34results about How to "Reduced torque loss" patented technology

The invention discloses a pre-tensioned track board assembly-unit production tooling device and method. The tooling device comprises a track board mould, tensioning rods, tensioning devices, a pouring device, a rapping device, a steam curing device, relieving devices and demoulding devices. By adoption of the pre-tensioned track board assembly-unit production tooling device, the mould capable of being used repeatedly and apparatus which is used for tensioning, relieving and demoulding a track board and adapts to the mould are adopted for production of the track board, the track board can be jacked up from the bottom of the mould, the mould is separated from the track board, and the purpose that the mould is fixed and not detached in use is achieved. Compared with an existing technical concept, the tooling device is advanced, the mechanization degree is high, manpower demand amount in the track board production process is decreased, and the track board production efficiency is improved; and due to the fact that the used mould does not need to be separately closed or detached before and after each track board is produced, the uniformity of produced track boards by means of the mould is good.

To provide a multi-way selector valve properly used for a vehicle, with a smooth flow path switching operation even in case of a large pressure difference between the inside and outside of a valve body, a reduced refrigerant passing noise at a time of switching a flow path, and an easy flow path switching operation, the multi-way selector valve includes a valve body 50 rotated by a flow path switching actuator 15, and a valve main body 60 rotatably holding the valve body 50, the flow path switching actuator is a stepping motor 15 including a rotor 16 placed on the inner peripheral side of a can 38 and a stator 17 placed on an outer periphery of the can 38, and a planetary gear type speed reduction mechanism 40 is inserted between the rotor 16 of the stepping motor 15 and the valve body 50.

The invention discloses a guide wire. The guide wire comprises a far end (1), a near end (2) and a core wire (3), the core wire (3) is arranged in the guide wire and extends to the far end (1) from the near end (2) of the guide wire, and a safety net (4) is arranged at the head end, located at the far end (1), of the core wire (3) and fixedly connected with the head end. The invention further provides a preparation method of the guide wire. Accordingly, by additionally arranging the safety net at the head end, located at the far end, of the core wire, the cross section area of the guide wire far end is increased, the loss of guide wire toque force and torque transmission is reduced, and the flexibility and deformation resistance of the guide wire far end are guaranteed while the drifting phenomenon is eliminated.

Provided is a clutch release bearing whose water resistance is improved. A first sealing member (40) externally fitted to an outer ring (20) is disposed on the side opposite to the side, in an axis direction, on which an outer ring collar (22) of a clutch release bearing (10) is provided. A seal lip (44) that is in sliding contact with an outer-diameter surface (32) of an inner ring (30) is disposed at the end of the first sealing member (40) in an inner radial direction. A ring-shaped guide (50) is disposed on the bearing outer side of the first sealing member (40). An axial lip (46) that extends in the outward direction of the bearing to the radially outer side of the guide (50) is formed on the side face of the first sealing member (40) on the bearing outer side. The axial lip (46) andthe guide (50) are in non-contact close proximity and form a labyrinth. A groove (47) opening radially outward is formed at a joint portion of the axial lip (46) to the first sealing member (40).

The invention relates to an active safety belt retractor with a dynamically adjustable force limiting working condition and a speed reducing mechanism. The retractor comprises a frame and a mandrel, a speed reducing mechanism is mounted at one end of the mandrel; a motor is mounted at the outer end of the speed reducing mechanism; a braid is wound on the periphery of the mandrel; a controller is arranged on the frame; the controller generates different output signals according to different working condition states, the output signals trigger the motor to rotate and output torque, the speed reducing mechanism receives the output torque of the motor, then decelerates and increases the torque, and then transmits the torque to the mandrel and the fixed shaft, so that the woven belt force on the mandrel is controlled. The advantages are shown in the specification; through cooperation of the controller, a motor and the speed reducing mechanism, the speed reducing mechanism can rotate forwards and backwards, the braid force in the process of each working condition state is dynamically adjusted in real time in a targeted mode, meanwhile, the coaxial arrangement mode is adopted, the structure is simple and compact, the motor driving efficiency is high, the speed reducer transmission efficiency is high, the mechanism is simple, and the cost is lower.

