and SW4 switches from an open state to a closed state during a first time interval T1 to provide a first input IN1 to a first output OU1. and is controlled to connect the second input (IN2) to at least one additional second output (OU2');
The electronic device (30) for selecting and routing electrical signals, wherein the second and at least one third switch (SW2 and SW3) are controlled to assume an open state. The method of claim 3,
At the end of the first time interval T1:
The first and at least one fourth switch (SW1 and SW4) are controlled to switch from a closed state to an open state,
Each of the second and at least one third switch SW2 and SW3 switches from an open state to a closed state during a second time interval T2 after the first time interval T1, so that the first input IN1 ) to a second output (OU2) and to connect the second input (IN2) to at least one additional first output (OU1'). The method of claim 2,
When the parking brake 100 is activated:
Each of the first and at least one third switch SW1 and SW3 is switched from an open state to a closed state during a first time interval T1 to provide a first input IN1 to a first output OU1. and is controlled to connect the second input (IN2) to the at least one additional first output (OU1');
The electronic device (30) for selecting and routing electrical signals, wherein the second and at least one fourth switch (SW2 and SW4) are controlled to assume an open state. The method of claim 5,
At the end of the first time interval T1:
The first and at least one third switch (SW1 and SW3) are controlled to switch from a closed state to an open state,
Each of the second and at least one fourth switch SW2 and SW4 switches from an open state to a closed state during a second time interval T2 after the first time interval T1, so that the first input IN1 ) to a second output (OU2) and to connect the second input (IN2) to at least one additional second output (OU2'). The method of claim 2,
When the parking brake system 100 is activated, during the third time interval T3, the first, second, at least one third, and at least one fourth switch SW1, SW2, SW3 and SW4 are switching from the open state to the closed state, connecting the first input (IN1) to the first and second outputs (OU1 and OU2) simultaneously, and connecting the second input (IN2) to at least one additional first output (OU1') and an electronic device (30) for selecting and routing electrical signals, controlled to connect simultaneously to at least one additional second output (OU2'). In the parking brake device 100 of a motor vehicle,
- first and second electrically actuated brake calipers 10 and 20, where:
the first electrically actuated brake caliper (10) comprises a first and at least one additional first electric motor (RI and RE);
the second electrically actuated brake caliper (20) comprises a second and at least one additional second electric motor (LE and LI);
- an electronic control unit (50) configured to generate first and second electrical signals (S1 and S2) for actuating said electrically actuated brake caliper (10, 20);
- an electronic device (30) for selecting and routing electrical signals according to any one of claims 1-7;
The electronic device:
- first and second inputs (IN1 and IN2) receiving said first and second electrical operating signals (S1 and S2);
- a first and at least one additional first output (OU1 and OU1') connected respectively to a first and at least one further first electric motor (RI and RE) of the first electrically operated brake caliper (10);
- a second and at least one further second output (OU2 and OU2′) connected to a second and at least one further second electric motor (LE and LI) respectively of the second electrically operated brake caliper (20); A parking brake system (100) for a motor vehicle. The method of claim 8,
The motor vehicle is an automobile, and
The parking brake system (100) of a motor vehicle, wherein the first and second electrically operated brake calipers (10 and 20) are connected with a wheel of a rear axle of the vehicle. The method of claim 8,
The motor vehicle is an automobile, and
The parking brake system (100) of a motor vehicle, wherein the first and second electrically operated brake calipers (10 and 20) are connected with a wheel of a front axle of the vehicle. The method of claim 8,
The motor vehicle is a car,
The first electrically actuated brake caliper 10 is connected to a wheel of a rear axle of a vehicle, and
The parking brake system (100) of a motor vehicle, wherein the second electrically operated brake caliper (20) is connected to a wheel of a front axle of the vehicle. The method of claim 8,
The electronic control unit 50 is
Parking brake system (100) of a motor vehicle comprising first and second electronic power circuits (CP1 and CP2) of full-bridge transistor configuration, configured to generate said first and second electrical operating signals (S1 and S2). ). The method of claim 8,
- said first electrically operated brake caliper comprises first and further first electrically operated brake calipers (10 and 11) respectively connected to the wheel (3) of the rear axle (5) of the vehicle (2);
- the second electrically operated brake caliper comprises a second and a further second electrically operated brake caliper 20 and 21 connected respectively to the wheel 4 of the front axle 6 of the vehicle 2;
first and further first electric motors (RI and RE) respectively are connected with first and further first electrically actuated brake calipers (10 and 11);
A parking brake device (100) for a motor vehicle, wherein each of the second and further second electric motors (LE and LI) is connected with the second and further second electrically operated brake calipers (20 and 21). A motor vehicle comprising the parking brake device ( 100 ) for a motor vehicle according to claim 8 . In the parking braking method for a vehicle (2),
