Patent application number | Description | Published |
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 |
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 |
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 |
20110015834 | CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREOF - When a vehicle stops in a travel range, a transmission controller sets a subtransmission mechanism in a second speed interlocking condition in which a torque input into a continuously variable transmission is transmitted in a second gear position and both a frictional engagement element of a first gear position and a frictional engagement element of the second gear position are engaged, and when a predetermined condition is established while the vehicle is stationary, the transmission controller reduces an output shaft torque of the continuously variable transmission. | 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 |
20110015836 | SHIFT CONTROL OF CONTINUOUSLY VARIABLE TRANSMISSION - A speed ratio of a continuously variable transmission mechanism | 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 |
20110015838 | SHIFT CONTROL OF CONTINUOUSLY VARIABLE TRANSMISSION - A continuously variable transmission | 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 |
20110015840 | SHIFT CONTROL OF AUTOMATIC TRANSMISSION - A subtransmission mechanism | 01-20-2011 |
20120083977 | CONTINUOUSLY VARIABLE TRANSMISSION AND SHIFT CONTROL METHOD - Continuously variable transmission includes: a variator; a stepwise auxiliary transmission mechanism; and a shift controller configured to set a desired through transmission ratio based on the calculated desired target rotational speed, the shift control section including; a slope road upshift prohibiting section configured to prohibit upshift of the auxiliary transmission mechanism when the vehicle runs on a slope road, and a slope road upshift section configured to upshift the auxiliary transmission mechanism when the vehicle runs in a predetermined running state when the slope road upshift prohibiting section prohibits upshift of the auxiliary transmission mechanism, and to perform the shift of the auxiliary transmission mechanism while the transmission ratio of the variator is varied in accordance with the variation of the transmission ratio of the auxiliary transmission mechanism to prevent varying the through transmission ratio even when the vehicle runs on the slope road. | 04-05-2012 |
20140073469 | 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. | 03-13-2014 |
20140342876 | CONTINUOUSLY VARIABLE TRANSMISSION AND METHOD OF CONTROLLING THE SAME - A transmission controller executes synchronization shift of shifting a variator in a direction opposite to a speed ratio change direction of a sub transmission mechanism when shifting a sub transmission mechanism. When a gear position of the sub transmission mechanism is at the second gear position and an output increase request of a power source is made, the transmission controller prohibits the synchronization shift and shifts only the sub transmission mechanism from a second gear position to a first gear position. | 11-20-2014 |