Abstract: To provide a push type driving belt, which is capable of preventing uneven wear of the ring and deterioration in durability of the ring, by preventing a transmission loss resulting from an internal slippage of the ring, and by positioning the ring properly with respect to the element. The push-type driving belt B comprises: an element 1, in which a recess 8 opening toward a diametrically outer circumferential side is formed in a width center thereof; and a ring 9, which is formed of single layer in its thickness direction using elastic material, and which is fitted into the recess 8 of the element 1 to fasten the elements 1 juxtaposed in a circular manner.

Abstract: A control system for a belt-type continuously variable transmission capable of preventing deterioration in fuel economy. A friction coefficient ?2 in a radially outer region of the tapered face of the driven pulley 7 is smaller than a friction coefficient ?1 in a radially inner region, and the control system comprises a speed change region setting means that increases frequency of carrying out a speed change operation within the radially inner region in case the energy saving mode is selected.

Abstract: A belt-driven continuously variable transmission adapted to reduce a frictional resistance between the movable sheave and the rotary shaft. The pulley includes the fixed sheave rotated integrally with the rotary shaft, and the movable sheave engaged with the rotary shaft in a manner to slide axially and to be rotated integrally with the rotary shaft. The driving belt is applied to the belt groove formed between the movable sheave and the fixed shave to transmit torque. The transmission is provided with the a passage for delivering fluid to the engagement mechanism engaging the rotary shaft with the movable sheave while allowing relative axial movement therebetween.

Abstract: A belt-driven continuously variable transmission includes a drive pulley, a driven pulley and a driving belt. Each pulley is formed by a fixed sheave integrated with a rotary shaft and a movable sheave fitted onto the rotary shaft in a slidable manner. A belt groove holding a driving belt is formed individually between conical surfaces of the fixed sheave and the movable sheaves being opposed to each other. The belt-driven continuously variable transmission changes a speed ratio continuously by altering an effective diameter of the driving belt by varying the groove width. A non-metallic belt made of resin material is used as the driving belt, and a friction coefficient of a radially inner region of each conical surface of driven pulley is smaller than that in a radially outer region.

Abstract: To provide a push type driving belt, which is capable of preventing uneven wear of the ring and deterioration in durability of the ring, by preventing a transmission loss resulting from an internal slippage of the ring, and by positioning the ring properly with respect to the element. The push-type driving belt B comprises: an element 1, in which a recess 8 opening toward a diametrically outer circumferential side is formed in a width center thereof; and a ring 9, which is formed of single layer in its thickness direction using elastic material, and which is fitted into the recess 8 of the element 1 to fasten the elements 1 juxtaposed in a circular manner.

Abstract: A friction transmission unit for transmitting power between input and output members by means of friction and capable of loss reduction and large torque transmission. Power is transmitted between a planar disk (16) and a roller (10), which contacts the upper surface of the planar disk (16). The profile of the peripheral surface (14) of the roller (10) which actually contacts the upper surface (20) of the disk (16) is expressed as z=a·sin h(bx2). This profile realizes a contact stress distribution which is constant over an area corresponding to approximately 80% in the width direction of the entire contact region. This profile also prevents formation of peak stresses near and at the edges of the contact region and, instead, enables formation of monotonic decrease of stress in areas near the edges.

Abstract: A friction transmission unit for transmitting power between input and output members by means of friction and capable of loss reduction and large torque transmission. Power is transmitted between a planar disk (16) and a roller (10), which contacts the upper surface of the planar disk (16). The profile of the peripheral surface (14) of the roller (10) which actually contacts the upper surface (20) of the disk (16) is expressed as z=a·sinh(bx2) This profile realizes a contact stress distribution which is constant over an area corresponding to approximately 80% in the width direction of the entire contact region. This profile also prevents formation of peak stresses near and at the edges of the contact region and, instead, enables formation of monotonic decrease of stress in areas near the edges.