The world`s most efficient transmission doesn`t cost the earth

The world’s most
efficient transmission
doesn’t cost the earth
The world’s fastest Automated
Manual Transmission (AMT)
with seamless shifts
Automated Manual Transmissions (AMT) suffered from
poor shift quality until Zeroshift Limited developed its new
replacement for synchromesh. The Zeroshift system provides
smoother shifts, improved acceleration and reduced emissions.
Existing manual gearbox plants are easily converted to
Zeroshift. The basic manual gearbox architecture and the
Zeroshift technology is a seamless,
instantaneous means of changing
gear ratios without interrupting the
torque to the driveline. It is less
expensive than both continuously
variable transmissions (CVT) and
dual clutch transmissions (DCT)
0 km/hr
single clutch are both retained. The Zeroshift mechanism is
compact enough to replace a synchromesh pack even in small
cars and motorcycles.
Acceleration, efficiency, size and weight of Zeroshift all
compare favourably to the best automatic transmission
systems while shift quality is either matched or exceeded.
The technology is applicable to all passenger cars, trucks,
motorcycles, motorsport vehicles and off highway equipment.
Lower fuel consumption
+ reduced CO2 emissions
Saves fuel...
On a typical drive cycle, the Zeroshift AMT demonstrates a marked
improvement in fuel economy over a manual. During a conventional
power, this is not required with Zeroshift.
Reduces emissions...
Performance
gearshift there is increased fuelling during re-engagement of the
Zeroshift
Manual
This decreased fuelling requirement with Zeroshift results in less
harmful emissions to the environment. No fuel is wasted whilst changing
gear as there is no time when the engine is not driving the wheels.
Automatic
Economy
The fundamentals
of Zeroshift
Essentially Zeroshift is a
simple torque hand-over
from one gear to another,
governed electronically by a
low force automated system
Two drive rings with alternating faces share a common
Zeroshift
hub and allow drive in one or the other direction; one ring
Acceleration
takes up drive, the other eliminates the backlash that is
common in dog shift transmissions.
When conducting a Zeroshift, the unloaded ring is
Velocity
Velocity
From 1st gear
into 2nd gear
Acceleration
moved with considerably less force to that of existing
transmissions. Engine synchronization is conditioned by
a control system to ensure a seamless torque transition.
Manual
1st gear
disengaged
Note: No sudden change in ‘G’ no loss,
in velocity – an instant smooth shift
2nd gear
engaged
Time
Automatic
Dual Clutch
Automated Manual
Note: ‘G’ drop prior
and during shift
Note: Velocity
curve through shift
Time
50 km/hr
Time
Note: Reduction in
velocity gradient
during shift
Time
Time
Acceleration
Better shift quality
MANUAL
Time
Even with the industry’s most advanced gear systems it is
possible to still feel the shifts. Our tests have shown that
Zeroshift is smoother than a six-speed auto on the market today.
With constant torque providing acceleration, as well as
smoother changes, the vehicle is more stable and benefits
from higher levels of control, allowing gear changes while
cornering as well as improving pulling power.
Integrating Zeroshift
into your company is also
a seamless transition
Replacing the synchromesh
eliminates components with minimal
disruption to the production line
The Zeroshift mechanism fits in existing package envelope
Our team of expert engineers will help convert existing
and unlike alternative systems, the Zeroshift mechanism
driveline systems and bespoke designs from prototype to
can be assembled in existing factories.
production and be there at every step to assist.
System overview
CAN bus
ECU
Clutch
100 km/hr
TCU
Zeroshift
Because of its enhanced performance, Zeroshift allows
vehicle manufacturers to downsize their powertrains,
Velocity
Better performance
allowing, for example, a 1.2-litre engine to enjoy the same
performance as a 1.4-litre engine.
This is achieved due to the complete removal of shift time
normally associated with a synchromesh manual.
MANUAL
In a drag race, a 2005 Mustang fitted with Zeroshift gained
over 5 car lengths over an otherwise identical manual car.
Time
For more information
contact our sales team at:
Zeroshift Ltd.
Davy Avenue, Knowlhill.
Milton Keynes MK5 8PB
United Kingdom
T:
F:
E:
W:
+44 (0) 1908 303 000
+44 (0) 1908 671 282
[email protected]
www.zeroshift.com
Contact our local representative: