초록 ▼

A slip control system of a lock-up clutch of an automatic transmission comprising a torque converter, lock-up clutch, slip control device for controlling an engaging force of the lock-up clutch to establish a slip control in which a predetermined rotation speed difference is allowed between the inpu

A slip control system of a lock-up clutch of an automatic transmission comprising a torque converter, lock-up clutch, slip control device for controlling an engaging force of the lock-up clutch to establish a slip control in which a predetermined rotation speed difference is allowed between the input member and output member when a vehicle operating condition is in a predetermined slip control zone, transient control device for carrying out a transient control by setting a transient control factor to increase a change in the engaging force of the lock-up clutch for a transient condition when the vehicle operating condition is transferred from a non-slip control zone to the slip control zone, and the transient control factor being determined in accordance with a vehicle operating condition just before the vehicle operating condition falls into the slip control zone. The slip control system reduces a torque shock in a change between the non-slip control condition and the slip control condition and at the same time accomplishes a responsive slip control.

대표청구항 ▼

A slip control system of a lock-up clutch of an automatic transmission comprising a torque converter disposed between the engine and the automatic transmission for controlling an amount of a torque transmitted from the engine to the transmission, lock-up clutch means provided in the torque converter

A slip control system of a lock-up clutch of an automatic transmission comprising a torque converter disposed between the engine and the automatic transmission for controlling an amount of a torque transmitted from the engine to the transmission, lock-up clutch means provided in the torque converter for connecting input and output members of the torque converter directly, slip control means for controlling an engaging force of the lock-up clutch means to establish a slip control in which a slippage is allowed between the input member and output member when a vehicle operating condition is in a predetermined slip control zone, transient control means for carrying out a transient control by setting a transient control factor to increase a change in the engaging force of the lock-up clutch means during a transient condition when the vehicle operating condition is changed between a non-slip control zone wherein the lock-up clutch is fully engaged or fully disengaged and said slip control zone, and the transient control factor being determined in accordance with the vehicle operating condition just before the vehicle operating condition falls into said slip control zone.