Abstract: A speed ratio of a continuously variable transmission is controlled by varying the effective diameters of drive and driven pulleys mounted respectively on input and output shafts with a V-belt trained around the drive and driven pulleys. The effective diameter of the drive pulley is increased based on a signal proportional to a vehicle speed and reduced based on a signal proportional to a throttle valve opening degree and a signal proportional to a speed ratio.

Abstract: A control method controls a belt-and-pulley type continuously variable transmission having drive and driven pulleys mounted respectively on input and output shafts, a V-belt trained around the drive and driven pulleys, and an oil pressure source and an oil reservoir operatively coupled to first and second hydraulic pressure chambers for axially moving the movable conical members of the drive and driven pulleys to vary effective diameters of the drive and driven pulleys for thereby controlling a speed ratio. The movable conical members of the driver and driven pulleys are movable in synchronism with each other. The hydraulic pressure chamber of one of the driver and driven pulleys, the effective diameter of which is to become larger at that time, is first brought into communication with the oil pressure source.

Abstract: A continuously variable automotive transmission includes a fluid torque converter adapted to be connected to an engine and having a turbine shaft, a single driver gear or two driver gears fixedly mounted on the turbine shaft, and a V-belt continuously variable transmission mechanism.

Abstract: A power transmitting V-belt comprising an endless metal band mounted on supporting surfaces of a multiplicity of V-shaped metal blocks so linked to one another that adjacent blocks are rotatable relative to each other around an axis which is located substantially on the block contact surface of the band that engages the supporting surfaces of the metal blocks. This minimizes relative slippage between the metal band and the metal blocks during running of the V-belt.

Abstract: A V-pulley to be used in a belt type continuously variable transmission, which V-pulley comprises a stationary pulley half fixedly mounted to a transmission shaft and a movable pulley half coupled slidably to the shaft via a plurality of rows of ball keys and cooperating with the stationary half to support a V-belt. A plurality of coil springs resiliently biasing the movable half toward the stationary half too impart an initial tension to the V-belt. A hydraulic operating device includes a first hydraulic member fixedly mounted to the shaft and a second hydraulic member disposed on the movable pulley half to define a hydraulic chamber against the first member for operating the movable half by hydraulic pressure fed to the hydraulic chamber. A control valve for controlling the pressure supply to the device.

Abstract: A hydraulic pressure controller is provided between a hydraulic actuator for changing the effective radii of a drive V-pulley mounted on an input shaft and a driven V-pulley mounted on an output shaft and a hydraulic pump is provided for supplying hydraulic pressure to the hydraulic actuator. The hydraulic pressure controller is controlled by an input torque sensor and a speed change ratio sensor, whereby the hydraulic pressure supplied to the hydraulic actuator is automatically controlled in proportion to the input torque received by the input shaft and the speed change ratio between the input and output shafts.

Abstract: A belt-and-pulley continuously variable transmission comprises a driver pulley mounted on an input shaft and comprising a fixed conical member and a movable conical member, a driven pulley mounted on an output shaft and comprising a fixed conical member and a movable conical member, and a V-belt trained around the driver and driven pulleys. The movable conical members are axially movable to vary the effective diameters of the driver and driven pulleys for controlling the transmission ratio. The movable conical members are disposed on opposite sides of the V-belt. The transmission further includes a main servomechanism operatively coupled to the movable conical members for controlling axial movement of the movable conical members.

Abstract: In a power transmitting V-belt comprising an endless metal band mounted on a multiplicity of V-shaped metal blocks linked so that a semi-cylindrical recess provided on one metal block of each adjacent pair of V-shaped metal blocks is engaged by a semi cylindrical projection, such as a roller, associated with the other metal block of the adjacent pair to pivotally link the adjacent blocks. A relief portion having a suitable length is provided at an axially central portion of the recess to be recessed more deeply than the remainder of the recess. This allows uniform contact and satisfactory lubrication between the projection and the recess without interference from the central portion.

Abstract: A power transmitting V-belt comprising an endless metal band held by stopper members on a multiplicity of V-shaped metal blocks which are linked to one another, wherein a pair of free ends of each stopper member are retained in a pair of retaining grooves on the associated metal block, which pair of retaining grooves include a tapered guide section adapted to guide the free ends of the stopper member from its free state to its stressed state retained in the retaining grooves at the time of mounting the stopper member to the metal block. This simplifies the assembling procedure.

Abstract: A V belt (1; 201) for power transmission to be stretched over a driving pulley (100) and a driven pulley to effect power transmission therebetween, the V belt comprising a looped metallic belt (2), a plurality of V-shaped metallic blocks (3; 203) fitted on the metallic belt in a continuous manner along the length of the metallic belt, and a plurality of stoppers (5; 75) each respectively applied to one of the V-shaped blocks to cooperate with a concave groove (3b; 203b) of the V-shaped block so as to surround the metallic belt. At least a part (5d; 75d) of a base portion (5a; 75a) of the stopper is curved in a radial direction of the V belt to permit a resilient uniform opening of both side portions (5b; 75b) thereof in lateral directions (Y).

