Abstract: A toroidal-type continuously variable transmission, has: a casing; an input rotary shaft; a pair of input side disks each including an input side inner surface and respectively supported on the input rotary shaft; an output cylinder supported on the input rotary shaft; a pair of output side disks each including an output side inner respectively supported on the periphery of the output cylinder; an output rotation transmission member fixed to the outer peripheral surface of the middle portion of the output cylinder; support members interposed respectively between the input side inner surfaces and the output side inner surfaces; power rollers being contacted with the input side inner surfaces and the output side inner surfaces; and, a rolling bearing disposed between the input side inner surface and the output side inner surfaces and rotatably supporting the output cylinder.

Abstract: A toroidal-type continuously variable transmission has an input disk, an output disk, a pressing device for pressing said first disk toward said second disk, a plurality of trunnions having a pair of first support shafts for supporting a plurality of power rollers, a pair of support plates for supporting the first pivot shafts of each of the trunnions; and a pair of swing brackets each including a second pivot shaft parallel to the first pivot shaft of the trunnion, the swing brackets being respectively supported so as to be swingable about the second pivot shafts with respect to the support plates. The first pivot shafts of the trunnion are respectively supported so as to be swingable with respect to the support plates through the swing brackets.

Abstract: A toroidal-type continuously variable transmission has a pair of input and output disks each including a first traction surface, power rollers each including a second traction surface and respectively interposed between the first traction surfaces of the input and output disks, an oil passage for guiding lubricating oil to the traction surfaces of the power rollers, input disk and output disk, and a mesh filter disposed on the exit side of the associated oil passage.

Abstract: A continuously variable transmission apparatus includes a toroidal-type continuously variable transmission, a planetary gear type transmission and a clutch apparatus that connects the toroidal-type continuously variable transmission and the planetary gear type transmission. The clutch apparatus includes: a low speed clutch engaged for realizing a low speed mode and disengaged for realizing a high speed, a high speed clutch engaged for realizing the high speed mode and disengaged for realizing the low speed mode and a controller. The controller controls the transmission ratio of the toroidal-type continuously variable transmission so that rotational speeds of members connected via the clutch apparatus equals with each other, and then disengages the one of the low speed clutch and the high speed clutch after engaging the other.

Abstract: A control apparatus for controlling transmission ratio of a toroidal-type continuously variable transmission unit of a continuously variable transmission apparatus, the continuously variable transmission apparatus has: a toroidal-type continuously variable transmission unit, which changes a transmission ratio between pair of disks by shifting trunnions in the axial direction of pivot shafts by using actuators; and, a differential unit of a gear type including a combination of a plurality of gears, the control apparatus having: rotation speed control unit; transmission ratio setting unit; oil pressure measuring unit; and, transmission ratio correcting unit operating in response to a deviation of a pressure difference between a measured value by the oil pressure measuring unit and a target value of a torque passing through the toroidal-type continuously variable transmission unit, and adjusting the transmission ratio of the toroidal-type continuously variable transmission unit so as to eliminate the deviation.

Abstract: A rotational speed of an input side disk is detected by an input side rotation sensor, and a rotational speed of an output side disk is detected by an output side rotation sensor, respectively. Based on detected values of the two sensors, a transmission ratio of a toroidal type continuously variable transmission is calculated. Further, a rotational speed of the output shaft is calculated from the transmission ratio and a gear ratio of a planetary gear type transmission. In a state in which the select lever selects no-running condition, the transmission ratio of the toroidal type continuously variable transmission is controlled such that the rotational speed of the output shaft becomes null or at an extremely low speed even when the running state is selected at the instance. Further, a position of a control valve apparatus under the state is stored to a controller.

Abstract: A toroidal-type continuously variable transmission, includes: an input shaft; a pair of mutually opposed input and output disks disposed side-by-side in an axial direction of the input shaft; a pressing mechanism pressing said input disk toward said output disk; a hollow shaft disposed around an outer periphery of the input shaft concentrically with the input shaft, and connecting the pair of input disks to each other; an oil hole formed in a no-penetrating portion of the input shaft where the input shaft does not penetrate through the hollow shaft, and opened on an outer peripheral surface of the no-penetrating portion; and, an oil passage formed between an inner peripheral surface of the hollow shaft and an outer peripheral surface of a penetrating portion of the input shaft where the input shaft penetrates through the hollow shaft.

Abstract: In a toroidal continuously variable transmission the amount of traction oil provided to contact areas between the power rollers and the input and output discs is increased as a power to be transmitted is increased. Nozzle holes formed in rockable trunnions of the transmission so that the traction oil ejected from the nozzle holes is sprayed to circumferential positions of inner surfaces of input and output discs that are in contact with peripheral surfaces of power rollers. Transmission efficiency is enhanced while maintaining endurance and reliability without supplying excessive traction oil.

Abstract: A toroidal-type continuously variable transmission, includes: an input shaft; a pair of mutually opposed input and output disks disposed side-by-side in an axial direction of the input shaft; a pressing mechanism pressing said input disk toward said output disk; a hollow shaft disposed around an outer periphery of the input shaft concentrically with the input shaft, and connecting the pair of input disks to each other; an oil hole formed in a no-penetrating portion of the input shaft where the input shaft does not penetrate through the hollow shaft, and opened on an outer peripheral surface of the no-penetrating portion; and, an oil passage formed between an inner peripheral surface of the hollow shaft and an outer peripheral surface of a penetrating portion of the input shaft where the input shaft penetrates through the hollow shaft.

Abstract: A toroidal-type continuously variable transmission includes an oil supply passage formed in a trunnion, for lubricating bearing parts supporting power rollers. The oil supply passage is structured by a groove formed in the inner surface of the trunnion and a plate-shaped cover member for covering the groove.

