Steve Justice
Allison Transmission
Hybrid Benefits
Regenerative Braking
1.
When stopping the vehicle,
Allison Electric Drive
automatically becomes an
energy generator by
converting vehicle energy
into electrical energy.
2.
The electrical energy is
then saved, by storing it
in the Allison Energy
Storage System for
future use.
Stores the
Energy
3.
When accelerating
the vehicle, the stored
electrical energy is used to
accelerate the vehicle,
saving fuel and reducing
harmful emissions and noise,
while improving comfort.
Hybrid Architectures - EVT
An EVT hybrid system incorporates a smaller version
of the Series Hybrid
Configuration
Power
Electronics
ECU
Engine
Drive Unit
for
The Real Invention!
Allison Energy Storage System
Dual Power Inverter Module (DPIM)
System Controllers
• Allison Transmission 1000/2000/2400
Series™ controller
– As used in 2003 Silverado
pickup truck
• Very high quality
• Automotive volumes
• Two used with
• Mass: 5.1 lb (2.3 kg)
P
TM
E System
EP 40/50
Scalability
EP 8
2007 Tahoe
2007 Yukon
2008 Silverado
Parallel Hybrid Electric Ford E450 Cutaway and Strip Chassis
Series Hybrid Electric Azure CitiBus
Thomas Built develops hybrid bus
Thomas Built Buses has developed and begun
evaluating a prototype of a hybrid Saf-T-Liner
C2 school bus.
The prototype is powered by a Mercedes-Benz
diesel engine, an Eaton Corp. transmission
and an electric motor. It was developed jointly
by Thomas Built, Eaton and Freightliner
Custom Chassis Corp.
IC Corporation, North America’s largest school bus manufacturer, unveiled
the nation’s first hybrid school bus today at the New York Association of
Pupil Transportation (NYAPT) Show.
The company, a subsidiary of Navistar International Corporation, has
partnered with Enova Systems to develop the hybrid, which can deliver
about a 40% increase in fuel economy.
The initial powertrain for the hybrid school bus will couple an International
VT365 V8 diesel engine with a post-transmission 80 kW Hybrid Drive
System, incorporating a transmission, batteries and an electric motor. The
system is based on a parallel architecture.
The company will offer two battery systems—NiMH and PbA—as well as a
plug-in configuration that uses an NiMH battery pack. (More information to
come.)
Post Transmission Parallel Hybrid
The Post Transmission Parallel Hybrid System locates the electric motor between the
transmission and rear axle. Both the electric motor and the existing vehicle s engine
operate simultaneously to drive the wheels during acceleration. As the vehicle slows,
during braking, the electric motor functions as a generator to recharge the batteries. The
Hybrid subsystems are designed to be installed as a "drop in," fully integrated turnkey
fashion into an OEM production line, or retrofitted into an existing vehicle. The system
requires little to no modifications to chassis, body, Instrument Panel, etc. The system
does not intrude on, or require any alteration to the Engine Control/Communication
system, thus avoiding any emissions certification issues. Additionally the Hybrid system
does not need to be operational in order for the vehicle to be driven. If, for any reason,
the Hybrid system is not working, the vehicle will operate without limitation.
The Volvo FM Hybrid Concept
The Volvo Group is a leader in hybrid drives for heavy vehicles such as trucks and
buses and in March 2006 presented a unique hybrid solution that has great potential of
becoming commercially viable. Volvo's solution was named based on its functionality, ISAM - Integrated Starter Alternator Motor, and can provide fuel savings of up to
35% depending on application area and driving conditions. The first vehicles are
expected to enter production in 2009. The Group is also developing hybrid technology
for construction equipment, such as wheel loaders, in which the fuel savings can be up
to 50%.
"The issue of climate changes and uncertainty regarding the supply and pricing of oil
makes hybrid drive an extremely attractive technology for our customers," says Volvo
CEO Leif Johansson. "With our solution, we can offer technology that saves fuel and the
environment and, consequently, can be good business for society and our customers."
January 11, 2007
Electric Motor
Thank You