Abstract: A V belt (1; 201) for power transmission to be stretched over a driving pulley (100) and a driven pulley to effect power transmission therebetween, the V belt comprising a looped metallic belt (2), a plurality of V-shaped metallic blocks (3; 203) fitted on the metallic belt in a continuous manner along the length of the metallic belt, and a plurality of stoppers (5; 75) each respectively applied to one of the V-shaped blocks to cooperate with a concave groove (3b; 203b) of the V-shaped block so as to surround the metallic belt. At least a part (5d; 75d) of a base portion (5a; 75a) of the stopper is curved in a radial direction of the V belt to permit a resilient uniform opening of both side portions (5b; 75b) thereof in lateral directions (Y).

Abstract: A power transmission V belt for being trained around driver and driven pulleys for transmitting power therebetween includes a loop-shaped metallic belt and a plurality of metallic V blocks mounted on the metallic belt successively in the longitudinal direction thereof. A a self-lubricating, heat-resistant, wear-resistant hard layer is coated on at least one of a radially inward surface and opposite side surfaces of the metallic belt, and radially outward surface and opposite side surfaces of the V blocks. The loop-shaped metallic belt comprises a stack of metallic members, and the self-lubricating, heat-resistant, wear-resistant hard layer is coated on at least one of confronting surfaces of superimposed ones of the metallic members.

Abstract: Disclosed is an improved laminated metallic belt consisting of at least two layers of an endless metallic band for use in a torque transmission device, which can transmit torque between two pulleys having variable effective radii, in combination with a plurality of metallic blocks which have surfaces contacting the innermost layer of the laminated metallic belt and are arranged along the laminated metallic belt. The metallic belt according to the present invention may be made of precipitation hardening martensitic stainless steel or maraging steel which have favorable properties as to toughness, mechanical strength and the adaptability for welding required for making an endless laminated metallic belt, but lack the surface hardness to ensure relatively favorable durability. The durability of the steel is improved according to the present invention by a nitride layer and/or an electroless nickel plating layer formed on the side edges of the endless metallic band.

Abstract: A vehicular speed change gear wherein a stepless V-belt transmission and a stepped gear transmission are disposed in series in a power transmission system connecting an engine crankshaft and a driving wheel together. An automatic speed change actuator, which automatically actuates the speed change operation of the stepless transmission in association with an engine throttle valve opening and a vehicle speed is connected to the stepless transmission, and a manual speed change actuator is connected to the stepped transmission for manually actuating the speed change operation of the latter.

Abstract: A V-belt transmission apparatus made of a pair of endless metallic belts and a plurality of V-shaped metallic members disposed in series in a stacked condition on the belts. Each V-shaped metallic member has laterally open, channel shaped grooves on both sides with the metallic belt on each side being inserted in the groove on that side. Each V-shaped metallic member includes a main body having a projection portion and a stopper member prepared separately from and attached to the projection portion of the main body. The stopper member forms upper wall portions defining the channel shaped grooves together with the main body.

Abstract: A belt type continuous reduction gear mechanism, in which a V-belt is made to run under tension between drive and driven V-pulleys each equipped with a fixed pulley half and a movable pulley half made movable back and forth relative to the fixed half for adjusting an effective radius. The drive and driven V-pulleys are equipped with actuators for moving the respective pulley halves thereof back and forth. There is interposed between the actuators a coaction mechanism for effecting the coactions of the same.

Abstract: A V-belt transmission mechanism having a V-belt of metallic blocks with inclined surfaces and pulleys having V-grooves about the periphery thereof. The V-belt includes tension strips extending in a continuous loop in cooperation with the blocks, a rubber holding belt and rollers between blocks. The pulleys include coatings of resilient material fused to the V-grooves of the pulleys.

Abstract: A power transmission V-belt comprising an endless belt, a plurality of V-shaped metal members and a plurality of intermediate members. The endless belt is mounted between drive and driven pulleys. The plurality of V-shaped metal members are arranged on the endless belt serially in the longitudinal direction thereof. Each of the V-shaped metal members is formed with a groove to provide a contacting surface in contact with an inner surface of the endless belt. The plurality of intermediate members are positioned at inner side of the endless belt. Each of the intermediate members is interposed between neighboring V-shaped metal members. Each of the V-shaped metal members has both sides in running direction of the endless belt and is formed with receiving surfaces for receiving one of the roller members. The receiving surfaces are in arcuate form. The radius of curvature of one of the receiving surfaces is substantially equal to that of the intermediate members.

Abstract: A belt type continuous reduction gear mechanism, in which a V-belt is made to run under tension between drive and driven V-pulleys each equipped with a fixed pulley half and a movable pulley half made movable back and forth relative to the fixed half for adjusting an effective radius. The drive and driven V-pulleys are equipped with actuators for moving the respective pulley halves thereof back and forth. There is interposed between the actuators a coaction mechanism for effecting the coactions of the same.

Abstract: A V-belt transmission is provided which comprises V-groove pulleys and an endless belt surrounding the pulleys. A plurality of V-shaped belt engaging metallic members are positioned along the endless belt in the longitudinal direction thereof, each having a belt engaging surface for engaging the belt. A plurality of intermediate members are positioned between adjacent engaging members, with the intermediate members being positioned on the inside of the endless belt. Each of the engaging members includes a receiving surface for contacting the adjacent intermediate member, with at least one of the receiving surfaces being shaped to apply a force to the intermediate member in the longitudinal direction of the belt when the engaging member is brought into contact with the V-groove of the V-groove pulleys. The belt engaging surface of the engaging member is aligned with the mid-point of the height of the inclined side surfaces thereof which contact the V-groove of the V-groove pulleys.