72results about How to "Ensure braking force" patented technology

A vehicle brake system, capable of realizing a brake-by-wire construction which can be installed in vehicles in the same manner as conventional brake systems, is provided with a booster device, a master cylinder, wheel brakes, and a hydraulic pressure control device interposed between the master cylinder and the wheel brakes. The system is further provided with a stroke sensor for detecting the moving stroke of a brake pedal, a simulator for applying to the brake pedal a pseudo reaction force corresponding to the moving stroke of the brake pedal, a play or idling component arranged between the booster device and the hydraulic pressure control device for absorbing the moving stroke of the brake pedal by a predetermined amount, and an electronic control device for controlling the hydraulic pressure control device based on an input from the stroke sensor.

A running control device of a vehicle including an engine, a brake operation member, and a brake booster, is configured to execute an engine brake running mode performed with the engine coupled to wheels and an inertia running mode performed with an engine brake force made lower than that in the engine brake running mode. The running control device executes first and second inertia running modes. The first inertia running mode is terminated when a brake request amount becomes equal to or greater than a predefined first determination value while the first inertia running mode is performed. The second inertia running mode is terminated and a return to the engine brake running mode is made when the brake request amount becomes equal to or greater than a predefined second determination value larger than the first determination value while the second inertia running mode is performed.

An output of an internal combustion engine is transmitted to an output shaft by controlling a control motor to change a speed without speed steps, in a power distribution planetary gear. An output of a drive motor is input to the output shaft by changing the speed into two-step decelerated rotation by means of an automatic transmission. The transmission produces a desired torque by decelerating the speed in a large degree when a vehicle speed is low, and produces a desired number of revolutions by decelerating the speed in a small degree when the vehicle speed is high.

A vehicle brake mechanism and a method for controlling the vehicle brake mechanism. In a BBW brake mechanism, a driven cylinder having a single hydraulic with a simple structure is employed so as to realize the standby when one system in two brake systems is failed. A master cut valve 32 is closed and a connection control valve 41 is opened to make first and second liquid paths Pb, Qb connect with the driven cylinder 42, thereby simplifying the structure without a serial driven cylinder. When the power supply is failed, the master cut valve 32 is opened and the connection control valve 41 is closed. The brake hydraulic pressure generated by the first and second hydraulic chambers of the master cylinder 11 respectively drives the wheel cylinders 26, 27, 30, and 31 of the first and second systems to act. Herein, the brake force is guaranteed through the action of the other system even if one system in the first and second systems generates the liquid leakage defect because the first and second liquid paths Pb, Qb are separated.

Disclosed is a parking brake control device with which the necessary braking force can be ensured and be released reliably even when an automatic pressurization function, which can increase the W / C pressure regardless of brake pedal operation, is malfunctioning. If an ESC is malfunctioning during locking control or release control for a parking brake, a request to press a brake pedal is sent to the driver. Therefore, while the ESC is malfunctioning - that is, when the automatic pressurization function of a service brake is malfunctioning - the W / C pressure can be increased because the driver presses on the brake pedal. Thus, the required braking force can be ensured during locking control and can be released reliably during release control.

The invention relates to a composite brake system and a method, aiming at providing a composite brake system with matching of compressed air and friction braking of an engine and a method. The system comprises a compressed air braking system connected to a high-pressure gas storage tank by a high-pressure pipeline and further comprises a friction type braking system, wherein the high-pressure pipeline is provided with an electromagnetic valve; an electric control unit (ECU) is connected with a brake pedal sensor, a vehicle operating state sensor, a compressed air braking system, the friction type braking system and the electromagnetic valve respectively by signal lines. Compared with a traditional braking technology, in the invention, more energy can be saved, the damage to a friction brake is reduced in long-slope braking, the declining of the braking force is avoided, and the braking safety is improved; valve control can be realized, the adjustment of the size of the compressed air braking force can be realized, and the application range of working condition of the compressed air braking is expanded; and a lock braking function can be realized when the compressed air braking and the friction braking works separately or jointly, so that the stability of a vehicle braking system is improved.

