Control device for vehicle and control method for vehicle
AssigneesJATCO Ltd, Nissan Motor Co., Ltd.
InventorsJonghwan Lee, Tomohiro Utagawa, Chadol Kim
Life of this patent
Estimating the term…
Abstract
A controller includes a control unit which is configured to execute a coast stop control. The coast stop control is configured to perform automatic stopping of the drive source while the vehicle is traveling, when a permitting condition is satisfied, the permitting condition including a condition that a speed ratio R of the variator is lower than a first threshold R1 while the lock-up clutch is in an engaged phase. The control unit is configured to prohibit execution of the coast stop control in a case in which an input-output rotation speed difference of the torque converter is equal to or more than a predetermined value when the lock-up clutch is in the engaged phase.
Claims6
A control device for a vehicle configured to control a vehicle provided with:
- a drive source;
- and
- an automatic transmission having a torque converter disposed downstream of the drive source, the torque converter having a lock-up clutch, and a variator disposed downstream of the torque converter,
- the control device comprising
- a control unit configured to execute a coast stop control, the coast stop control configured to perform automatic stopping of the drive source while the vehicle is traveling, when a permitting condition is satisfied, the permitting condition including a condition that a speed ratio of the variator is larger than a first threshold while the lock-up clutch is in an engaged phase, wherein
- the control unit is configured to prohibit execution of the coast stop control in a case in which an input-output rotation speed difference of the torque converter is equal to or more than a predetermined value when the lock-up clutch is in the engaged phase.
A control method for a vehicle for controlling a vehicle provided with:
- a drive source;
- and
- an automatic transmission having a torque converter disposed downstream of the drive source, the torque converter having a lock-up clutch, and a variator disposed downstream of the torque converter,
- the method comprising:
- executing a coast stop control configured to perform automatic stopping of the drive source while the vehicle is traveling, when a permitting condition is satisfied, the permitting condition including a condition that a speed ratio of the variator is larger than a first threshold while the lock-up clutch is in an engaged phase;
- and
- prohibiting execution of the coast stop control in a case in which an input-output rotation speed difference of the torque converter is equal to or more than a predetermined value when the lock-up clutch is in the engaged phase.
A control device for a vehicle configured to control a vehicle provided with:
- a drive source;
- and
- an automatic transmission having a torque converter disposed downstream of the drive source, the torque converter having a lock-up clutch, and a variator disposed downstream of the torque converter,
- the control device comprising
- control means for executing a coast stop control, the coast stop control configured to perform automatic stopping of the drive source while the vehicle is traveling, when a permitting condition is satisfied, the permitting condition including a condition that a speed ratio of the variator is larger than a first threshold while the lock-up clutch is in an engaged phase, wherein
- the control means is configured to prohibit execution of the coast stop control in a case in which an input-output rotation speed difference of the torque converter is equal to or more than a predetermined value when the lock-up clutch is in the engaged phase.
Dependencies are inferred from the claim text.