Class / Patent application number | Description | Number of patent applications / Date published |
477044000 | Belt-type | 36 |
20080242500 | Continuously Variable Transmission and Straddle-Type Vehicle - When performing kick down, during re-acceleration after decelerating, the engine sometimes races unnecessarily, and a smooth acceleration feeling is not obtained. During control by a kick down mode, when accelerating after a throttle has been fully closed, a control target value is set so as not to pass to a Low side of a limit value of the control target value used during re-acceleration. As a result, racing of the engine is inhibited. | 10-02-2008 |
20080305926 | Continuously Variable Transmission and Straddle Type Vehicle - A continuously variable transmission reduces slips between a primary sheave and a V-belt when decelerating. A target value setting section sets a control target value for control by a control device. In the target value setting section, a normal mode, a kick down mode set to be in a Low gear range lower than in the normal mode, and a restriction value given in a throttle fully closed state are provided. The control device controls the continuously variable transmission based upon the kick down mode provided in the target value setting section, in response to an operation of a kick down operator. The control device controls a gear ratio of the continuously variable transmission not to vary to a Low gear range lower than the restriction value provided in the target value setting section. | 12-11-2008 |
20090176618 | APPARATUS AND METHOD FOR CONTROLLING CONTINUOUSLY VARIABLE TRANSMISSION AND PROGRAM FOR PERFORMING THE CONTROL METHOD - An apparatus and method for controlling a CVT (continuously variable transmission), and a program for executing the control method that reduces a transmission shock during a braking operation. When a foot brake switch is turned on and a vehicle speed is less than or equal to a threshold speed, the ECU increases a clamping pressure applied to a transmission belt to a pressure level higher than a normal pressure. When the vehicle speed falls to or below the threshold speed when the foot brake switch is turned on, the ECU prohibits an increase in the clamping pressure applied to the transmission belt. | 07-09-2009 |
20100075799 | CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREOF - When a through speed ratio, which is an overall speed ratio of a variator and a subtransmission mechanism, varies from a larger speed ratio than a mode switch speed ratio to a smaller speed ratio than the mode switch speed ratio, a gear position of the subtransmission mechanism is changed from a first gear position to a second gear position. The mode switch speed ratio is set at a through speed ratio obtained when the speed ratio of the variator is a Highest speed ratio and the gear position of the subtransmission mechanism is the first gear position. | 03-25-2010 |
20100075800 | CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREOF - When a through speed ratio, which is an overall speed ratio of a variator and a subtransmission mechanism, varies from a larger speed ratio than a mode switch speed ratio to a smaller speed ratio than the mode switch speed ratio, a gear position of the subtransmission mechanism is changed from a first gear position to a second gear position and the speed ratio of the variator is modified to a large speed ratio side. The mode switch speed ratio is set midway between a low speed mode Highest speed ratio and a high speed mode Lowest speed ratio. | 03-25-2010 |
20100075801 | CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREOF - When a through speed ratio, which is an overall speed ratio of a variator and a subtransmission mechanism, varies from a larger speed ratio than a mode switch speed ratio to a smaller speed ratio than the mode switch speed ratio, a gear position of the subtransmission mechanism is changed from a first gear position to a second gear position and the speed ratio of the variator is modified to a large speed ratio side. The mode switch speed ratio is set to be equal to a high speed mode Lowest speed ratio. | 03-25-2010 |
20100197454 | SLIPPAGE DETECTION SYSTEM AND METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSIONS - A slippage detection system for a continuously variable transmission capable of continuously changing a gear ratio between an input rotation speed of an input member and an output rotation speed of an output member is provided. The slippage detection system compares a difference between an actual gear ratio calculated from measurement values of the input rotation speed and the output rotation speed and a target gear ratio with a predetermined reference value, and determines slippage in the continuously variable transmission when the difference exceeds the reference value at least a predetermined number of times in a predetermined period of time. | 08-05-2010 |
20100197455 | SLIPPAGE DETECTION SYSTEM AND METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSIONS - A slippage detection system for a continuously variable transmission capable of continuously changing a gear ratio between an input rotation speed of an input member and an output rotation speed of an output member is provided. The slippage detection system calculate a sum of differences between an actual gear ratio calculated from measurement values of the input rotation speed and the output rotation speed and a target gear ratio over a predetermined period of time, and determines slippage in the continuously variable transmission based on the sum of differences. | 08-05-2010 |
20100248894 | CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREOF - A continuously variable transmission includes a variator capable of varying a speed ratio continuously, and a subtransmission mechanism provided in series with the variator. On the basis of an operating condition of a vehicle, a transmission controller sets a destination through speed ratio, which is an overall speed ratio of the variator and the subtransmission mechanism to be realized in accordance with the operating condition, and controls the variator and the subtransmission mechanism on the basis thereof. When shifts are prohibited in the subtransmission mechanism, the destination through speed ratio is limited to a speed ratio range that can be realized only by a shift in the variator. | 09-30-2010 |
20100248895 | CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREOF - The transmission controller changes the gear position of the subtransmission mechanism and varies the speed ratio of the variator in an opposite direction to a speed ratio variation direction of the subtransmission mechanism when the actual through speed ratio passes a predetermined mode switch line. When the improvement in the shift response of the continuously variable transmission is determined to be required and the actual through speed ratio passes the mode switch line from a Low side to the High side, the transmission controller increases a shift speed of the subtransmission mechanism compared with a normal coordinated shift. | 09-30-2010 |
20120021870 | TORQUE DOWN CONTROL APPARATUS AND METHOD FOR AUTOMOTIVE VEHICLE - In torque down control apparatus and method for an automotive vehicle, an upper limit value of a drive force of a prime mover is reduced to a predetermined value when a predetermined condition is established, the upper limit value of the drive force is increased at a predetermined speed to recover the upper limit value of the drive force from the predetermined value, the recovery is limited when an accelerator opening angle is smaller than a predetermined opening angle than a case where the accelerator opening angle is equal to or larger than the predetermined opening angle during the recovery of the upper limit value of the drive force, and the limitation is relieved when a vehicle speed is equal to or higher than a predetermined vehicle speed than a case where the vehicle speed is lower than the predetermined vehicle speed. | 01-26-2012 |
20120108389 | VEHICLE CONTROL APPARATUS - A vehicle control apparatus is configured to set a desired speed of an engine to be inputted to a CVT based on a vehicle speed and an accelerator opening AP, calculate a desired output of the engine based on the accelerator opening; calculate a correction coefficient based on the vehicle speed, and calculate a corrected desired output by correcting the desired output with the correction coefficient such that the vehicle speed reaches a regulatory vehicle speed when the accelerator opening AP reaches a fully-opened position, i.e., to vary the characteristics of the accelerator opening in accordance with the vehicle speed in the vicinity of the regulatory vehicle speed. | 05-03-2012 |
20140235404 | TRANSMISSION FOR OUTDOOR POWER EQUIPMENT - An engine includes a throttle, a drive shaft, a driven shaft, a continuously variable transmission coupling the drive and driven shafts and providing a mechanical advantage therebetween, and a governor that operates the throttle as a function of rotational speed of the driven shaft. The transmission includes a first wheel coupled to the drive shaft, a second wheel coupled to the driven shaft, and a belt coupling the first and second wheels, wherein a working diameter of the second wheel changes as a function of torque acting on the driven shaft, thereby automatically changing the mechanical advantage in response to torque experienced by the driven shaft, and wherein a working diameter of the first wheel changes a function of tension in the belt. | 08-21-2014 |
20160123463 | Maximum Axial Position Changing RPM Methods - Methods that can be used to “limit the maximum shaft rpm (speed) at which axial position changing of a variator mounted on it is performed to a “maximum axial position changing rpm value” for all variator mounted shafts of a CVT, while still allowing a safe driving experience and also allowing the driver to use the full power of the engine when needed | 05-05-2016 |
20160201798 | CONTROL DEVICE AND CONTROL METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION | 07-14-2016 |
477045000 | Fluid pressure control | 21 |
20080214353 | Hydraulic system for controlling a belt-driven conical-pulley transmission - A hydraulic system for controlling a belt-driven conical-pulley transmission of a motor vehicle, wherein the transmission has a variably adjustable transmission ratio. The hydraulic system includes a first valve arrangement to control a contact pressure in the belt-driven conical-pulley transmission, a second valve arrangement to control the transmission ratio of the belt-driven conical-pulley transmission, and a hydraulic energy source to supply the hydraulic system with hydraulic energy. In order to provide an improved hydraulic system, the system includes a third valve arrangement for controlling a forward clutch and a reverse clutch, and for controlling a parking lock. | 09-04-2008 |
20080269012 | HYDRAULIC PRESSURE CONTROL DEVICE FOR CONTINUOUSLY VARIABLE TRANSMISSION - A hydraulic pressure control device is provided that that controls hydraulic pressure of a clutch supplying torque to a continuously variable transmission while the vehicle is stopped and in a running range. The hydraulic pressure control device has an control section that estimates a clutch engagement hydraulic pressure for the clutch based on initially rotational movement of a primary pulley of the continuously variable transmission, and then controls regulation of the hydraulic pressure to the clutch to a designated pressure that is no greater than the clutch engagement hydraulic pressure, when the vehicle is stopped and in the running range, so that the torque from the engine does not rotate a secondary pulley of the continuously variable transmission. | 10-30-2008 |
20080300103 | OPEN-LOOP TORQUE CONTROL WITH CLOSED-LOOP FEEDBACK - A variator torque control system adjusts a variator output so that the actual output torque of the variator closely matches an expected output torque. In an example, pressure values of an existing torque control map are supplemented in real time with calculated pressure supplement values based on the current operation of the variator. The pressure supplement value for each mapped pressure value may be derived based on a prior application of the same or another map value. | 12-04-2008 |
20090170657 | Hydraulic supply system for a hydraulically actuated automatic transmission - A hydraulic supply system for a hydraulically actuated automatic transmission, in particular for a belt-driven conical-pulley transmission. The system includes a primary pump driven by a primary drive system to provide pressure in a supply line connected to a regulating valve. The supply line is connected through a pilot valve to a control line in which a control valve is situated, with which the pressure that determines the setting of a transmission ratio adjusting valve is set. An auxiliary pump driven by an auxiliary drive system that is separate from the primary drive system includes an outlet line connected to the control line through a first valve that opens in the direction of the control line, and is connected to the supply line through a second valve that opens in the direction of the supply line. | 07-02-2009 |
20100035721 | Controller of contionously variable transmission, flow control method, and flow controller - A sensor is placed in proximity to a chain of a continuously variable transmission, and a pulse is output by detecting pins. Moreover, there is provided a control section that determines theoretical speed of the chain from numbers of input and output rotations of the continuously variable transmission; that determines actual speed of the chain from an output from the sensor; that determines slippage from the speeds; and that controls clamping force of the continuously variable transmission so as to make slippage close to a reference value. | 02-11-2010 |
20100160111 | CONTROL APPARATUS FOR BELT-TYPE CONTINUOUSLY-VARIABLE TRANSMISSION - A belt continuously-variable transmission control apparatus includes: a belt continuously-variable transmission including; a primary pulley arranged to receive a torque from a driving source; a secondary pulley arranged to output the torque to driving wheels; a belt wound around the primary pulley and the secondary pulley; a hydraulic pressure control section configured to control a hydraulic pressure of one of the primary pulley and the secondary pulley which is a capacity side, and thereby to bring the belt, the primary pulley and the secondary pulley to a slip state; and a torque control section configured to control the torque of the driving source, and thereby to bring the slip state to a predetermined slip state. | 06-24-2010 |
20100167872 | VEHICLE DRIVE APPARATUS - A vehicle drive apparatus for supplying oil pressure to a hydraulic servo at restart of an engine. The vehicle drive apparatus includes an accumulator that accumulates the oil pressure, an electromagnetic switching valve that retains oil pressure of the accumulator when an oil pump is stopped, a switching valve control unit that controls opening and closing of the electromagnetic switching valve, and a restart determining unit that determines whether or not to restart the vehicle drive source from a stopped state. When it is determined by the restart determining unit to restart the vehicle drive source, the switching valve control unit is started so as to supply the oil pressure accumulated in the accumulator to the hydraulic servo. As a result, engine friction engagement elements are quickly engaged to enable starting of a vehicle. | 07-01-2010 |
20100210414 | CONTROLLER FOR VEHICLE POWER TRANSMISSION APPARATUS - A discharge capacity reduction device that, while neutral control is performed, reduces the discharge capacity of an oil pump that is driven by the engine is provided, so that the load applied to the oil pump is reduced. Thus, the load applied to the engine is reduced and it is possible to further reduce the engine output, so that it is possible to further improve fuel economy. | 08-19-2010 |
20120135837 | VEHICLE CONTROL SYSTEM AND CONTROL METHOD THEREOF - A time required until the friction element is completely engaged is delayed when a switch from a non-driving position to a driving position is detected or when the engine automatic stop condition no longer holds until the differential rotation of the friction element disappears after the engine automatic stop condition holds as compared with the case where the switch from the non-driving position to the driving position is detected or the engine automatic stop condition no longer holds after the differential rotation of the friction element disappears. | 05-31-2012 |
20130260960 | CONTROL DEVICE AND CONTROL METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION - A control device for continuously variable transmission is composed of a continuously variable transmission mechanism and friction engagement elements, and includes a control unit for decreasing, during a coast stop control to stop a driving power source in a traveling state of a vehicle, a transmission torque capacity transmittable by the friction engagement elements to fall under a belt capacity being torque transmittable by a belt using a holding force of pulleys. | 10-03-2013 |
20140221154 | VEHICLE CONTROL DEVICE - A vehicle control device for controlling a vehicle with an oil pump to be driven by rotation generated by a drive source and transmitted thereto and a continuously variable transmission including a power transmission member mounted between two pulleys includes coast stop control means configured to execute a coast stop control in which the drive source is stopped during vehicle running when a predetermined condition holds, and hydraulic pressure control means configured to execute a pulley pressure control in which a hydraulic pressure supplied to the pulley is increased such that frictional heat generated between the pulley and the power transmission member does not exceed upper limit frictional heat, below which the pulley or the power transmission member is not degraded, when the coast stop control is stopped, the drive source is restarted and the hydraulic pressure is supplied from the oil pump. | 08-07-2014 |
477046000 | Ratio change controlled | 10 |
20080227594 | Hydraulic system for controlling a belt-driven conical-pulley transmission - A hydraulic system for controlling a belt-driven conical-pulley transmission of a motor vehicle, wherein the transmission has a variably adjustable transmission ratio. The hydraulic system includes a first valve arrangement to ensure a contact pressure in the belt-driven conical-pulley transmission, a second valve arrangement to control the transmission ratio of the belt-driven conical-pulley transmission, and a hydraulic energy source to supply the hydraulic system with hydraulic energy. In order to provide an improved hydraulic system, the system a third valve arrangement for controlling a forward clutch and a reverse clutch. | 09-18-2008 |
20090082172 | BELT CONTINUOUSLY VARIABLE TRANSMISSION AND LINE PRESSURE CONTROL METHOD THEREOF - In an area where a required primary pressure is higher than a required secondary pressure after a line pressure is controlled to an oil pressure obtained by adding a margin to a higher oil pressure of the required primary pressure and the required secondary pressure, the line pressure is gradually reduced such that the line pressure does not fall below the required primary pressure by adding a negative correction amount to the line pressure when a predetermined condition is established. Further, the line pressure is controlled back to the oil pressure obtained by adding the margin when the condition ceases to be established. When the condition ceases to be established (S | 03-26-2009 |
