51results about How to "Reduce input torque" patented technology

The invention discloses a five-cylinder plunger pump with an integral power end structure. According to the five-cylinder plunger pump, an integral welding structure is adopted for a crankshaft box body and a crosshead box body in a five-cylinder plunger pump power end assembly, so that the structural strength of the power end assembly is higher, the supporting stability is better, and the whole pump vibration can be reduced; the cylinder spacing is 13-14 inches, the bearing area of connecting rods, crossheads and bearing bushes is increased, a guarantee is provided for the output of the high-power of the five-cylinder plunger pump, the high-power five-cylinder plunger pump can effectively solve the problem that the shale gas fracturing well site area is narrow and the required fracturingequipment is relatively large, the use of equipment can be reduced, and the wellsite arrangement is facilitated; the 11-inches long-stroke design can better realize large-displacement operation requirements and improve the operation efficiency; and according to the multi-point supporting design of crankcase bodies, crosshead box bodies and the hydraulic end assembly, the supporting strength of thefive-cylinder plunger pump can be improved, the vibration is reduced, the high-load operation is better guaranteed, and the operation is more stable.

A method for controlling engagement and release of friction clutches in a multiple-ratio transmission for a hybrid electric vehicle powertrain uses electric motor torque to augment engine torque as a power-on downshift is commanded. Near the end of a downshift event, total powertrain torque is modulated or reduced to reduce torque disturbances.

A hybrid vehicle has an engine, an electric machine connected to the engine by an upstream clutch, a transmission gearbox connected to the electric machine by a downstream clutch, and a controller. The controller is configured to, in response to a commanded upshift of the gearbox, modulate a pressure of the upstream clutch. A method for controlling a vehicle includes, in response to a commanded upshift of a gearbox, controlling an upstream clutch to a first nonzero speed differential corresponding to a first inertia connected to and upstream of the gearbox to reduce inertia torque during the upshift. A method for controlling a vehicle includes, in response to a commanded upshift of a gearbox when the vehicle is beyond an electrical limit and a fast path torque reduction limit, slipping an upstream clutch and reducing torque outputs of an engine and an electric machine.

A cooperative control system for a prime mover and a continuously variable transmission of a vehicle, in which the continuously variable transmission is connected to an output side of the prime mover for generating a driving force for running, and in which a clamping pressure to set a torque capacity of the continuously variable transmission is raised and an input torque to the continuously variable transmission is lowered on the basis of a decision of the slip in the continuously variable transmission. A clamping pressure/input torque sequential control raises an actual pressure of the clamping pressure at or after a deciding instant of the slip convergence, and executes a control to complete a restoration of an actual torque of the lowered input torque afterward.

Described is a method for controlling and regulating a drive train of a vehicle comprising one drive unit, one transmission and one output unit. The transmission has controllable free-wheel device corresponding with toothed wheel pairs for disconnecting or connecting an old or a new gear and located on the input side one clutch. In the presence of a shifting signal for carrying out a higher traction shift, an input torque of the drive unit is quickly reduced so that a first vibration is induced in the drive unit. During a subsequent shifting, an operative connection is abruptly created between a free-wheel device and a toothed wheel pair corresponding therewith in a manner such that a second vibration counteracting the first vibration is produced in the drive train. With the engagement of the new gear the operative connection of the old gear is canceled as a result of a torque reversal from a pull torque to a push torque.

An engine including an oil passage through which oil output from an oil pump flows, an oil cooler mounted to the oil passage, and a branched oil passage for a hydraulically-powered device of the engine that is configured to branch in a location of the oil passage extending from the oil pump to the oil cooler to deliver the oil to the hydraulically-powered device.

The invention discloses a system and a method for improving operation of a hybrid vehicle. In one embodiment, an engine is coupled with a gear box in response to upshifting of the gear box so that the output shaft torque interference of the gear box is reduced.

A control apparatus (80; 122) for a vehicle provided with a motor/generator (MG2; MG) functioning as a drive power source, and a step-variable transmission (20; 110) which constitutes a part of a power transmitting path between the drive power source and drive wheels (28; 116) and which is placed in a selected one of a plurality of speed positions with engagement of a selected one or ones of a plurality of coupling devices (CB). The control apparatus includes: a torque control portion (86) configured to control an output torque (Ti) of the drive power source (MG2) during a shifting action of the step-variable transmission (40; 110) from one of the speed positions to another of the speed positions, on the basis of a required vehicle drive torque (Tidem) corresponding to an operation amount (θacc) of an accelerator pedal, such that a value representing a state of a rotary motion of an input rotary member (30) of the step-variable transmission coincides with a target value; and a torque limiting portion (92) configured to limit the required vehicle drive torque to a predetermined lower limit value (Tif) in the process of a shift-up action of the step-variable transmission which is performed by placement of the accelerator pedal in an operated position.

