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| Number | Title | Issue Date |
| 8157681 | Control device and control method for continuously variable transmission When a speed ratio (ip) at a stopping time of the vehicle cannot be stored, an operating position of a step motor (27) is initialized to a home position such that a primary pulley pressure (Ppri) is completely drained, a secondary pulley pressure (Psec) is in... | 04/17/2012 |
| 8147364 | 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 workin... | 04/03/2012 |
| 8133140 | Control apparatus for continuously-variable transmission of vehicle A control apparatus for an automatic transmission includes a control section having a target secondary pressure setting section configured to set a target secondary pressure within a strength limit of the belt, and an operation switching section configured to switch... | 03/13/2012 |
| 8133141 | Hydraulic system The invention relates to a hydraulic system for actuating a continuously variable belt-driven conical-pulley transmission having two conical pulleys encircled by an endless torque-transmitting means, each of which comprises two conical disks, one of which is axially... | 03/13/2012 |
| 8105191 | Control apparatus and method for continuously variable transmissions The line hydraulic pressure setting portion sets the line hydraulic pressure PL, which is the base pressure for the required shift control pressure Pin and the required belt clamping pressure Pd, based on the higher of the required pressures Pin and Pd. A... | 01/31/2012 |
| 8100791 | 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 m... | 01/24/2012 |
| 8100790 | Conical disk pair for a belt-driven conical-pulley transmission A sensing device integrated into a conical disk pair includes a sensing piston that is axially movable relative to the input shaft over a radially stepped guide surface that is formed on a shaft on which the sensing device is carried, and a corresponding opposing st... | 01/24/2012 |
| 8096906 | Continuously variable transmission and control method for continuously variable transmission When a vehicle decelerates rapidly, a lower limit secondary pulley pressure (Plmt) is calculated on the basis of a primary pulley rotation speed (Npri) detected by a primary pulley rotation sensor. When a deceleration speed (Gdata) is greater than a predetermined de... | 01/17/2012 |
| 8092325 | Continuously variable belt transmission for a vehicle A continuously variable belt transmission for a vehicle which can generate a cancellation hydraulic pressure for cancellation with a simple construction, as well as urge a movable sheave in the direction for producing a belt pressing force even at the time a vehicle... | 01/10/2012 |
| 8066595 | Hydraulic control system for vehicular power transmitting mechanism A hydraulic control system for a vehicular drive system including a hydraulically operated belt-and-pulley type continuously variable transmission and a hydraulically operated frictional coupling device engaged for running of a vehicle, the hydraulic control system ... | 11/29/2011 |
| 8062156 | Control device for continuously variable transmission Safety as well as the minimum driving performance is secured by preventing abrupt down-shifting if a line pressure valve or a primary pressure control valve fails. A line pressure path connected to an oil pump is connected with a line pressure control valve. A first... | 11/22/2011 |
| 8029395 | 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 ... | 10/04/2011 |
| 8002654 | Control system for belt-type continuously variable transmission A control system for controlling a belt-type continuously variable transmission having a pulley capable of varying its groove width to which a belt is applied, in which the pulley is provided with an oil chamber to which the oil pressure is fed so that the pulley cl... | 08/23/2011 |
| 7993225 | 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 r... | 08/09/2011 |
| 7967707 | Belt-driven conical-pulley transmission with improved towing suitability An input-side drive arrangement for a belt-driven conical-pulley transmission includes an input shaft that is rigidly connected to an axially fixed disk, and an axially movable disk that can be shifted axially on the shaft and is rotationally fixed to the shaft. A t... | 06/28/2011 |
| 7955202 | Hydraulically controlled cone disc continuously-variable transmission The invention concerns a continuously variable cone disc transmission with sets of discs mounted on drive and driven shafts. The sets of discs are each hydraulically adjustable axially in their distance from each other whereby the traction train circulating between ... | 06/07/2011 |
| 7951026 | Oil pressure control apparatus In one embodiment, an oil pressure control apparatus includes a belt-driven continuously variable transmission, a lockup clutch provided in a torque converter, a primary regulator valve that regulates a line oil pressure that becomes a source pressure of oil pressur... | 05/31/2011 |
| 7951025 | Power unit for motorcycle A motorcycle including a power transmission device including a continuously variable transmission having a belt wound around a drive pulley and around a driven pulley and a hydraulically-operated clutch provided on at least one of a drive pulley shaft and a driven p... | 05/31/2011 |
| 7931551 | Hydraulic control apparatus and method for belt-type continuously-variable transmission A hydraulic control apparatus includes a continuously-variable transmission; a line-pressure control section configured to produce a line pressure by adjusting a discharge pressure of an oil pump; a first hydraulic-pressure control section configured to adjust a fir... | 04/26/2011 |
| 7922610 | Line pressure control device and method for belt type continuously variable transmission In a line pressure control device for a belt type continuously variable transmission according to this invention, when a line pressure is feedback-controlled to equal a target line pressure which is equal to or greater than the larger of oil pressures supplied to a ... | 04/12/2011 |
| 7918753 | Hydraulic control unit A hydraulic control unit (18), for a power transmission system having an oil receiving device (26,37), which controls a power transmitting condition of the power transmission system, and an oil reserving device for feeding the oil to the oil receiving ... | 04/05/2011 |
| 7819764 | Speed change control device for belt type continuously variable transmission and control method thereof A speed change control device for a belt type continuously variable transmission has a speed change control unit (32) which controls an oil pressure for determining a speed ratio of the continuously variable transmission (10) by operating a step motor ... | 10/26/2010 |
