Class / Patent application number | Description | Number of patent applications / Date published |
474028000 | Fluid pressure actuator for adjustment of member | 56 |
20080220917 | Belt-driven conical-pulley transmission with hydraulic system and auxiliary oil source - A belt-driven conical-pulley transmission contained in the power train of a motor vehicle and having two conical disk pairs encircled by an endless torque-transmitting element. A hydraulic system is provided for pressing the conical surfaces of the conical disks against the endless torque-transmitting means and for opposite adjustment of the spacing between the conical disks for an adjustment of the transmission ratio. The hydraulic system includes a pump driven by an internal combustion engine that propels the vehicle, and the system includes an auxiliary oil source with which a predetermined minimum pressure is maintained in the hydraulic system when the internal combustion engine is shut off. | 09-11-2008 |
20080300075 | Oil supply system for motor vehicle - A oil supply system is provided for the CVT of an automobile, and includes: a variable-transmission hydraulic controller, which employs hydraulic oil to adjust the actual gear ratio until the actual and the target gear ratios match; and a CVT controller, which transmits operation instructions to the variable-transmission hydraulic controller. The variable-transmission hydraulic controller includes a motor-driven oil pump, driven by an electric motor, for supplying hydraulic oil to the CVT. Based on an operation instruction transmitted by the CVT controller, the electric motor is rotated either forward to increase the pressure of hydraulic oil to be supplied to the CVT, or rearward to reduce the pressure, so that the pressure of the hydraulic oil can be adjusted to obtain a required pressure value that is consonant with the operating state of the automobile. | 12-04-2008 |
20090029813 | Pressure relief valve for a hydraulic system - A pressure relief valve for a hydraulic system for controlling a belt-driven conical-pulley transmission. The valve includes an orifice having an opening to admit a stream of a hydraulic medium, and a valve cone to block the opening in the orifice. A spring is carried by the valve cone to apply a restoring force to press the valve cone against the orifice in sealing contact with the opening. A hydraulic plate having a valve bore is provided to receive and guide the valve cone and the spring. A lateral force support is carried by the valve cone to align the axis of the valve cone relative to the axis of the orifice opening. | 01-29-2009 |
20090105020 | FLOW RATE REGULATION VALVE, ROTATING BODY, AND BELT-TYPE STEPLESS TRANSMISSION - A flow control valve is provided in a primary pulley that is a rotor, and includes a first port; a second port; a working fluid channel formed between the first port and the second port and through which working oil passes; a check valve that is formed in the working fluid channel and is opened toward a first-port-side channel from a second-port-side channel of the working fluid channel; and a valve-opening control section (a guide member, a spool, a cylinder, and a drive pressure chamber) that is arranged at the check valve at the side of the second port, that forcibly opens the check valve when discharging the working fluid from the first port to the second port, and increases a channel resistance of the second-port-side channel as an opening amount of the check valve is small. The flow control valve can prevent over-discharge of the working fluid at the beginning of opening the valve. | 04-23-2009 |
20090286633 | VEHICULAR BELT-DRIVEN CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREOF - In a vehicular belt-driven continuously variable transmission, belt squeezing force is inhibited from becoming excessive and a safety factor, with respect to belt slip, of belt squeezing force applied to a transmission belt ( | 11-19-2009 |
20090291788 | HYDRAULIC ACTUATOR FOR BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION - A hydraulic actuator for a belt type continuously variable transmission, with which a smooth operation is secured and both superior productivity and reduced manufacturing costs can be expected, includes a first cylinder provided on a movable sheave, a drum having a first drum portion that covers the first cylinder and a second drum portion that is fitted to a boss portion of the movable sheave and formed with a plurality of projections, a first plunger having a cylindrical portion that is fitted to the first cylinder and the second drum portion to form a first hydraulic chamber, and a second plunger fitted to the cylindrical portion and the first cylinder to form a second hydraulic chamber. An oil passage connecting the first hydraulic chamber and the second hydraulic chamber is formed by a gap between the second drum portion and cylindrical portion, which are fitted together. | 11-26-2009 |
20090298626 | CONTINUOUSLY VARIABLE TRANSMISSION - A continuously variable transmission in which a sliding member is prevented from inclining is provided. The continuously variable transmission has a first oil passage provided in a movable sheave, and a second oil passage provided in a primary shaft supporting the movable sheave and connected in series to the first oil passage. A working oil is discharged from a hydraulic chamber via the first and second oil passages. The working oil is more difficult to discharge from the second oil passage than the first oil passage. | 12-03-2009 |
20100120562 | CONTINUOUSLY VARIABLE TRANSMISSION - A continuously variable transmission is provided with i) a primary pulley that is formed by a driving-side fixed sheave that is fixed to a drive shaft, a driving-side movable sheave, and a driving-side cylinder member, and has a driving-side cylinder, ii) a secondary pulley that is formed by a driven-side fixed sheave that is fixed to a driven shaft, a driven-side movable sheave, and a driven-side cylinder member, and has a driven-side cylinder, and iii) a drive belt. The drive shaft has a drive shaft internal fluid passage for supplying hydraulic fluid to the driving-side cylinder. A driving-side communicating fluid passage that communicates the drive shaft internal fluid passage with the driving-side cylinder is formed between the driving-side cylinder member and the driving-side movable sheave. | 05-13-2010 |
20100151977 | HYDRAULIC PRESSURE SUPPLY UNIT OF CONTINUOUSLY VARIABLE TRANSMISSION - A control valve switches between the (A) state where the first oil passage to which a hydraulic pressure obtained by decreasing a line pressure is supplied is in communication with the fifth oil passage for supplying the hydraulic pressure to a forward clutch or a reverse brake and the third oil passage to which a hydraulic pressure controlled by an SLP linear solenoid valve is supplied is in communication with the sixth oil passage for supplying the hydraulic pressure to a primary pulley, and the (B) state where the second oil passage to which a hydraulic pressure controlled by an SLT linear solenoid valve is supplied is in communication with the fifth oil passage and the fourth oil passage for supplying the hydraulic pressure to a secondary pulley is in communication with the sixth oil passage. The fourth oil passage has an orifice. | 06-17-2010 |
20100184544 | HYDRAULIC CONTROL SYSTEM FOR TRANSMISSION - In a hydraulic control system for a transmission, line pressure Pl is adjusted in accordance with a second solenoid pressure Psls if the ratio of a first sheave pressure Pin with respect to a second solenoid pressure Psls is equal to or less than the gain α. If not so, the line pressure Pl is adjusted in accordance with the first sheave pressure Pin. Consequently, the gain η of the first sheave pressure Pin with respect to a first solenoid pressure Pslp at a first sheave pressure adjustment valve | 07-22-2010 |
20100203989 | Power transmission device - A power transmission device is installed in a vehicle and connected to a power generation source that is capable of outputting power for driving. The power transmission device includes a belt-type continuously variable transmission; a working fluid accumulation portion; a friction engagement element; a first pump; a pressure regulating valve; a friction engagement element pressure regulating valve; a second pump; and a switching valve. | 08-12-2010 |
20100234152 | Conical disk pair for a belt-driven conical-pulley transmission - A sensing device integrated into a conical disk pair has a sensing piston, which is movable relative to the input shaft over a radially stepped guide surface formed on a shaft and a corresponding opposing stepped surface formed on the sensing piston. The steps form a damping chamber between the guide surface and the opposing surface, whose volume changes when the sensing piston moves relative to the shaft. | 09-16-2010 |
20100240480 | ANTI-ROTATION STRUCTURE FOR BALANCE CHAMBER SNAP RING OF BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION - The present invention provides an anti-rotation structure for a balance chamber snap ring of a belt type continuously variable transmission having a balance chamber that balances a centrifugal oil pressure generated in an oil pressure chamber formed on a movable sheave back surface. A projecting portion, which comes into contact with an end portion of the balance chamber snap ring when the balance chamber snap ring rotates independently within a ring groove about a secondary shaft, thereby restricting independent rotation of the balance chamber snap ring, is provided on a latch portion of a cover member. As a result, independent rotation of the balance chamber snap ring can be prevented, thereby preventing the cover member and the balance chamber snap ring from becoming worn. | 09-23-2010 |
20100248874 | BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREOF - A belt type continuously variable transmission includes a continuously variable shift mechanism having a primary pulley, a secondary pulley and a belt wound around the respective pulleys, a pulley thrust calculation unit that calculates a pulley thrust, which is used to bias the respective pulleys in a direction for reducing the pulley width, so as to include a predetermined margin, a hydraulic control unit that controls an oil pressure supplied to each of the pulleys on the basis of the calculated pulley thrust, and an upshift determination unit that determines whether or not an upshift, during which the speed ratio is reduced, is underway. The pulley thrust calculation unit sets the predetermined margin to be smaller when an upshift is determined to be underway than when an upshift is determined not to be underway. | 09-30-2010 |
20110039646 | Hydraulic system for actuating at least two valves - A hydraulic system for actuating at least two valves, particularly for actuating a conical-pulley continuously variable transmission of a motor vehicle having a continuously variable transmission ratio (CVT), and with a control valve that controls at least two control valves by controlling total control pressure. Between the control valve and a first valve of at least two valves a cutoff valve is connected, through which the total control pressure provided above a switching threshold can be reduced to minimum control pressure acting at least on the first valve or to zero by means of the control valve. | 02-17-2011 |
20110118066 | SHEAVE POSITIONING DEVICE - To discharge a pressure from a hydraulic chamber of a belt-type continuously variable transmission certainly. | 05-19-2011 |
20110230285 | CONTROL DEVICE AND CONTROL METHOD FOR AUTOMATIC TRANSMISSION - In a control device for an automatic transmission having a flow control mechanism that causes a part of a working oil discharged from a mechanical oil pump to flow into the mechanical oil pump when a differential pressure between an upstream side and a downstream side of a narrowed portion increases beyond a predetermined value, the narrowed portion being provided in a discharge passage through which the working oil discharged from the mechanical oil pump flows, a line pressure is raised when an oil temperature of the working oil is equal to or higher than a predetermined oil temperature and an engine torque is equal to or smaller than a predetermined engine torque. | 09-22-2011 |
20110263362 | Hydraulic arrangement for controlling a transmission - A hydraulic arrangement for controlling a transmission connected downstream of an internal combustion engine having a start-stop device. A hydraulic energy source provides hydraulic energy, an energy accumulator is connected downstream of the hydraulic energy source for storing and dispensing hydraulic energy provided by the hydraulic energy source, and a hydraulic controller is associated with the hydraulic energy source and the energy accumulator for controlling the transmission. The energy accumulator is associated with the hydraulic controller by a branch line to a pilot control circuit. | 10-27-2011 |
20110269583 | HYDRAULIC CONTROL APPARATUS AND HYDRAULIC CONTROL METHOD - If it is determined that a malfunction has occurred in an electrical hydraulic pump and the hydraulic fluid is not supplied to a high hydraulic pressure supplied portion from the electrical hydraulic pump, the hydraulic fluid is supplied to the high hydraulic pressure supplied portion from a mechanical hydraulic pump that usually supplies the hydraulic fluid to a low hydraulic pressure supplied portion. In this case, the hydraulic pressure that is generated by the mechanical hydraulic pump is increased by increasing the output from the engine that drives the mechanical hydraulic pump. | 11-03-2011 |
