Title:
【発明の名称】自動変速機のロックアップ制御装置
Document Type and Number:
Japanese Patent JP2571621
Kind Code:
B2
Abstract:
A lock-up control in a motor vehicle includes a lock-up control solenoid for engaging a lock-up clutch in a torque converter. A hydraulic fluid temperature of hydraulic fluid used in the torque converter and also in the associated automatic transmission is detected. When the fluid temperature becomes higher than a predetermined temperature value, for example 120 DEG C. in the embodiment, a different lock-up shift point mapping is set which defines a lock-up range stretching beyond a predetermined gear position to include a gear position lower than the predetermined gear position. Thus, the lock-up range where the lock-up clutch should be engaged stretches, rendering the torque converter to stop stirring the hydraulic fluid therein when the fluid temperature is higher than the predetermined temperature value, effectively preventing further rise in the fluid temperature.
Inventors:
SHIBAYAMA NAOSHI
Application Number:
JP8243089A
Publication Date:
January 16, 1997
Filing Date:
March 31, 1989
Export Citation:
Assignee:
NISSAN MOTOR
International Classes:
F16H61/14; F16H59/72; (IPC1-7): F16H61/14
Domestic Patent References:
| JP61248959A | ||||
| JP62137467A | ||||
| JP583144B2 |
Attorney, Agent or Firm:
Fujiya Shiga (2 outside)