| 7811187 | Continuously variable transmission A continuously variable transmission has a primary pulley having a primary movable sheave that is capable of moving to change a groove width of the primary pulley, and a secondary pulley having a secondary movable sheave that is capable of moving to change a groove ... | 10/12/2010 |
| 7806791 | Continuously variable transmission and control method thereof A positional deviation ERRstep of a step motor 27 is calculated on the basis of a reference model step StepMdl, an actual speed ratio-corresponding step Bstep, and an added value obtained by adding together a target deviation GTstep, calculated in accordance ... | 10/05/2010 |
| 7803076 | Belt type continuously variable transmission A belt type continuously variable transmission is provided with two pulley shafts arranged in parallel a predetermined distance apart from each other, a movable sheave provided on each pulley shaft and being able to slide in an axial direction thereof, a fixed sheav... | 09/28/2010 |
| 7794344 | Continuously-variable-transmission control device and straddle-type vehicle A continuously-variable-transmission control device having high control response and stability, reduced processing load on a control device and V-belt wear recognition. The width of the V-belt is calculated on the basis of a position of the primary sheave, a length ... | 09/14/2010 |
| 7771301 | Pressure supply to a continuously adjustable automatic transmission in particular a clasping transmission A pressure supply between a variator shaft and a pressure chamber (6) for the axial displacement of the mobile disc of a pair of conic pulleys of a continuously adjustable automatic transmission, which includes a longitudinal borehole (7) and radial bo... | 08/10/2010 |
| 7753814 | Belt type continuously variable transmission A belt type continuously variable transmission in which a pulley shaft is supported by bearings provided at two positions that are apart from each other in an axial direction of the pulley shaft and a supply oil passage for supplying hydraulic fluid to a pulley hydr... | 07/13/2010 |
| 7699729 | Speed ratio change control device and method for belt type continuously variable transmission This invention is a speed ratio change control device for a belt type continuously variable transmission that a minimum generated pressure of the primary pressure is estimated on the basis of a displacement speed of the movable sheave of the primary pulley and an op... | 04/20/2010 |
| 7686715 | Hybrid clamping mechanism for belt continuously variable transmission and method of use thereof A hybrid clamping mechanism for a belt continuously variable transmission (CVT) is disclosed. A pulley having adjustable belt-engagement surfaces allow for a variable effective diameter of the belt when about the pulley. A clamping spring disposed to bias the belt-e... | 03/30/2010 |
| 7677996 | Device for supplying a drive element The invention relates to a device for supplying a hydraulic medium to a rotatably mounted drive element in a transmission case, the hydraulic medium being routed to a channel in the drive element by way of at least one channel in a coaxially adjacent element which c... | 03/16/2010 |
| 7677997 | Double piston and belt type continuously variable transmission A double piston and belt type continuously variable transmission comprises a primary pulley provided with a primary piston chamber and a primary clamp chamber; a secondary pulley provided with a secondary piston chamber and a secondary clamp chamber; and an endless ... | 03/16/2010 |
| 7666110 | Control system for power transmission mechanism A control system of a power transmission mechanism, in which a transmission torque capacity between transmission members varies according to a pressure to be applied to the transmission members and in which the pressure to be applied to the transmission members is c... | 02/23/2010 |
| 7651422 | Shift control system in belt-type continuously variable transmission When a speed of a vehicle is less than 8 km/h, an upshift determination condition is established, an idle switch signal is turned off, and a downshift is detected, an operating speed of the step motor is limited. Thereby, since the operating speed of the step motor ... | 01/26/2010 |
| 7445572 | Hydraulic pressure control apparatus and method for continuously variable transmission In hydraulic pressure control apparatus and method for a continuously variable transmission, a line pressure of the continuously variable transmission is developed with a working oil supplied from an oil pump as an original pressure, and a command pressure is set to... | 11/04/2008 |
| 7402118 | Control device for controlling V-belt continuously variable transmission A control device for controlling a continuously variable transmission (5) is disclosed. The control device has an oil pressure control unit (100) which supplies an oil pressure to a primary pulley (10) and secondary pulley (11) based on a... | 07/22/2008 |
| 7387589 | Shift control apparatus of belt type continuously variable transmission A shift control apparatus of a belt type continuously variable transmission is comprised of a controller which is arranged to set a first hydraulic pressure controlled variable based on a first target transmission ratio determined based on a vehicle traveling condit... | 06/17/2008 |
| 7361108 | Continuously variable transmission A continuously variable transmission with two conical disk pairs on the input side and two conical disk pairs on the output-side that are connected with each another by two parallel endless torque-transmitting members in a drive mechanism. In one form of the transmi... | 04/22/2008 |
| 7356399 | Failure determination system for stepless speed changer and failure determination device for start clutch There is provided a failure determination system for a continuously variable transmission of a belt type, which is capable of determining failure of control valves for performing speed varying operation, and enhancing maintainability. An ECU controls a transmission ... | 04/08/2008 |
| 7350439 | Transmission case cover with radial inflow channel A case cover assembly to which a sheave for a continuously variable transmission is mountable for rotation about an axis is configured to provide fluid communication between the sheave and a pressurized fluid source. The case cover assembly includes a conduit defini... | 04/01/2008 |