Disclosed is a compact brake cylinder device which, while avoiding increases in the size of the device, is capable of increasing the braking force outputted from a brake output unit which moves together with a rod. A rod (22) is provided inside of a cylinder body (20) so as to freely move in the advancing and retracting directions of the cylinder shaft direction. A piston (24) partitions a pressure chamber (44) inside of the cylinder body (20), surrounding the circumference of the rod (22), and moves in a linear direction parallel to the movement direction of the rod (22). By supplying a pressure fluid to the pressure chamber (44), the piston (24) resists the biasing force of a biasing spring (23) and moves in the retracting direction relative to the cylinder body (20). At that time, a force-multiplication mechanism (25) converts the linear direction drive force generated by the piston (24) to a rotational direction, moves the rod (22) in the advancing direction, and multiplies the drive force from the piston (24) to act on the rod (22). A brake output unit (21) moves together with the rod (22) in the advancing direction and outputs a braking force.

The invention discloses a mechanical interlocking type parking brake for a railway vehicle. The mechanical interlocking type parking brake comprises a brake cylinder assembly and a mechanical interlocking mechanism, wherein the brake cylinder assembly comprises a cylinder body, a piston, a piston rod and a release spring; the mechanical interlocking mechanism comprises a locking base also used as a cylinder cover, the piston rod extends out of the locking base to be connected with a regulating shaft of a vehicle brake device, the locking base is internally provided with a locking nut rotating along the circumferential direction of the piston rod and a locking shaft sleeve moving along the axial direction of the piston rod, a rest spring by which tow end faces of the locking shaft sleeve and the piston rod are in butt joint is arranged between the locking shaft sleeve and the piston rod, a friction pair meshed face is formed at the joint of the end faces of the locking shaft sleeve and the piston rod, and a compressed air flange connector is connected with a vehicle main air pipeline is arranged in the side wall of the locking base, and is communicated with one side of the locking shaft sleeve, which is close to one side of the locking nut. The mechanical interlocking type parking brake is used for combining travelling brake and parking brake of the vehicle into a whole, is capable of automatically starting the parking brake and keeping a brake force until the brake release is started if necessary, and has the characteristics of uniform brake force, short parking brake time, safety in operation of the vehicle, and the like.

The invention discloses a method for lifting and releasing a descending mechanism through an intelligent winch device. The method comprises the following steps that an information acquisition elementis arranged on an output shaft of a winding drum, the movement speed and position information of a load vehicle which is lifted through the winding drum are acquired; a caliper disc brake is arrangedon the output shaft of the winding drum; a plurality of hydraulic oil ports of the caliper disc brake are connected with a hydraulic system provided with an electromagnetic overflow valve, a proportional pressure reducing valve and an electromagnetic reversing valve correspondingly; the hydraulic system, the information acquisition element and the control system are connected correspondingly, thecontrol system is enabled to control one or more of the electromagnetic overflow valve, the proportional pressure reducing valve and the electromagnetic reversing valve to act according to the movement speed and the position of the load vehicle, the oil supply pressure of the hydraulic system to the caliper disc brake is adjusted so as to adjust the brake torque of the caliper disc brake to the load vehicle. According to the method, the caliper disc brake directly brakes the output shaft of the winding drum, the brake torque is large and adjustable, so that the caliper disc brake is suitable for braking the large load, and the speed reducing and braking effects on the load vehicle are improved.

The invention discloses an air brake pressure control system and a brake control method. The system comprises an air inflation electromagnetic valve, an exhaust electromagnetic valve, a pressure sensor, a detection module, a pressure control unit and a controller, wherein controller comprises a learning record module and an abnormal control module. According to the brake control method, a synchronous learning and a recording control strategy of the learning record module is utilized, when signals of the pressure sensor are abnormal, the abnormal control module calls the control strategy of thelearning record module, and the air inflation electromagnetic valve or the exhaust electromagnetic valve is controlled to gradually reach the target pressure according to the corresponding control strategy. Compared with a certain fixed state that a control electromagnetic valve is in the normal power or normal power loss, the pressure of a pressure chamber to be controlled is more accurate.