20110275464 | BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION CONTROL SYSTEM - When a driver returns an accelerator pedal, preliminary pressure increase means increases a line pressure to a preliminary pressure increase value according to the speed of return of an accelerator pedal detected by an accelerator pedal return speed sensor, and subsequently when a braking state sensor detects that the speed of depression of a brake pedal is a predetermined value or above, pressure increase when braking means further increases the line pressure from the preliminary pressure increase value to a slip preventing pressure increase value. In this way, since the line pressure is increased to a preliminary pressure increase value when it is predicted that braking will be carried out subsequent to an accelerator pedal return operation, when subsequently there is sudden braking it becomes possible to increase the line pressure to a slip preventing pressure increase value that can prevent an endless belt from slipping with good responsiveness, thereby preventing effectively the endless belt from slipping accompanying sudden braking. | 11-10-2011 |
20120035009 | TWO-WHEELED MOTOR VEHICLE - A motorcycle capable of reducing and minimizing a period of time in which air that is immixed into hydraulic oil due to a vehicle body being inclined in a left-right direction stays in the hydraulic oil, includes an oil pump to feed hydraulic oil to an oil chamber of a primary pulley and an oil chamber of a secondary pulley, and a first control valve. The first control valve includes a discharge port to discharge the hydraulic oil from a first oil passage continuously from the oil pump to the oil chamber. Under normal control, the controller operates the first control valve based on the driving state of the motorcycle. Further, the controller determines whether or not the inclination of the motorcycle exceeds a predetermined threshold, and when the inclination of the motorcycle exceeds the predetermined threshold, the controller operates the first control valve such that the discharge port is prevented from being closed. | 02-09-2012 |
20120040788 | BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION - A belt type CVT, which has a variable drive pulley controlling a transmission gear ratio by varying a diameter and a variable driven pulley connected to the variable drive pulley by a belt and controlling a tension of the belt by varying a diameter in a manner opposite to that of the variable drive pulley, in which each of the variable drive and driven pulleys includes belt supports movably installed between a pair of pulley plates, and transmission plates mounted to outside surfaces of respective pulley plates and rotated in opposite directions, thereby moving the plurality of belt supports in the radial directions, and the inner surface of the belt is provided with ratchet gear parts engaged with the belt holding ratchet gear parts of the belt supports, so that the diameters of the variable drive pulley and the variable driven pulley can be more easily and efficiently varied. | 02-16-2012 |
20120108373 | CONTROLLER AND CONTROL METHOD OF BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION - Provided is control device and method for a belt type continuously variable transmission which can reduce drive energy consumption by a decrease in belt friction when the estimated accuracy of belt slip condition is high and which can prevent the belt from greatly slipping during belt slip control when the estimated accuracy of belt slip condition is low. The device includes a primary pulley ( | 05-03-2012 |
20120108374 | BELT-BASED, CONTINUOUSLY-VARIABLE TRANSMISSION CONTROL DEVICE AND CONTROL METHOD - Provided are control device and method for a belt type continuously variable transmission which can improve control stability of secondary hydraulic pressure with the estimated accuracy of a belt slip condition during belt slip control ensured. The device has a primary pulley ( | 05-03-2012 |
