Abstract: An apparatus for controlling the amount of slip of a lock-up clutch between pump and turbine impeller of a torque converter or other fluid-filled power transmitting device in a motor vehicle, the lock-up clutch including a piston which is operated by a pressure difference between pressures in two oil chambers on the opposite sides of the piston, and the apparatus including a slip control device for controlling the lock-up clutch according to a slip control output such that the actual slip of the lock-up clutch coincides with a target slip speed, and an output oscillating device for oscillating the slip control output to oscillate the pressure difference without vibrating the piston.

Abstract: An apparatus for controlling the amount of slip of a lock-up clutch connecting an input and an output rotary member of a fluid-filled power transmitting device of a motor vehicle, such that the actual slip speed of the lock-up clutch coincides with a target value, the apparatus including (a) a slip control device for providing a slip control output for controlling the clutch according to a slip control equation which includes at least an integral action term, and on the basis of a feedback control value for zeroing a control error between the actual and target slip speeds, and a learning control value which is updated depending upon the vehicle running condition, and (b) an output change restricting device for adjusting the feedback control value such that an amount of change of the slip control output provided by the slip control device is smaller than an amount of change of the learning control value.

Abstract: A slip control apparatus for a lock-up clutch disposed between pump and turbine impellers of a torque converter of a motor vehicle equipped with a traction control device for controlling a throttle valve of an engine so as to prevent excessive slipping of vehicle drive wheels, the apparatus including (a) a slip control device for controlling the amount of slip of the lock-up clutch such that an actual slip speed of the clutch coincides with a predetermined target value while the vehicle running condition is in a predetermined slip control area partially defined by the throttle valve opening, (b) a traction control monitoring device for detecting an operation of the traction control device, and (c) a clutch torque holding device for maintaining a present torque transmitting state of the clutch during operation of traction control device, by inhibiting a slip control operation of the slip control device or by maintaining the target slip speed of the clutch at the presently effective value.

Abstract: Heat-resistant bonding materials are composed of a polyimide precursor end-capped at molecule ends thereof and/or an imide compound formed from the polyimide precursor. They may also contain fine particles of at least one material selected from metals, metal oxides, metal carbides and metal nitrides.