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CVT use in Outboard Marine Engines
Boaters typically measure performance of their motors in two competing... more >> |
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Simplicity, Innovation, Power. See for yourself how the MCVT works. |
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Recognizing that close collaboration with university researchers can significantly advance certain technologies, InterSyn invested in the development of a transmission test facility at the University of Bath. This facility enables performance evaluation studies to be undertaken on a wide range of transmissions – including manual, automatic, auto-shift manual, and continuously/infinitely variable transmissions (CVTs/IVTs). The facility features an ABB twin dynamometer and drive system arrangement capable of 109kW continuous rating.
Read more about this leading research facility by clicking here:
http://www.bath.ac.uk/mech-eng//auto/transmission.php
Computer Modeling of the Milner CVT
InterSyn and leading researchers at Bath University have collaborated to develop a comprehensive Matlab Simulink model that can be used to help guide the design of new CVTs and optimize existing CVTs. Inputs to the model include: part sizes and geometry (ball and race radii; ball screw parameters; characteristics of any gear trains connected to the MCVT); material properties (Elastic Modulus of solid components; temperature and viscosity of the traction fluid); and input speed and output torque. Outputs from the model include: torsional loading on critical components; necessary control arm torque; size of the contact patch between the CVT ball and races; oil film thickness; output speed and input torque. The model is also able to calculate the overall transmission ratio of the CVT/IVT for any position of the MCVT’s shift actuator based on idealized geometry of the MCVT.
This advanced modeling has been validated through tests on several MCVT designs and enables InterSyn to rapidly scale up or down the size of the MCVT to suit a given application. Accurate modeling capabilities enable InterSyn to reduce both development costs and time to market for new MCVT designs.
Additional development of the computer model is ongoing and includes inputs to study the effects of new traction fluids, materials and operating conditions.
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