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| Number | Title | Issue Date |
| 8070650 | Hydraulic control system A hydraulic control system of a vehicle power train having a belt-type continuously variable transmission, and a hydraulic lock-up clutch, includes: a line pressure control valve; first and second control valves; first, second and third electromagnetic valves; and a... | 12/06/2011 |
| 7537543 | Speed change control device for belt type continuously variable transmission When a throttle is substantially fully open and startup is not underway, a CVT control unit (20) controls a speed ratio in accordance with a fully open speed change line. When the throttle is substantially fully open and startup is underway, the CVT control u... | 05/26/2009 |
| 7356403 | Control apparatus and process for internal combustion engine A control apparatus for an internal combustion engine with an exhaust recirculation system includes an acceleration request sensing section to sense a driver's acceleration request; and an engine operating condition sensing section to sense a current engine operatio... | 04/08/2008 |
| 7356402 | Controller for engine having component A required-generate-current (RGC) is calculated according to conditions of the electric loads and a charging state of the battery. The required-alternator-drive-torque (RADT) is estimated according to the required-generate-current (RGC). A required engine torque is ... | 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 |
| 7313473 | Control device and control method for a vehicle At the time of the change-speed, by correcting the torque reducing portion of an output shaft during the change-speed, the revolution number of an input shaft is controlled on the basis of the corrected torque reduction correcting value. Also, the torque of said inp... | 12/25/2007 |
| 7270095 | Apparatus and method for controlling internal combustion engine An engine body includes a plurality of cylinders, and the intake valve lift-amount of each cylinder is changed based on the engine operating state. A pressure sensor continuously detects the intake pressure, which is the pressure in an intake pipe, to detect the int... | 09/18/2007 |
| 7264571 | Method and apparatus for controlling a vehicle power train containing a continuously variable transmission A method and apparatus to save fuel and to make efficient use of the possibilities of a power train including a transmission having a continuously variable transmission ratio. If the vehicle velocity exceeds a prescribed velocity the fuel supply to the engine is shu... | 09/04/2007 |
| 7247124 | Transmission control based on knock level An automated method for controlling a vehicle having an engine and a transmission includes sensing knock activity in the engine. A transmission ratio applicable to the transmission is selected based on the sensed knock activity. This method allows a vehicle to be op... | 07/24/2007 |
| 7227272 | Control apparatus for electrical generator of motor vehicle A control apparatus such as an ECU, that controls the generator of a vehicle, measures the engine rotation speed and generator rotation speed while the engine is idling, and calculates and stores the ratio of the speed values. Thereafter when the vehicle is being dr... | 06/05/2007 |
| 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 |
| 7197385 | Method and apparatus for adjusting a contact force in a motor vehicle drive train A method and apparatus for regulating the contact force between two frictionally-engaged torque-transmitting components of a motor vehicle drive system. A contact force between an endless torque-transmitting device and a pair of conical disks of a continuously varia... | 03/27/2007 |
| 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 |
| 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 |
| 7044260 | Vacuum actuated direction and speed control mechanism An electronic control system for shifting the direction in an off road vehicle such as a lawn and garden tractor or a utility vehicle is disclosed. The control system consists of a control mechanism that activates a control circuit that in turn activates an actuator... | 05/16/2006 |
| 7037235 | Speed change ratio control unit for continuously variable transmission A speed change ratio control unit for a continuously variable transmission that uses a step motor as a driving actuator of a speed change control valve that compares a variable ASTP representing a step position of the step motor and a step position BSTP of the step ... | 05/02/2006 |
| 7022043 | Method for controlling slip on a clutch assigned to an automatic transmission The invention is directed to a method for controlling the operation of a clutch (19) which coacts with an automatic transmission stage (17). A variator controller (16) is assigned to the automatic transmission stage (17) and a contact-for... | 04/04/2006 |
| 6960153 | Clutch engagement control of automatic transmission A clutch engagement control device controls the engagement of a forward clutch (32) and reverse clutch (33) in an automatic transmission connected to an engine (70) in a vehicle. An inhibitor switch (56) outputs a range signal in accordan... | 11/01/2005 |
| 6945907 | Method and apparatus for controlling the operation of a motor vehicle drive train A target engine rotational speed depending at least upon the position of an accelerator pedal position and a motor vehicle speed is determined in a method for controlling the operation of a motor vehicle drive train having a drive motor and a branched power transmis... | 09/20/2005 |
| 6939264 | Method for controlling a continuously variable transmission The transmission ratio of a stepless transmission is adjusted in accordance with a selectable closed loop control strategy, whereby the transmission ratio is infinitely variable between two transmission ratio end values by actuator forces effective on axially adjust... | 09/06/2005 |
| 6916269 | System and method of controlling line pressure for V-belt type continuously variable transmission In a V-belt type CVT, an actual-shift-ratio corresponding operated position of a step motor is calculated through conversion of an actual shift ratio expressed by the rotational-speed ratio between primary and secondary pulleys. A displacement amount is calculated b... | 07/12/2005 |