20090270222 | Method of controlling continuous variable transmission - A method of controlling a transmission (e.g., CVT) comprises dividing the entire range of an input torque to a transmission from an engine into a plurality of partial torque ranges; setting the maximum torque of the respective partial torque ranges as a representative torque of the respective partial torque ranges; and setting a target hydraulic pressure, which is to be provided to the transmission, according to the representative torque and a predetermined target speed ratio. The method allows a target hydraulic pressure for controlling a transmission to be maintained constant even though an input torque from an engine is changed, and allows the transmission to maintain a speed ratio constant, thereby ensure a stable and smooth ride. | 10-29-2009 |
20090280952 | Method for operating a continuously variable conical pulley transmission - A method for operating a continuously variable conical pulley transmission having two conical pulley sets that are operatively coupled by a endless torque-transmitting means, so that the transmission ratio between the conical pulley sets is continuously variable. A hydraulic medium is supplied to the continuously variable conical pulley transmission in a stop phase of a start/stop operation by means of a pump unit that includes a pump that is driven by an electric motor. The electric motor is controlled as a function of the temperature of the hydraulic medium. | 11-12-2009 |
20120108390 | CONTROLLER AND CONTROL METHOD OF BELT TYPE-CONTINUOUSLY VARIABLE TRANSMISSION - A control device and a control method for a belt type-continuously variable transmission capable of preventing a belt slip from occurring by restricting that an input torque to the belt type-continuously variable transmission is excessive relative to a belt clamp force when returning from a belt slip control to a normal control are provided are provided. The control device includes a primary pulley ( | 05-03-2012 |
20120115678 | 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 ( | 05-10-2012 |
477047000 | Engine coast braking | 1 |
20080254937 | AUTOMATIC TRANSMISSION SHIFT CONTROL APPARATUS - An automatic transmission shift control apparatus is basically provided with deceleration operating condition detecting section, a first shift phase control section and a second shift phase control section. The deceleration operating condition detecting section detects a vehicle coasting condition. The first shift phase control section control a gear ratio of an automatic transmission installed in a vehicle using a first shift phase control after detecting the vehicle coasting condition has started such that a deceleration rate of the vehicle enters a deceleration region. The second shift phase control section control the gear ratio of the automatic transmission after the first shift phase control ends such that the deceleration rate of the vehicle enters a constant speed region. | 10-16-2008 |
477048000 | With electric valve control | 3 |
20080227595 | Hydraulic system for controlling a belt-driven conical-pulley transmission - A hydraulic system for controlling a belt-driven conical-pulley transmission of a motor vehicle having a variably adjustable transmission ratio, and having an electrical actuation system for overall control of the hydraulic system, and a hydraulic parking lock-release system to control a parking lock. In order to provide an improved hydraulic system, the parking lock includes a self-retention system in the event of an electrical power failure. | 09-18-2008 |
477049000 | Duty ratio control | 2 |
20080220935 | Hydraulic system for controlling a belt-driven conical-pulley transmission - A hydraulic system for controlling a belt-driven conical-pulley transmission of a motor vehicle, wherein the transmission has a variably adjustable transmission ratio. The hydraulic system includes a first valve arrangement to control a contact pressure in the belt-driven conical-pulley transmission, a second valve arrangement to control the transmission ratio of the belt-driven conical-pulley transmission, and a hydraulic energy source to supply the hydraulic system with hydraulic energy. In order to provide an improved hydraulic system, the system includes a third valve arrangement for controlling a forward clutch and a reverse clutch. | 09-11-2008 |
20100099535 | CONTINUOUSLY VARIABLE TRANSMISSION CONTROL APPARATUS - In an embodiment of the continuously variable transmission control apparatus of the present invention, even if an actual gear change ratio RATIO overshoots a target gear change ratio RATIO T and an upshift gear change instruction (DS | 04-22-2010 |