A method is provided for executing a gearshift in an automatic transmission with several shifting elements. Upon the execution of the gearshift, a first frictional-locking shifting element is opened and a second positive-locking shifting element is closed. If, upon the execution of the gearshift, an input torque of the automatic transmission is less than a threshold value, after at least partially opening the frictional-locking shifting element and after releasing the positive-locking shifting element, there is a monitoring of whether the positive-locking shifting element is transferred into its end position. If it is then determined that the positive-locking shifting element is not in its end position, a torque transferred by the partially open frictional-locking shifting element initially increases. If, despite the increase in torque transferred by the frictional-locking shifting element, the positive-locking shifting element is not in its end position, the operating pressure of the positive-locking shifting element is then increased.

A vehicle control apparatus selects one of a power-on control and a power-off control for execution of a shift-down action in a transmission of a vehicle, and implements the selected power-on or power-off control. When a running speed of the vehicle is not lower than a predetermined value, the control apparatus selects one of the power-on control and the power-off control, based on a target input torque that is to be inputted to the transmission. When the vehicle running speed is lower than the predetermined value, the control apparatus selects one of the power-on control and the power-off control, based on an actual input torque that is actually inputted to the transmission.

A cover closer having a drive unit for electrically opening and closing a cover of a copying machine or the like is described. The cover closer can ease the burden of manipulation of the cover and minimize the constraints on designing the main body of the copying machine and the like. The cover closer is provided with a compact drive unit having a high reduction ratio by the use of planetary gears which reduce the input torque necessary for opening and closing the cover, so as to downsize an electric motor used in the drive unit. The drive unit can therefore be installed within the hinge structure of the cover closer.

The invention relates to an automatic device for being capable of fastening multiple screws at the same time, in particular to a synchronous fastening device. The synchronous fastening device achievesthe purpose of being simple in structure, convenient to adjust, high in reliability and uniform in stress of a fastened piece. The synchronous fastening device comprises a power source, a base, a fixing shaft fixedly installed at one side of the base, a driving gear which sleeves the fixing shaft and can rotate relative to the fixing shaft, a plurality of driven gears capable of being externallymeshed with the driving gear, a plurality of transmission shafts capable of synchronously rotating relative to the driven gears, and a fastening piece which is connected with one ends of the transmission shafts and can synchronously move along with the transmission shafts. The fastening piece is used for fastening the piece to be fastened. The fastening piece is matched with the piece to be fastened. The power source is used for supplying power to the driving gear. The automatic device further comprises a transition gear. The device adopts the single power source to achieve synchronous screwing of the screws, assembling and adjusting are easy, the cost is low, the requirement for the environment is low, and the application range is wide.

The invention provides a self-locking deceleration support bearing for a photovoltaic support. The self-locking and deceleration characteristics are realized; the self-locking characteristic is that the large-scale single-shaft automatic tracking photovoltaic support is integrally locked in case of strong wind. The resonance phenomenon with large destructive power is eliminated; the photovoltaic support is protected; due to the deceleration characteristic, the photovoltaic support can be supported and rotated without a long and heavy rotating beam; accurate coaxial installation is not needed;the construction is easy; the foundation settlement photovoltaic support can still operate, the operation reliability is improved, a small speed reducer and a motor can be used for driving the large single-shaft automatic tracking photovoltaic support according to the deceleration characteristic, the manufacturing cost of the photovoltaic support and the power consumption of the motor are reduced,and the bearing has the advantages of being small in size, light in weight and low in manufacturing cost.

An automated drive train is provided for a motor vehicle comprising a single friction clutch, which is actuatable by a first actuator. A step transmission connected to the output side of the friction clutch comprises wheel sets to engage and disengage forward gears. A plurality of partial load positive gear shift clutches are provided which each include a synchronization means and which are actuatable by means of second actuators for engaging and disengaging the gears. A controller is provided for controlling the actuators such that the drive train is controlled to carry out a gear change under one of the three possible modes (A, B, C) depending on the conditions of the gear change to be made, wherein the three possible modes (A, B, C) of gear changes take place with an opened (C), a closed (B) or with a slipping (A) friction clutch (FIG. 6).

The invention discloses a four-shaft harmonic speed reducer numerical control swing head. The four-shaft harmonic speed reducer numerical control swing head comprises a harmonic speed reducer, a synchronous wheel, a synchronous belt, a driving motor, a connecting plate and an electric spindle, wherein the driving motor is connected with the synchronous wheel through the synchronous belt, the synchronous wheel is connected to the harmonic speed reducer, and the harmonic speed reducer is connected to the electric spindle through the connecting plate. According to the four-shaft harmonic speed reducer numerical control swing head, due to the facts that the driving motor is connected with the synchronous wheel through the synchronous belt, and the synchronous wheel drives the harmonic speed reducer to rotate, vibration of the driving motor at a low speed can be effectively reduced, large output torque can be obtained by the driving motor with small input torque, and accuracy of the numerical control swing head can be improved through small rotation gaps of the harmonic speed reducer.

The invention discloses a compressed air energy storage compressor system and a control method thereof. A hydraulic coupler is connected into the compressed air energy storage compressor system, and amotor is connected with the hydraulic coupler through a motor drive shaft, and the hydraulic coupler is connected with a high-pressure stage compressor through a compressor drive shaft; through the speed adjusting function of the hydraulic coupler, the rotating speed of the compressor can be reduced, and the pressure ratio of the compressor can be adjusted, the pressure of compressed air of compressor outlets can be changed before the compressed air pressure in an air storage tank does not reach the rated pressure, so that the outlet pressure of the compressors is matched with the pressure ofthe air storage tank, and the energy loss of the high pressure compressed air is reduced; and meanwhile, the input torque of the compressors is reduced due to the adjustment of the hydraulic coupler,the motor power is reduced, and the aims that the compressed air energy storage system reduces energy loss and improves electric-electric conversion efficiency are achieved.

A torque converter has a torus. The torus has a size set based on a flatness ratio obtained by dividing a width of the torus in an axial direction by a width of the torus in a radial direction, a thinness ratio obtained by dividing the width of the torus in the axial direction by an outer diameter of the torus, and an inner diameter ratio obtained by dividing an inner diameter of the torus by the outer diameter of the torus.

When throttle valve opening degree is larger than predetermined throttle valve opening degree Y in the case where a decision on shift to gear stage at which maximum load is applied to predetermined rotary member of automatic transmission is made, the gear stage is not formed. Therefore, large load is restrained from being applied to the predetermined rotary member of the automatic transmission. Besides, gear stage that is lower in vehicle speed than the gear stage by one stage or gear stage that is higher in vehicle speed than the gear stage by one stage is formed depending on whether acceleration requirement is large or small. Therefore, driving torque corresponding to the acceleration requirement is likely to be obtained. In consequence, the load applied to the predetermined rotary member of the automatic transmission can be reduced, and feeling of strangeness can be restrained from being caused by the driving torque.

The invention discloses a full-lining ceramic wheel valve. The full-lining ceramic wheel valve comprises a valve element, a valve seat, an upper flange lining, a lower flange lining, a driving ring, avalve rod, an upper flange, a valve body and a lower flange, the upper flange and the lower flange are fixed to the upper end and the lower end of the valve body through connecting pieces correspondingly, the center lines of the upper flange, the lower flange and the valve body are located on the same straight line, the upper flange lining is mounted in the upper flange, the lower flange lining is mounted in the lower flange, the valve element, the valve seat, the driving ring and the valve rod are mounted in a valve cavity composed of the upper flange lining, the lower flange lining and thevalve body, the valve seat is fixed into the lower flange and mounted on the lower flange lining, a protruding shaft is arranged in the center of the valve seat, the valve element is fixed into a circular ring of the driving ring, the center of the valve element is mounted on the protruding shaft, a plurality of flow holes in the circumferential direction of the valve element and the valve seat are formed in the valve element and the valve seat, at least one end of the valve rod penetrates through the valve body, the center line of the valve rod is perpendicular to the center line of the valveelement and the center line of the driving ring, and the valve rod drives the valve element and the driving ring to rotate around the protruding shaft, so that the flow holes in the valve element andthe flow holes in the valve seat are aligned or staggered mutually.