F16H2061/6605

Control device and control method for continuously variable transmission

A speed change ECU for a CVT sets a target input rotational speed (Nin*) such that the speed ratio of the CVT is varied stepwise a plurality of times consecutively to the downshift side in response to an operation to depress a brake pedal by a driver, and sets the target input rotational speed (Nin*) such that the time interval between consecutive downshifts becomes longer as the number of times of execution of downshifts is increased on the basis of intershifting times (tint(1)), (tint(2)), . . . while downshifts in which the speed ratio is varied stepwise are executed consecutively.

CONTROL APPARATUS FOR VEHICLE DRIVE-FORCE TRANSMITTING APPARATUS
20190241172 · 2019-08-08 · ·

A control apparatus for a vehicle drive-force transmitting apparatus that defines first and second drive-force transmitting paths between input and output rotary members. The second drive-force transmitting path is established by engagement of a second engagement device. The control apparatus includes an operation-state determining portion configured to determine which one of a plurality of states is established as an operation state of the second engagement device, by determining whether a plurality of transition-completion conditions, each of which is required to determine that a transition of the operation state of the second engagement device to a corresponding one of the plurality of states from another of the plurality of states has been completed, are satisfied or not, based on () a state of a hydraulic control executed to control a hydraulic pressure supplied to the second engagement device and () a rotational speed difference of the second engagement device.

GEAR SHIFT CONTROL DEVICE FOR VEHICLE TRANSMISSION AND GEAR SHIFT CONTROL METHOD FOR VEHICLE TRANSMISSION
20190024791 · 2019-01-24 · ·

In gear-shift control apparatus and method for a vehicular transmission, a variator which is interposed between an engine and driving wheels and which is capable of modifying a gear (speed) ratio continuously; a sub transmission which is installed in series with the variator and which is capable of switching a plurality of gear-shift stages through a replacement of engagement elements; and a transmission controller which performs a gear ratio control for the variator and a gear-shift stage control for the sub transmission are installed. During a deceleration through a second speed stage of the sub transmission, when the variator is a state in which the variator is at a lowest gear (speed) ratio, a down-shift in which the sub transmission is forced to perform the gear-shift from a second speed stage to a first speed stage, with the variator maintained at the lowest gear (speed) ratio.

CONTINUOUSLY VARIABLE TRANSMISSION PUMP LIMITED STOP CONTROLS
20190003588 · 2019-01-03 ·

A continuously variable transmission pump limited stop controls system includes a continuously variable transmission (CVT) including primary and secondary variator pulleys. The primary and the secondary variator pulley each have a mating half with a conical face, defining a variable-width gap between each pulley and its mating half. A flexible member is positioned within the gap and is movable on the conical faces defining a CVT ratio. A secondary pulley valve controls flow of a fluid to the secondary variator pulley. A secondary pulley pressure boost system identifies if a rapid stop event is occurring and issues a command to fully open the secondary pulley valve during the rapid stop event. As the CVT ratio reaches a predetermined threshold of a desired relaunch ratio during the rapid stop event, an engine speed request is issued to an engine connected to the CVT to increase engine speed.

Hydraulic control device of belt-type continuously variable transmission

In a hydraulic control device of a belt-type continuously variable transmission that includes: a first hydraulic actuator that is provided in a primary pulley and reduces a width of a belt groove when hydraulic pressure is applied thereto; and a first control valve that regulates predetermined source pressure to be gear-change hydraulic pressure for setting or changing a gear change ratio and outputs the gear-change hydraulic pressure to the first hydraulic actuator, gear change equipment is included that regulates the source pressure to be the gear-change hydraulic pressure so as to regulate the hydraulic pressure of the first hydraulic actuator when the hydraulic pressure of the first hydraulic actuator is rapidly changed to change the width of the belt groove.

CONTROL DEVICE AND CONTROL METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION

A speed change ECU for a CVT sets a target input rotational speed (Nin*) such that the speed ratio of the CVT is varied stepwise a plurality of times consecutively to the downshift side in response to an operation to depress a brake pedal by a driver, and sets the target input rotational speed (Nin*) such that the time interval between consecutive downshifts becomes longer as the number of times of execution of downshifts is increased on the basis of intershifting times (tint(1)), (tint(2)), . . . while downshifts in which the speed ratio is varied stepwise are executed consecutively.

Control device for vehicular continuously variable transmission

A control device of a continuously variable transmission for a vehicle to which power of a drive force source is input through a transmission path connecting/disconnecting device changes a gear ratio of the continuously variable transmission to a lower vehicle speed side during vehicle deceleration when the transmission path connecting/disconnecting device is in a power transmission interrupted state of interrupting power transmission through a power transmission path between the drive force source and the continuously variable transmission, earlier as compared to when the transmission path connecting/disconnecting device is in a power transmittable state enabling the power transmission, and the control device changes a gear ratio of the continuously variable transmission earlier to the lower vehicle speed side when vehicle deceleration is larger, when the transmission path connecting/disconnecting device is in the power transmission interrupted state.

AUTOMATIC REGENERATIVE BRAKING SYSTEM TO INCREASE ENERGY EFFICIENCY
20250353378 · 2025-11-20 ·

A regenerative braking system includes an electric machine coupled to a wheel of the vehicle. The system includes a distance sensor configured to provide distance information (e.g., a stop location), a torque sensor configured to provide torque information between the electric machine and the wheel, and a speed sensor configured to provide speed information indicative of a speed of the electric machine or a speed of the vehicle. A controller includes a processor and a memory storing instructions executable by the processor to: send a query to a stored map that includes energy efficiency information corresponding to the vehicle, the query including the distance and speed information; output a desired braking torque from the map based on the query and a maximum possible energy efficiency value of the stored map; and control operation of the electric machine based on the torque information and the desired braking torque.