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Class 477/46 - Ratio change controlled


Subclass of Class 477 - Interrelated power delivery controls, including engine control
Definition: Subject matter wherein the regulation of the fluid pressure is effective
No. of patents: 277
Last issue date: 03/27/2012


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NumberTitleIssue Date
8142330Continuously 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 subtransmissi...
03/27/2012
8083640Apparatus 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...
12/27/2011
7935023Transmission device and control method for continuously variable transmission
In the case where a belt return of a continuously variable transmission is not determined when the vehicle speed has become equal to or lower than a threshold value, control that causes a hydraulic actuator to have an intermediate pressure by setting a duty of a dut...
05/03/2011
7892141Speed ratio change control device and method for belt type continuously variable transmission
A speed ratio change control device for a belt type continuously variable transmission calculates a maximum thrust that can be generated by the primary pulley on the basis of an upper limit value of the line pressure, calculates an upper limit value of a shift speed...
02/22/2011
7686735Continuously variable power-branched transmission, and a method for regulating a continuously variable power-branched transmission
A continuously variable power-branched transmission for a motor vehicle, including an input shaft, a variable speed drive unit having pairs of conical disks and a continuously variable transmission ratio, a gear system, and an output shaft. Two control clutches conn...
03/30/2010
7568996Speed-ratio control apparatus for vehicular continuously variable transmission
A speed-ratio control apparatus for controlling a speed ratio of a continuously variable transmission of a vehicle, such that an actual input speed of the transmission coincides with a target input speed, the apparatus including an acceleration-requirement determini...
08/04/2009
7559872Continuously variable transmission controller
A continuously variable transmission is mounted on a vehicle capable of selecting plural drive modes and changes a target engine speed between drive modes. A pulley ratio is controlled by a motor. An ECU for transmission control includes a calculation section which ...
07/14/2009
7553256Hydraulic control apparatus for belt-drive CVT of vehicle
A hydraulic control apparatus of a belt-drive CVT, controlling a transmission ratio by changing respective effective rotation radii of driving and driven pulleys, includes vehicle information sensors; hydraulic actuators changing the respective rotation radii; and a...
06/30/2009
7435200Hydraulic 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
7387589Shift 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
7384372Pulley thrust control device for continuously variable transmission
A control device for a belt continuously variable transmission with a primary pulley, a secondary pulley and a V-belt, includes an oil pressure control unit which applies a thrust to each of the primary pulley and the secondary pulley, and a controller. The controll...
06/10/2008
7356399Failure 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
7338406Shift control apparatus and method for belt type continuously variable transmission
In shift control apparatus and method for a belt-type continuously variable transmission, a shift ratio between the primary pulley and the secondary pulley is controlled, a shift speed is detected, the shift speed being a variation quantity of the shift ratio per un...
03/04/2008
7320654Ratio 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
7303505Method for controlling rate of change of ratio in a continuously variable transmission
A method for controlling a rate of change of speed ratios in a continuously variable transmission (CVT) includes sensing a vehicle speed, sensing an engine speed, and sensing a change in a position of an accelerator pedal. The method includes determining a desired e...
12/04/2007
7300380Cooperative 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
7291078Control of belt-type continuously variable transmission
A gear change control system of a belt-type continuously variable transmission includes: a movable pulley piston chamber for causing a thrust force to a movable pulley varying a groove width of primary pulley and secondary pulley. The movable pulley piston chamber h...
11/06/2007
7280907Method of enhancing accelerator pedal safety interlock feature
A method for an accelerator pedal safety in a vehicle with an internal combustion engine having an Electronic Control Unit, (ECU), said method comprising: starting the engine; determining whether the engine is running; determining whether there is a request for addi...
10/09/2007
7278939Power transmission
A power transmission comprises a belt type continuously variable ratio-change mechanism CVT and a fixed ratio rotational transmission mechanism GT, which transmit the rotational driving force of a primary shaft 1 rotationally driven by an engine to a counters...
10/09/2007
7258636Method 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
7229372Slippage 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
7211013Hydraulic 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
7192383Control 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
7192372Hydraulic pressure sensor failure control system for belt-type continuously variable transmission
In case a primary hydraulic pressure sensor is normal, when reverse rotation of pulleys is detected a primary pulley (Plpri) torque capacity is calculated from a primary pressure detected by the primary hydraulic pressure sensor. When the primary hydraulic pressure ...
03/20/2007
7189184Control 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
7179196Input 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
7174245Method 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
7169070Transmission 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
7142967Features of main control computer for a power machine
The present invention is directed to a computer based control system for controlling hydraulic and electromechanical actuators on a power machine, such as a skid steer loader. The computer based control system is configured to implement a number of features to enhan...
11/28/2006
7140991Shift control system, and control apparatus and method for belt-type continuously variable transmission
A shift control system includes a belt-type continuously variable transmission (CVT) with primary and secondary pulleys, a shift actuator that regulates an oil pressure supplied to the primary or secondary pulley to vary an actual transmission ratio of the CVT, and ...
11/28/2006
7117071Hybrid vehicle drive control apparatus, and control method of hybrid vehicle drive apparatus and program thereof
A hybrid vehicle drive apparatus including an electric power generator mechanically connected to the engine, a drive motor driven by at least one of an electric current generated by the electric power generator and an electric current supplied from a battery; a dete...
10/03/2006
7110869Hybrid transmission member speed determination, sensor diagnostics and fault recovery
A hybrid powertrain has a transmission including a motor and a sensor for sensing rotation of the transmission output member. Motor speed signals are available from the motor controller. Speed signals representative of output speed are calculated from both the speed...
09/19/2006
7101311Control system for continuously variable transmission of motorcycle
A control system for a continuously variable transmission of a motorcycle, which is capable of improving the steerability of the motorcycle in a low-speed range of the motorcycle. The motorcycle includes a centrifugal clutch mechanism disposed between the transmissi...
09/05/2006
7097587Ratio selection method for a continuously variable transmission
A gear ratio selection method for a transmission in a motor vehicle includes detecting a power request, detecting a vehicle speed of the motor vehicle, and providing an engine speed of the motor vehicle. A first desired engine speed is calculated from a first variog...
08/29/2006
7099722Work machine attachment control system
A control system is provided for a work machine having a plurality of removably attachable work tools. The control system has at least one operator input device that is configured to control a movement speed of the work machine. The control system also has a tool re...
08/29/2006
7099838Hedging exchange traded mutual funds or other portfolio basket products
A system for determining a basket of financial instruments for hedging investment risk in actively managed exchange traded funds is described. The system uses a trusted computer system and includes a computer storage medium storing a computer program product. The pr...
08/29/2006
7090601Tractor hitch transmission
The invention involves an agricultural machine with a drive train to be coupled onto the power take-off shaft of a tractor, with a transmission integrated into the drive train. In these types of agricultural machines it is frequently necessary, after starting at a h...
08/15/2006
7073615System and method for operating an electric motor by limiting performance
A method and system for limiting motor performance in a hybrid electric vehicle system. During a condition in a primary drivetrain, the method limits performance of an electric motor used in an auxiliary drivetrain to control energy consumed from a battery in the au...
07/11/2006
7070537Combination of cylinder deactivation with flywheel starter generator
An engine control system and method incorporates an FSG to reduce engine speed variation for a displacement on demand engine. The control system transitions between a normal operating mode wherein all cylinders of the engine are operating and a cylinder deactivation...
07/04/2006
7072754Operator selectable engine assist braking
An operator selectable engine braking assist system is provided that allows the operator of a vehicle to select the amount of engine braking assist provided. An engine braking assist selector is provided to allow the operator to select a level of engine braking assi...
07/04/2006
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