Abstract
This paper proposes a full-hybrid driveline based on an electric continuously variable transmission (e-CVT), which is inspired by the car industry’s most successful solution. The paper describes the operating principle, the system architecture, and the control scheme of the proposed driveline. An analysis of four possible operating modes shows that the e-CVT driveline leads to a performance similar to that of conventional tractors, as well as unusual features such as power boost, full-electric mode, optimized auxiliary drive and electric power delivery capability. The compact layout proposed for the e-CVT also makes it possible to simplify the overall layout of the tractor, particularly during the installation of both the thermal engine and the cooling system.
Highlights
The electric continuously variable transmission (e-CVT) system is the most widely used full-hybrid–electric drive system configuration in automobiles
This paper extends the description of the basic principles of applying the e-CVT to the tractor, proposes a design criterion that provides detailed data of all the subsystems, describes a reference control scheme for hybrid mode, and analyzes the behavior of the driveline in the hybrid mode under the various typical operating conditions that can occur for an agricultural tractor
A solution for full-hybrid transmission is investigated in this paper for application in agricultural tractors
Summary
The electric continuously variable transmission (e-CVT) system is the most widely used full-hybrid–electric drive system configuration in automobiles. This solution, introduced in 1997 [1], has been largely demonstrated to have the functional requirements, performance, efficiency, and manufacturing complexity to be compatible with the automotive sector. The characteristics of a full-hybrid e-CVT transmission for cars are as follows: Published: 21 October 2021 . Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. It makes the ratio between engine speed and wheel speed continuously variable over a very wide range
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