20120135829 | CONTROLLER AND CONTROL METHOD OF BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION - Provided is control device and method for a belt type continuously variable transmission which can reduce drive energy consumption by a decrease in belt friction when the estimated accuracy of belt slip condition is high and which can prevent the belt from greatly slipping during belt slip control when the estimated accuracy of belt slip condition is low. The device includes a primary pulley ( | 05-31-2012 |
20120178561 | Driving Pulley for a Continuously Variable Transmission - A driving pulley for a CVT has a shaft, a fixed sheave mounted on the shaft, a first sleeve disposed around the shaft and being operatively connected to the shaft, a movable sheave mounted on the first sleeve, a second sleeve disposed around the first sleeve and being connected to the shaft, a spring biasing the movable sheave away from the fixed sheave, and a CVT chamber having an annular cross-section. The fixed and movable sheaves are adapted to receive a belt therebetween. The CVT chamber has at least one opening adapted for fluidly communicating the CVT chamber with a hydraulic fluid reservoir. Hydraulic pressure in the CVT chamber biases the movable sheave toward the fixed sheave. The CVT chamber has an inner wall formed by the first sleeve, an outer wall formed by the second sleeve, an outer end, and an inner end formed by the movable sheave. | 07-12-2012 |
20120178562 | Vehicle Powertrain Having a Hydraulic Continuously Variable Transmission - A vehicle powertrain has an engine, a driving shaft having a passage defined therein, a driven shaft, a pump, a hydraulic fluid reservoir, and a CVT. A driving pulley of the CVT includes a fixed sheave and a movable sheave disposed on the driving shaft for rotation therewith, a spring biasing a movable sheave away from the fixed sheave, and a CVT chamber fluidly communicating with the passage of the driving shaft. The pump supplies hydraulic fluid from the reservoir to the passage in the driving shaft. The hydraulic fluid flows from the passage to the CVT chamber to create a hydraulic pressure in the CVT chamber. The hydraulic pressure in the CVT chamber biases the movable sheave toward the fixed sheave. | 07-12-2012 |
20120244974 | BELT-DRIVE CONTINUOUSLY VARIABLE TRANSMISSION - A belt-drive continuously variable transmission including a lock mechanism for locking a primary moveable sheave of a primary pulley in a highest transmission ratio position. The lock mechanism includes a fixed side axial groove extending on an outer circumferential surface of a primary fixed sheave shaft, a moveable side axial groove extending on an inner circumferential surface of a primary moveable sheave sleeve, an intervening member disposed between the axial grooves, an axial tapered groove formed as a part of at least one of the axial grooves which is disposed corresponding to a highest transmission ratio, and an intervening member displacement limiting member arranged to limit an amount of displacement of the intervening member relative to the primary fixed sheave shaft along the fixed side axial groove or the moveable side axial groove. | 09-27-2012 |
20130109516 | HYDRAULIC CONTROL SYSTEM FOR A WRAPPING TRANSMISSION | 05-02-2013 |
20130165282 | CONTROL DEVICE OF CONTINUOUSLY VARIABLE TRANSMISSION FOR VEHICLE - A control device of a continuously variable transmission for a vehicle having a pair of variable pulleys with variable effective diameters of an input-side variable pulley and an output-side variable pulley and a transmission belt wound around between the pair of the variable pulleys, the continuously variable transmission respectively controlling an input-side thrust force in the input-side variable pulley and an output-side thrust force in the output-side variable pulley to set an actual gear ratio to a target gear ratio while preventing a slip of the transmission belt, the continuously variable transmission includes: a hydraulic control circuit capable of accurately controlling one of the input-side variable pulley and the output-side variable pulley in terms of thrust force as compared to the other, in the case that a target thrust force on the one side for assuring belt slip prevention of the both pulleys on the one side is set, based on a target thrust force on the one side, a target thrust force on the other side for achieving a target gear ratio on the other side being set, and a larger one being selected as the target thrust force on the one side out of a limit thrust force to a slip on the one side required for belt slip prevention on the one side, and a thrust force on the one side required for achieving a target gear ratio on the one side calculated based on a limit thrust force to a slip on the other side required for belt slip prevention on the other side. | 06-27-2013 |