The invention discloses a power failure brake. The power failure brake comprises a magnetic yoke with a coil groove inside; a magnet exciting coil is arranged in the coil groove; a gag bit is positioned on the inner end surface of the magnetic yoke; one end of the magnetic yoke is connected with a cover plate; a middle body connected with a transmission block is arranged between the cover plate and the gag bit; friction bodies are arranged at two ends of the middle body; multiple spring bases and elastic pin bases are arranged on the inner end surface of the magnetic yoke; springs are mounted in the spring bases; elastic pins are mounted in the elastic pin bases; and one ends of the elastic pins are fixed on the elastic pin bases. The power failure brake is small in size, reasonable in layout, excellent in braking performance and high in environment adaptability.

The invention discloses an elevator guide rail fixing component used for high-speed and high-rise elevator cars. Positioning plates located on both sides of the elevator guide rail are arranged at the bottom of the pressure guide plate, which can prevent the movement of the elevator car guide rail in the X-axis direction. The bottom of the fixing bolt of the fixed pressure guide plate is sleeved with a fixed collar, and a strong compression elastic washer is nested in the fixed collar, so that the elevator guide rail of the elevator car can freely expand and contract in the vertical Z-axis direction under the action of natural force, ensuring that the building The safety of objects and elevator shaft installation parts and elevator guide rails, as well as the assembly accuracy of the elevator, ensure that the elevator guide rails can withstand impulse and braking forces, especially for high-speed, high-rise elevator cars, and have a good application prospect.

The purpose of the present invention is to further improve fuel economy while ensuring amplification of braking force upon brake operation in a vehicle capable of coasting in a state in which there is less engine-braking force than when traveling with engine braking. Free-run coasting, which produces excellent fuel efficiency by traveling with the engine (12) stopped, is maintained until a brake-pedal force (Brk) reaches a first threshold (α), and coasting in neutral, which produces appropriate amplification of the brake-pedal force (Brk) via a brake booster (42) by traveling with the engine (12) still running, is maintained until a second threshold (β) that is higher than the first threshold (α) is reached. This makes it possible, relative to the use of only free-run coasting or only coasting in neutral, to further improve overall fuel economy while ensuring that brake operation produces a sufficient vehicle-braking force.

An object of the present invention is to provide an eddy current type speed reducer capable of securing braking capability and preventing leakage of magnetic force. In a preferred embodiment of the present invention, the eddy current reducer (1) includes a first magnet ring ( 18), and the second magnet ring (7) that is arranged opposite to the first magnet ring (18) and includes a plurality of permanent magnets (10) spaced along the circumferential direction, wherein the second magnet ring (7 The magnetic force of each permanent magnet (10) of ) is set to be greater than the total of one or more permanent magnets (16) of the first magnet ring (18) used as a cooperating part of the magnetic circuit in the braking stop state magnetic force. As a result, the magnetic flux leakage to the brake rotor (3) during the braking stop can be almost zero.

The invention relates to an electronic hydraulic pressurization system and a control method. The electronic hydraulic pressurization system comprises a pressurization power source module, a pressurization transmission module, a brake main cylinder module and an electronic control unit, wherein the output end of the pressurization power source module is connected with the brake main cylinder modulethrough the pressurization transmission module, and the pressurization power source module achieves switching or superposition of pressurization torque through the pressurization transmission module;the electronic control unit controls output of the pressurization power source module and switching and mixing of the pressurization transmission module, and the brake main cylinder module is used for feeding back pressure signals to the electronic control unit. Two motors of the pressurization power source module are subjected to torque coupling through a planetary gear mechanism and output through a gear ring. The pressurization transmission module adopts a ball screw mechanism, and the gear ring is in threaded engagement with the outer circumference of a ball screw nut; and three driving pressurization modes are achieved through cooperation of two locking mechanisms and the two pressurization motors in terms of rotating speed and torque. It can be guaranteed that the pressurization capacity is still achieved when the first pressurization motor breaks down and fails.

The invention relates to the field of automobile brake systems, and discloses an air pressure EBS of a dangerous goods semi-trailer transport vehicle. The air pressure EBS comprises an EBS ECU, an automatic pressure regulating valve, a pressure differential meter, a front brake air chamber, an electric control brake master valve, a double-cavity brake air chamber, a wear sensor, a rotating speed sensor, a steering tire pressure sensor and an emergency cut-off valve control pipeline pressure sensor. The brake air chamber is sequentially connected with the automatic pressure regulating valve, the electric control brake main valve and an air tank through pneumatic pipelines, and the pressure differential meter is installed on the brake air chamber. A semi-trailer braking hand brake is independently and additionally arranged and used for controlling the braking force of the semi-trailer under the condition that EBS electronic control fails; aiming at the national requirements of the dangerous goods semi-trailer transport vehicle, the tire burst emergency safety device and the emergency cut-off valve are incorporated into the EBS monitoring range, and the air pressure EBS has importantsignificance for the safety improvement of the dangerous goods semi-trailer transport vehicle.

