Abstract: Disclosed are a parking brake system of an EMB used in combination with a hydraulic device, and a parking brake control method for an EMB. The parking brake system of an EMB according to an exemplary embodiment of the present invention includes: a pedal unit which has a configuration in which a pedal simulator and a master cylinder are coupled; electromechanical brakes (EMBs) each of which has a hydraulic piston device; first hydraulic lines which are connected so as to supply hydraulic pressure from the master cylinder to the hydraulic piston devices of the EMBs; first solenoid valves which are provided to change a communication state of the first hydraulic lines; second hydraulic lines which are extended between the first solenoid valves and the EMBs, and connected to a reservoir; and second solenoid valves which are provided to change a communication state of the second hydraulic lines.

Abstract: A master cylinder 5 includes: a first liquid chamber 51 generating a liquid pressure in response to a brake operation of a driver; and a second liquid chamber 52 communicated with a reservoir 4 and connected to a suction port 70 of a pump 7. In a state in which the reservoir 4 and a suction section 70 of the pump 7 are communicated via the second liquid chamber 52, a liquid pressure of the first liquid chamber 51 can create a wheel cylinder liquid pressure.

Abstract: A master cylinder including: a primary chamber; a first piston which is provided in the primary chamber, and has one portion that is moved to the outside of the primary chamber by pressing a pedal; a secondary chamber which is provided to be adjacent to the primary chamber; a second piston which is provided in the secondary chamber, and has one portion that protrudes to the outside of the secondary chamber and is provided to be spaced apart from the first piston at a predetermined interval; and a hydraulic line which connects the primary chamber and the secondary chamber, and is connected with a wheel cylinder, in which the first piston is moved by pressing the pedal, and after the first piston is moved at a predetermined interval, the first piston and the second piston come into contact with each other, and are moved together.

Abstract: A brake apparatus includes: a fluid pressure control valve; a fluid pressure pump; a feedback control circuit correcting a control power corresponding to a feedback control target rotation number of a motor and feed the corrected control power to a motor; a feed forward control circuit configured to feed, to the motor, a control power corresponding to a feed-forward control target rotation number of the motor; and an abnormal control fluid pressure generation control device, if a rotation number detector is abnormal, rotating the electric motor with the rotation number higher than the feedback control target rotation number by a margin rotation number, increases the brake fluid passing through the fluid pressure control valve, and changes the control current to be supplied to the fluid pressure control valve so that the wheel cylinder fluid pressure is not changed.

Abstract: A brake device for a vehicle, that includes at least a first hydraulic brake and a second hydraulic brake which produce hydraulic brake forces, and a regenerative brake which produces a regenerative brake force, and that performs a distribution of the hydraulic brake force and the regenerative brake force with respect to a driver request brake force.

Abstract: The invention relates to a method, wherein an electrically operated actuator of a vehicle brake system is controlled in accordance with a braking demand of a vehicle control system, such as occurs in electronic stability control. According to the invention, a supply voltage of the vehicle electrical system applied to the electrically operated actuator is increased if at least one specified condition is met. Thus, the pressure build-up by a hydraulic pump can e.g. be accelerated during emergency braking.

Abstract: A brake device for motor vehicles has at least two hydraulic brake circuits which are directly connected to a master brake cylinder, as well as an additional brake circuit, which is able to be actuated via a control device, independently of the master brake cylinder. Because of the separate hydraulic brake circuits in the region of the front axle, redundancy is provided, while the third brake circuit, that is able to be actuated independently of the master brake cylinder and typically acts on the rear wheels, during automatic actuation, permits taking into account a braking effect by additional active assemblies, such as a driven generator.

Abstract: A brake control device is provided that can reduce the driver's uncomfortable feeling even when operation amount detection means is broken down. When abnormality determination means 71 for determining abnormality of a pedal stroke sensor 3 determines that the operation amount detection means is abnormal, a predetermined regenerative torque is set to the generator (rotary electric machine) 9 upon sensing the pressing of a brake pedal by a stop lamp switch 4, and a predetermined maximum regenerative torque is set to the generator (rotary electric machine) 9 upon sensing the pressing of the pedal by a cruise control switch 42.

Abstract: The invention relates to an aircraft braking system having brakes with electromechanical braking actuators (103) adapted to press selectively against associated stacks of disks in order to generate a braking torque on associated wheels of the aircraft; at least one control module (130) receiving braking setpoints and responding by generating a braking command (121); and at least one power module (120) responding to the braking command by delivering AC power to the motors of actuators connected to the power module so that the motors develop a braking force corresponding to the braking setpoints. According to the invention, the control module includes a digital processor stage (131) and an analog processor unit (135).

Abstract: A valve arrangement for controlling a brake system, comprising at least one spring brake cylinder and at least one service brake cylinder, of a trailer vehicle of a traction vehicle-trailer combination, characterized in that said valve arrangement includes a 3/2 way valve which, as a function of the control pressure present at its control inlet, connects either its connection, which is connected to an outlet of a control valve device in order to generate service brake pressure for the at least one service brake cylinder, or connects its connection, which is connected to a trailer-vehicle-side compressed air supply, to its further connection which is connected to the at least one spring brake cylinder.

Abstract: A hybrid vehicle includes a braking device configured to apply a frictional braking torque to a vehicle wheel in response to movement of an input member of a brake pedal, an electric motor configured to apply a regenerative braking torque to the vehicle wheel, and a control unit. During braking, the control unit is configured to determine a limit value of the regenerative braking torque that can be generated in accordance with an operating condition of the charging device or the electric motor, and reduce a ratio of the regenerative braking torque to the frictional braking torque before the regenerative braking torque reaches the limit value.

Abstract: Disclosed are an electronic brake system and a control method thereof. The electronic brake system includes a master cylinder including a piston, an output rod contacting the piston, an input rod configured to be moved forward by a driver's manipulation of a brake pedal and arranged coaxially to the master cylinder and spaced a predetermined isolation gap apart from the output rod, an electrically-driven booster including a motor, a ball screw to move the output rod, and a motion converting unit to move the ball screw forward and backward by converting rotational movement of the motor into linear movement, and an electronic control unit (ECU) to control operation of the motor based on the size of the isolation gap. When the ball screw is moved backward in an ABS mode, the ECU stops backward-movement of the ball screw before the output rod collides with the input rod.

Abstract: A system for use in a vehicle with a brake pedal and a brake circuit. The system includes a master cylinder assembly configured to pressurize fluid therein in response to movement of the brake pedal, a sensor assembly configured to generate a pedal position signal indicative of position of the brake pedal, an electronic control unit configured to (i) generate a brake request signal in response to generation of the pedal position signal, and (ii) generate a selector control signal, and a selector valve assembly being moved from a first mode to a second mode in response to generation of the selector control signal, the master cylinder assembly is (i) isolated from fluid communication with the brake circuit when the selector valve assembly is positioned in the first mode, and (ii) in fluid communication with the brake circuit when the selector valve assembly is positioned in the second mode.

Abstract: A brake control apparatus obtains a required braking force using a hydraulic braking force in combination with a regenerative braking force. The brake control apparatus includes a hydraulic brake unit that controls the hydraulic braking force. When the deviation of an actual hydraulic pressure from a target pressure falls outside a permissible range (d), the hydraulic brake unit controls the actual hydraulic pressure in such a manner that the deviation falls within the permissible range. On the other hand, when the deviation is within the permissible range (d), the hydraulic brake unit maintains the actual hydraulic pressure. The hydraulic brake unit includes a control unit that detects timing (Ta) at which usage of the hydraulic braking force needs to be started to compensate for a deficiency from the required braking force, and that raises (r) the target pressure at the detected timing (ta).

Abstract: An electrically actuatable parking brake system for a pneumatic braking system includes a control valve device that has a control piston. The parking brake system can assume at least two operating states, namely a parked state or a driving state. The operating states can be assumed in a selective manner dependent on a position of the control piston, and the parked state is provided when the control piston is forced into an end position by the force of a spring that lies in a spring chamber. Leaked air that exits a ventilating connection of the control valve device can be returned into the spring chamber.

Abstract: A braking device for a vehicle is provided which includes a power fail-safe mechanism which works to create frictional braking force at a wheel of the vehicle in the event of loss of electric power. The braking device is equipped with an electromagnetic valve which is of a normally closed type. In the event of loss of electric power in the braking system, the electromagnetic valve is closed to block fluid communication between a hydraulic booster and a brake fluid reservoir, so that a stroke chamber in the hydraulic booster is hermetically closed. This enables the pressure in a master cylinder to rise in response to depression of a brake pedal to develop the frictional braking force.

