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WO/1998/025055A1 |
A continuously variable transmission control method designed to determine an operating point from the number of revolutions of the primary disk (12) and the number of revolutions of the secondary disk (13). The operating point is assigne...
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WO/1998/020269A1 |
A continuously variable transmission including drive (1) and driven (2) pulleys rotatable about parallel axes. The drive pulleys (1) has a moveable drive pulley half (1c) axially moveable relative to a fixed drive pulley half (1b) to var...
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WO/1998/012457A1 |
The invention relates to a flexible drive mechanism with an input end and an output end wherein a flexible drive system (1) enables mechanical interaction between the input end and output end, affecting slip behaviour. Means (11) to affe...
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WO/1998/011364A1 |
The invention relates to a stepless speed change gear able to provide a continuously-selectable variation ratio in output angular velocity with respect to input velocity. The main characteristic of the invention is that the drive transmi...
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WO/1998/010205A1 |
A variable speed mechanism (20) or propelling an associated lawn mowing apparatus (10) has a variable pitch pulley assembly (40), a belt which connects the variable pitch pulley assembly (40) to a transmission, a control arm assembly (30...
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WO/1998/002679A1 |
A continuously variable transmission for an automotive vehicle comprises a drive pulley including axially first and second sheaves which define a pulley groove. The first sheave of the drive pulley is axially movable under an axial thrus...
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WO/1997/046816A1 |
The proposal is for a process for controlling a CVT of the bevel-pulley-belt type in which, on the occurrence of a wheel-locking drive situation, converter bridging clutch is disengaged and at the same time a forward or reverse drive clu...
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WO/1997/037158A1 |
A hydraulic control for operating an automatic gearbox, especially a continuously variable transmission, has at least one first and one second switching component (1, 2) for forward or reverse travel from a neutral position (N) to a driv...
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WO/1997/037159A1 |
A pressure controlling system for a CVT of the belt with bevelled pulley type is proposed in which, on the detection of a shift from the neutral or park position, the pressure in the primary and secondary pulley is raised to a first leve...
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WO/1997/034092A1 |
The invention concerns an infinitely variable Variomatic transmission. According to the invention, the coupling force is applied via a plurality of coupling means (4), for example coupling bars (15), disposed radially on the drive plate ...
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WO/1997/031200A1 |
A regulating system for a CVT (3) is proposed in which a corrector is fitted upstream of the control path, the variator. The disturbances and non-linearities in the control path (28) are taken into account in said corrector via a mathema...
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WO/1997/005407A1 |
The invention relates to a device for controlling the year ratio of a continuously variable transmission. The theoretical rotational speed or transmission ratio is fed to the signal input of a set-value filter (44). The time constant (T_...
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WO/1997/005402A1 |
A pulley (2) for variable speed in this variable speed transmission has a driving shaft (11) having in turn a spline shaft portion (12) of a required length, a pair of pulley bodies (10L, 10R) fitted over this spline shaft portion (12) i...
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WO/1997/004250A1 |
A drive clutch assembly (30) having a fixed sheave (44) and a movable sheave (46) rotatable with the drive shaft (34) of engine (18) comprising a multi-staged speed responsive or displacement system. The speed responsive system initially...
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WO/1997/001050A1 |
The invention concerns a hydraulic control unit for changing the hydraulic-fluid pressure to modify the locking force in the mitre-wheel axial-adjustment unit in a continuously variable wrap-around transmission (10). A pump (20) in an op...
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WO/1996/037717A1 |
A hydraulic emergency control for transmission ratio-dependent variation of the hydraulic oil pressure in a first and second hydraulic conical pulley axial adjustment mechanism of a continuously variable transmission (10) has a pump (80)...
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WO/1996/037716A1 |
A hydraulic emergency control for changing the hydraulic oil pressure in the hydraulic conical pulley axial adjustment mechanism of a continuously variable transmission (10) for varying the clamping force ratio has a pump (20) in an open...
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WO/1996/024787A1 |
A bicycle derailleur gear shifting system having a rotatable handgrip actuator coupled with a derailleur shifting mechanism through a control cable system so as to control the derailleur. The derailleur (50) includes an arcuate cable ent...
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WO/1996/020360A1 |
The invention pertains to a continuously variable drive mechanism with a tension member and adjustable belt pulleys or chain wheels. The drive mechanism consists of two segmented belt pulleys or chain wheels (6) with bolts (5), two hubs ...
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WO/1996/020364A1 |
The invention comprises a method for adjusting the tension of the contact part which yields greater precision in estimating the likely engine torque and thus a better apportionment of tension. For this purpose the engine control unit, wh...
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WO/1996/008333A1 |
A shaping machine for use with panels comprising a base (11) adapted to be associated with a support surface (16) which is adapted to support a panel, said base supporting a head member (18) which in turn supports a drill head (31), a di...
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WO/1996/008664A1 |
The invention concerns a method of controlling an electronically controlled, continuously variable transmission (3), according to which an electronic control device (15) determines a parameter K1 (24) on the basis of the input variables,...
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WO/1996/007039A2 |
A drive clutch assembly (30) having a fixed sheave (44) and a movable sheave (46) rotatable with the drive shaft (28) of an engine comprising a variable rate biasing or resistance system for urging a movable sheave (46) toward a retracte...
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WO/1995/027159A1 |
For an electro-hydraulically operable continuously variable transmission, the pressure on the moving taper discs must be such that the chain, the thrust member belt or the like does not slip. However, the pressure must not be excessive, ...
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WO/1995/023933A1 |
The proposal is for A device for supporting components of an adjuster for a continuously variable belt drive. Here, an axially fixed piston (11) is supported on a roller bearing (8). The inner (19) and outer ring (20) of the roller beari...
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WO/1995/023302A1 |
A method for controlling a vehicle equipped with a variable speed change gear comprising the steps of calculating a speed change ratio Base (i) at the time of steady running, which is a final target, from a vehicle speed VPS and a thrott...
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WO/1995/021340A1 |
Positively driven continuously variable speed drive unit. The drive unit is characterized in that it comprises a body (20) supporting a first plurality of pivotally mounted coplanar gears (14, 16), said gears (14, 16) forming together a ...
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WO/1995/018931A2 |
A variable ratio drive mechanism, suitable for a bicycle for example, has at least one gear whose effective radius is variable in a stepless manner in response to applied torque and/or in response to an external force. The gear may compr...
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WO/1995/016152A1 |
A synchronous belt drive with a high multiplication ratio for transforming a rotary movement into a translation or rotary movement has at least two rows of teeth with different pitches interconnected by a toothed belt. The rows of teeth ...
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WO/1995/014872A1 |
The electro-hydraulic drive control for an electronically controlled continuously variable drive (10) has a transmission regulating valve (23) which regulates the primary pressure of the pair of primary discs (11). In order to ensure rel...
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WO/1995/009996A1 |
A method of regulating a torque-controlled vehicular driveline including an engine, a continuously-variable-ratio transmission and a final drive, in which driver demand for a rise in engine speed is programmed to initiate a response in t...
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WO/1995/003503A1 |
The invention relates to a continuously variable positive planetary gear in which the transmission ratio can be varied via the eccentric shifting of planet wheels (21-24).
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WO/1994/029616A1 |
A drive arrangement of the kind incorporating a pulley of variable effective diameter having two sheave members (22, 23) and a drive ring (26) between the sheave members (22, 23) and able to run eccentrically when the sheave members (22,...
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WO/1994/019627A1 |
An arrangement is disclosed for guiding a movable disk (3) in a continuously variable transmission. The movable disk (3) turns on balls (4) embedded in a mounting (5). The mountings (5) are interconnected in a narrow area. The axial path...