Abstract: A double-cavity half-toroidal type continuously variable transmission comprises an input shaft rotatable by means of a drive source, first and second input disks rotatable integrally with the input shaft, first and second output disks opposed to corresponding input disks, and a hydraulic loading mechanism. The hydraulic loading mechanism includes first and second hydraulic chambers arranged in the axial direction of the input shaft. The first hydraulic chamber is defined by the back surface of the first input disk, an end face of the first disk member, etc. The second hydraulic chamber is defined by the inner end face of the first cylinder, an end face of the second disk member, etc. The first and second hydraulic chambers are simultaneously supplied with pressurized oil by means of a pressure source. Under the pressure of the oil, the first input disk is pressed toward the first output disk, and the second input disk is pressed toward the second output disk through the medium of an interlocking portion.

Abstract: A toroidal-type continuously variable transmission, has first and second disks respectively including inner surfaces; power rollers interposed for transmitting power; a pressing device for pressing the first disk toward the second disk; a main oil pressure control unit for non-electrically detecting the power for setting, as a target value, an oil pressure necessary for the pressing device when a transmission ratio between the first and second disks is a transmission ratio requiring a maximum pressing force, and increase the target value as the pressing force increases; an oil pressure correcting apparatus for electrically finding a necessary value of the oil pressure, the necessary value corresponding to the optimum value of pressing force generated by the pressing device, and also for introducing an oil pressure of a value into the pressing device, the oil pressure of the value being obtained by subtracting a correction value from the target value.

Abstract: A toroidal-type continuously variable transmission includes three trunnions and power rollers in a single cavity. One of the trunnions is shifted by a pair of oil pressure actuators, each of a single-acting type. The remaining two trunnions are respectively shifted by separate oil pressure actuators, each of a double-acting type.

Abstract: In a toroidal continuously variable transmission the amount of traction oil provided to contact areas between the power rollers and the input and output discs is increased as a power to be transmitted is increased. Nozzle holes formed in rockable trunnions of the transmission so that the traction oil ejected from the nozzle holes is sprayed to circumferential positions of inner surfaces of input and output discs that are in contact with peripheral surfaces of power rollers. Transmission efficiency is enhanced while maintaining endurance and reliability without supplying excessive traction oil.

Abstract: A double-cavity toroidal-type continuously variable transmission includes a case, a drive shaft and a toroidal transmission mechanism portion. The toroidal transmission mechanism portion includes a gear housing for supporting an output gear, and a yoke for supporting a pivot shaft of a trunnion in an oscillatable manner. The support post for supporting the yoke and a fixing member for fixing the gear housing and the support post to the case are connected together or are formed as an integral body.

Abstract: A control apparatus for controlling transmission ratio of a toroidal-type continuously variable transmission unit of a continuously variable transmission apparatus, the continuously variable transmission apparatus has: a toroidal-type continuously variable transmission unit, which changes a transmission ratio between pair of disks by shifting trunnions in the axial direction of pivot shafts by using actuators; and, a differential unit of a gear type including a combination of a plurality of gears, the control apparatus having: rotation speed control unit; transmission ratio setting unit; oil pressure measuring unit; and, transmission ratio correcting unit operating in response to a deviation of a pressure difference between a measured value by the oil pressure measuring unit and a target value of a torque passing through the toroidal-type continuously variable transmission unit, and adjusting the transmission ratio of the toroidal-type continuously variable transmission unit so as to eliminate the deviation.

Abstract: In a toroidal type continuously variable transmission, first pivot shafts provided on both ends of first trunnions are supported within support holes formed in yokes secured to an inner surface of a casing. The support portions are provided with ball splines and radial needle bearings. During operation, loads acting on the first trunnions are canceled within the yokes. Axial displacements and rocking displacements of the first trunnions are effected smoothly by the ball splines and the radial needle bearings.

Abstract: A toroidal-type continuously variable transmission, includes: a trunnion including: a support plate portion; and a pair of bent wall portions formed in longitudinal-direction two end portions of the support plate portion and bent on an inner surface side of the support plate portion, the pivot shafts being disposed concentrically with each other on outer surfaces of the bent wall portions; a trunnion shaft formed integrally with the pivot shaft; an oil pressure piston fitted with an outer peripheral surface of the trunnion shaft for moving the trunnions along the axial direction of the pivot shaft; and, a cut-away portion formed in the outer peripheral surface of the trunnion shaft for forming, between the cut-away portion and the oil pressure piston, an oil passage for a lubricating oil to be supplied to the bearing for a power roller.

Abstract: A power roller bearing of a toroidal-type continuously variable transmission unit that is used for a transmission of an automobile or the like comprises a power roller, an outer race, balls, a retainer, etc. Annular raceway grooves are formed individually on the respective opposite end faces of the outer race and the power roller. Treated-surface layers for enhancing the endurance of the power roller bearing are formed individually on the respective surfaces of the raceway grooves. The treated-surface layers include super-finished surfaces with the surface roughness of 0.05 Ra or less, formed individually on the raceway grooves, and low-friction layers formed individually on the super-finished surfaces. Alternatively, the treated-surface layers include residual compression stress layers formed on the respective surface layer portions of the raceway grooves by shot-peening.

Abstract: It is an object of the present invention to provide a mounting structure of a thermal shield for an oil pump which makes it possible to securely mount the thermal shield at one point with high reliability and at a low cost. To achieve this object, a thermal shield for preventing radiant heat from an exhaust pipe from being transmitted to an oil pump is securely clamped to a support plate portion of a bracket which is disposed contiguous to the thermal shield. The thermal shield and the bracket are provided with an engaging protrusion portion and a positioning hole respectively. The thermal shield and the bracket are positioned through engagement of the engaging protrusion portion with the positioning hole.