Abstract: A retarding system for an electric drive machine is provided. The retarding system includes an electrical retarding system and a hydraulic braking system. A single pedal controls both the electrical retarding system and the hydraulic braking system. The pedal includes a first range of travel that provides input to the electrical retarding system and a second range of travel that additionally controls the hydraulic braking system. The pedal further includes different levels of travel resistance in each of the two ranges of travel that correspond to providing inputs to the electrical retarding system and the hydraulic braking system.

Abstract: A braking device for a vehicle is provided which includes a hydraulic booster to make wheels of the vehicle produce frictional braking force. The hydraulic booster includes a fluid chamber and a throttle. When a brake pedal is depressed suddenly, the throttle works to obstruct or restrict an outflow of brake fluid from the fluid chamber, thereby increasing the pressure in the fluid chamber. This causes the pressure in a master chamber of the hydraulic booster to rise, thereby producing the frictional braking force almost no later than start of the depression of the brake pedal.

Abstract: A braking device including a dissipative braking system, an electric braking system, and a first actuating device combined with the dissipative braking system. A second actuating device is combined with the electric braking system and a position sensor is combined with the second actuating device. This second actuating device is designed to drive the first actuating device after a non-zero travel from its inactive position, and the sensor is designed to drive the electric brake system according to the displacement travel of the second actuating device from its inactive position.

Abstract: A system and method for operating a hydraulic braking system) for motor vehicles with an electrically controllable pressure provision device), a high-pressure accumulator, which can be connected to the pressure provision device via a hydraulic connection), in which an electrically controllable shutoff valve is arranged, wheel brakes, which can be supplied with pressure medium by means of the pressure provision device and/or the high-pressure accumulator. An electronic control and regulating unit is provided for actuating the electrically controllable pressure provision device and/or the electrically controllable shutoff valve so as to regulate the hydraulic pressure which is provided by the pressure provision device and the high-pressure accumulator If a pressure buildup is carried out by activation of the pressure provision device, the high-pressure accumulator is connected only temporarily by at least partial opening of the shutoff valve.

Abstract: The invention describes a vehicle brake system having a vehicle brake arrangement (10), an electronic control unit (ECU) for controlling a vehicle brake arrangement (10), and an electric machine which can be operated as a motor and as a generator. The electronic control unit (ECU) is designed to control valves (30, 32, 34, 36, 38, 40) of the vehicle brake arrangement (10) and the electric machine in such a way that, when a brake pedal (12) is actuated, hydraulic fluid is supplied to a wheel brake (24a; 24b) from a master cylinder (16) via a feed line (20) in order to generate a brake pressure at the wheel brake (24a; 24b).

Abstract: A controllable brake booster and a method and a device for controlling the brake booster are disclosed. The pedal force that a driver must apply in order to convey an input element of the brake booster into an actuating position or to retain the element in an actuating position is adjusted by operating the brake booster.

Abstract: A method of performing a pump check for a brake system comprises determining a first position of a pump with a pump position sensor upon ignition of a vehicle. A pump motor is powered based upon a preselected operating condition. A second position of the pump is determined with the pump position sensor. The first position of the pump and the second position of the pump are compared. The pump motor is confirmed as operational when the second position of the pump is different from the first position of the pump.

Abstract: A brake device used in a vehicle employing a regenerative braking device for applying an electric braking force to road wheels, is provided with a first pump for sucking brake fluid from a master cylinder for generating a brake fluid pressure by a brake operation of the driver and for increasing a wheel-cylinder fluid pressure of a front-wheel system so as to generate a braking force, and a second pump for sucking the brake fluid from a reservoir, and for increasing a wheel-cylinder fluid pressure of a rear-wheel system so as to generate a braking force. Also provided is a brake control unit for calculating a distribution amount among the braking forces respectively produced by the first pump, the second pump, and the regenerative braking device in order to generate a required braking force depending on the brake operation by the driver.

Abstract: A railway vehicle brake system includes at least two relay valves in electrical communication with one another and in fluid communication with a brake pipe, at least two friction brake units in fluid communication with each relay valve, and at least one electric brake unit in electrical communication with each relay valve. Upon a failure of one of the electric brake units, the relay valve in communication with the failed electric brake unit sends a signal to at least one other relay valve to provide pressurized fluid to the at least two friction brake units in fluid communication with the at least one other relay valve. The at least two relay valves may include integrated electric relay valves. The at least two friction brake units may include disc brake units. Each relay valve may be positioned between and in fluid communication with the brake pipe and a main reservoir pipe.

