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

The invention relates to a smart camshaft phase regulator of a variable valve timing system of an engine, in particular to a smart camshaft phase regulator capable of greatly shortening the axial size, which aims to solve the problems that the front end of the engine is difficult to arrange due to the overlarge axial size of a traditional product. The invention has compact and simple structure, small axial size, high response speed and great output torque. The invention adopts the technical scheme that the smart camshaft phase regulator of the variable valve timing system of the engine comprises a plug, a sealing gasket, a front end cover, a rear end cover, a hollow shell, a rotor and a return spring and is characterized in that the plug and the sealing gasket are connected with the front end cover together, the front end cover and the rear end cover are respectively connected with the shell which is hollow inside, the rotor is arranged in the shell, the front end cover is dented inwards to form a radial groove, one side of the rotor, which is close to the front end cover, is dented inwards to form a groove, and the return spring is arranged in a hollow cavity formed by the radial groove and the groove. The invention is mainly applied to the camshaft phase regulator of the engine.

The invention relates to a smart camshaft phase regulator of a variable valve timing system of an engine, in particular to a smart camshaft phase regulator capable of greatly shortening the axial size, which aims to solve the problems that the front end of the engine is difficult to arrange due to the overlarge axial size of a traditional product. The invention has compact and simple structure, small axial size, high response speed and great output torque. The invention adopts the technical scheme that the smart camshaft phase regulator of the variable valve timing system of the engine comprises a plug, a sealing gasket, a front end cover, a rear end cover, a hollow shell, a rotor and a return spring and is characterized in that the plug and the sealing gasket are connected with the frontend cover together, the front end cover and the rear end cover are respectively connected with the shell which is hollow inside, the rotor is arranged in the shell, the front end cover is dented inwards to form a radial groove, one side of the rotor, which is close to the front end cover, is dented inwards to form a groove, and the return spring is arranged in a hollow cavity formed by the radialgroove and the groove. The invention is mainly applied to the camshaft phase regulator of the engine.

The present invention relates to a planetary gear set with one side of a planetary carrier extending to form gear teeth, and to a power transmission apparatus having reduced rotating speed input from a driving power source and input to one actuating means of the planetary gear set and a transmission power source rotating speed is input to the other actuating means to achieve a plurality of gear shifts, and which receives generating power from an output shaft, stores electrical energy, and utilizes the stored electrical energy to control transmission power source, thereby controlling the transmission input shaft with ease. The power transmission apparatus comprises: an input shaft, one end of which is constantly connected to the driving power source to receive power, and to which a driving gear is fixed; a deceleration unit coupled to the driving gear to reduce the rotating speed of the input shaft; a planetary gear set including 1st actuating means coupled to the deceleration unit to receive rotating speed of the deceleration unit, 2nd actuating means for receiving gear-shifting power, and 3rd actuating means for generating output speed; a gear shift unit connected to the transmission power source to receive power for gear-shifting, and coupled to the 2nd actuating means to transmit power for gear-shifting to the 2nd actuating means; and an output shaft fixed at the 3rd actuating means to deliver an output speed. The 2nd actuating means has a rotary shaft and the gear shaft unit has a rotary shaft, wherein the two rotary shafts are arranged vertically to one another. A torque control shaft is connected to the 2nd actuating means to receive rotating force of the 2nd actuating means via power transmission means. The torque control shaft is equipped with a generator for generating electrical energy. A battery for supplying power to the transmission power source is connected to the generator.

The invention relates to a high performance driller protector which is used for a mud medium ultra deep well and an ultra deep well extended reach well with strong vibration, high friction and high possibility of failure. The driller protector has the functions of lubricating strongly, centralizing, reducing friction and resistance, releasing the bushing camber wear, preventing a key slot from clamping and the driller and protecting a connector. The technical proposal is as follows: a coupling housing is arranged at a centralizer connector body, the outside surface is provided with a medium flow passage and a tapered pressure groove which are uniformly distributed on the coupling housing in a spaced way; the inner part is provided with a pair of rolling bearings directly interference arranged on the connector body; the rolling bearings and the sleeve as well as the self-lubricating obturating ring set are respectively arranged on the inner surface of the two ends of the coupling housing symmetrically; and a middle filling cavity of the two rolling bearings and a top filling cavity between the bearings and the connector body are filled with graphite. The driller protector has strong ability to decrease vibration and to release the abrasion of the drill pipe and the bushing, reduces the torque, increases the drilling ability, has a simple structure and low cost, and is used for drilling in an oil-gas field.

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).

The present invention relates to a V-ribbed belt, which is a V-ribbed belt in which the friction transmission surface of a compression rubber layer is covered with a knitted cloth, wherein the compression rubber layer is made of a rubber composition containing ethylene-α-olefin elastomer and carbon black The solidified product is formed, the above-mentioned carbon black contains soft carbon with a primary particle size of 40 nm or more and hard carbon with a primary particle size of less than 40 nm, and the ratio of the number of particles of the above-mentioned soft carbon to the above-mentioned hard carbon is the former / the latter=3 / 97~ 25 / 75.

The invention discloses a vector stepless magnetic field weakening method for permanent magnet synchronous motors, which cannot fully utilize the characteristics of permanent magnet synchronous motors. The invention expands the high-speed strategy, improves the stability of deep magnetic field weakening, and reduces the torque in dynamic adjustment Loss, use the current after the compensation voltage look-up table to carry out the voltage feedforward module, with the increase of the speed, the stability of the system increases, and the dynamic response can be fast and stable at high-speed magnetic field weakening, and the torque loss is very small, avoiding the loss of torque Loss, give full play to the characteristics of the permanent magnet synchronous motor, ensure the stable operation of the motor in the deep field weakening area, fast dynamic response, strong robustness, simple and easy to operate.

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).

The invention discloses a permanent magnet synchronous anti-instability field-weakening method. The method includes the following steps: S1: setting U according to a demanded voltage utilization rate dc , design the voltage loop, calculate the look-up table coefficient k; S2: calculate the final actual look-up table speed according to the motor speed, bus voltage, rated voltage Uk and look-up table modulation coefficient k; S3: calibrate the field weakening current point and store, according to Modulation coefficient k, bus voltage U dc , the motor speed Spd and the torque request Tor are calculated (i d , i q ); S4: The voltage feedforward unit calculates the real-time flux linkage ψ according to the reference current id and iq calculated above, combined with the pre-calibrated flux linkage parameter table d and ψ q , and then sent to the feed-forward voltage calculation unit to calculate the feed-forward voltage compensation quantities UdC and UqC; S5: The current regulator adopts a PI controller, and the compensated current is the reference input, which is adjusted by the current regulator to output the reference voltage. The invention provides a permanent magnet synchronous anti-instability field weakening method which can fully utilize the characteristics of the permanent magnet synchronous motor.

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.

An apparatus for controlling variable valve timing in an internal combustion engine that varies the opening and closing of intake and exhaust valves by controlling the rotational phase of the crankshaft relative to the crankshaft of the internal combustion engine time, the apparatus includes a controller configured to determine whether the engine state enters the scavenging region in the overlapping region of the intake valve and the exhaust valve and controls the variable valve timing to The period of time elapsed after the zone, reducing the valve overlap time.

Disclosed is a paper separator of automatic paper feeder capable of steadily separating the outmost paper from a pile of paper and feeding the separated paper. It comprises a paper separating wheel driven by a drive unit to rotate, a friction wheel, a first shaft and a force exerting mechanism. The friction wheel has a first rotation state when driven by the paper separating wheel to rotate, a rest state when the paper separating wheel feeding the first piece of paper, a second rotation state when driven by the second piece of paper which is fed by the paper separating wheel to rotate. The first shaft equipped in the friction wheel provides a damping torque to prevent the friction wheel from rotation. And the force exerting mechanism push the paper separating wheel and friction wheel to close together.

In the present invention, in order to provide a fluid dynamic bearing, having heat resistance, wherein the electrical charging on a rotation portion is prevented and the torque loss caused by a lubricant is made lower, an ionic liquid or the like is added to the lubricant filled in the clearance between the opposed faces of a shaft and a sleeve unit as an electrical conductivity imparting agent.