Abstract: A device for controlling a power transmission device for a vehicle, which, at the time of gearshift, so controls the engine as to rotate at a target rotational speed, wherein at the time of shifting the gear up, a target value properly corresponding to an actual vehicle speed is set to quickly increase the engine output and to shorten the time for shifting the gear. In controlling the engine at the time of shifting the gear up, a target engine rotational speed is set based the signals from, wheel rotational speed detector means that detects the rotational speed of a wheel, such as an anti-lock control device. Thus, the target engine rotational speed is set depending properly upon an actual vehicle speed that varies accompanying an increase in the amount of engaging the clutch at the time of gearshift, and the gear at the time of accelerating the vehicle can be quickly shifted up without accompanied by the shift shock.

Abstract: A power transmission device for a vehicle having a clutch 3 between an engine 1 and a transmission 4, preventing variation in the engine torque and shift shock when the engine control mode returns from an engine control at the time of shifting back to an accelerator pedal follow-up control for normal traveling. Timer means 62 is provided for a clutch control device 6 that executes the control for disengaging the clutch 3 at the time of shifting and engaging it after the completion of the shifting. The timer means 62 controls a moment for starting the clutch engagement control depending on the engine conditions, etc. The state of increasing the amount of clutch engagement varies and the state of engine rotational speed varies, too. When the engine control at the time of shifting is returned back to the accelerator pedal follow-up control at the time of normal traveling, therefore, the engine can be placed in a condition where the engine torque does not vary despite the control mode is changed over.

Abstract: A device for controlling a power transmission device for a vehicle, which, at the time of gearshift, so controls the engine as to rotate at a target rotational speed, wherein at the time of shifting the gear up, a target value properly corresponding to an actual vehicle speed is set to quickly increase the engine output and to shorten the time for shifting the gear. In controlling the engine at the time of shifting the gear up, a target engine rotational speed is set based the signals from, wheel rotational speed detector means that detects the rotational speed of a wheel, such as an anti-lock control device. Thus, the target engine rotational speed is set depending properly upon an actual vehicle speed that varies accompanying an increase in the amount of engaging the clutch at the time of gearshift, and the gear at the time of accelerating the vehicle can be quickly shifted up without accompanied by the shift shock.

Abstract: A power transmission device for a vehicle equipped with a wet multiple disk clutch for disconnecting the power at the time of gearshift by using a clutch controller, wherein the amount of engagement where the clutch is half-engaged is learned maintaining precision. In the present invention, the clutch controller of the wet multiple disk clutch moves a clutch piston over the whole stroke thereof by using the working fluid for varying the amount of engagement at the start of learning the amount of engagement at a point where the clutch starts half-engaging and, immediately thereafter, the amount the clutch is half-engaged is detected. Upon moving the clutch piston, the working fluid present among the friction disks of the wet multiple disk clutch is drained and is replaced by the new working fluid avoiding detection error caused by the fluctuation in the temperature of the working fluid and eliminating unstable operation of the clutch piston caused by static friction of a large resistance.

Abstract: In a vehicle mounting an engine equipped with an exhaust turbocharger and a fluid transmission device as the power transmission device, occurrence of surging in the exhaust turbocharger is prevented at the time of connecting a lockup clutch in the fluid transmission device. When a condition for connecting the lockup clutch is held to lock up the fluid transmission device coupled to the engine 1 equipped with the exhaust turbocharger, the operation is executed by lowering a target engine rotational speed for a predetermined period of time prior to the locking up to avoid the occurrence of surging caused by a decrease in the engine rotational speed due to the lockup. A lockup clutch control device 50 includes first timer means 51 for setting a time for executing the operation by decreasing the target engine rotational speed, and second timer means 52 for setting a time for waiting for the start of lockup.

Abstract: A power transmission device for a vehicle having a clutch 3 between an engine 1 and a transmission 4, preventing variation in the engine torque and shift shock when the engine control mode returns from an engine control at the time of shifting back to an accelerator pedal follow-up control for normal traveling. Timer means 62 is provided for a clutch control device 6 that executes the control for disengaging the clutch 3 at the time of shifting and engaging it after the completion of the shifting. The timer means 62 controls a moment for starting the clutch engagement control depending on the engine conditions, etc. The state of increasing the amount of clutch engagement varies and the state of engine rotational speed varies, too. When the engine control at the time of shifting is returned back to the accelerator pedal follow-up control at the time of normal traveling, therefore, the engine can be placed in a condition where the engine torque does not vary despite the control mode is changed over.

