Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Exedy Corporation

Aisin Seiki Kabushiki Kaisha

Toshiya Yamashita

Masaru Ebata

Yasunori Doman

Takashi Hori

Yoichi Nakashima

Naoki Itazu

Takuya Okada

Ryuji Ibaraki

Yuji Hattori

Michio Yoshida

Yusuke Suzuki

Hiroyuki Shioiri

Akira Murakami

Hiroaki Kimura

Shingo Eto

Hirofumi Ota

Takafumi Inagaki

Makoto Funahashi

Yasunori Nakawaki

Kenta Kimura

Tomoaki Yanagida

Shinichi Ito

Koichi Miyamoto

Toshihiro Aoyama

Atsushi Muto

Takaaki Mamada

Takashi Kuwabara

Masahiro Shirakawa

A hybrid vehicle includes a connecting/disconnecting clutch disposed between an engine and an electric motor, an automatic transmission including an input clutch, a starting clutch disposed between the electric motor and the automatic transmission, and a control apparatus for executing an engine-start control operation for starting the engine, by igniting the engine after increasing a rotational speed of the engine by a torque of the electric motor while placing the connecting/disconnecting clutch into an engaged state. In process of the engine-start control operation that is executed when the hybrid vehicle is in a stopped state with the starting clutch being in a released state, the control apparatus places the input clutch in an engaged state until the rotational speed of the engine exceeds a predetermined speed value, and switches the input clutch to a released state after the rotational speed of the engine has exceeded the predetermined speed value.

Hybrid vehicle

In a torsional vibration reducing device, a protrusion projecting radially outward of the rotating body is formed on an inner wall surface. The protrusion is formed on a rotation direction side of a rotating body relative to a straight line passing through a rotation center of the rotating body and a center of a rolling element when the rolling element is located in a middle between both end positions to which the rolling element swings within the roller chamber, and while the rolling element is located at an end portion of a roller chamber on the rotation direction side of the rotating body, a gap is equal to or less than a predetermined value between the rolling element and a wall surface of the roller chamber on a straight line passing through a rotation center of the rotating body and a tip of the protrusion.

Torsional vibration reducing device

A vehicular fluid power transmitting device includes a pump impeller, a turbine runner, a damper device, a set member, and a centering member. The pump impeller has a pump shell to which torque from a drive source is input. The damper device has a damper input member and a damper output member. The damper input member is connected to an output shaft of the drive source. The damper output member is connected to the pump shell. The set member is fixed to the pump shell, and is connected to the damper output member. Also, the centering member is provided protruding toward the pump shell from the output shaft of the drive source, and is fitted together with the damper input member.

Vehicular fluid power transmitting device

A torque fluctuation absorbing apparatus is capable of securely sealing a space housing an elastic member even on application of a centrifugal force or at the time of cooling. The torque fluctuation absorbing apparatus includes a center plate, a side plate(s) (side plate assembly) coaxial with the center plate and slidably relative to the center plate, and an elastic member housed within a space delimited by the side plate assembly to absorb torque fluctuations between the side plate assembly and the center plate. The apparatus also includes a cover member secured to the center plate and slidably pressure contacted with the side plate assembly to cover from outside a space housing the elastic member, and a suppressing section capable of suppressing the cover member from deforming under a pressure acting on the cover member when atmospheric pressure within the space housing the elastic member(s) becomes lower than outside atmospheric pressure.

Torque fluctuation absorbing apparatus

A vehicular fluid power transmitting device has a pump impeller, a turbine runner, damper device, an annular set member and a bearing assembly. The pump impeller has a pump shell. The damper device is provided between a drive source and the pump shell in an axial direction of an output shaft, and has a damper input member that is connected to the drive source, and a damper output member that is connected to the pump shell. The damper output member is connected to the annular set member that is fixed to the pump shell. The damper input member is relatively rotatably supported via the bearing assembly by the annular set member.

A vehicular fluid power transmitting device includes a pump impeller, a turbine runner, a damper device, and a ring-shaped annular set member. The pump shell has a rear shell and a front shell that is connected to the rear shell. Also, the ring-shaped annular set member connects the damper output member to the front shell and is fixed to the front shell. An intermediate position between a position of an outer radius of the front shell and a position of a radius of the cylindrical shaft is included in a width (W) of the annular set member in a radial direction of the annular set member.

A control device of a power transmission device includes a damper absorbing torsional vibration between a fluid transmission device with a lockup clutch and an engine, the power transmission device is disposed with a connecting/disconnecting device capable of connecting and interrupting power transmission on the downstream side of the fluid transmission device, the control device has a lockup engagement control means engaging the lockup clutch while the power transmission is interrupted by the connecting/disconnecting device in a predetermined engine rotation speed range lower than an idle rotation speed when the engine is started, the lockup engagement control means includes: a resonance due to frequency entrainment determination means determining whether a resonance due to frequency entrainment occurs that blocks an increase in an engine rotation speed NE depending on whether a predefined resonance determination time is exceeded by a required start time of the engine or an elapsed time until the engine rotation speed NE reaches a predetermined rotation speed; a lockup engagement means engaging the lockup clutch while the power transmission is interrupted by the connecting/disconnecting device when the resonance due to frequency entrainment determination means determines that the resonance due to frequency entrainment occurs.