Abstract: An electromagnetic pressure control module for a pressure-medium-actuated brake system of a motor vehicle, having at least two channels, the module being controlled electrically in undisrupted operation and pneumatically in the event of a fault in the electrics, and also from a method for operating the electropneumatic pressure control module.

Abstract: A control device for a recuperative braking system of a vehicle includes: an actuating device configured to (i) select the maximum value of a front axle generator braking torque and of a rear axle generator braking torque, taking into account at least one provided default variable concerning a setpoint total braking torque which is predefined by a driver, (ii) control an electric motor, and (iii) control a hydraulic front axle brake circuit component and a hydraulic rear axle brake circuit component in such a way that a front axle brake pressure and a rear axle brake pressure are settable in such a way that a difference between a predefined setpoint braking torque distribution and an actual braking torque distribution present between the front axle and the rear axle is minimized.

Abstract: A valve device is provided for a pneumatic brake system of a commercial vehicle and comprises a pilot piston, radial seals and at least one valve seat, which can be displaced in the direction of motion of the pilot piston.

Abstract: A braking system is provided for a commercial vehicle that can be pneumatically coupled to a trailer. The system includes at least one electronic control unit, and a valve device that can be electrically connected by the at least one electronic control unit. The at least one valve device builds up pressure for the trailer braking system when connected, causing the trailer to brake. A throttle is arranged in a trailer control line. The throttle limits a pressure drop at the control inlet of a relay valve in the event of a leakage downstream of the throttle. A method for controlling a brake system is also provided.

Abstract: Systems and methods are provided for restarting an engine that can be selectively deactivated during idle-stop conditions. In one embodiment, current is directed to a starter motor and an electric brake sequentially by limiting the current supplied to one while current is supplied to the other, an order of delivering the current based on a timing of a restart request relative to an electric brake request, as well as vehicle operating conditions at the time the requests were received. By coordinating the operation of a starter motor with the operation of an electric brake, loading of the engine system's electrical supply can be reduced.

Abstract: A brake system for a motor vehicle which simplifies the hydraulic design and avoids a vacuum prevailing over a relatively long period of time. The first hydraulic unit has a suction volume, which is connected to the suction side of the pump and which, in the event of a change in the pressure on the suction side of the pump, provides a pressure and volume equalization by means of the brake fluid stored in the suction volume, with an elastic element.

Abstract: A braking system for a vehicle is operative to apply a friction brake force to at least one wheel of the vehicle. The braking system includes a master cylinder is in fluid communication with a reservoir of brake fluid and in fluid communication with the hydraulic brake device. According to one aspect, the braking system includes an electric brake force generator which moves the brake fluid within the master cylinder to deliver brake fluid to the friction brake device in response to a first predetermined displacement of a brake pedal. The electric brake force generator includes a housing defining a boost chamber filled with brake fluid and in fluid communication with the reservoir of brake fluid and further includes a drive arrangement for creating pressure in the boost chamber.

Abstract: In a BBW type brake device, if a slave cylinder becomes inoperable, when a master cylinder is operated for the first time, a master cut valve is opened to charge brake fluid into a reservoir of a hydraulic modulator, and since the brake fluid charged into the reservoir is increased in pressure by driving a hydraulic pump when the master cut valve is closed, wheel cylinders are operated. Since the amount of brake fluid on the downstream side relative to the master cut valve is increased by charging the reservoir with brake fluid, it is possible to increase the pressure of the brake fluid of the reservoir by driving the hydraulic pump and generate brake fluid pressure by a hydraulic modulator that is higher than the brake fluid pressure generated by the master cylinder, thereby generating sufficient braking force without increasing the depressing force applied to a brake pedal.

Abstract: An apparatus is provided for a vehicle having components of a parking brake system and components of a service brake system. The apparatus comprises a normally-energized solenoid operatively coupled to components of the parking brake system and for, when de-energized, exhausting air pressure in at least some components of the parking brake system to set park brakes. The apparatus further comprises an electronic controller arranged to (i) monitor a combination of one or more signals indicative of a service brakes holding function, (ii) monitor a combination of one or more signals indicative of a fault condition, and (iii) provide one or more signals to de-energize the normally-energized solenoid to exhaust air pressure in at least some components of the parking brake system and thereby to set park brakes when both signals indicative of a service brakes holding function and signals indicative of a fault condition of the vehicle are detected.

