Allison Electric Drives EP System - Gary Stadler

1 Leaders in advanced hybrid Drives AllisonElectric Drives leaders in advanced hybrid technologyAllison Transmission is a division of General Motors Corporation. Allison Electric Drives is a trademark of General Motors Corporation. Information or specifications subject to change withoutnotice or obligation. Emissions, fuel economy and other performance claims are dependent on customer defined requirements and driving cycle. Adjustments to one variable ( accelerationperformance) may adversely impact another ( fuel economy).

2 SA3592EN (2002/08) Litho in OF CONTENTS1 Introduction2 EPSystem Components4 Applications6 Architecture and Benefits8 Operation and Product SupportThe Allison right the right we study our global need to reduce our dependency on fossil fuelsand strive to improve our air quality, Allison Electric Drives is proud tobring a new product to the bus market with practical technology that provides tangible advancement and operating Allison Electric Drives EPhybrid propulsion System bridges the gap between traditional mechanical engine propulsion systems and zero-emission technologies.

3 The EPSystem can significantly lower vehicle emissions and improvefuel economy, while increasing bus acceleration and brake life. It is our collective responsibility to make the earth a better placethan we came into it. The Allison Hybrid Electric Drives EPSystem exemplifies our efforts to preserve and improve the quality of our environment for future Power Electronics DPIMH ybridControlModuleEV40 drive EngineRANGE SELECTORThe range selector is identical to the electronically controlled Allison Automatic range selector. The driverpushes D for Forward or R for Reverse.

4 The secret to the Allison Electric Drives EPSystem lies in its simplicity. The System consists of six components:EVDrive unit, DPIM, Energy Storage Unit, two SystemControllers and a Range components are designed to fit in virtually the same space claim as a conventional compact package easily installs in low- and high-floor bus following describes each component and its Allison EVDrive appears similar to the Allison Transmission B Series and is equipped with: Planetary gears and clutches Electronic solenoids and valves Two motors/generatorsAll components work together to create two continuously variable operating Electric motor/generators act as variable clutches to accelerate, slow or hold planetary EVDrive is truly an infinitely variable transmission with respect to torque and speed.

5 It is a vehicle designer s dream come POWERINVERTER MODULE (DPIM)The Dual PowerInverter Module converts electricalenergy into alternating currentor direct EVDrivemotor/generators use and produce alternating Energy StorageUnit can only storedirect current. The DPIM convertselectrical energy for easy transfer, storage and CONTROLLERSThe EPSystem uses two SystemControllers (Hybrid Control Modules).The System Controllers act like the brain, processing information fromsystem components and driver System Controllers provide systemcommand and control for precisevehicle propulsion and energyproduction.

6 They include diagnosticand reprogramming STORAGE UNITE nergy Storage Units supply electrical energy to the EVDrive s Electric motors. Units vary indesign and size per vehicle type and electrical energy is created during normal motor/generator operation and duringregenerative braking. Energy Storage lessens thedemands on the clean diesel, thereby reducingemissions, fuel consumption and ComponentsEnergyStorageHybridControlModu le45 The Allison EPSystem can significantly enhance the performance of transit,suburban coaches and articulated buses operating in a variety of environments whether it be stop-and-go city traffic, over the road or a combination of the AND ARTICULATED BUSI magine standing at a bus stop and not smelling the pungent exhaust fumes of atransit bus as it accelerates from the curb.

7 Imagine not hearing the familiar roarof the engine as the bus merges into s possible with the Allison EPSystem. The Allison EPSystem reduces emissions up to 90% as compared to conventional diesel-fueled buses, and it spractically silent when operating on pure electrical Allison EPSystem is much more efficient and economical to operate than alternative fuel assured, you won t sacrifice passenger comfort for fuel economy or reduced emissions; the Allison EPSystem provides a remarkably smooth COACHOut on the open highway, the Allison EPSystem accelerates with ease, to mergeinto traffic and then maintain appropriate road speed.

8 With no sacrifice to fact, a bus equipped with the EPSystem and a smaller horsepower enginecan out-accelerate a comparable bus equipped with a larger conventional engineand transmission propulsion System . And consume less fuel in the process. Theblend of mechanical and electrical power provides seamless acceleration. Whilesignificantly reducing ride is quiet, smooth and quite comfortable. Regardless of road what your passengers EFFICIENT USE OF POWERA few years ago, powering a 20-ton bus with a diesel engine designed for athree-ton pickup truck would have seemed impossible.

9 With the EPSystem, it ssimply a matter of making the best use of available buses need the very high efficiencies demonstrated in the , Suburban Coach and Articulated BusesThe two electrical motors combined with a very efficient mechanicalpath and energy storage allow efficient stop-and-go application as well as effective highway performance. The entire System is controlled by very developed energy management OPERATIONE lectricalENGINEGEARINGGEARINGGENERATORMO TORGENERATORMOTORENERGYSTORAGEFINAL DRIVEA rchitecture and BenefitsThe Allison EPSystem provides significant emission reductions, as compared to alternative propulsion low speeds, acceleration is more efficientlyachieved through the Electric motors,but as road speedincreases, the EVDrive blends the Electric powerwith mechanicalpower.

10 Higher roadspeeds are achievedthrough puremechanical ELECTRICPARALLEL MIXPURE MECHANICALM echanical67 The Allison parallel System has two paths: a pure mechanical path and pure electrical path to achievethe highest energy efficiency for transit and coach Allison EPSystem is very easy to integrate. It has roughly the same footprint as your currentAllison Automatic. There are no expensive fueling stations to purchase and maintain, so there is verylittle alteration to your existing fleet ECONOMYThe Allison EPSystem provides up to a 60% improvement in fuel ACCELERATIONAn Allison Hybrid Electric Drives EPSystem can significantly out-accelerate a vehicle equipped with a conventional drivetrain.