| 6837825 | Shift controlling apparatus and shift controlling method for continuously variable transmission A shift controlling apparatus for a continuously variable transmission changing of an input side rotational element driven by an engine via a power transmitting element to an output side rotational element, has, a rapid acceleration determination unit for determinin... | 01/04/2005 |
| 6695742 | Control device for a continuously variable transmission A CVT has a torque convener (T/C) speed ratio calculation section that determines the speed ratio from the engine speed and the primary pulley speed. The calculation section then calculates the torque ratio from the speed ratio. An input torque estimation... | 02/24/2004 |
| 6691012 | Shift control apparatus for continuously variable transmission and shift control method therefor A shift control apparatus for a continuously variable transmission has a target primary pressure setting unit provided a target primary pressure according to a speed ratio deviation between an actual speed ratio and a target speed ratio; a shift control v... | 02/10/2004 |
| 6547693 | System for hydraulic transmission regulation of a CVT The invention proceeds from a system for generating a signal for hydraulically adjusting the transmission ratio of a continuously variable transmission in a motor vehicle. Here, a valve is provided which influences the hydraulic connection from a pressure... | 04/15/2003 |
| 6546324 | System and method incorporating dynamic feedforward for integrated control of motor vehicle steering and braking A control system for a motor vehicle subsystem comprises a reference model and a feedforward controller. The reference model computes desired states of the subsystem. The feedforward controller computes a first control value based on input from the refere... | 04/08/2003 |
| 6459978 | Method and apparatus to control continuously variable transmission of motor vehicle A method and apparatus for controlling a continuously variable transmission of a motor vehicle includes a controller that controls the speed ratio of the continuously variable transmission in accordance with a predetermined shift condition. The method and... | 10/01/2002 |
| 6434434 | Electronic control for a transmission control system An electro-hydraulic control system with electronic control for a gearbox includes at least one actuator element device for receiving an analog measuring signal from the actuator element(s), a device for forming an actual actuator value from the analog me... | 08/13/2002 |
| 6345226 | Speed ratio control device for vehicle When a slip control system is not operating, a speed ratio control device uses a sensor detected vehicle speed for speed ratio control, and when the slip control system is operating, it uses an estimated vehicle speed for speed ratio control. It is determ... | 02/05/2002 |
| 6338695 | Vehicular transmission control system After the engine rotational speed Ne has become below a reference rotaional speed Neo, which is lower than an idling rotational speed of the engine, and after the pressure PL of oil passages 103a and 103b has begun to decrease, for a predetermined time, t... | 01/15/2002 |
| 6244986 | Shift control apparatus for continuously variable transmission A shift control apparatus of a continuously variable transmission for a vehicle comprises sensors for detecting operating conditions of the transmission and a motor connected to the transmission. A controller of the shift control apparatus stores differen... | 06/12/2001 |
| 6246940 | Speed change controller for automatic transmission In a vehicle transmission wherein plural speed change ratios from a largest speed change ratio to a smallest speed change ratio are selectively applied according to a command input by a driver, a real speed change ratio of the transmission is detected. It... | 06/12/2001 |
| 6220985 | Speed change ratio controller for stepless automatic transmission A speed change ratio of a stepless transmission of a vehicle is controlled so as to decrease the greater the vehicle speed, but this control of speed change ratio is suppressed when the drive wheels are slipping. This prevents misinterpretation of the sli... | 04/24/2001 |
| 6199005 | Vehicle drive force control device A slip of drive wheels of a vehicle driven via a continuously variable transmission is suppressed due to fuel cut of a multi-cylinder engine. The speed change response characteristics of the transmission are made to vary according to the engine rotation s... | 03/06/2001 |
| 6157885 | Vehicle motive force control system A system for controlling motive force of a vehicle having an engine and an automatic transmission connected to the engine to transmit engine torque to a drive shaft of the vehicle, wherein a control mode is selected from among a plurality of predetermined... | 12/05/2000 |
| 6146308 | Creep torque control of infinitely variable transmission In a neutral N control for substantially equalizing axial forces to act on two pulleys, a belt type continuously variable transmission (CVT) self-converges into the gear neutral point (GN) at which the output shaft RPM takes the value 0. When the converge... | 11/14/2000 |
| 6135916 | Process for controlling the pressure of a CVT during a standing start A pressure controlling system for a CVT of the belt with bevelled pulley type is proposed in which, on detection of a shift from the neutral or park position, the pressure in the primary and secondary pulleys is raised to a first level. This ensures that ... | 10/24/2000 |
| 6086507 | Device and method for adjusting the ratio of transmission in a CVT The invention proceeds from an arrangement or a method for adjusting the transmission ratio of a continuously variable belt transmission having a drive end and an output end. The drive end and the output end have at least one axially displaceable element ... | 07/11/2000 |
| 6086506 | Method of controlling a continuously variable transmission automatically or as a driver-controlled manual stepped transmission The invention relates to a method for controlling a continuously variable transmission with an electrohydraulic control, a selector device, and a controllable engaging clutch of a motor vehicle, especially one powered by an internal combustion engine, wit... | 07/11/2000 |
