Vehicle and method for controlling the same
AssigneesJATCO Ltd, Nissan Motor Co., Ltd.
InventorsHiroki Iwasa, Hironori Miyaishi, Tetsuya Izumi
Life of this patent
Estimating the term…
Abstract
A hydraulic pressure controller includes belt sandwiching force increasing means. The belt sandwiching force increasing means increases a belt sandwiching force by a primary pulley and a secondary pulley on the basis of a braking force request from a driver, up to a predetermined value to prevent a belt from slipping due to a braking force. The belt sandwiching force increasing means increases the belt sandwiching force in a range of less than the predetermined value before the braking force request occurs.
Claims9
A vehicle comprising:
- a variator disposed between a driving source and a driving wheel, the variator including a belt wound around between a primary pulley and a secondary pulley;
- and
- a hydraulic pressure controller configured to
- change hydraulic pressures supplied to the primary pulley and the secondary pulley to control a belt sandwiching force,
- increase the belt sandwiching force by the primary pulley and the secondary pulley on a basis of a braking force request from a driver up to a predetermined value, to prevent the belt from slipping due to a braking force, and
- gradually increase the belt sandwiching force before the braking force request occurs, up to a value larger than a belt sandwiching force necessary to prevent the belt from slipping before the braking force request occurs and in a range of less than the predetermined value at a predetermined increase rate.
A method for controlling a vehicle including a variator disposed between a driving source and a driving wheel, and a hydraulic pressure controller, the variator including a belt wound around between a primary pulley and a secondary pulley, the hydraulic pressure controller being configured to change hydraulic pressures supplied to the primary pulley and the secondary pulley to control a belt sandwiching force, the method comprising:
- upon increasing the belt sandwiching force by the primary pulley and the secondary pulley on a basis of a braking force request from a driver up to a predetermined value to prevent the belt from slipping due to a braking force, gradually increasing the belt sandwiching force before the braking force request occurs, up to a value larger than a belt sandwiching force necessary to prevent the belt from slipping before the braking force request occurs and in a range of less than the predetermined value at a predetermined increase rate.
A vehicle comprising:
- a variator disposed between a driving source and a driving wheel, the variator including a belt wound around between a primary pulley and a secondary pulley;
- and
- control means for controlling a belt sandwiching force through changing hydraulic pressures supplied to the primary pulley and the secondary pulley, wherein
- the control means
- increases the belt sandwiching force by the primary pulley and the secondary pulley on a basis of a braking force request from a driver up to a predetermined value, to prevent the belt from slipping due to a braking force, and
- increases the belt sandwiching force in a gradual manner before the braking force request occurs, up to a value larger than a belt sandwiching force necessary to prevent the belt from slipping before the braking force request occurs and in a range of less than the predetermined value at a predetermined increase rate.
Dependencies are inferred from the claim text.