The invention provides vehicle transmission operation. A system includes a computer including a processor and a memory, the memory storing instructions executable by the processor to plan a pluralityof vehicle speeds for an upcoming road segment, adjust one or more of the planned speeds based on a predicted torque loss including a penalty based on a predicted torque impeller speed, and actuate apropulsion according to the planned speeds to lock a torque converter clutch.

The invention discloses a vector stepless flux weakening method of a permanent magnet synchronous motor. A problem that characteristics of the permanent magnet synchronous motor cannot be fully exerted is solved. A high-speed strategy is expanded; the stability of deep weak magnetism is improved; the torque loss in dynamic adjustment is reduced; a voltage feedforward module is carried out by usingthe current after the compensation voltage table lookup; along with the increase of the rotating speed, the stability of the system is improved, quick, stable and dynamic response can be realized during high-speed flux weakening, the torque loss is small, the torque loss is avoided, the characteristics of the permanent magnet synchronous motor are brought into full play, and the motor is ensuredto stably operate in a deep flux weakening region, and the method is quick in dynamic response, high in robustness, simple and easy to operate.

The invention discloses a tension holding structure of a prefabricated track plate prestressed tendon. The tension holding structure includes a first gear, a second gear, a first driving component, asecond driving component, a connecting seat, a guide rail, an elastic component, and tension rods connected to the two ends of the prestressed tendon. By application of the tension holding structure of the prefabricated track plate prestressed tendon, after a prestressed steel bar is tensioned, when the elastic component fits the periphery of the second gear on the periphery of the first gear, pressure is provided for the first gear, ensuring that after the first gear rotates, gear teeth of the first gear can be meshed with a toothed groove of the second gear, the first driving component drives the first gear to rotate, the first gear rotates to drive the second gear to rotate, the second gear axially moves along the tension rods while rotating, and draws close to and is attached to the track plate die wall, a tension state of the prestressed steel bar is retained continuously by using a fastening and self-locking function of threaded connections, the prestressed loss that may be caused by an existing anchor plate mode is overcome, and it is ensured that the track plate tensioning is qualified.

The invention discloses a torsion bar spring combined by multistrand bar steel. The existing cylinder spiral torsion spring and the spiral spring used in a belt tightening device of an engine as the torsion springs are hard to realize lightweight design, have large torque loss, noise and high cost in the part serialization process. The torsion bar spring is a multistrand combination body combined by at least three strands of bar steel with polygonal cross section along the length direction, especially the bar steel with regular hexagonal cross section at same size. A connecting piece for tightening the bar steel which forms the multistrand combination body is arranged at one end of the multistrand combination body, and the multistrand combination body is sleeved tightly by a tightening pipe. The installation angle and working torsion angle of the spring can be adjusted and changed during use, so that the torsion bar spring generates corresponding torque and the belt tightening force of the engine can be adjusted. The spring has high torsional rigidity, small rotating center, small torque loss after long-time working in the working range, no frictional noise and long fatigue life.

The invention discloses an eccentric-swing gear reducer which comprises a pin wheel housing, pin teeth, a swing gear, a planet carrier and crankshafts, wherein pin tooth grooves are formed in the pinwheel housing; the pin teeth are installed in the pin tooth grooves; the swing gear is meshed with the pin teeth; the planet carrier is in rotatable connection to the pin wheel housing; the crankshafts are in rotatable connection to the planet carrier; the axes of rotation of the crankshafts relative to the planet carrier are parallel to the axis of rotation of the planet carrier relative to the pin wheel housing; shaft holes are formed in the swing gear; the crankshafts are provided with eccentric parts which are inserted into the shaft holes so as to drive eccentric gears to eccentrically rotate; and oil storage tanks which store a lubricant material used for lubrication at meshed positions of the pin teeth and the swing gear are formed in the pin wheel housing. The eccentric-swing gearreducer disclosed by the invention has the advantages that lubrication effects are good; and heat emission, abrasion and torque losses generated therefrom during meshing are reduced.

The invention discloses a permanent magnet synchronous instability-preventing weak magnetic method. The method comprises the following steps of S1 setting Udc according to a required voltage utilization rate, designing a voltage loop, and calculating a table look-up coefficient k; S2 calculating according to the motor rotating speed, the bus voltage, the rated voltage Uk and the table look-up modulation coefficient k to obtain a final actual table look-up rotating speed; S3 calibrating and storing a weak magnetic current point, and calculating (id, iq) according to the modulation coefficient k, the bus voltage Udc, the motor rotating speed Spd and the torque request Tor; S4 calculating real-time flux linkages psi d and psi q by the voltage feed-forward unit according to the calculated reference current id and iq in combination with a flux linkage parameter table calibrated in advance, and then sending the real-time flux linkages psi d and psi q to the feed-forward voltage calculation unit to calculate feed-forward voltage compensation amounts UdC and UqC; and S5 enabling a current regulator to adopt a PI controller, using the compensated current as reference input, and outputting reference voltage through regulation of the current regulator. The invention provides the permanent magnet synchronous instability-preventing weak magnetic method which can give full play to the characteristics of a permanent magnet synchronous motor.

The invention relates to an engine oil balance system and an operation method thereof. The engine oil balance system comprises an oil pan (9), an engine oil sleeve (10), a conventional oil pump (5), awind resistance auxiliary oil pump (4) and an air collecting cover (6); the conventional oil pump (5) communicates with the oil pan through an engine oil input pipeline (12a) and communicates with the engine oil sleeve through the engine oil input pipeline and an engine oil input main pipeline (12'); the wind resistance auxiliary oil pump (4) communicates with the oil pan through an auxiliary engine oil input pipeline (12b) and communicates with the engine oil sleeve through the auxiliary engine oil input pipeline and an engine oil input main pipeline, a gear meshing device (8) is arranged inthe wind resistance auxiliary oil pump, and one gear of the gear meshing device is meshed with the conventional oil pump (5); and the air collecting cover (6) is connected to the wind resistance auxiliary oil pump, and is used for driving the wind resistance auxiliary oil pump by utilizing collected air. The engine oil balance system has the advantages that oil consumption can be reduced, the torque loss of an engine can be reduced, the power output of the engine can be increased, abrasion of the engine can be reduced, and the service life of the engine can be prolonged.

The invention provides a component for a metal belt of a continuously variable transmission, and can appropriately reduce the stress generated at a neck root portion of the component to enhance the repeated fatigue strength when the metal belt is driven, thereby enhancing the torque transmission capacity of the continuously variable transmission and the power transmission efficiency of the continuously variable transmission in the vicinity of an overrunning ratio region. A steel material having a carbon content of 0.61% or more and 0.71% or less is used as a steel material for the component to produce the component. At this time, the shape of the neck root portion connecting a saddle shape surface and a neck side surface is formed by three curved surfaces connected in a smooth manner to each other and satisfying the relationship of R1 < R2 < R3 and D/R2 </= 0.3, and the three curved surfaces are a downwardly convex curved surface (PA-PB (R1)), a downwardly convex curved (PB-PD (R2)) and an upwardly convex curved surface (PD-PE (R3)). In addition, each of the connecting portions is smoothly connected to share the curved surfaces adjacent to the same tangent plane (tangent line).

In this method for controlling the coupling/decoupling of a traction machine of a motor vehicle to/from at least one wheel assembly, steps are carried out that allow the determination (120) of a moment (t_C1) when a torque set point (Croue_cons) to be applied to at least one wheel assembly of the vehicle is higher (110) than a pre-determined coupling threshold (C1) or higher than a pre-determined decoupling threshold, followed by the calculation (140) of a first parameter (PT1) and/or a second parameter (PS2) depending on said moment (t_C1), and the authorisation (160) of the coupling/decoupling when said first parameter (PT1) is higher (150) than a first pre-determined value (t1) and/or when said second parameter (PS1) is higher (150) than a second pre-determined value (S1).