Comparison of Operational Characteristics in Power Split Continuously Variable Transmissions 2006-01-3468
Continuously variable transmissions (CVT) provide seamless shifting in vehicle operation, allowing the engine to operate at a nominal speed range resulting in lower fuel consumption and emissions. However, typical CVTs suffer from either low shaft-to-shaft efficiency or low torque handling capabilities. The power split CVT combines the variability of the CVT with the efficiency of a mechanical transmission, providing potential benefits for both on road and off road vehicles. By modifying the architecture and layout of a power split transmission, the characteristics and maximum speed of the vehicle drive cycle can be altered. This paper will present a comparison between the different architectures of power split transmissions utilizing hydraulic units as the variators, with a focus on efficiency, control effort, and system complexity. Applications based on the characteristics of the specific transmission architectures will be suggested.
Citation: Carl, B., Ivantysynova, M., and Williams, K., "Comparison of Operational Characteristics in Power Split Continuously Variable Transmissions," SAE Technical Paper 2006-01-3468, 2006, https://doi.org/10.4271/2006-01-3468. Download Citation
Author(s):
Blake Carl, Monika Ivantysynova, Kyle Williams
Affiliated:
College of Engineering, Purdue University
Pages: 17
Event:
SAE 2006 Commercial Vehicle Engineering Congress & Exhibition
Also in:
Fluid Power for Mobile, In-Plant, Field and Manufacturing-SP-2054