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WO/1994/010001A1 |
Driving system (1) containing at a minimum a first planetary coupling (A), equipped with a central wheel spindle (5), a planetary spindle (6) and an annular ring spindle (8), a first driving component (I) coupled to the central wheel spi...
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WO/1993/012363A1 |
A derailer (30) for derailing a drive chain (28) from one sprocket to an adjacent sprocket of a multi-stage sprocket assembly (22) wherein operation of the derailer (30) thereof is automatically controlled by centrifugal force so that th...
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WO/1993/011375A1 |
A variable speed belt drive (20) of the type having a pair of shiftable discs (22, 24) received on respective input and output shafts (26, 34) with a drive belt (36) entrained thereabout further includes a cooperating housing backbone an...
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WO/1993/007045A1 |
A pulling element (1) is arranged over a driving wheel (2) and a driven wheel (3). Both wheels (2 and 3) and the pulling element (1) are provided with corresponding teeth and recesses. At least one of the wheels (2, 3) has a variable, ad...
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WO/1993/006388A1 |
A pulley mounted at the output of a drive shaft is used in a variable-speed belt drive (11) in which pairs of generally cylindrical toothed flyweights (35) engage toothed racks (37, 39) in order to vary the winding diameter of said pulle...
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WO/1993/000531A1 |
A process is disclosed for controlling an infinitely variable transmission provided with an electro-hydraulic control, a selector device and a controllable starting clutch of a motor vehicle driven in particular by an internal combustion...
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WO/1993/000229A1 |
A process is disclosed for controlling a preferably electro-hydraulically actuated infinitely variable transmission of a motor vehicle provided with an internal combustion engine. The transmission ratio is increased during braking, in pa...
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WO/1993/000532A1 |
A process is disclosed for controlling a preferably electro-hydraulically actuated infinitely variable transmission of a motor vehicle driven in particular by an internal combustion engine on the basis of several characteristic control c...
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WO/1992/021894A1 |
This invention includes a belt tensioner (10) in combination with a variable speed drive (8), which tensioner (10), upon command, uses a pump (26) continuously driven by a fixed diameter pulley (18) positioned by a rotary actuator (16) t...
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WO/1992/018792A1 |
Prior art transmission with positively interlocking parts suffer from the disadvantage that they cannot be varied continuously. This results in complicated shift procedures and losses in power. The aim of the invention is to propose a tr...
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WO/1992/017718A1 |
A toothed wheel with a variable number of teeth has a toothed ring (4) formed by a driving chain (2) or belt. The reference diameter of the toothed wheel can be modified by adding or removing individual links (1) by means of an auxiliary...
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WO/1992/016773A1 |
A bicycle gear shifting system (10) having rotatable front and rear handgrip shift actuators (60, 66) operatively associated with control cables for shifting respective front and rear derailleur mechanisms. In some forms of the invention...
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WO/1992/008911A1 |
In a vehicle run by a driving source such as an engine and a motor, a groove width of a drive pulley (19) of a non-stage transmission (B) is increased or decreased by a change gear ratio changing means (61) using a motor (62) as its driv...
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WO/1991/019918A1 |
A drive device (7) with variable transmission ratio to the drive of an auxiliary aggregate of a motor vehicle has a belt pulley (11) with a chamber (38) connected to a hydraulic medium reservoir (30). The centrifugal action of the hydrau...
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WO/1991/017373A1 |
A reversible drive mechanism (25) comprises a pair of pulleys (33, 34) mounted for contrarotation on a driven shaft (31). A clutch assembly having clutch plates (36, 42) is selectively engageable with the pulleys (33, 34) to rotate the d...
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WO/1991/014613A1 |
The invention relates to a variable ratio drive mechanism which operates to adjust the path of an endless drive belt (34) in response to a remotely located control input. Circumferentially spaced sheave segments (32) include multiple cam...
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