Abstract: A vehicle power transmission device in which an engine 61 equipped with a turbo charger 62 and a fluid coupling 2 with a lockup clutch are combined together, wherein a timing for connecting the lockup clutch 25 is normalized to accomplish a smooth connecting during the low-speed traveling after the start. A lockup clutch control device is equipped with means for detecting the operating condition of the turbo charger 62, and the lockup clutch 25 starts to be connected at a moment before the turbo charger 62 reaches a high output state. The lockup clutch 25 is connected within a short period of time without producing a shock due to connection and the vehicle, thereafter, accelerates smoothly. A rate of change in the revolution of the engine 61 or the pressure in the intake pipe 63 is detected to detect the operating condition of the turbo charger 62.

Abstract: A torque converter comprises a pump having a pump shell and impellers; a turbine having a turbine shell and runners; a stator arranged between the pump and the turbine and is supported by the housing; and an operation fluid filled in the pump and in the turbine. Transmission torque limit means is arranged between the stator and the housing to so limit the transmission of torque transmitted to the stator as will not to increase in excess of a predetermined value.

Abstract: A fluid coupling comprising a pump having an annular pump shell with an annular core ring mounted on a pump hub and a plurality of impellers radially arranged in the pump shell; a turbine arranged being opposed to the pump and having an annular turbine shell with an annular core ring mounted on a turbine hub capable of rotating relative to the pump hub and a plurality of runners radially arranged in the turbine shell; and an operation fluid filled in the pump and in the turbine; wherein, the turbine is so constituted as to slide on the turbine hub in the axial direction thereof, and has resilient urging means for urging the turbine in a direction to separate away from the pump side; and the core ring of the pump and the core ring of the turbine are so constituted that the gaps for flowing the operation fluid into the two core rings are increased in a state where the turbine is close to the pump and that the gaps for flowing the operation fluid into the two core rings are decreased as the turbine separates awa

Abstract: A vehicle power transmission device in which an engine 61 equipped with a turbo charger 62 and a fluid coupling 2 with a lockup clutch are combined together, wherein a timing for connecting the lockup clutch 25 is normalized to accomplish a smooth connecting during the low-speed traveling after the start. A lockup clutch control device is equipped with means for detecting the operating condition of the turbo charger 62, and the lockup clutch 25 starts to be connected at a moment before the turbo charger 62 reaches a high output state. The lockup clutch 25 is connected within a short period of time without producing a shock due to connection and the vehicle, thereafter, accelerates smoothly. A rate of change in the revolution of the engine 61 or the pressure in the intake pipe 63 is detected to detect the operating condition of the turbo charger 62.

Abstract: A shift actuator for a transmission for turning, in a direction of shift, a shift lever support mechanism mounting the shift lever of the transmission, wherein it comprises an operation lever coupled, at its intermediate portion, to said shift lever support mechanism, the first electromagnetic solenoid and the second electromagnetic solenoid which are each coupled to both ends of said operation lever so as to operate in the upward and downward directions; and an operation rod of said first electromagnetic solenoid is coupled to one end of said operation lever and an operation rod of said second electromagnetic solenoid is coupled to the other end of said operation lever.

Abstract: A torque converter comprises a pump having a pump shell and impellers; a turbine having a turbine shell and runners; a stator arranged between the pump and the turbine and is supported by the housing; and an operation fluid filled in the pump and in the turbine. Transmission torque limit means is arranged between the stator and the housing to so limit the transmission of torque transmitted to the stator as will not to increase in excess of a predetermined value.

Abstract: A fluid coupling comprising a pump having an annular pump shell with an annular core ring mounted on a pump hub and a plurality of impellers radially arranged in the pump shell; a turbine arranged being opposed to the pump and having an annular turbine shell with an annular core ring mounted on a turbine hub capable of rotating relative to the pump hub and a plurality of runners radially arranged in the turbine shell; and an operation fluid filled in the pump and in the turbine; wherein, the turbine is so constituted as to slide on the turbine hub in the axial direction thereof, and has resilient urging means for urging the turbine in a direction to separate away from the pump side; and the core ring of the pump and the core ring of the turbine are so constituted that the gaps for flowing the operation fluid into the two core rings are increased in a state where the turbine is close to the pump and that the gaps for flowing the operation fluid into the two core rings are decreased as the turbine separates awa

Abstract: A fluid coupling comprising a pump having an annular pump shell with an annular core ring mounted on a pump hub and a plurality of impellers radially arranged in the pump shell, and a turbine arranged facing the pump and having an annular turbine shell with an annular core ring mounted on a turbine hub that can rotate relative to the pump hub and a plurality of runners radially arranged in the turbine shell, wherein the turbine shell is so constituted to slide on the turbine hub in the axial direction, and provision is made of a centrifugal pushing means for pushing the turbine toward the pump by the action of the centrifugal force produced by the rotation of the turbine.

Abstract: A fluid coupling comprising a pump having an annular pump shell with an annular core ring mounted on a pump hub and a plurality of impellers radially arranged in the pump shell, and a turbine arranged facing the pump and having an annular turbine shell with an annular core ring mounted on a turbine hub that can rotate relative to the pump hub and a plurality of runners radially arranged in the turbine shell, wherein the turbine shell is so constituted to slide on the turbine hub in the axial direction, and provision is made of a resilient urging means for pushing the turbine toward the side of the pump.

Abstract: A fluid coupling comprising a pump having a pump shell and a plurality of impellers arranged in the pump shell, a turbine having a turbine shell arranged to be opposed to the pump and a plurality of runners arranged in the turbine shell, and a baffle mechanism arranged in a fluid circulation passage formed by the pump shell and the turbine shell, wherein the baffle mechanism comprises a first baffle plate having a plurality of first openings, a second baffle plate that has a plurality of second openings and is disposed in such a manner as to overlap with the first baffle plate and as to be allowed to rotate relative thereto, and a centrifugal operation means for turning the second baffle plate relative to the first baffle plate in response to the rotational speed of the first baffle plate.

Abstract: A fluid coupling comprising: a pump having a pump shell and a plurality of impellers arranged in the pump shell; and a turbine disposed opposite said pump and having a turbine shell and a plurality of runners arranged in said turbine shell; wherein provision is made of a baffle mechanism which retractably protrudes into a fluid circulatory passage formed by the pump shell and the turbine shell, the baffle mechanism greatly protruding into the fluid circulatory passage in a state where the rotational speed is low and protruding little into the fluid circulatory passage in a state where the rotational speed is high.

Abstract: A shift actuator for transmission, for turning, in a direction of shift, a shift lever support mechanism mounting the shift lever of the transmission. An operation lever is coupled, at an intermediate portion thereof, to the shift lever support mechanism. A first electromagnetic solenoid and a second electromagnetic solenoid are coupled to the two ends of the operation level so as to operate in upward and downward directions. The operation rod of the first electromagnetic solenoid is coupled to one end of the operation lever, and the operation rod of the second electromagnetic solenoid is coupled to the other end of the operation lever.

Abstract: A shift actuator for a transmission for turning, in a direction of shift, a shift lever support mechanism mounting the shift lever of the transmission, wherein it comprises an operation lever coupled, at its intermediate portion, to said shift lever support mechanism, the first electromagnetic solenoid and the second electromagnetic solenoid which are each coupled to both ends of said operation lever so as to operate in the upward and downward directions; and an operation rod of said first electromagnetic solenoid is coupled to one end of said operation lever and an operation rod of said second electromagnetic solenoid is coupled to the other end of said operation lever.

Abstract: A fluid coupling comprising a pump having an annular pump shell with an annular core ring mounted on a pump hub and a plurality of impellers radially arranged in the pump shell, and a turbine arranged facing the pump and having an annular turbine shell with an annular core ring mounted on a turbine hub that can rotate relative to the pump hub and a plurality of runners radially arranged in the turbine shell, wherein the turbine shell is so constituted to slide on the turbine hub in the axial direction, and provision is made of a centrifugal pushing means for pushing the turbine toward the pump by the action of the centrifugal force produced by the rotation of the turbine.