Research Papers

Novel Configurations for Hybrid Transmissions Using a Simple Planetary Gear Train

[+] Author and Article Information
Huu-Tich Ngo

Department of Mechanical Engineering,
National Cheng Kung University,
1 University Road,
Tainan 70101, Taiwan
e-mail: huutichbk@hotmail.com

Hong-Sen Yan

Department of Mechanical Engineering,
National Cheng Kung University,
1 University Road,
Tainan 70101, Taiwan
e-mail: hsyan@mail.ncku.edu.tw

1Corresponding author.

Manuscript received May 1, 2015; final manuscript received October 8, 2015; published online November 24, 2015. Assoc. Editor: David Dooner.

J. Mechanisms Robotics 8(2), 021020 (Nov 24, 2015) (10 pages) Paper No: JMR-15-1103; doi: 10.1115/1.4031952 History: Received May 01, 2015; Revised October 08, 2015; Accepted October 14, 2015

This paper presents a design approach to systematically synthesize feasible configurations for series–parallel and parallel hybrid transmissions subject to design constraints and required operation modes using a simple planetary gear train (PGT). The configuration synthesis process includes two main steps: (1) assign inputs and output powers to the PGT subject to design constraints by the power arrangement process and (2) assign clutches and brakes to the obtained systems subject to desired operation modes by the clutch arrangement process. By applying the proposed design approach, 9 clutchless and 31 clutched configurations for series–parallel and parallel hybrid transmission systems are synthesized, respectively. For each type of the hybrid systems, we analyzed kinematics and power flows of a new configuration to demonstrate the feasibility of the synthesized systems. The design approach can be used to systematically synthesize future hybrid transmissions with different mechanisms, design constraints, and desired operation modes.

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Grahic Jump Location
Fig. 5

Three types of hybrid systems using a simple PGT

Grahic Jump Location
Fig. 8

Series–parallel hybrid transmissions

Grahic Jump Location
Fig. 4

The blocked simple PGTs

Grahic Jump Location
Fig. 3

The 1DoF simple PGTs

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Fig. 2

Schematic diagrams of existing hybrid transmissions: (a) Prius system [14], (b) Chevy Volt system, and (c) Ehsani's system [23]

Grahic Jump Location
Fig. 1

Two typical hybrid systems




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