Abstract: A driving assistance device includes processing circuitry configured to acquire environmental information on an environment around a mobile object, acquire action information on an action of a driver of the mobile object, obtain control information for performing automated driving control of the mobile object on a basis of the acquired environmental information and a machine learning model, determine contribution information having a high degree of contribution to the control information, calculate cognitive information indicating a cognitive region of the driver in the environment around the mobile object, specify unrecognized contribution information estimated not to be recognized by the driver, and output driving assistance information necessary for driving assistance on a basis of the unrecognized contribution information.

Abstract: A control system for a vehicle has a continuously variable automatic transmission, an automatic transmission control system for controlling the automatic transmission, and a cruise control system for controlling speed of the vehicle to a desired cruising speed. The cruise control system has a vehicle speed sensor, and a desired cruising speed providing section responsive to an output signal of the vehicle speed sensor for providing the desired cruising speed. The vehicle speed sensor is used for both the automatic transmission control system and the cruise control system.

Abstract: A control system for a motor vehicle has a continuously variable transmission, a transmission ratio control system for controlling the transmission ratio, and a cruise control system for controlling speed of the vehicle to a desired cruising speed. A resume switch is provided for producing an acceleration signal during cruising of the vehicle. In response to the acceleration signal, a throttle valve of the engine is opened, and the transmission ratio is downshifted by a predetermined value.

Abstract: A control system for a continuously variable transmission has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. The transmission ratio control valve has chamber at both ends of the spool. By controlling the flow rate of oil supplied to the chambers in accordance with a desired transmission ratio, the spool is shifted, so that the rate of change of the transmission ratio is controlled. The transmission ratio changing rate is corrected by the rate of change of the desired transmission ratio. Two coefficients representative of the degree of throttle opening and a physical condition such as viscosity are also generated to correct the transmission ratio changing rate.

Abstract: A control system for a continuously variable transmission for a motor vehicle has a transmission ratio control valve for controlling the transmission ratio. The transmission ratio is controlled in accordance with a transmission ratio changing speed. The transmission ratio changing speed is corrected with a coefficient which is determined in accordance with desired transmission ratio changing speed and the difference between desired transmission ratio and actual transmission ratio.

Abstract: A control system for a continuously variable transmission for a motor vehicle has a transmission ratio control valve for controlling the transmission ratio. The transmission ratio is controlled in accordance with a transmission ratio changing rate. At acceleration during low vehicle speed driving, the transmission ratio changing rate is set to a large value so as to quickly increase the transmission ratio.

Abstract: A system for controlling a friction clutch of a motor vehicle having a continuously variable transmission. The system has an actuator for shifting a clutch plate of the clutch. Vehicle start intention is detected in accordance with a first depression of an accelerator pedal. In response to the vehicle start intention, the actuator operates to shift the clutch plate to a partial engagement position at a maximum speed. The clutch plate is kept at the position and then the clutch plate is shifted from the partial engagement position to an entire engagement position, when the transmission is upshifted.

Abstract: A control system for a motor vehicle has a continuously variable transmission, a transmission ratio control system for controlling the transmission ratio, and a cruise control system for controlling speed of the vehicle to a desired cruising speed. A coasting switch is provided for producting a coasting signal during cruising of the vehicle. In response to the coasting signal, a throttle valve of the engine is closed, and the transmission ratio is downshifted by a predetermined value.

Abstract: A control system for a continuously variable transmission for a motor vehicle has a line pressure control valve and a transmission ratio control valve, each having a spool for controlling oil supplied to a cylinder of a pulley. The transmission ratio control valve has chambers at both ends of the spool. The flow rate of oil supplied to the chambers is controlled by an on-off valve at duty ratio in accordance with a desired transmission ratio so that the spool is shifted, so that the transmission ratio changing speed is controlled. The duty ratio is corrected by line pressure, so that the transmission ratio is controlled in accordance with the line pressure.

Abstract: A control system for a motor vehicle has a continuously variable transmission, a transmission ratio control system for controlling the transmission ratio, and a cruise control system for controlling speed of the vehicle to a desired cruising speed. The transmission ratio is controlled to a desired transmission ratio in accordance with load on the engine. The desired transmission ratio is further determined in accordance with the desired cruising speed.

Abstract: A continuously variable belt drive transmission has a torque converter with a lockup clutch. Transmission ratio of the transmission starts to change in accordance with driving conditions of a vehicle, and the lockup clutch is engaged in accordance with driving conditions of the vehicle. A start signal for starting of the changing of the transmission ratio is produced in accordance with driving conditions, and a lockup signal for engaging of the lockup clutch is produced in accordance with driving conditions. In response to the start signal and to the lockup signal the change of the transmission ratio and engaging of the lockup clutch are performed at the same time.

Abstract: A control system for a continuously variable transmission for a motor vehicle has a transmission ratio control value for controlling the transmission ratio. The transmission ratio is controlled in accordance with a desired transmission ratio. During use of an air conditioner of the vehicle, the desired transmission ratio increases, so that necessary engine power can be obtained. The desired transmission ratio is increased by a larger value in a small transmission ratio range than a large transmission ratio range.

Abstract: A continuously variable belt drive transmission has a torque converter with a lockup clutch. The transmission ratio of the transmission starts to change in accordance with driving conditions of a vehicle, and the lockup clutch is engaged in accordance with driving conditions of the vehicle. A start signal for starting of the changing of the transmission ratio is produced in accordance with driving conditions, and a lockup signal for engaging of the lockup clutch is produced in accordance with driving conditions. In response to the start signal and to the lockup signal the change of the transmission ratio and engaging of the lockup clutch are performed with a time delay.

Abstract: A control system has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. The transmission ratio control valve has chambers at both ends of the spool. The amount of oil supplied to the chambers is controlled by a control signal which is determined by a desired transmission ratio and the actual transmission ratio, so that the transmission ratio is controlled.

Abstract: A control system for a continuously variable transmission has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. The tansmission ratio control valve has chambers at both ends of the spool. By controlling flow rate of oil supplied to the chambers with a control signal in accordance with a desired transmission ratio, the spool is shifted, so that the transmission ratio is controlled to a desired transmission ratio. When the actual transmission ratio does not coincide with the desired ratio in a steady state of an engine, the control signal is corrected so as to reduce the difference between the desired transmission ratio and the actual ratio.

Abstract: A control system for an infinitely variable transmission has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. The deceleration rate of the motor vehicle contianing the system is detected to produce a deceleration signal. By controlling the oil pressure supplied to the transmission ratio control valve in accordance with engine operating conditions and the deceleration signal, the spool is shifted such that downshifting speed is increased with increasing deceleration.

Abstract: A control system has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. The transmission ratio control valve has chambers at both ends of the spool. By controlling the amount of oil supplied to the chambers in accordance with the difference between desired transmission ratio and actual transmission ratio, the spool is shifted, so that the transmission ratio changing speed is controlled. The desired transmission ratio is determined by a desired speed of input of the transmission.

Abstract: A control system for an infinitely variable transmission has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. The transmission ratio control valve has chambers at both ends of the spool. By controlling the pressure of oil supplied to the chambers in accordance with engine operating conditions, the spool is shifted, so that the speed of changing the transmission ratio is controlled.

Abstract: A control system has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. By controlling the pressure of oil supplied to one end of the spool of the transmission ratio control valve in accordance with conditions of the engine and transmission, the spool is shifted, so that the rate of change of the transmission ratio is controlled. Actual rate of change of the transmission ratio is compared with a desired rate of change to produce an error signal. In response to the error signal, the actual rate of change is converged to the desired rate of change.

Abstract: A control system for an infinitely variable transmission has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. Acceleration of depression of an accelerator pedal is detected to produce an acceleration signal. By controlling the pressure of oil supplied to the transmission ratio control valve in accordance with engine operating conditions and the acceleration signal, the spool is shifted, so that the speed of changing the transmission ratio is controlled.