Abstract: The electro-pneumatic latching valve system having an electrical switch unit that further includes an “apply” or “activate” switch, a “release” or “deactivate” switch, and a power supply. A first solenoid valve is in electrical communication with the activate switch and a second solenoid valve is in electrical communication with the deactivate switch. A pneumatic latching valve is in pneumatic communication with the first and second solenoid valves and a source of pressurized control and supply air is in pneumatic communication with the pneumatic latching valve and the solenoid valves. A terminal device, e.g., a spring brake, is in pneumatic communication with the latching valve, and the device is released or applied in response to pressurized supply air delivered to the device through the pneumatic latching valve in response to pneumatic control signals delivered to the pneumatic latching valve from the solenoid valves.

Abstract: A method for dimensioning the admission pressure at a first, analogized, electromagnetically actuated hydraulic valve for sensitively regulating the pressure in a pressure circuit in which the admission pressure at the first valve can be set by the delivery capacity of an engine pump assembly which is connected to the first valve via a pump-outlet-side pressure line, in particular in a hydraulic motor vehicle brake system, wherein the admission pressure is set by electronically evaluating the tappet reaction of the first valve or of a further hydraulic valve which is also actuated electromagnetically and is connected to the pump-outlet-side pressure line. An electronically controlled motor vehicle brake pressure control device with which the above method can be carried out is also described.

Abstract: A brake arrangement for a vehicle comprising a braking system arranged to vary hydraulic or pneumatic brake pressure that is arranged to apply a pressure to a brake calliper; an electric motor arranged to generate a braking torque that is applied to a first wheel when the electric motor is placed in a braking mode of operation, wherein the electric motor is arranged to vary brake torque generated when the electric motor is in the braking mode dependent upon a predetermined operating condition of the braking system.

Abstract: A foot valve that can be activated either by the driver or an electronic control unit, wherein the foot valve can be the central driving device for automated braking applications such as Hill Start Aid and Work Brake Systems. Pneumatic pressure delivered by an electronically controlled proportional modulator to the foot valve activates either primary and/or secondary portions of the brake valve. The driver can mechanically override the electronic intervention when he presses on the brake pedal. For applications such as ESC and ATC, driver demand can be sensed by sensors in the foot valve and transmitted to the braking system electronic controller on the vehicle.

Abstract: In a brake device for a motor vehicle having a first and a second hydraulic brake circuit, the second brake circuit is decoupled from the main brake cylinder in partial braking operations, and is operated with the aid of a pressure accumulator controlled by a control device, which takes an additional deceleration effect due to an active power component, e.g., a generator, into account.

Abstract: A method for demanding safety reactions for a rail vehicle having a plurality of appliances each able to demand a safety reaction when required, namely a braking process or a traction inhibit or both for the rail vehicle, includes: a) identification of a state in which one of the safety reactions should be carried out by one of the appliances, b) demanding the safety reaction by the appliance through a data bus, and c) feeding back information to the demanding appliance that the safety reaction has been carried out or intervening in a safety loop to initiate the desired safety reaction, if the safety reaction is not carried out.

Abstract: A method of decelerating a vehicle equipped with both regenerative powertrain braking from a motor/generator and friction braking from fluid pumped through a brake circuit. A deceleration demand is received, and regenerative braking torque is ramped up in response to the deceleration demand. The brake circuit is pre-charged during the ramping up of regenerative braking torque. Pre-charging the brake circuit includes pumping fluid to at least one wheel cylinder braking device to reduce the required pump speed and resulting noise for any subsequent braking demand on the brake circuit. The pump is actuated to operate at a predetermined speed that maintains noise and vibration below predetermined levels.

Abstract: The invention relates to a method for operating a brake boosted brake system of a vehicle, comprising the monitoring of a mode of operation of the brake boosted brake system with regard to agreement of a total braking torque applied to at least one wheel of the vehicle by the brake boosted brake system with a specified target total braking torque and/or with regard to a displacement of a brake medium volume of the brake boosted brake system to a force/pressure conversion element (22) of the brake boosted brake system, if a braking torque difference between the applied total braking torque and the specified target total braking torque is greater than a specified reference difference, and/or if the brake medium volume displaced to the force/pressure conversion element (22) is larger than a specified reference volume; further comprising the defining of a target boosting force change with regard to a boosting force (Fu) provided by a brake booster (14) of the brake boosted brake system, taking into account the br

Abstract: In a method for controlling an electronic parking brake system and an electronic parking brake system, a travel-optimized method is used to achieve the released state of the parking brake system. When the parking brake is applied, travel-force values are detected and a plausibility check is run, the values being used to arrive at a first optimized position when the brake is released. If the residual force applied to the brake exceeds a threshold value, the parking brake is released even more until the value remains just under the threshold value or until a maximum defined release travel is achieved.

