Technology Overview

Kinetics Drive Solutions Inc. (patent pending) HMIVT – hydro-mechanical infinitely variable transmission is based on hydrostatic/mechanical power-split technology, providing simple operation; offering reduction in pollutant emissions as well as improved fuel economy. It provides integration throughout the power-train via the KDS iVtrac CAN bus control software.

The KDS Hydro-Mechanical IVT technology was born out of the desire to provide the advantages of infinite control of a hydrostatic drive with the efficiency of direct gear drives. KDS has achieved this goal by combining a hydrostatic transmission with a planetary gear-set in a hybrid configuration. Such a device provides a dual power path through the transmission that is parallel in nature, permitting it to transfer power in any of three modes - purely hydraulic, combined hydraulic and mechanical, or purely mechanical.

The variable component is hydrostatic and operates in combination with the power split planetary in a continuously variable balance of torque. Power flow is transferred without jerks or interruptions in power flow. The end of one driving range represents the beginning of the next one, making it possible to travel continuously through the entire transmission range - one of the reasons for the transmission's high efficiency.

The KDS HMIVT’s do not use traction fluid or belts and are thus not limited by physics to any kilowatt or torque range while mechanical efficiency would be very comparable with manual gearboxes. The improvement in fuel efficiency would be greater than 18 %, improving on existing automatic gearboxes. These features lend this design to heavy duty applications where productivity, economy and life are of greater importance.

The ultimate realization of a KDS HMIVT embodies an integrated powertrain where the engine and transmission maps are integrated into a unified control strategy where the best operating line, independent of engine rpm and road speed are obtained. Several optimal goals can therefore be realized and prioritized based on the primary goal being fuel economy, emissions or performance/productivity.