Allison EP System: Difference between revisions
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|330 hp (246 kW) | |330 hp (246 kW) | ||
|1050 lb-ft (1420 Nm) | |1050 lb-ft (1420 Nm) | ||
|[[Cummins]] [[Cummins ISL|ISL]] 330 hp (offered by [[New Flyer Industries]] and [[North American Bus Industries]]) <br/> [[Caterpillar]] [[Caterpillar C9|C9]] (formerly offered by [[New Flyer Industries]] and [[North American Bus Industries]], no longer offered as of 2010) | |[[Cummins]] [[Cummins ISL|ISL]] 330 hp (offered by [[New Flyer Industries]] and [[North American Bus Industries]]) <br/> [[Caterpillar]] [[Caterpillar C9|C9]] 330 hp (formerly offered by [[New Flyer Industries]] and [[North American Bus Industries]], no longer offered as of 2010) | ||
|919 lbs (417 kg) | |919 lbs (417 kg) | ||
|} | |} | ||
Revision as of 17:29, 13 May 2010
The Allison EP System is a two-mode compound split parallel hybrid electric system for diesel vehicles. The system is comprised of a a dual pulse interval modulator (DPIM2), Panasonic nickel metal hydride (NiMH) enrgy storage batteries, a control modual, and an electric drive called the EV Drive.
The DPIM2 unit is usually located behind the NiMH batteries on the roof. It converts engery that is transfered between the drive/generator, which uses and produces alternating current (AC), and the batteries, which store direct current (DC). The energy stored in the batteries is produced through the generator connected to the diesel engine and though regenerative braking. Prior to the launch of the 2010 model, the EP System used Allisons DPIM. This was replaced by the current DPIM2 which has more robust internal hardware and enhanced redundancy for greater reliability.
The EV Drive is an infinitly variable transmission in common with the Allison Bus Series. The EV Drive is equipped with planetary gears and clutches and electronic solenods and motor/generator. The gerator/motor acts as variable clutches and controls the the planetary components.
Allsion announced in December 2009, that for 2010, the EP System for buses and coaches will feature new and improved components for greater reliability, durability and performance.[1]The 2010 EP System will use Allison's Fourth Generation Electronic Controls which has greater processing power and memory capability. It also features a revised DPIM, improved enegery storage system (called ESS2), and updated 2010 EV Drive for 2010-compliant engines.
| Type | Max. input tower of EV Drive | Max. input torque of EV Drive | Available Engines | Mass of EV Drive (dry) |
|---|---|---|---|---|
| EP40 System | 280 hp (209 kW) | 910 lb-ft (1235 Nm) | Cummins ISB 280 hp (offered by ElDorado National, Gillig and Nova Bus) Cummins ISL 280 hp (offered by New Flyer Industries and North American Bus Industries) |
919 lbs (417 kg) |
| EP50 System | 330 hp (246 kW) | 1050 lb-ft (1420 Nm) | Cummins ISL 330 hp (offered by New Flyer Industries and North American Bus Industries) Caterpillar C9 330 hp (formerly offered by New Flyer Industries and North American Bus Industries, no longer offered as of 2010) |
919 lbs (417 kg) |
References
- Allison EP System, allsisontransmission.com, retrieved on 2009-10-03
- ↑ 2010 Allison Hybrid EP System, allisontransmission.com, retrieved on 2010-01-29