DISTRIBUTION STATEMENT A - Approved for public release – UNCLASSIFIED 2017 NDIA GROUND VEHICLE SYSTEMS ENGINEERING AND TECHNOLOGY
SYMPOSIUM
POWER & MOBILITY (P&M ) TECHNICAL SESSION
AUGUST 8-10, 2017 - NOVI, MICHIGAN
KER -TRAIN HIGH EFFICIENCY DRIVE -BY-WIRE
TRANSMISSION SYSTEMS
Mike Brown
Brent Marquardt
Ker-Train Research Inc.
Kingston, Ontario
Disclaimer: Reference here in to any specific commercial company, product, process, or service by trade name,
trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or
favoring by the United States Government or the Department of the Army (DoA). The opinions of the authors expressed
herein do not necessarily state or reflect those of the United States Government or the DoA, and shall not be used for
advertising or pr oduct endorsement purposes.
ABSTRACT
Ker-Train Research Inc. has designed and manufactured a 32 -speed tracked -
vehicle transmission and an 8-speed efficient power take -off fan drive that have been shown
through testing to not only increase vehicle performa nce and overall system efficiency, but
also have the ability to be controlled fully drive -by-wire making them excellent ca ndidates
for integration into autonomous vehicle s.
INTRODUCTION
Ker-Train Research Inc. (KTR) is a company founded
on unique drive train technologies and non -conventional
design approaches. Unrivaled packaging is achieved in
KTR’s transmissions using patented high power density
addendum contact coplanar gearing, high efficiency
PolyCone clutches, compact one -to-one torque
couplings, and fully geared steering differentials. In
recent years, KTR has succeeded in developing
transmission systems with the aforementioned patented
technol ogy that meet the ongoing demand of
autonomous functionality. The Gemini III and the
Efficient Power Take -Off (EPTO) fan drive are two
such transmission systems that can be controlled fully
by drive -by-wire and therefore, easily integrated into a
complete ly autonomous vehicle .
The Gemini III is a 32 -speed 900hp binary logic
transmission that is currently being considered as a
replacement solution for transmissions in existing 40 -50
ton tracked vehicle platforms. With a calculated
efficiency of greater than 90%, the Gemini III will
increase vehicle performance by providing more power to the sprockets while bettering fuel economy at the
same time, thus improving vehicle range and tactical
and logistical abilities. KTR has designed a nd
manufactured two first generation “Alpha” units for the
U.S. Army Tank Automotive Research, Development
and Engineering Center (TARDEC) that are currently
awaiting dyno testing at the TARDEC facility. KTR is
also in the process of designing, manufactur ing and
testing a second generation “Beta” unit with the main
focus being long -term durability, efficiency
optimization of subsystems, weight reductions, design
to cost (DTC) studies, vehicle control software and
hardware developments and the transmission’ s
adaptability into a fully drive -by-wire system.
The Efficient Power Take -Off (EPTO) fan drive is an
extremely compact 8 -speed 150hp binary logic
transmission that was designed as a drop -in replacement
for the existing baseline production PTO fan drive in the
Bradley Fighting Vehicle (BFV) which currently uses a
hydraulic fluid coupling to drive the fan. The EPTO 8 -
speed fan drive has progressed through multiple phases
of development over a five year period and in total, 13 Proceeding s of the 2017 Ground Vehicle Systems Engineering and Technology Symposium (GVSETS)
DISTRIBUTION STATEMENT A - Approved for public release – UNCLASSIFIED
Page 2 of 7 prototype units have been manufactured ( 4 different
variants) and tested at the component and vehicle level
with the latest variant having successfully completed a
400 hour durability test as well as ot
P&M2017_Ker-Train High Efficiency Drive-By-Wire Transmission Systems
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