The invention relates to a brake-by-wire system with complete failure operation capacity and a vehicle. The brake-by-wire system comprises a first motor system, a second motor system, a first clutch device, a second clutch device and a transmission mechanism. The first motor system is isolated from and combined with the transmission mechanism through the first clutch device; the second motor system is isolated from and combined with the transmission mechanism through the second clutch device; power of the first motor system and the second motor system is cut off or output, so that the first motor system and the second motor system share the transmission mechanism to achieve brake-by-wire. When the motor in the brake-by-wire system fails, the power system can be quickly switched, and the brake capacity of the brake system is maintained.

The invention discloses a control method and device for switching of wired electric control air brake and electric pneumatic brake. When a switching request for switching a train brake system between a wired electric control air brake system and an electric pneumatic brake system is received, brake force is applied to a train at first, and braking force is kept in the switching process, so that the train braking effect can be kept in the switching process, stability of switching of braking control power between the wired electric control air brake system and the electric pneumatic brake system can be ensured, and safety switching between the fired electric control air brake system and the electric pneumatic brake system can be achieved.

The invention discloses an electronic brake booster. The electronic brake booster comprises a motor and a boosting transmission device, wherein the boosting transmission device is driven by the motor and is provided with a rotary / translation conversion transmission mechanism; and the conversion transmission mechanism is used for converting motor rotating drive motion into output motion of translation for operating a brake system. The electronic brake booster is characterized in that the conversion transmission mechanism comprises a thread screw rod and a tooth-formed transmission belt; the thread screw rod comprises a nut and a screw rod; and the motor is in transmission connection with the nut through the tooth-formed transmission belt. By adopting the combination of the thread screw rod and the tooth-formed transmission belt, the motor rotating drive motion is converted into output motion of translation for operating the brake system, so that the cost is effectively reduced, and the transmission torque is increased; and the thread screw rod has a self-locking function, and the thread screw can be fixed to keep on braking in the process of keeping brake force even the motor is interrupted.

A regenerative control unit performs regenerative control to perform electric power regeneration. When regenerative control is performed, a valve control unit controls a VVL device to limit an upper limit of at least one of an amount of lifting an intake valve and a working angle on the intake valve to be lower than when regenerative control is not performed. As a result, a hybrid vehicle allowing a power storage device to be charged in regenerative braking, can ensure engine braking force and also minimize degradation of the power storage device.

A rice-planting machine including an auxiliary brake mechanism for stopping the machine body, which auxiliary brake mechanism is operatively associated with a clutch mechanism installed in a power transmission path extending from a prime mover to a running section, wherein a transmission case is operatively connected to the engine through the clutch mechanism, an axle case is operatively connected to the transmission case, and a pair of wheels are operatively connected to the axle case, thereby forming a power transmission path to transmit the engine power from the engine to the wheels, the auxiliary brake mechanism being located in the power transmission path downstream of the transmission case. Thus, even if the transmission case is held neutral, the rotation of the front and rear wheels can be stopped by the auxiliary brake mechanism, enabling the machine body to be reliably kept stopped even on an inclined surface such as a slope.

The invention relates to an active braking system applied to an unmanned formula car. The active braking system comprises a first braking main cylinder, a second braking main cylinder, a third brakingmain cylinder, a fourth braking main cylinder, a braking pedal, a first two-position three-way electromagnetic valve, a second two-position three-way electromagnetic valve, a control system, a linearmotor and the like. Two sets of acting main cylinders are adopted, independent braking functions in an unmanned mode and a driver driving mode are achieved by switching a braking loop through an electromagnetic valve, the scheme is different from a traditional scheme that a brake pedal used in the driver driving mode is compressed through a mechanical transmission structure, and switching of theacting main cylinders and the braking loop in different driving modes is achieved. The two sets of acting main cylinders are more flexible in arrangement mode, can be arranged outside a front cockpitand are suitable for FSAC racing cars with narrower space and more compact structures, so that the problems of mutual interference of active and passive modes, shortage of arrangement space and the like are solved; the linear motor can quickly drive the braking main cylinders through a DCDC converter, so that the racing car is braked emergently, and the EBS function is achieved.

The invention discloses a control method and device for switching of wired electric control air brake and electric pneumatic brake. When a switching request for switching a train brake system between a wired electric control air brake system and an electric pneumatic brake system is received, brake force is applied to a train at first, and braking force is kept in the switching process, so that the train braking effect can be kept in the switching process, stability of switching of braking control power between the wired electric control air brake system and the electric pneumatic brake system can be ensured, and safety switching between the fired electric control air brake system and the electric pneumatic brake system can be achieved.

The invention discloses a hand brake for a railway wagon. The hand brake comprises a base, a box cover, a rolling chain wheel mechanism, a driving shaft mechanism, a hand wheel mechanism and a handle mechanism. The rolling chain wheel mechanism is arranged below a containing cavity defined by the base and the box cover. The driving shaft mechanism is arranged above the rolling chain wheel mechanism and used for driving the rolling chain wheel mechanism to rotate in the forward direction or the reverse direction, one end of the driving shaft mechanism is rotationally installed on the base, and the other end of the driving shaft mechanism penetrates out of the box cover to be connected with the hand wheel mechanism; the handle mechanism is arranged above the driving shaft mechanism and used for driving the driving shaft mechanism to rotate. According to the hand brake for the railway wagon, the chain output force is large, the development requirement of heavy-duty wagons is met, the driving shaft mechanism is of an integral structure, it is guaranteed that axial movement cannot occur in the rotating process of the driving shaft, and stability and reliability are achieved.

The embodiment of the invention provides a brake, a passenger cable car braking system and a braking method, and relates to the technical field of cable car braking. The brake provided by the embodiment of the invention comprises a bracket, a sliding sleeve, a friction disc, an oil cylinder and a disc spring, the sliding sleeve is slidably arranged on the support, and the friction disc is fixedly connected to the sliding sleeve, so that the friction disc moves relative to the support along with the sliding sleeve. The oil cylinder is arranged at the end, away from the friction disc, of the sliding sleeve, pulling force pointing to the oil cylinder from the friction disc is applied to the sliding sleeve through the oil cylinder, the oil cylinder and the friction disc are located at the two ends of the sliding sleeve respectively, hydraulic oil leaked from the oil cylinder cannot flow to the friction disc, and the friction braking performance of the friction disc is guaranteed. Meanwhile, the oil cylinder comprises a cylinder sleeve and a piston, the cylinder sleeve is movably connected with the support, the pre-pressure of the disc spring is adjusted through movement of the cylinder sleeve relative to the support, it is guaranteed that the braking force of the brake meets the requirement, and then the braking effect of the brake is guaranteed.

The invention relates to a composite brake system and a method, aiming at providing a composite brake system with matching of compressed air and friction braking of an engine and a method. The system comprises a compressed air braking system connected to a high-pressure gas storage tank by a high-pressure pipeline and further comprises a friction type braking system, wherein the high-pressure pipeline is provided with an electromagnetic valve; an electric control unit (ECU) is connected with a brake pedal sensor, a vehicle operating state sensor, a compressed air braking system, the friction type braking system and the electromagnetic valve respectively by signal lines. Compared with a traditional braking technology, in the invention, more energy can be saved, the damage to a friction brake is reduced in long-slope braking, the declining of the braking force is avoided, and the braking safety is improved; valve control can be realized, the adjustment of the size of the compressed air braking force can be realized, and the application range of working condition of the compressed air braking is expanded; and a lock braking function can be realized when the compressed air braking and the friction braking works separately or jointly, so that the stability of a vehicle braking system is improved.

Method and thread brake comprising a first brake element (40), a second brake element (60) and at least one actuator (41; 84, 85), wherein the first brake element (40) is displaceable and can be forced against the second brake element (60) by the at least one actuator (41; 84, 85) in order to brake a thread (3, 4, 5), and wherein the second brake element (60) is of flexible and elongate design and is distributedly supported along its length by a spring system (61).