Volvo 7700 Hybrid Getting there by Hybrid Technology
the green challenge Authorities all over the world set strict environmental boundaries for public transports. Energy use, pollution and global warming are factors influencing all areas of civil planning and development. Public transport is no exception. To us, environmental care, and efficiency in moving people, are challenges but also exciting opportunities. That s why green efficiency is part of everything we do. When Volvo introduced hybrid buses it meant a significant step ahead. In our research and development, new materials, advanced technology and alternative fuels are vital. And, as always with Volvo, we never compromise on reliability, safety and ergonomics. Our customers, the drivers and passengers judge whether our efforts are worthwhile. By doing so, they help us move our goals forward. Through close co operation we are convinced that we re getting there. Getting there, together. A Volvo is more than a bus As a matter of fact there s a lot more to it. We take responsibility, for its function and for your trouble-free ownership, not only for the bus itself. That s why Volvo offers comprehensive solutions that cover all vehicle-related aspects of managing your operation. Volvo workshops are well-equipped and trained to take care of the complete Hybrid vehicles in Gold service contract. You will benefit from increased uptime, improved parts availability, and higher service level in your operation. In combination with a well defined cost, these factors substantially boost reliability, driver productivity, and overall long-term profitability. Financing efficient solutions Simplicity a one-stop-shop. Packaged solutions at a monthly fee. Customer financing through Volvo Financial Services. Reduced fuel consumption and a safer bus. Predictable service and repair cost. Genuine Volvo Service and Genuine Volvo Parts. Service contracts offer (Blue or Gold) Maintenance and repair service contracts. High vehicle availability. Fuel Management Tailor-made for Hybrid bus operations. Eco-driving training. Performance follow up of the bus. read more about our services on www.volvobuses.com Life Cycle/Green Public Procurement Cost (LCC/GPP) LCC/GPP calculation performed for each batch before delivery. Possibility to assist with GPP calculations to meet new EU regulations for public procurement. Follow up of result after buses are taken into operation.
Green efficiency with Volvo 7700 Hybrid real life Benefits City traffic is a tough environment. Repeated stops and accelerations stress driveline and brakes and consume fuel. A European bus uses 50% less energy than the train and 70% less energy than the average car. The Volvo 7700 Hybrid uses 40% less fuel and emits 40% less green house gases than the buses in service in Europe today. Even when compared to the state-of-the-art low floor city bus, the Volvo 7700 Hybrid uses 35% less fuel in the average European city traffic. It makes it by far the most environmentally friendly means of person transports. Add to that lowered noise and reduced engine and brake wear. The Volvo 7700 Hybrid is a real winner. Driving a Volvo 7700 Hybrid is truly a pleasure. A top-class driver s compartment helps the driver stay focused and alert. Massive torque directly from start and a perfectly balanced power steering make the ride smooth. A large number of common parts enhance service and maintenance efficiency throughout the product range. Add to that improved documentation and stocking for customer specific parts, and traceability in aftermarket systems by individual vehicle specifications. For the fleet owner and operator, the Volvo 7700 Hybrid is a profit-maker. Not only because of fuel efficiency but also by the simple and trouble-free service and maintenance routines. Hybrid buses in real life Despite the fact that hybrid technology is relatively new, our vehicles have an impressive track record. The outcome on savings even exceed the expectations of the operators. We have reached an average of 26.7 l/100 km. That s the same amount as for three ordinary cars. The low CO 2 emissions of just 20 grammes per passenger kilometre is 1/5 of that of a hybrid car. We are truly happy and proud. Lars Börje Björfjäll, president of Göteborgs Spårvägar, the community public transport company in Göteborg. Most hybrid buses run in city traffic. But we wanted to find a solution also for intercity operations. Volvo s parallel hybrid seemed to be the right choice. Werner Blatter, member of the management team of PostAuto, Switzerland s leading bus operator. Powerful and intelligent The Volvo 7700 Hybrid uses a parallel hybrid configuration. This means that there is a diesel engine and an electric motor in the driveline. They can run independently or together, and an advanced control system optimises the deployment of the power resources. The start-stop function can switch the diesel engine on and off at bus stops and traffic lights, depending on charging level of the batteries. Starting from a standstill, the bus is electrically powered. A smooth and silent start is provided by the electric motor s high torque already from 0 rpm. When up to speed, approximately 20 km/h, the diesel engine adds its superior pulling power at higher revs, and the two power sources will interact in an optimised way. Reduced energy use and emissions are perhaps the main benefit of a hybrid bus. CO 2 and NOx are cut dramatically. And by the diesel particulate filter (DPF), this goes for particulate emissions as well. One of the reasons is that when the diesel engine is not in use there are no emissions at all. Moreover, the electrical machine enables a smaller diesel engine than a traditional city bus, without decreasing performance. The hybrid solution boosts productivity by the increased passenger capacity. A wide centre aisle, wide doors and a completely flat floor make the Volvo 7700 Hybrid a real people-mover. A kneeling function gives a low boarding height for the up to 95 passengers the Volvo 7700 Hybrid can carry. Already from the start we could see savings of 35 % in city traffic, and close to 25 % in intercity traffic, compared to our estimate of 20 %. Dominik Steiner, owner of Steinerbus AG, sub-contractor of PostAuto.
facts and figures Length: 12.0 m Height: 3.2 m Width: 2.55 m Wheelbase: 5.95 m Gross vehicle weight: 18,000 kg Suspension: Air suspension Steering: Electric power steering Air compressor: Electric rotary compressor Brakes: EBS disc brakes Number of doors: 2 or 3 Lowest boarding height: 250 mm Maximum number of passengers: 95 Hybrid system: Volvo I-SAM parallel hybrid direct drive axle Diesel engine: Volvo D5F Diesel engine output: 215 bhp/800 Nm Electric motor output: 160 bhp/800 Nm Transmission: Volvo I-Shift automatic gearchanging system find more facts on www.volvobuses.com hybrid the volvo way Batteries Temperature controlled lithium-ion batteries provide efficient energy storage. Temperature control includes both cooling and heating. Transmission The highly efficient 12-speed Volvo I-Shift transmission is ideal for a hybrid solution. The I-Shift software interacts with the hybrid system in order to optimise performance and efficiency for city traffic. Electric motor/generator The I-SAM (Integrated Starter Alternator Motor) electrical motor has a power output corresponding to 160 bhp and a torque of 800 Nm. When braking, the motor serves as a generator and charges the batteries. Powertrain management unit (PMU) This unit controls battery charging, engagement and disengagement of the two power sources and gearchanging mode. Energy converter Provides DC/DC conversion 600 V/24 V. Diesel engine The fuel efficient Volvo D5E is a fourcylinder, 5-litre diesel engine with an output power of 210 bhp. Low emissions characteristics are further enhanced by the closed diesel particulate filter (DPF), that reduces particulate matters by an additional 80%. Electrified auxiliaries The energy recuperated by braking is to some extent used to drive the auxiliary components such as air compressor, air climate control and steering servo more efficiently than possible by conventional drives. Torque Electric motor and diesel engine Diesel engine Electric motor 3200 3435 5945 2664 3135 7 2550 The main components of the Volvo hybrid system 1. Diesel engine 2. Electric motor/generator 3. Transmission 4. Powertrain Management Unit (PMU) 5. Energy converter DC/DC 600V/24V 6. Batteries 7. Electrified auxiliaries 3 6 4 2 5 1 rpm The diesel engine starts when the electric motor has brought the bus up to speed. The two power sources then work in tandem, with the electric motor s impressive low-rev properties adding to the diesel engine s superior pulling power at higher revs. 12044
volvo buses RSP 83962.10.09 EN. Printed in Sweden. Equipment that is shown or mentioned in the brochure may be optional or available as an accessory and may vary from one country to another. We retain the right to alter product specifications without prior notification.