47 results about "Actuator torque" patented technology

An estimating method for transmitting torque of a dry type clutch in a vehicle, may include a slip determining step of determining by a processor whether only one clutch slips between an engine and a transmission, a transmitting torque estimating step of estimating a current transmitting torque of the dry type clutch by using a torque observer when the only one clutch slips as a result of performing the slip determining step, and an updating step of reflecting the current transmitting torque of the dry type clutch estimated in the transmitting torque estimating step and an actuator torque in the transmitting torque estimating step to a T-S (Torque-Stroke) curve.

The invention discloses a torque calibration testing device for an angular travel electric actuator. The torque calibration testing device comprises an overall support, motors, a force arm, pulley mechanisms, lead screws and weights. The angular travel electric actuator is connected with a driving hole in the middle of the force arm through an adapter driving sleeve, the lead screws and the motors are fixed to the force arm through the overall support, the force arm is connected with the overall support and can rotate by a certain angle around the center of the force arm, one ends of the pulley mechanisms are connected with the lead screws, the pulley mechanisms can move on the force arm under driving of the lead screws, and the other ends of the pulley mechanisms are connected with the weights. According to the torque calibration testing device, the lead screws can be driven by the motors to rotate to accordingly drive the weights to move on the force arm, the torque is accordingly adjusted, the trouble caused by the fact that the weights are continuously added or removed to adjust the torque is avoided, and therefore the testing efficiency is improved.

A vehicle steering control apparatus includes an actuator to vary a steering gear ratio of a vehicle wheel steer angle of a steerable wheel to a steering wheel angle. A controller controls the actuator to produce an actuator torque in a steering direction at a start of a driver's steering operation.

The invention discloses a comprehensive testing device for a rotary valve electric actuator. The comprehensive testing device comprises a base, a first cylinder, a second cylinder, an encoder, a movable friction disc, a fixed friction disc, a torque sensor and a coupler, wherein a mounting cavity is formed in the base, a mounting station for mounting an actuator is arranged at the top end of the base, a main shaft is arranged on the movable friction disc, the torque sensor and the main shaft are connected with an external actuator by means of the coupler, and the encoder is mounted on the movable friction disc, and the first air cylinder and the second air cylinder output alternately to generate variable pressure, so that the fixed friction disc generates variable friction forces on the movable friction disc, and the actuator is subjected to different torque. In the test process, the torque sensor tests the torque changes of the actuator, the encoder tests the rotation angle changes ofthe actuator, and the test values are compared with standards, so as to test whether the actuator is qualified or not. Through the arrangement, three key values of a valve can be tested at one time,the operation is convenient, and the efficiency is high.

The invention discloses a torque control system and method of an electric actuator. The torque control system of the electric actuator comprises a main control system, a signal processing circuit connected with the main control system, and a displacement detecting system connected with the signal processing circuit, and further comprises a motor driving circuit, wherein the displacement detecting system comprise a signal collecting circuit; the signal collecting circuit transmits electric signal change parameters to the signal processing circuit after converting measurable physical displacement variation into the electric signal change parameters, and the signals are transmitted to the main control system after being amplified and shaped by the signal processing circuit; the motor driving circuit receives a control instruction of the main control system to adjust the rotation of a motor. By the utilization of the non-contact detection on the displacement, torque of the electric actuator is detected and controlled in real time. A convenience and efficient mode is provided for research, development and production of electric actuators and valve electric device control systems, and the technological level of the electric actuator industry is improved and developed.

A driving power distribution device includes a propeller shaft that transmits the driving power generated by an engine, a differential device having a planetary gear device that is provided concentrically with the axial center of rotation of the propeller shaft, and a hydraulic motor fixed to the propeller shaft. The ring gear of the planetary gear device is coupled to the propeller shaft. The carrier is connected to a right rear wheel. The sun gear is connected to a left rear wheel. Inner pinions of the planetary gear device are driven by the hydraulic motor. Therefore, while the driving power generated by the engine is being distributed to the right and left rear wheels, a control of generating a desired torque difference or restricting the differential motion can be performed. Also, the actuator torque capacity can be reduced, so that size reduction of the device is made possible.

