| JATCO Ltd Patent applications |
| Patent application number | Title | Published |
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| 20130098728 | AUTOMATIC TRANSMISSION CONTROLLER - An automatic transmission is provided with a frictional engagement member that is operated by hydraulic pressure for shifting the automatic transmission, and includes an air vent opening. An automatic transmission controller includes a pressure regulator and a control section. The pressure regulator regulates the hydraulic pressure in response to a hydraulic pressure control signal. The control section performs an air vent operation of venting air from the frictional engagement member through the air vent opening. The air vent operation includes: a preliminary operation of setting the hydraulic pressure control signal to a preliminary pulse indicative of a preliminary value of pressure, wherein the preliminary value is lower than a normal value of pressure; and a normal operation of setting the hydraulic pressure control signal to a normal pulse indicative of the normal value, wherein the normal pulse follows the preliminary pulse. | 04-25-2013 |
| 20130013160 | 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. | 01-10-2013 |
| 20120316092 | LUBRICANT COMPOSITION FOR CONTINUOUSLY VARIABLE TRANSMISSION - A lubricating oil composition for a continuously variable transmission contains at a specific content: (A) a mineral oil or PAO having a sulfur content of 0.03 mass % or less and a kinematic viscosity at 100 degrees C. from 1.5 mm | 12-13-2012 |
| 20120309591 | HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION - An accumulator ( | 12-06-2012 |
| 20120302402 | AUTOMATIC TRANSMISSION AND HYDRAULIC CONTROL METHOD THEREFOR - A transmission controller operates an electrical oil pump in a steady mode, in which an operating load of the electrical oil pump is set at a steady load, during an idle stop, but operates the electrical oil pump in a high-pressure mode, in which the operating load of the electrical oil pump is higher than the steady load, for a predetermined period when an engine stops rotating. | 11-29-2012 |
| 20120302400 | AUTOMATIC TRANSMISSION AND CONTROL METHOD THEREFOR - When the temperature of oil supplied to an electrical oil pump is detected and the oil temperature is lower or higher than normal oil temperature, a gradient threshold value smaller than that at normal oil temperature is set, a gradient of a road surface on which a vehicle is stopped is detected, and an idle stop is prohibited when the detected gradient of the road surface is larger than the set gradient threshold value. | 11-29-2012 |
| 20120298462 | CONTROL DEVICE AND CONTROL METHOD FOR TRANSMISSION MECHANISM - In the case of a return from an idle stop control in which an engine is automatically stopped, a hydraulic pressure is so supplied that a low brake is set in a completely engaged state and a high clutch is set in a slip interlock state where the high clutch is not completely engaged. | 11-29-2012 |
| 20120252612 | DEVICE AND METHOD FOR CONTROLLING A BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION FOR A VEHICLE - A vehicle belt-type continuously variable transmission expands the operating range in which belt slip control is permitted with maintained estimated accuracy of a belt slip condition, to reduce drive energy consumption owing to a reduction in belt friction. It includes a primary pulley and a secondary pulley around which a belt is wound to control gear ratio by controlling primary and secondary hydraulic pressures, a belt slip control means for controlling secondary hydraulic pressure according to a phase difference between oscillation components due to oscillation included in an actual gear ratio and in an actual secondary hydraulic pressure, and a transmission speed limiting means for determining whether or not to limit vehicle acceleration according to a predetermined acceleration limit permitting condition and limiting a transmission speed to less than a predetermined value when determining to limit the vehicle acceleration. | 10-04-2012 |
| 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 |
| 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 |
| 20120108374 | BELT-BASED, CONTINUOUSLY-VARIABLE TRANSMISSION CONTROL DEVICE AND CONTROL METHOD - Provided are control device and method for a belt type continuously variable transmission which can improve control stability of secondary hydraulic pressure with the estimated accuracy of a belt slip condition during belt slip control ensured. The device has a primary pulley ( | 05-03-2012 |
| 20120108373 | 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 ( | 05-03-2012 |
| 20110098896 | AUTOMATIC TRANSMISSION AND PROTECTION METHOD THEREOF - When temperature increase promotion processing (for example, prohibiting lockup application and prohibiting shifts to a high gear position) is started while an initial value of an ATF temperature is in a low temperature region, an ATCU determines whether to terminate the temperature increase promotion processing on the basis of a current ATF temperature, and when the temperature increase promotion processing is started while the initial value of the ATF temperature is in an extremely low temperature region, the ATCU determines whether to terminate the temperature increase promotion processing on the basis of a duration of the temperature increase promotion processing. When the temperature increase promotion processing is determined to be complete, the ATCU terminates the temperature increase promotion processing. | 04-28-2011 |
| 20110015840 | SHIFT CONTROL OF AUTOMATIC TRANSMISSION - A subtransmission mechanism | 01-20-2011 |
| 20110015839 | CONTROL OF AND CONTROL METHOD FOR VEHICLE CONTINUOUSLY VARIABLE TRANSMISSION - A control device for a vehicle continuously variable transmission | 01-20-2011 |
| 20110015838 | SHIFT CONTROL OF CONTINUOUSLY VARIABLE TRANSMISSION - A continuously variable transmission | 01-20-2011 |
| 20110015837 | CONTROL OF AND CONTROL METHOD FOR VEHICLE CONTINUOUSLY VARIABLE TRANSMISSION - A control device for a vehicle continuously variable transmission | 01-20-2011 |
| 20110015836 | SHIFT CONTROL OF CONTINUOUSLY VARIABLE TRANSMISSION - A speed ratio of a continuously variable transmission mechanism | 01-20-2011 |
| 20110015835 | CONTROL OF AND CONTROL METHOD FOR VEHICLE CONTINUOUSLY VARIABLE TRANSMISSION - A control device for a vehicle continuously variable transmission | 01-20-2011 |
| 20110015033 | CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREOF - The transmission controller performs a non-coordinated shift, in which the gear position of the subtransmission mechanism is modified from the second gear position to the first gear position at a higher speed than when the gear position of the subtransmission mechanism is modified by a coordinated shift while permitting a deviation between the through speed ratio and the target through speed ratio, instead of the coordinated shift when it is determined that the second speed kick down shift is to be performed. | 01-20-2011 |
| 20100318270 | CONTROL APPARATUS OF DRIVING FORCE IN CASE OF BELT SLIPPING FOR VEHICLE EQUIPPED WITH V-BELT CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREOF - A control apparatus of a driving force in case of belt slipping includes a belt slip control detecting unit adapted to detect that the belt slip control is in execution, a belt contact radius ratio calculating unit adapted to calculate a belt contact radius ratio of the V-belt to the pulleys, and a power source output torque determining unit adapted to determine a target power output torque according to the belt contact radius ratio in execution of the belt slip control in response to signals from the belt slip control detecting unit and the belt contact radius ratio calculating unit. | 12-16-2010 |
| 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 |
| 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 |
| 20100248886 | 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. When an actual through speed ratio passes a predetermined mode switch speed ratio, a transmission controller performs a coordinated shift in which a gear position of the subtransmission mechanism is changed and a speed ratio of the variator is varied in an opposite direction to a speed ratio variation direction of the subtransmission mechanism. When the rapid deceleration is determined to be underway, the transmission controller decreases a speed ratio variation amount of the variator in the direction of a High side accompanied by a downshift of the subtransmission mechanism compared with the coordinated shift. | 09-30-2010 |
| 20100248875 | CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREOF - A transmission controller permits a 2-1 shift, in which a gear position of a subtransmission mechanism is changed from a second speed to a first speed, when an accelerator pedal has been depressed to or above a predetermined opening. The gear position of the subtransmission mechanism is changed from the second speed to the first speed when an actual through speed ratio passes a mode switch line from a High side to a Low side while the 2-1 shift is permitted in the subtransmission mechanism. | 09-30-2010 |
| 20100228454 | CONTROL APPARATUS AND METHOD FOR AUTOMATIC TRANSMISSION - In control apparatus and method for an automatic transmission, a gear shift state of a stepwise variable transmission mechanism is controlled to a target gear shift state by releasing a first engagement section according to a reduction in a capacity of the first engagement section and, simultaneously, by engaging a second engagement section according to an increase in the capacity of the second engagement section, in accordance with a torque inputted to the stepwise variable transmission mechanism and, during an inertia phase, either one of the first and second engagement sections functions as a gear shift state control side engagement section and the capacity of a gear shift state non-control side engagement section which is the other engagement section is increased when determining that it is impossible to make the gear shift state follow up the target gear shift state at the gear shift state control side engagement section. | 09-09-2010 |
| 20100228450 | CONTROL APPARATUS OF AUTOMATIC TRANSMISSION - A control apparatus of an automatic transmission has an engagement part, a power-ON/OFF state judgment section and a control section controlling a capacity of the engagement part. The control section compares an actual input revolution speed difference absolute value of an absolute value of a difference between an input revolution speed when engaged and an actual input revolution speed with a target input revolution speed difference absolute value of an absolute value of a difference between the input revolution speed when engaged and a target input revolution speed, then a deviation is determined by subtracting the target input revolution speed difference absolute value from the actual input revolution speed difference absolute value. When the deviation is positive, the capacity is increased. When the deviation is negative, the capacity is reduced. When the deviation is zero, a previous capacity that is set before the comparison of the both absolute values is maintained. | 09-09-2010 |