- providing at least one first electrically actuated brake caliper (10) connected to a first wheel (3) of said vehicle (2);
- providing at least one second electrically actuated brake caliper (20) connected with a second wheel (4) of said vehicle (2);
- providing an electronic device (30) for selecting and routing electrical signals;
The electronic device:
- first and second inputs (IN1 and IN2) receiving electrical signals (S1, S2) actuating the electrically actuated brake caliper;
- a first and at least one additional first output (OU1 and OU1') connected to the first and at least one further first electric motor (RI and RE) respectively of said at least one first electrically operated brake caliper (10); );
- a second and at least one additional second output (OU2, OU2') connected to a second and at least one additional second electric motor (LE and LI) respectively of said at least one second electrically operated brake caliper (20); ); including,
The above method
For the electronic device 30 to activate the electric motors of both the at least one first brake caliper 10 and the at least one second brake caliper 20 to generate a parking braking action in the vehicle 2, The electrical actuation signal (S1) towards any two of the first output (OU1), the second output (OU2), the at least one additional first output (OU1'), and the at least one additional second output (OU2'). , S2). The method of claim 15
- first and at least further first electric motors (RI and RE) of said at least one first electrically operated brake caliper (10), second and at least of said at least one second electrically operated brake caliper (20) applying at least a temporary parking brake action with a further second electric motor (LE and LI);
- permanent at least one of said first, at least one additional first, second and at least one additional second electric motor (RI, RE, LE and LI) for generating a parking braking action in vehicle 2; A method of parking braking for a vehicle (2), further comprising: applying a parking braking action, ie until deactivated by a user. The method of claim 16
- defining a first temporary braking action amount (F1);
- defining a second permanent braking action amount F2;
- The parking braking method for the vehicle (2), wherein the first temporary braking action amount (F1) is smaller than the second permanent braking action amount (F2). The method of claim 17
The step of applying the at least temporary parking brake action comprises:
- the first and at least a further second electric power, during a first time interval T1, to apply the first temporary brake action amount F1 to the first and second electrically operated brake calipers 10 and 20; activating motors (RI and LI);
- maintaining said at least further first and second electric motors (RE and LE) in a deactivated state during said first time interval (T1);
- a second time interval equal to and subsequent to the first time interval T1, for applying the first temporary braking action amount F1 to the first and second electrically operated brake calipers 10 and 20; during a two time interval (T2), activating said at least one first and second electric motor (RE and LE);
- maintaining said first and at least further second electric motors (RI and LI) in a deactivated state during a second time interval (T2). The method of claim 17
The step of applying the permanent parking braking action
By applying the second permanent braking action amount F2 to the first or second electrically operated braking calipers 10 or 20 or both the first and second electrically operated braking calipers, the parking braking action is applied to the vehicle 2 ), activate at least one of the first, at least one additional first, second, and at least one additional second electric motor (RI, RE, LE and LI), to be deactivated by the user. activating until;
- releasing the temporary parking braking action only from electric motors not associated with the permanent parking braking action; The method of claim 15
said at least one first electrically operated brake caliper (10) or at least one second electrically operated brake caliper (20) is a caliper (101) of a hydraulic and electromechanical service and parking disc brake (200);
The method is:
- defining and providing a pressure target value to the hydraulic circuit of the caliper (101);
In response to a user parking brake command,
- moving the piston 109 connected to the caliper 101 in the operating direction 112 towards the brake disc 104 in the park position so that the piston tightens the pad 105 against the brake disc 104, the disc brake ( activating the service braking system 106 of 200; and
- activating the parking brake system (113) which locks the piston (109) in the park position and prevents return movement of the piston (109); The method of claim 20
In response to a user parking brake command, the method:
- moving the piston (109) to the park position so that the piston presses the pad (105) against the brake disk (104), thereby actuating the service brake system (106);
- when the target pressure is reached in the hydraulic circuit of the caliper 101, translate the translation member 115 relative to the piston 109 in the working direction 112 so that the piston is locked in the parking position and prevents return movement of the piston activating the electric motor 117 in the forward direction upon activation of the service brake system 106 and with the piston 109 already in the park position;
- once the piston (109) is locked in the park position, reducing the pressure of the hydraulic fluid to deactivate the service braking system (106) and turn off the electric motor (117);
wherein the piston (109) remains locked due to transmission irreversibility of the electromechanical actuator (114).

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