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| Number | Title | Issue Date |
| 8057354 | Method and system for controlling rate of change of ratio in a continuously variable transmission Systems and methods for efficiently and effectively controlling the rate of change of ratio, not simply the ratio, in a CVT. By controlling the rate of change of ratio, the acceleration or deceleration of a vehicle can be controlled in an efficient manner. Furthermo... | 11/15/2011 |
| 7713165 | Hydraulic control system for continuously variable transmission for hybrid electric vehicle A hydraulic control system for a continuously variable transmission for a hybrid electric vehicle enhances operability as speed changes are made based on input torques and engine rotational speeds since pressure of a primary pulley is controlled based on engine rota... | 05/11/2010 |
| 7713166 | Method and system for controlling rate of change of ratio in a continuously variable transmission Systems and methods for efficiently and effectively controlling the rate of change of ratio, not simply the ratio, in a CVT. By controlling the rate of change of ratio, the acceleration or deceleration of a vehicle can be controlled in an efficient manner. Furthermo... | 05/11/2010 |
| 7678016 | Control apparatus for vehicle A vehicle having, in a power transmission path, a continuously variable transmission mechanism and a clutch mechanism, whose torque capacity is smaller than that of the continuously variable transmission mechanism. The vehicle also has a control system to prevent a ... | 03/16/2010 |
| 7654935 | Shift control system and shift control method for continuously variable transmission A maximum flow calculating unit calculates a maximum amount of hydraulic fluid that can flow into or out of an input-side hydraulic cylinder when a shift control command signal is set to a reference DUTY value, based on an estimated valve pressure difference calcula... | 02/02/2010 |
| 7568995 | Shift control device and shift control method of vehicular continuously variable transmission A hydraulic control circuit that shuts off an oil passageway so that the ratio between the shift pressure and the belt clamping pressure is not caused to be in a predetermined relationship even when a speed change ratio control valve and/or a speed change ratio cont... | 08/04/2009 |
| 7435200 | Hydraulic pressure control apparatus of belt-drive continuously variable transmission for automotive vehicle A hydraulic pressure control apparatus of a belt-drive continuously variable transmission (CVT) for an automotive vehicle, includes a vehicular information detector that detects engine-and-vehicle operating conditions and a hydraulic actuator that regulates primary ... | 10/14/2008 |
| 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 |
| 7377878 | Method and apparatus for determining a slip value describing the torque transmission reliability of a belt-driven conical-pulley transmission A method for determining a slip value describing the reliability of torque transmission between two conical disk pairs of a continuously variable transmission. The conical disk pairs are frictionally engaged by an endless torque-transmitting component. The contact p... | 05/27/2008 |
| 7371204 | Method and system for the reduction of the jerk caused by range shifting of a CVT transmission with power division A method and a system for reducing a jerk produced by the range shift of a transmission with a power division arrangement. The transmission includes a variable speed drive in the form of a continuously variable transmission, and a pair of planetary gear sets and a p... | 05/13/2008 |
| 7370516 | Method for estimating transmission input torque A method for estimating transmission input torque is provided. The method includes identifying a plurality of measurable characteristics that influence transmission input torque. Thereafter, transmission input torque values are measured on a sample powertrain operat... | 05/13/2008 |
| 7354377 | Continuously variable transmission A belt continuously variable transmission includes a primary pulley (1), a secondary pulley (2), a belt (3), a hydraulic pump (21), a speed ratio control valve (13) that regulates hydraulic pressure from the hydraulic pump (21 | 04/08/2008 |
| 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 |
| 7331900 | Shift control apparatus and method for continuously variable transmission The shift control apparatus for a continuously-variable transmission includes a primary pulley; a secondary pulley connected with the primary pulley by a belt; a shift actuator that varies a speed ratio; a line pressure adjusting that adjusts a line pressure; a seco... | 02/19/2008 |
| 7320654 | Ratio control system for an automatic transmission in a vehicle A procedure for the control of ratio-change occurrences of an automatic transmission in a motor vehicle, which vehicle possesses a hydraulic system with at least two hydraulic pressure branches (3, 9) with different hydraulic pressures, wherein in a first hyd... | 01/22/2008 |
| 7316283 | Automatic transmission controller for hybrid vehicle An automatic transmission controller for a hybrid vehicle of the present invention is used for the hybrid vehicle being a four-wheel drive vehicle and including an engine and a generator motor on a front wheel side of the hybrid vehicle and a traction motor on a rea... | 01/08/2008 |
| 7308882 | Oil feeding system of engine An oil feeding system of an engine equipped with a transmission configured to change a rotational speed of rotation of a crankshaft and to output the rotation, including an oil pump configured to be driven in cooperation with the rotation of the crankshaft, an oil p... | 12/18/2007 |
| 7300380 | Cooperative control system for prime mover and continuously variable transmission of vehicle 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 clampin... | 11/27/2007 |
| 7267632 | Control of belt-drive continuously variable transmission A controller (50) controls the supply of oil pressure to a primary pulley (41) and a secondary pulley (42) of a belt-drive continuously variable transmission (1) in accordance with the depression amount of an accelerator pedal (81)... | 09/11/2007 |
| 7261672 | Method and system for controlling rate of change of ratio in a continuously variable transmission Systems and methods for efficiently and effectively controlling the rate of change of ratio, not simply the ratio, in a CVT. By controlling the rate of change of ratio, the acceleration or deceleration of a vehicle can be controlled in an efficient manner. Furthermo... | 08/28/2007 |
| 7258636 | Method and apparatus for performing a slippage regulation in a continuously variable transmission A method and apparatus for carrying out a drive belt slippage regulation in a continuously variable transmission. A driving disk set and a driven disk set are connected together for torque transfer by an endless torque-transmitting element in which a power ratio bet... | 08/21/2007 |