| 20100228449 | CONTROL SYSTEM OF AUTOMATIC TRANSMISSION - A control system controls an automatic transmission. The automatic transmission comprises a stepwise variable transmission section that includes a plurality of frictional elements and establishes a desired speed by a shift change disengaging one of the frictional elements and engaging the other of the frictional elements and a continuously variable transmission section that establishes a desired speed continuously. The control system makes a speed change control of the continuously variable transmission section cooperate with a change of an input rotation speed of the stepwise variable transmission section. The control system is configured to carry out during the shift change of the stepwise variable transmission section, judging whether a delivery of a torque from a disengaging side frictional element to an engaging side frictional element is completed or not; and starting the speed change control of the continuously variable transmission section upon judgment of the completion of the delivery of the torque regarding that an inertial phase has started. | 09-09-2010 |
| 20100227736 | CONTROL APPARATUS AND METHOD FOR AUTOMATIC TRANSMISSION - A control apparatus for an automatic transmission includes a stepwise variable transmission mechanism; a power ON/OFF state judging section; and a shift control section configured to control the stepwise variable transmission mechanism to a target rotational speed by disengaging the first engagement portion and engaging the second engagement portion in accordance with a torque inputted to the stepwise variable transmission mechanism, the shift control section being configured to engage one of the first engagement portion and the second engagement portion which has a function to suppress a variation of an input rotational speed of the stepwise variable transmission mechanism which is generated by a switching of the power ON/OFF state when the power ON/OFF state is switched at the shift control of the stepwise variable transmission mechanism, and to disengage the other of the first engagement portion and the second engagement portion. | 09-09-2010 |
| 20100222971 | CONTROL APPARATUS AND METHOD FOR AUTOMATIC TRANSMISSION SYSTEM - A control apparatus for an automatic transmission system having a serial arrangement of a stepwise variable automatic transmission mechanism and a continuously variable automatic transmission mechanism, the control apparatus being disposed in the automatic transmission system and performing a shift control of the continuously variable automatic transmission mechanism in accordance with variation in transmission ratio of the stepwise variable automatic transmission mechanism, the control apparatus including a control section configured to execute a retardation processing upon shift control of one of the continuously variable transmission mechanism and the stepwise variable transmission mechanism which has a smaller response delay of an actual transmission ratio from a target transmission ratio than that of the other transmission mechanism. | 09-02-2010 |
| 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 |
| 20090221395 | AUTOMATIC TRANSMISSION - An automatic transmission is provided with three planetary gear units and five friction elements that establish at least six forward speeds and one reverse speed by engaging different combinations of three out of five friction elements simultaneously. In the automatic transmission, an output shaft is always connected to a first ring gear of the first planetary gear unit. A second ring gear of the second planetary gear unit is always fixed. A first carrier of the first planetary gear unit and a third ring gear of the third planetary gear unit are connected together to form a first rotating member. A second sun gear of the second planetary gear unit and a third carrier of the third planetary gear unit are connected together to form a second rotating member. | 09-03-2009 |
| 20090143184 | AUTOMATIC TRANSMISSION - An automatic transmission is provided with three planetary gear units and five friction elements. The first planetary gear unit includes a first sun gear that is always fixed, a first carrier supporting a first pinion in meshed engagement with the first sun gear and a first ring gear in meshed engagement with the first pinion. The first to fifth friction elements are operatively arranged with respect to the first, second and third planetary gear units to selectively establish at least seven forward speeds and one reverse speed by combining simultaneous engagement of two out of five friction elements for transmitting torque from the input shaft to the output shaft. | 06-04-2009 |
