Browse Publications Technical Papers 2002-01-1294
2002-03-04

Development of Single Stage Input Coupled Split Power Transmission Arrangements and their Characteristics 2002-01-1294

In recent years there has been an increased interest in the continuously variable split power transmissions as these drive units are capable of vehicle launches and directional changes without using clutches. These tasks are accomplished by appropriately splitting power between the fixed mechanical and variable ratio branches. The power is recombined at the transmission output. A properly designed split power transmission arrangement will improve vehicular agility and reduce variator size.
This paper provides characteristics of six single stage input coupled continuously variable toroidal split power transmission arrangements. Mathematical equations are derived for speed, torque and power. A computer program that utilizes the capabilities of Matlab is developed. The program calculates the required fixed and variable branch gear ratios for the predefined variator, planetary and overall transmission ratios. Further, the program produces numerical results and visual plots of relationships between transmission ratio, variator ratio, planetary ratio, and the power flow through the transmission branches. Characteristics of the transmission arrangements are analyzed and compared and documented. Suggestions for practical use of the split power transmissions are given and methods to reduce the recirculated power through the variable and fixed branches are provided.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Development of Dual Stage Input Coupled Split Power Transmission Arrangements and their Characteristics

2002-01-0590

View Details

TECHNICAL PAPER

CVT Split Power Transmissions, A Configuration Versus Performance Study with an Emphasis on the Hydromechanical Type

2002-01-0589

View Details

TECHNICAL PAPER

Power Split Transmissions Versus Hydrostatic Multiple Motor Concepts - A Comparative Analysis

2004-01-2676

View Details

X