| 7243011 | Hybrid transmission launch algorithm A launch system for a hybrid vehicle includes a pump, an electronic throttle, a sensor, and a hybrid control module. The pump is driven by an internal combustion engine and provides pressurized fluid to a transmission. The electronic throttle selectively adjusts air... | 07/10/2007 |
| 7228783 | Pressure control system for a torque-transmitting mechanism The present invention provides a pressure control system having a control solenoid with plurality of coils disposed therein, and operable to provide a plurality of pressure gain characteristics to a torque-transmitting mechanism. By selectively energizing the indivi... | 06/12/2007 |
| 7229372 | Slippage prevention apparatus of belt-drive continuously variable transmission for automotive vehicle During a downshift of a belt-drive continuously variable transmission, occurring owing to vehicle deceleration, a CVT controller foretells that a slippage between a drive belt and each of primary and secondary variable-width pulleys tends to occur, when a primary pu... | 06/12/2007 |
| 7225071 | Vehicle transmission control system Clutch pressure is reduced when a vehicle is stopped with an engine (1) in an idling state. Once a turbine rotation speed increases to a predetermined rotation speed, the clutch pressure is increased to an initial pressure. After the initial pressure is reach... | 05/29/2007 |
| 7222005 | Abnormal oil pressure reduction determination device for vehicle transmission An abnormal oil pressure reduction determining device has an oil pressure sensor which detects a real oil pressure, a sensor which detects a vehicle running state, and a controller which sets an oil pressure command value for an oil pressure control mechanism. The c... | 05/22/2007 |
| 7211013 | Hydraulic control apparatus for V-belt type continuously variable transmission There is provided a hydraulic control apparatus for a belt CVT, which is comprised of a pulley pressure control section that controls the line pressure in accordance with the oil amount balance of an oil pump based on the engine speed and the oil temperature during ... | 05/01/2007 |
| 7207920 | V-belt continuously variable transmission for a vehicle engine A control device for controlling a V-belt CVT (Continuously Variable Transmission) which is connectible to a vehicle engine and comprises a primary variator and a secondary variator. The control device has a plurality of sensors which generate electronic measured va... | 04/24/2007 |
| 7201684 | Speed-changing hydraulic pressure control system for belt-type continuously variable transmission A belt-type continuously variable transmission having a forward clutch is incorporated with a speed-changing hydraulic pressure control system. The control system includes an engaging pressure regulating device for outputting an engaging pressure for the forward clu... | 04/10/2007 |
| 7192371 | System and method of controlling V-belt type continuously variable transmission A system for controlling a V-belt type CVT is constructed to change a first position of a step motor to a second position of the step motor corresponding to a second target shift ratio if it is determined that the primary-pulley pressure fails to reach a predetermin... | 03/20/2007 |
| 7192383 | Control apparatus and method for automotive vehicle in which a belt-type continuously variable transmission is equipped with a belt slip preventive feature In control apparatus and method for an automotive vehicle, the vehicle having a continuously variable transmission associated with a vehicular engine and including a belt that transmits a revolution of a primary pulley to a secondary pulley that is enabled to make a... | 03/20/2007 |
| 7188717 | Control apparatus for power train including continuously variable transmission A control apparatus for a power train including a continuously variable transmission and a clutch arranged in series with the continuously variable transmission is provided in which an engaging pressure of the clutch is first reduced until a slip occurs, and is then... | 03/13/2007 |
| 7189184 | Control system for continuously variable transmission of vehicle The control system comprises: an operating state changing mechanism for an operating state of the prime mover in response to a satisfaction of learning execution condition of the clamping pressure; a torque change suppressing mechanism for suppressing a change in a ... | 03/13/2007 |
| 7184882 | Vehicle navigation system A GPS-based vehicle navigation system and method for properly displaying direction guide information, which represents a target direction, regardless of forward motion or backward motion. The system calculates the current position of the vehicle, and senses the trav... | 02/27/2007 |
| 7179196 | Input torque control system of belt-type continuously variable transmission for vehicle A transmission controller commands a demand torque of an engine to an engine controller according to an actual secondary pulley pressure that is detected by a secondary pulley pressure sensor when a vehicle speed is 0 km/h and a state wherein gear ratio is equal to ... | 02/20/2007 |
| 7176643 | Motor control apparatus Before an amount of play in a rotation transmitting system is learned, for selecting a gear range, an overshooting control process is performed to cause the angular displacement of a motor to overshoot a target gear range position and then reverse the electric motor... | 02/13/2007 |
| 7174246 | Method and system for regulating the torque-transmission capacity of a frictionally engaged, torque transmitting assembly A method and system for regulating the torque transmitting capacity of a frictionally-engaged torque-transmitting assembly located in the drive train of a motor vehicle. The torque-transmitting assembly has an input and an output, the values of which, such as input ... | 02/06/2007 |
| 7174245 | Method and system for identifying the degree of a slip of a belt part of a belt transmission The present invention relates to a method for detecting a slip (s) of a belt part of a belt transmission, especially of a CVT transmission, having a transmission rpm ratio (ji). According to the invention, a slip of the belt part is detected by evaluating the... | 02/06/2007 |
| 7169070 | Transmission controller of V-belt type continuously variable automatic transmission There are provided with a determination means for determining whether or not the correlation between the pressure value detected by the primary pressure sensor and the pressure value detected by the secondary pressure sensor is an actually impossible relation (Step ... | 01/30/2007 |
| 7159583 | Technique for drive current stabilization of an automotive ignition system Drive current stabilization is achieved through the management of a drive current. The drive current may include a control current that is provided to a control terminal of a switch, a current limit input current that is provided to a current limit circuit associate... | 01/09/2007 |