| 20090133995 | INHIBITOR SWITCH AND MANUFACTURING METHOD THEREOF - An inhibitor switch for detecting a shift position of a select lever is provided with: a terminal block fixed in a transmission case of an automatic transmission; a contact plate provided in the terminal block; an operating portion configured to cooperatively move with the select lever and to move along the contact plate; a movable contact formed on the operating portion and configured to slide on the contact plate to form an electric circuit according to a contact position between the contact plate and the movable contact; at least one disconnecting portion formed in the contact plate and cut at a plurality of positions after the contact plate is provided in the terminal block for interrupting electrical conduction; and at least one set of a plurality of disconnecting holes for cutting the disconnecting portion and formed in the terminal block by primary molding. The disconnecting holes respectively correspond to the plurality of positions at which the disconnecting portion is cut. The plurality of disconnecting holes are sealed by secondary molding after the disconnecting portion is cut. | 05-28-2009 |
| 20090106961 | Roller burnishing apparatus with pressing-force detecting device - There is disclosed a roller burnishing apparatus including a first member moved relative to an object to be burnished, a second member movable relative to the first member in a relative movement direction, a burnishing roller held by the second member such that the burnishing roller is rotatable, a biasing device which biases with a biasing force the second member relative to the first member in one of two opposite directions along the relative movement direction, and a pressing-force detecting device that detects a pressing force with which the burnishing roller is pressed against the object and which is based on the biasing force of the biasing device. | 04-30-2009 |
| 20090023552 | AUTOMATIC TRANSMISSION CONTROL APPARATUS - An automatic transmission control apparatus is provided with a brake switch, a brake fluid pressure detecting section, a range position detecting section, a neutral control section and a prohibiting section. The brake switch is configured to output an on-signal when a brake pedal is depressed and otherwise output an off-signal. The brake fluid pressure detecting section is configured to detect a brake fluid pressure corresponding to a brake pedal depression force. The range position detecting section is configured to detect if a traveling range of an automatic transmission is selected. The neutral control section is configured to start a neutral control that puts the automatic transmission into a neutral state when the brake fluid pressure detected by the brake fluid detecting section exceeds a start threshold value while the range position detecting section detects that the traveling range is selected, and to end the neutral control when the brake fluid pressure falls below an end threshold value while the neutral control is being executed, with the start and end threshold values being set to values that are higher than the brake fluid pressure occurring when the brake switch starts outputting the on-signal. The prohibiting section is configured to prohibit the neutral control from being subsequently started again, after the neutral control has been started by the neutral control section, regardless of the brake fluid pressure detected by the brake fluid pressure detecting section until the brake switch outputs the off-signal. | 01-22-2009 |
| 20090011888 | AUTOMATIC TRANSMISSION HYDRAULIC PRESSURE CONTROL APPARATUS - An automatic transmission hydraulic pressure control apparatus decreases a hydraulic pressure lower limit value as much as possible without causing a non-operating zone of a solenoid valve to be included in a control region of the solenoid valve due to product variation. First and second determinations are alternately performed to determine if a solenoid command value is in a non-operating zone by alternately changing the solenoid command value to decrease and increase the actual hydraulic pressure in a step-like manner. The solenoid command value of an immediately previous cycle in which the first determining section determined that the solenoid command value was not in the non-operating zone is set as a solenoid command limit value when one of the first and second determining sections has determined that the solenoid command value is in the non-operating zone. | 01-08-2009 |
| 20080312036 | AUTOMATIC TRANSMISSION CONTROL APPARATUS - An automatic transmission control apparatus includes an engine rotational speed limit verifying section and a shift control characteristic changing section. The engine rotational speed limit verifying section is configured to receive an engine rotational speed limit value for limiting an engine rotational speed and determine if the engine rotational speed limit value is lower than a prescribed normal upper limit value. The shift control characteristic changing section is configured to change a shift schedule of an automatic transmission based on the engine rotational speed being limited by the engine rotational speed limit value and the automatic transmission having a stronger tendency to select a higher gear stage than if the engine rotational speed limit value was not being limited to a lower value than the prescribed normal limit value, when the engine rotational speed limit value is determined to lower than the prescribed normal upper limit value. | 12-18-2008 |
| 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 |
