Two input epicyclical type transmission mechanisms with application to hybrid vehicles

Dissertant

Ismail, Isam Luaybi

University

University of Technology

Faculty

-

Department

Department of Electromechanical Engineering

University Country

Iraq

Degree

Ph.D.

Degree Date

2009

English Abstract

Approaches for the analysis of epicycle-type gear trains introduced in this thesis.

The work is divided into two parts.

In the first part the velocity ratios of epicycles gear mechanisms (EGMs) are investigated.

A new definition for the fundamental gear entity (FGE) is introduced based on the fundamental circuit diagram.

The identification of PGEs have led to the derivation of a single kinematic equation that can be used to investigate the kinematic characteristics associated with various FGEs in terms of the gear ratios of their gear pairs.

A methodology for the enumeration of feasible clutching sequences for a given epicycles gear mechanism (EGM) is presented.

In the second part, torque and power flow analysis and new design for two-input epee lie-type transmission mechanisms are presented.

The studies on power flow analysis of EGMs are mostly done in the context of efficiency formulations.

In the opinion of the author, the design process of two-input mechanism involves not only finding the configuration that provides the correct velocity ratios, but also meets other dynamic and kinematic requirements and ensures that the two inputs have a mutually constructive nature.

To demonstrate the analysis, new transmissions are used to show how the torque acting on each link of an epicycles gear train (EGT) can be systematically solved in terms of input torque) and / or controlled output torque.

The results presented are meant to deepen the knowledge as to how and why a two-input epicycles-type transmission should operate in a certain way under the given conditions.

In the process, this work explores the theoretical basis of operation of the Toyota Hybrid System (THS) and the root cause of some confusion in the field of EGTs.

An efficient methodology for the assignment of the various links of a given two-input EGM is developed for the design and analysis of two-rider velocity changer to be used as a power coupling in a new generation of tandem bicycles, New designs of parallel hybrid transmissions with only one electric motor / generator (MG) and without any rotating clutches are presented also.

These designs provide some of the benefits and flexibility of a power-split design but using conventional available components in a simpler mechanical layout.

Three commonly used transmission gear sets are used for this purpose; Simpson, Ravigncau, and Type-6206 gear sets.

They are considered adaptable to suit the new design of the hybrid mobile robot.

The new transmission can run a small output engine in its efficient operating region relatively steady.

Depending on the driving conditions, the new hybrid use, only the power of MG, allocates and combines the driving powers from both MG and engine, or divides the power from the engine into two parts; part to drive the vehicle and the remaining part to drive the generator.

The system maximizes the vehicle's overall efficiency by using MG to run the vehicle under operating conditions in which the engine's efficiency is low and by generating electricity under operating conditions in which the engine's efficiency is high.

The electric motor also assists the engine during acceleration at any vehicle's speed.

Main Subjects

Mechanical Engineering

Topics

• Internal combustion engines

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-305018