20130274042 | CHAIN BELT-TYPE VARIABLE TRANSMISSION - A chain belt-type continuously variable transmission in which ratchet-type chain belts are wound on driving and driven pulley devices, each of which has a variable diameter, in order to control the shift ratio. Driving belt supports are disposed in a driving pulley device so as to radially contract and expand. Driven belt supports are disposed in a driven pulley device so as to radially contract and expand. Teeth in the front portions of the driving belt supports and the driven belt supports and teeth in the rear portions of the driving belt supports and the driven belt supports are oriented in opposite directions. Front and rear ratchet gears formed on the driving belt supports and the front and rear ratchet gears formed on the driven belt supports are oriented in opposite directions and are arranged in alternating positions without being formed at corresponding positions in a line. | 10-17-2013 |
20130324334 | BELT-DRIVEN CONTINUOUSLY VARIABLE TRANSMISSION - A belt-driven continuously variable transmission having a downsized torque cam assembly for creating forward thrust to push a movable sheave toward a fixed sheave. | 12-05-2013 |
20140011616 | BELT-DRIVEN CONTINUOUSLY VARIABLE TRANSMISSION - A belt-driven continuously variable transmission adapted to reduce a frictional resistance between the movable sheave and the rotary shaft. The pulley includes the fixed sheave rotated integrally with the rotary shaft, and the movable sheave engaged with the rotary shaft in a manner to slide axially and to be rotated integrally with the rotary shaft. The driving belt is applied to the belt groove formed between the movable sheave and the fixed shave to transmit torque. The transmission is provided with the a passage for delivering fluid to the engagement mechanism engaging the rotary shaft with the movable sheave while allowing relative axial movement therebetween. | 01-09-2014 |
20140031154 | BELT-DRIVEN CONTINUOUSLY VARIABLE TRANSMISSION - A belt-driven continuously variable transmission adapted to prevent a tilting motion of a sheave under high temperature. | 01-30-2014 |
20140038756 | Stepless Speed-Change Power Transmission for Vehicle - A stepless speed-change power transmission for a vehicle includes a driving pulley disposed on an input shaft, and including a fixed driving pulley half and a movable driving pulley half, a driven pulley disposed, on an output shaft and including a fixed driven pulley half and a movable driven pulley half, and an air guide unit. The air guide unit includes a curved first air guide wall and a curved second air guide wall that are disposed around the fixed driving pulley half to form first and second notches between the first and second air guide walls. The first notch guides air from the fixed driving pulley half onto the driven pulley. The second notch guides air from the fixed driving pulley half onto the movable driving pulley half. | 02-06-2014 |
20140094332 | FAST AND ACCURATE PNEUMATIC/HYDRAULIC LINEAR POSITION CHANGING MECHANISMS - Pneumatic/hydraulic assisted mechanisms that can be used to move an object of considerable weight in quick and accurate steps. Said mechanisms comprise of an index wheel mechanism that is rotated by pre-tensioned springs (see FIG. | 04-03-2014 |
20140128188 | BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION - Provided is a belt-type continuously variable transmission which may prevent a servo spool from sliding even when a movable sieve slides due to reduced pressure in a hydraulic cylinder. A hydraulic servo mechanism comprises a servo spool and a feedback spool, and contiguous members coming into contact with the feedback spool ( | 05-08-2014 |
20140141909 | FAST AND ACCURATE PNEUMATIC/HYDRAULIC LINEAR POSITION CHANGING MECHANISMS - Pneumatic/hydraulic assisted mechanisms that can be used to move an object of considerable weight in quick and accurate steps. Said mechanisms comprise of an index wheel mechanism that is rotated by pre-tensioned springs (see FIG. | 05-22-2014 |
20140274505 | DIAGNOSTIC DEVICE FOR SFHIT CONTROL ACTUATOR - A diagnostic device for a shift control actuator of a CVT includes: a variator; a chamber that is filled with and discharges hydraulic fluid for an upshift and a downshift, respectively; an upshift control valve for filling hydraulic fluid into the chamber; a downshift control valve for discharging hydraulic fluid from the chamber; a fail-safe valve for suspending the discharge of hydraulic fluid from the chamber when the upshift control valve is in a filling state; actuators for driving the upshift and downshift control valves; and a shift controller for controlling the actuators so that an actual shift ratio approaches a target ratio. The shift controller determines the state of the actuators with the information on the actual shift ratio when the controller instructs a downshift or an upshift. | 09-18-2014 |
20140329628 | HYDRAULIC CONTROL SYSTEM FOR AUTOMATIC TRANSMISSION - A hydraulic control system for an automatic transmission, in which a belt is applied to at least one pair of pulleys, and in which widths of belt grooves of the pulleys, or pressures to clamp the belt by the pulleys are controlled by hydraulic pressures applied to hydraulic chambers of the pulleys. The hydraulic control system is comprised of: a control valve that controls a delivery and a drainage of hydraulic fluid to/from the hydraulic chamber; and a drive frequency setting means that determines a drive frequency of a drive signal for actuating the control valves in such a manner that a phase of a local maximum value of amplitude of the drive signal is shifted from a phase of a local maximum value of amplitude of vibrations resulting from rotating the pulleys. | 11-06-2014 |
20140342860 | CONTINUOUSLY-VARIABLE TRANSMISSION AND CONTINUOUSLY-VARIABLE TRANSMISSION CONTROL METHOD - A continuously-variable transmission, which has a first pulley, which has a first fixed pulley and a first mobile pulley, a second pulley, which has a second fixed pulley and a second mobile pulley, and a drive force transmitting member, which is stretched between the first pulley and the second pulley, is provided, and this continuously-variable transmission has an indicated pressure calculation section, which calculates the indicated pressure of the first pulley, a stroke speed calculation section, which calculates the stroke speed of the first mobile pulley, and an oil pressure calculation section, which, when oil is discharged from an oil chamber, calculates the amount of increase of oil pressure in a first pulley oil chamber that increases compared to the indicated pressure due to the channel resistance of the discharge path, based on the channel resistance and the stroke speed, and a correction section, which, when oil is discharged from the first pulley oil chamber, subtracts the amount of increase of oil pressure from the first pulley pressure based on a target speed ratio and input torque, and corrects the indicated pressure of the first pulley. | 11-20-2014 |
20140357434 | HYDRAULIC CONTROL SYSTEM FOR A CONTINUOUSLY VARIABLE TRANSMISSION - A hydraulic control system for a CVT includes a pressure regulator subsystem, a ratio control subsystem, a torque converter control (TCC) subsystem, a clutch control subsystem, and is enabled for automatic engine start/stop (ESS) functionality. | 12-04-2014 |
20140371012 | HYDRAULIC CONTROL DEVICE AND VEHICLE CONTROL DEVICE - A hydraulic control device includes an electric pump configured to supply oil to a belt-type continuously variable transmission mechanism of a power transmission device through a hydraulic path based on driving of a motor, and an accumulator configured to accumulate oil inside by using the oil supplied by the electric pump and supplies the oil to a control system by discharging the accumulated oil through the hydraulic path. According to such a configuration, an increase in the sizes of the electric pump and the accumulator used for hydraulic control at the time of executing an idling stop function can be suppressed. | 12-18-2014 |
20140378251 | BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION - An input pulley, an output pulley, a belt wound across the pulleys, a hydraulic cylinder provided to the input pulley, and a hydraulic servo mechanism that controls an operation of the hydraulic cylinder are provided. The hydraulic servo mechanism includes: a valve chest facing an input side movable sheave; a servo spool slidably inserted in the valve chest, and switches an oil passage in communication with a hydraulic chamber of the hydraulic cylinder; and a feedback spool disposed in such a manner that one end comes into contact with the input side movable sheave a bearing disposed in between, and configured to switch the oil passage to maintain a slid position of the input side movable sheave at a position corresponding to a slid position of the servo spool. | 12-25-2014 |
20150080157 | ELEMENT FOR METALLIC BELT - An element | 03-19-2015 |
20150105194 | ELEMENT FOR METALLIC BELT - An element for a metallic belt in a continuously variable transmission capable of reducing misalignment while ensuring friction force in a small diameter state is provided. An element | 04-16-2015 |
20150148158 | CONTROL DEVICE FOR AUTOMATIC TRANSMISSION - A control device for an automatic transmission including a hydraulic actuator that is actuated on the basis of a hydraulic pressure supplied and a linear solenoid valve that controls the hydraulic pressure supplied to the hydraulic actuator on the basis of a driving current of a solenoid includes an ECU that executes current feedback control over a current value of the driving current that is flowed to the solenoid using at least a proportional term and an integral term on the basis of a deviation (ΔI) between a target current value (Itgt) and actual current value (Ir) of the solenoid such that the hydraulic pressure supplied to the hydraulic actuator becomes a target hydraulic pressure. The ECU increases a proportional gain (Kp) in the current feedback control as a fluid temperature (To) detected by a fluid temperature sensor increases. | 05-28-2015 |
20150316148 | Control System For A Continuously Variable Transmission - Control system for a continuously variable transmission with a first and a second pair of conical sheaves each with adjustable running radius, in which of each pair at least one sheave ( | 11-05-2015 |
20150316149 | CONTINUOUSLY VARIABLE TRANSMISSION WITH A HYDRAULIC CONTROL SYSTEM - A continuously variable transmission is provided with a drive belt ( | 11-05-2015 |
20150345632 | HYDRAULICALLY ACTUATED CONTINUOUSLY VARIABLE TRANSMISSION - A hydraulically actuated continuously variable transmission ( | 12-03-2015 |
20150369363 | HYDRAULIC PRESSURE SUPPLY APPARATUS FOR AUTOMATIC TRANSMISSION - A hydraulic pressure supply apparatus for automatic transmission having a first and a second regulator valves | 12-24-2015 |
20160047470 | CONTROL DEVICE FOR BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION - A control device for a belt-type continuously variable transmission CVT includes an engine | 02-18-2016 |
20160061318 | HYDRAULIC CONTROL DEVICE OF BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION - In a hydraulic control device of a belt-type continuously variable transmission that includes: a first hydraulic actuator that is provided in a primary pulley and reduces a width of a belt groove when hydraulic pressure is applied thereto; and a first control valve that regulates predetermined source pressure to be gear-change hydraulic pressure for setting or changing a gear change ratio and outputs the gear-change hydraulic pressure to the first hydraulic actuator, gear change equipment is included that regulates the source pressure to be the gear-change hydraulic pressure so as to regulate the hydraulic pressure of the first hydraulic actuator when the hydraulic pressure of the first hydraulic actuator is rapidly changed to change the width of the belt groove. | 03-03-2016 |
20160069435 | SHAFT SUPPORTING STRUCTURE OF BELT-DRIVEN CONTINUOUSLY VARIABLE TRANSMISSION - A shaft supporting structure of belt-driven continuously variable transmission is provided. The shaft supporting structure comprises a bearing holding the rotary shaft ( | 03-10-2016 |
20160131230 | BELT-DRIVEN CONTINUOUSLY VARIABLE TRANSMISSION - A belt-driven continuously variable transmission adapted to prevent an occurrence of belt slippage is provided. The continuously variable transmission comprises a hydraulic actuator formed on a back side of a movable sheave to change a belt groove between a fixed sheave and a movable sheave, and a torque cam assembly adapted to convert a torque into an axial thrust force by a relative rotation between a pair of cam members contacted to each other. In the belt-driven continuously variable transmission, a piston fitted onto a shaft of the driven pulley while allowing to rotate relatively therewith and to reciprocate thereon is integrated with one of the cam members of driven side and with an output gear for outputting torque of the pulley. The cam member of drive side is fixed in an axial direction on a driven shaft to be rotated integrally therewith. | 05-12-2016 |
20160153479 | HYDRAULIC ADJUSTING DEVICE | 06-02-2016 |