Device for controlling power transmission apparatus

A vehicular torque converter includes: a pump impeller having a pump covering and vanes disposed within an output-side portion of the pump covering; a turbine impeller having vanes opposed to the pump impeller vanes; a stator impeller; a one-way clutch between the stator impeller and a stationary member; and a lock-up clutch configured to connect the turbine impeller to an inner surface of a wall of said pump covering. The vanes are offset with respect to the one-way clutch toward the output side. The vehicular torque converter further includes: a thrust bearing between the stator impeller and the turbine impeller, the thrust bearing having a sliding surface with respect to the stator impeller, the sliding surface being positioned radially outwardly of the one-way clutch and offset from an end face of each of sprags of the one-way clutch toward the output side.

Vehicular torque converter

A vehicle drive device includes: an engine; a fluid power transmission device; a clutch disposed between an input side member and an output side member in the fluid power transmission device; and a torsional vibration reduction device disposed in a power transmission path between the engine and the fluid power transmission device in series with the fluid power transmission device, wherein when the clutch is put into slip engagement, the vehicle drive device has a minimum value set equal to or greater than zero for a differential rotation speed acquired by subtracting a rotation speed of the output side member from a rotation speed of the input side member and has a minimum value set less than zero for a differential rotation speed acquired by subtracting the rotation speed of the output side member from a rotation speed of an input side inertial body in the torsional vibration reduction device.

Vehicle drive apparatus

A torque fluctuation absorber includes a drive plate configured to rotate integrally with a crankshaft of an internal combustion engine, a center plate, a side plate, an elastic member for absorbing torque fluctuations, and a block member configured to be engaged with the drive plate and attached to the side plate, wherein the side plate includes plural accommodation portions accommodating the elastic member, and at least one of a recessed portion and a first window portion which are provided at a position corresponding to a position of the block member, and the block member is attached to a portion of the side plate between adjacent accommodation portions in a circumferential direction of the side plate.

Torque fluctuation absorber

A vehicle driving apparatus includes: a torque converter having a pump vane wheel, a turbine vane wheel, and a stator vane wheel, the stator vane wheel rotatably disposed between the turbine vane wheel and the pump vane wheel; an electric motor that drives the stator vane wheel; afirst connecting and disconnecting means capable of connecting and disconnecting the electric motor and the stator vane wheel to/from each other; and a second connecting and disconnecting means capable of connecting and disconnecting the electric motor and a output shaft to/from each other.

Vehicle driving apparatus

Disclosed is a lock-up clutch operative to uniform temperatures on a multiple number of friction surfaces, thereby improving accuracy of a lock-up control and to prevent shudders of a vehicle from being generated. The lock-up clutch includes a front cover, a lock-up piston, a plurality of torque transmitting plates, and a plurality of friction materials formed on the torque transmitting plates and having three or more friction surfaces. The friction materials are constituted by a first friction material frictionally contactable with the front cover, a second friction material frictionally contactable with the lock-up piston, and third friction materials frictionally contactable with at least one of the plates. Three or more friction surfaces are constituted by outside friction surfaces formed on the first and second friction materials and each having a small area, and inside friction surfaces formed on the third friction materials and each having a large area.

Lock-up clutch

A torque fluctuation absorber includes a center plate rotatably arranged, a side plate arranged coaxially with and rotatably relative to the center plate, an elastic member accommodated in a space surrounded by the side plate and absorbing torque fluctuations generated between the side plate and the center plate, a cover member separating the space and an outside space from each other by covering a clearance between the center plate and the side plate, and a vent portion arranged inwardly in a radial direction of the side plate relative to the cover member and providing a ventilation between the space and the outside space.

A hydraulic control unit provided with oil pumps includes a first oil discharging outlet and a second oil discharging outlet, a high pressure route connected with the first oil discharging outlet, a medium pressure route with an oil pressure therein being lower than that in the high pressure route, a low pressure route with an oil pressure therein being lower than that in the medium pressure route, and a connection mode switching mechanism for selectively connecting a second oil discharging outlet with the high pressure route, the medium pressure route or the low pressure route. The connection mode switching mechanism includes a changeover valve selectively connecting the second oil discharging outlet with the medium pressure route or the low pressure route; and a changeover valve controlling device connecting the second oil discharging outlet with any of the medium pressure route and the low pressure route. The hydraulic control unit can minimize drive loss of an oil pump.

Hydraulic control unit for a hydraulic power transmission

In a fluid coupling wherein a turbine shell is welded to a turbine hub, it is necessary to take care of the strength of the welded portion because the turbine shell is displaced toward the pump blade as the torque thereof is transmitted. A fluid coupling () according to the present invention is provided with an input-side rotary constituent (A) including a pump blade (), to which is attached an input member, and an output-side rotary constituent (B) including a turbine shell (), to which is attached a turbine blade () opposed to the pump blade (), and a turbine hub, to which is coupled an output member (), the turbine hub () being welded to an inner peripheral portion of the turbine shell (), wherein the turbine shell () and the turbine hub () have contact surfaces (), respectively, extending along a rotational axis () of the fluid coupling (), and a joint portion () is formed by the welding on the contact surfaces () closer to the pump blade ().

Growing community of inventors

Toyota, Japan

Toshiya Yamashita