Abstract: A vehicle braking system includes a master cylinder having first and second outputs. First and second hydraulic braking circuits are provided between the respective master cylinder outputs and respective hydraulic wheel cylinders. A first pump provided in the first hydraulic braking circuit is operable to generate pressure and move hydraulic fluid within the first hydraulic braking circuit. A second pump provided in the second hydraulic braking circuit is operable to generate pressure and move hydraulic fluid within the second hydraulic braking circuit. A valving arrangement establishes fluid communication between the first pump and the second hydraulic braking circuit in a first configuration and prevents fluid communication between the first pump and the second hydraulic braking circuit in a second configuration.

Abstract: A controlling device for a brake system, including a generator control device, by which a setpoint generator braking torque may be set regarding an actuating intensity of a manipulation of a brake actuating element; and a valve control device, by which, if the stipulated setpoint generator braking torque is equal to zero, at least one accumulator opening valve of a brake circuit may be forced into a first valve position in such a manner, that displacement of brake fluid from a master brake cylinder into at least one wheel brake caliper of the brake circuit may be effected and displacement of brake fluid from the master brake cylinder into an accumulator of the brake circuit is prevented. If the stipulated setpoint generator braking torque is not equal to zero, the at least one accumulator opening valve may be forced into a second valve position.

Abstract: A control device for a brake system of a vehicle includes a valve control device, using which, while taking into account a provided information signal with respect to a currently exerted or to be exerted generator braking torque of a generator, at least one high-pressure switching valve of a brake circuit of the brake system is able to be controlled into an at least partially opened state such that a brake fluid volume is able to be displaced from a main brake cylinder of the brake system into a storage chamber of the brake circuit via the at least one high-pressure switching valve that has been controlled into the at least partially opened state. Furthermore, a method for operating a brake system of a vehicle is described.

Abstract: For a motor vehicle, a compressed air preparation device includes a pressure line configured to conduct compressed air, a drying device disposed in the pressure line, a governor valve coupled to the drying device, and an electrically actuatable solenoid valve, the governor valve being (i) pilot controllable by the solenoid valve at a high pressure level to allow the compressed air to be fed through the pressure line when the solenoid valve is actuated and (ii) configured to control regeneration of the drying device in response to a low pressure level from the solenoid valve when an electrical supply to the solenoid valve fails.

Abstract: A vehicle brake system is provided with a hydraulic brake device, a regenerative brake device incorporating a generator motor, and a brake control device. The control device includes a section for calculating a driver target brake force for each wheel corresponding to a manipulation amount of a braking manipulation member, a section for enabling the brake control device itself to set compensation brake forces for respective wheels, a section for selecting a larger one of the driver target brake force and the compensation brake force for each wheel and for subtracting a base hydraulic brake force from the selected brake force to set differences for respective wheels as compensated target brake forces for the wheels, and a section for controlling the distribution of the compensated target brake force for each wheel to a controlled hydraulic brake force for each wheel and a regenerative brake force for each driving wheel.

Abstract: Vehicular motion control system comprising controller that independently controls driving force and/or braking force of each of four wheels and a turning direction sensor that senses a turning direction, and with an acceleration/deceleration command generator that generates an acceleration/deceleration command based upon a sensed steering angle and sensed vehicle speed and a driving force/braking force distributor that determines the distribution of driving force or driving torque and/or braking force or braking torque of each wheel, and driving force/braking force distributor determines based upon the acceleration/deceleration command and the turning direction so that more driving force or more driving torque and/or more braking force or more braking torque are/is distributed to the inside front wheel in turning than the outside front wheel in turning and more driving force or more driving torque and/or more braking force or more braking torque are/is distributed to the outside rear wheel.

Abstract: Disclosed is an electric disc brake capable of reducing noise and vibration while expanding the life span of the product. The electric disc brake includes a caliper housing to press friction pads provided at both sides of a disc against the disc, a cylinder installed in the caliper housing, a piston moving back and forth in the cylinder to press the friction pads, a driving device generating driving force with respect to the piston, and a volume compensation part communicated with the cylinder to compensate for an increment of a volume of the cylinder according to movement of the piston.