Continuously variable transmission
First Claim
1. A method for controlling a continuously variable transmission (CVT), wherein the CVT comprises a traction sun and a plurality of traction planets operably coupled to a carrier plate and to the traction sun, the method comprising:
- providing a skew-based control system comprisinga control reference nut mounted coaxially with a longitudinal axis of the CVT,a feedback cam operably coupled to the control reference nut and to the traction sun, the feedback cam positioned coaxially with the control reference nut, wherein the carrier plate is positioned coaxially with the feedback cam, anda skew cam coupled to the feedback cam and to the carrier plate, the skew cam configured to rotate the carrier plate about the longitudinal axis; and
operably coupling a neutralizer assembly to the skew-based control system, the neutralizer assembly configured to balance a plurality of axial forces generated in the CVT during operation.
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Accused Products
Abstract
Components, subassemblies, systems, and/or methods for continuously variable transmissions (CVT) are provided. In one aspect, a control system is adapted to facilitate a change in the ratio of a CVT. A control system includes a control reference nut coupled to a feedback cam and operably coupled to a skew cam. In some cases, the skew cam is configured to interact with carrier plates of a CVT. Various inventive feedback cams and skew cams can be used to facilitate shifting the ratio of a CVT. In some transmissions described, the planet subassemblies include legs configured to cooperate with the carrier plates. In some cases, a neutralizer assembly is operably coupled to the carrier plates. A shift cam and a traction sun are adapted to cooperate with other components of the CVT to support operation and/or functionality of the CVT. Among other things, shift control interfaces for a CVT are provided.
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Citations
19 Claims
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1. A method for controlling a continuously variable transmission (CVT), wherein the CVT comprises a traction sun and a plurality of traction planets operably coupled to a carrier plate and to the traction sun, the method comprising:
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providing a skew-based control system comprising a control reference nut mounted coaxially with a longitudinal axis of the CVT, a feedback cam operably coupled to the control reference nut and to the traction sun, the feedback cam positioned coaxially with the control reference nut, wherein the carrier plate is positioned coaxially with the feedback cam, and a skew cam coupled to the feedback cam and to the carrier plate, the skew cam configured to rotate the carrier plate about the longitudinal axis; and operably coupling a neutralizer assembly to the skew-based control system, the neutralizer assembly configured to balance a plurality of axial forces generated in the CVT during operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification