Allison’s Hybrid System Gains Recognition in Bus Transport
Suffolk County Transit, provider of bus services in Suffolk County (New York), has recently reported that more than two dozen of company’s buses will be equipped with Allison Transmission’s hybrid transmission system. Allison has been successfully providing its hybrid solution H 40 EPTM for Transit buses for almost a decade. This solution ensures great operational characteristics and enhanced durability.
In terms of acceleration characteristics, a bus equipped with the Allison hybrid unit considerably outperforms a similar bus equipped with a standard powertrain. With the Allison Hybrid EP, the speed-up is performed in more efficient manner. In reality, customers give preference to buses equipped with the Allison hybrid unit, as this solution makes bus rides much more comfortable.
The design
of this hybrid system includes the following:
- automatic gearbox;
- 2 hybrid motor-generators;
- high-power electronics;
- battery regulation unit.
The H 40 EPTM
unit also guarantees smooth transmission of power to the wheels and comes
equipped with Allison’s most advanced electronic control features which
increase the effectiveness and operating rate of the complete unit.
H 40 EPTM drive unit
The most
notable advantages of the Allison hybrid technology are the following:
- Design benefits. Thanks to the combination of electrical and mechanical parts, this technology guarantees optimized operating characteristics and fuel efficiency;
- Reduction in fuel consumption and CO2 emissions. In comparison to standard buses, the improvement in fuel consumption reaches up to 25%. The Allison hybrid unit has a built-in distribution platform which transmits power from the hybrid unit to the auxiliary components (such as air conditioner) of the vehicle, thereby ensuring better fuel economy;
- Regenerative braking. When the bus slows down or stops completely, the system converts its kinetic energy to stored electric energy. In fact, the motor turns out to be a generating unit. When it comes to acceleration, the accumulated braking energy will be applied.
- Improved noise reduction. In contrast with standard buses, the Allison E-hybrid unit ensures decreased acoustic pollution. Allison also has a special hush mode, allowing buses to run with enhanced or maximum noise reduction for specified quiet zones.
Allison representatives expressed their satisfaction at strengthening cooperation with Suffolk County Transit. Allison’s hybrid system complies with the highest standards and manifests itself as a great solution for interurban buses. Allison has started providing its solutions in the field of hybrid propulsion units 16 years ago. Currently, Allison's hybrid solutions are mainly intended for transit buses. More than eight thousand Allison E-hybrid units have been sold across the globe.