Discloses is an electric actuator torque protection device. The electric actuator torque protection device comprises a guide rod, two butterfly-shaped springs, a gear and a machine frame, wherein the two butterfly-shaped springs sleeve the guide rod, the two butterfly-shaped springs are separated through a connection block, a rack is further fixed on the connection block, the guide rod is fixed on the machine frame, radial motion of the two butterfly-shaped springs on the guide rod is limited by the machine frame, the gear is arranged on the rack in matching mode, travel switches are fixedly arranged in two moving directions of the rack, and the rack can touch a trigger of the travel switch when the rack moves in either direction. The electric actuator torque protection device is enabled to stably run due to the fact that common spiral springs are replaced with the butterfly-shaped springs, and simultaneously is high in moving accuracy due to the fact that an original slide block connection is replaced with a gear and rack motion transmission mode, and enables a person to directly observe numerical values on a display screen in torque running due to the fact that a potentiometer is added on the electric actuator torque protection device.

The invention relates to a method for operating a brake system, in particular for motor vehicles, comprising an electrically controllable pressure supplying device (20) for hydraulically actuating at least one brake (9), in particular a wheel brake. The pressure supplying device (20) comprises a cylinder-piston arrangement with a hydraulic pressure chamber (4), the piston (3) of the cylinder-piston arrangement being movable by an electromechanical actuator (1, 2) in order to generate a specifiable target pressure (PV, Soll) in the hydraulic pressure chamber (4). An actuator torque (MAkt), in particular a motor torque, and an actuator position (fAkt), in particular a motor angular position, of the electromechanical actuator (1, 2) are ascertained, and a pressure value (PV, Est, PV, IstB, PV, IstC) for the pressure (PV) in the hydraulic pressure chamber (4) is determined (30) using the actuator torque (MAkt) and the actuator position (fAkt) taking into consideration a pressure model.

The invention discloses a connecting rod transmission type front wheel turning anti-swing mechanism which comprises a turning actuator torque transmission mechanism, a planar connecting rod mechanismand a swing reducer. The turning actuator torque transmission mechanism comprises a turning actuator, a torsion bar, a second support and a first support, the turning actuator is connected with the front undercarriage outer cylinder through the second support and the first support, the piston rod of the turning actuator is movably connected with the rocker arm end of a torsion bar, and the bar body of the torsion bar is partially hinged to the second support and a third mounting connecting lug of the front undercarriage outer cylinder, and can rotate around the axis. The planar connecting rodmechanism comprises a double-lug connecting rod, a middle connecting rod, a front undercarriage ring body and a torsion arm, the double-lug connecting rod is connected with the bottom end of the torsion rod body part, an upper connecting lug of the double-lug connecting rod is hinged to the swing reducer, the lower connecting lug of the double-lug connecting rod is connected with one end of the middle connecting rod, and the other end of the middle connecting rod is connected with the front undercarriage ring body; the nfront undercarriage ring body is arranged on the front undercarriage outercylinder and can rotate around the outer cylinder, and one end of the torque arm is connected with the outer portion of the front undercarriage ring body.

An electric power steering (EPS) apparatus 1 includes a motor 12, an EPS actuator 10, a torque sensor 14, and an ECU 11. The EPS actuator 10 uses the motor 12 as a drive source to apply assist force to a steering system, thereby assisting a steering operation. The torque sensor 14 detects a steering torque τ of the steering system. The ECU 11 controls the operation of the EPS actuator 10. Based on the steering torque τ detected by the torque sensor 14, the ECU 11 computes a basic shift amount εts_b of the assist force applied to the steering system. The ECU 11 determines which one of returning, holding, and turning is the state of the steering operation. When the state of the steering operation is returning or holding, the ECU 11 executes compensation control for correcting the steering torque τ, which is used in the computation of the basic shift amount εts_b of the assist force, thereby increasing the assist force applied to the steering system. The ECU 11 subjects the steering torque shift control amount εts to a filtering process using a low pass filter, thereby inhibiting the steering torque shift control amount εts from sharply changing. When the state of the steering operation is turning, the ECU 11 changes a filter constant of the low pass filter so as to reduce the filtering effect.

The invention provides a torque and stroke measuring system for an electric valve and an actuator thereof. The system comprises the electric valve actuator, a fiber bragg grating sensor, an optical signal rotary coupling assembly and an upper computer, wherein the electric valve actuator comprises a worm and a worm gear, and an output shaft of the worm gear is connected with a valve rod of the to-be-measured valve; the fiber bragg grating sensor is buried into the outer peripheral surface of the worm in the axis direction of the worm, so that the central wavelength of the fiber bragg grating sensor periodically changes along with the rotation of the worm; a rotor outgoing line of the optical signal rotary coupling assembly is connected with a tail fiber of the fiber bragg grating sensor, and a stator outgoing line of the optical signal rotary coupling assembly is connected with a fiber bragg grating demodulator; and the upper computer is connected with the fiber bragg grating demodulator and is used for collecting the central wavelength of the fiber bragg grating sensor in real time. The invention further provides a corresponding measuring method. According to the system, the torque and stroke of the electric valve and the actuator thereof can be synchronously obtained by measuring the wavelength offset of a fiber bragg grating, the operation is simple and easy to conduct, the measurement precision is high, and the system has the functions of resisting electromagnetic interference and radiation and can be widely applied to the field of torque and stroke measurement of the electric valve and the actuator thereof.

The invention relates to a turbocharging electric control bypass valve structure design. The bypass valve structure comprises a bypass valve plate arranged on a turbocharger, an electric executer arranged on the turbocharger, a transmission mechanism connecting the electric executer with the bypass valve plate, and a spring generating pre-tightening force to the transmission mechanism. Due to thepre-tightening force generated through the spring, the bypass valve plate generates closing force. A brushless direct drive torque motor is preferably selected in the executer. By means of the turbocharging electric control bypass valve structure design, the mechanical gap of the bypass valve transmission mechanism can be effectively eliminated, and vibration abrasion, noise, lowering of reliability and shortening of the service life due to the gap are avoided. The executer torque and power requirements are lowered, and heat dissipation is reduced. Due to usage of the brushless direct drive torque motor, the reliability of the system can be greatly improved, and the service life of the system can be greatly prolonged.

The invention provides an over torque device of an electric actuator. The over torque device comprises a bracket, spring seats, springs, micro-switches, a cam and guide shafts, and further comprises a torque adjusting shaft, wherein the spring seats are symmetrically arranged on the two sides of the lower end of the bracket; the guide shaft sleeves into the middle lower end of the cam; the two ends of the guide shafts sleeve into the spring seats on the two sides respectively; the springs sleeve the guide shafts on the two sides of the cam; the corresponding spring seat sleeves one end of each spring and the lower end of the cam is convexly arranged at the lower end of the bracket; a thread end of the torque adjusting shaft is screwed into a bolt hole in the upper end of the cam; the two micro-switches are fixed on the two sides of the upper end of the bracket, are located above the torque adjusting shaft and are close to the two ends of the torque adjusting shaft; the cam is subjected to the force effect to do left and right reciprocating motion. The over torque device of the electric actuator has the beneficial effects that the over torque device can be used on a plurality of models of electric actuators by replacing the wire diameters of the springs; the aim that the power is cut off when the torque of the electric actuator is too great is realized by not moving the micro-switches and moving the torque adjusting shaft.

The invention discloses a quick opening and closing gate valve which comprises a valve body, a valve seat, a filler chamber seat, a valve cover, a transition mounting seat, an electric actuator, a valve rod, a valve clack, a circulation groove, a locking groove and a protruding part. A swing arm is hinged onto the protruding part and comprises a short arm and a long arm; the common end of the short arm and the long arm is hinged to the lower end of the valve rod; one end, away from the long arm, of the short arm is hinged with the protruding part; a hinge rod is hinged to the end, away from the valve rod, of the long arm; and the end, away from the long arm, of the hinge rod is hinged to the top of the valve clack. By means of the lever principle, when the maximum torque is needed at the moment of opening and closing, the force of the valve rod is completely used for opening and closing, after the valve clack is opened, a lever intervenes in work, the valve clack is pried to conduct the large stroke through the short stroke of the valve rod, and the purposes that under the condition that the torque of the actuator is not changed, the number of rotation turns is reduced, the stroke of the valve rod is shortened, and opening-closing time is saved are achieved.