Volvo 7900 Plug-In Hybrid Bus - drivetrain

Volvo 7900 Plug-In Hybrid Bus - drivetrain

Volvo Buses released a lot of details on its new 7900 plug-in hybrid bus, which will debut at the International IAA Commercial Vehicles show.

This extraordinary vehicle is designed to operate most of the time in all-electric mode, which could reduce fuel consumption and carbon dioxide by up to 75%, and total energy consumption is reduced by 60% compared to a conventional diesel bus.

It will be propelled by a 150 kW electric motor with 1,200 Nm of peak torque combined with 240 hp/918 Nm Volvo D5K 240, 4-cylinder, in-line diesel engine with common rail injection.

For energy storage, Volvo uses a 19 kWh lithium-ion battery pack equipped with a heater/cooler system. This could be enough capacity for 10 km and, on average, 70% of the distance between charging stations.

Volvo 7900 Plug-In Hybrid Bus - drivetrain

Volvo 7900 Plug-In Hybrid Bus - drivetrain

Volvo 7900 Plug-In Hybrid Bus

Volvo 7900 Plug-In Hybrid Bus

Volvo Buses believes in using a rapid charging system many times a day at bus stops. A new special roof system was presented, which will be able to fully charge the 19 kWh battery pack in roughly 6 minutes.

The Opportunity Charging System can provide up to 400 A at 750 V, which is some 300 kW.  However, the plug-in hybrid bus will accept just half of this.

There is no range problem as the Volvo 7900 plug-in hybrid can operate in regular hybrid mode too.

Håkan Agnevall, President Volvo Bus Corporation stated:

“I am very proud to launch this ground-breaking bus system. Electric-hybrid buses and full-electric buses are tomorrow’s solution for urban public transport. They will allow us to reduce energy consumption, air pollution, climate impact and noise, which are some of the biggest challenges facing large cities worldwide."

One of the benefits of plug-in hybrid buses is the noise level reduction.

Several cities already ordered the new Volvo 7900 plug-in buses.  However, series production isn't scheduled to begin until 2016.

Specification:

Length 12 m
Width 2.55 m
Height 3.28 m
Permitted GVW 19,000 kg
Emissions standard Euro 6
Diesel engine 240 hp/918 Nm Volvo D5K 240, 4-cylinder, in-line diesel engine with common rail injection
Electric motor 150 kW/1200 Nm Volvo I-SAM
Energy storage system High-capacity lithium-ion battery
Transmission Volvo I-Shift automated gear-changing system
Charging system Opportunity Charging. Fully automatic fast charging sequence. Rapid charge time: up to 6 min.
Suspension Electronically controlled air suspension with kneeling function
Passenger capacity Up to 95 persons, 32 + 1 (folding) seats
Door system Electric. 2+2+0 or 2+2+2.
Climate system 28 kW AC with separate climate zones for driver and passengers
Volvo 7900 Plug-In Hybrid Bus

Volvo 7900 Plug-In Hybrid Bus

Volvo 7900 Plug-In Hybrid Bus

Volvo 7900 Plug-In Hybrid Bus

*Editor's Note: We strongly suggest that Volvo reproduces "The Epic Split" featuring this new 7900 plug-in hybrid bus.