Swiss city takes hybrid refuse trucks with Allison Automatics
3rd September 2020
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Three new MAN TGS hybrid refuse vehicles join the fleet of Thun in Switzerland; trucks feature the latest Euro 6d engines with Allison’s 4000 SeriesTM transmissions and have fully electric refuse collection bodies.

The Civil Engineering Department of the Swiss city of Thun has added three new three-axle MAN TGS chassis to its waste collection fleet. The trucks, which went into service in August 2020, are MAN TGS 26.430 6×2-4 with steered trailing axle and fully electric Medium XLS onboard refuse compaction system by Stummer. They are powered by the brand new MAN D26 Euro 6d engine with 12.4 litre displacement and 316 kW, coupled with Allison’s 4000 SeriesTM transmission with a retarder.

The city of Thun was looking for vehicles that combine the smooth and jolt-free starting performance of fully electric trucks with the reliability and economy of diesel vehicles. According to Toni Zimmermann, Head of Procurement and Safety for the City of Thun, this vehicle configuration of Euro 6d engine, together with Allison fully automatic transmission and electric refuse body, is currently unique.

“We previously had vehicles with automated manual transmissions (AMT), but this did not quite meet our expectations. The jolting during stop-and-go operation is an enormous strain for our drivers, but especially for the loading crew at the rear of the vehicle. We wanted to use fully automatic transmissions to come as close as possible to achieving the same smooth running of transmissions as in electric vehicles,” said Zimmermann. “There is no jolting of gears in electric vehicles and this is a huge advantage for our employees working on the vehicles, as well as for the driver.”

The 26-ton rear loaders, operated by three people – one driver and two loading crew – collect rubbish from around 21,000 households in Thun. Alternating between collecting household waste, bulky goods, paper/cardboard and green waste, they cover some 9,320 miles a year and operate around 1,500 hours.

Thun considers itself a pioneer in the field of innovative, environmentally-friendly vehicles, and strives to stay one-step ahead in terms of technology. One example is the fully electric Futuricum refuse vehicle on a Volvo chassis, which has been operating successfully in Thun since 2018. The high procurement cost and the relatively short experience with this vehicle prompted the city to take the intermediate step of a hybrid system.

The Allison 4000 Series TM, with its patented torque converter and continuous power shifting, provides the perfect features required for the city’s challenging topography and its 600 metre altitude difference. The torque converter smoothly multiplies engine torque delivering more power to the wheels to improve vehicle start-up and enable more responsive acceleration. Furthermore, it protects the entire powertrain from vibrations and jolts during gear shifting. The precise crawling speed and precision tuning facilitate the collection of garbage bins in narrow alleyways, as well as working at extremely low speeds. Allison fully automatic transmissions provide seamless, uninterrupted power for increased average speed, higher productivity and driving comfort – even on steep inclines such as in the city of Thun.

“The smooth, jolt-free vehicle startability of the Allison transmission torque converter is highly beneficial to the employees on the running boards – the so-called loaders. Moreover, the drivers are fully satisfied with Allison’s fully automatic transmission due to the excellent driving comfort,” said Zimmermann.

To ensure that the lithium iron phosphate batteries operating the compaction system are fully charged every morning, the MAN TGS are hooked up to the charging station at night and the refuse collection body is recharged. The additional weight of the battery packs and accessories is approximately 1,020 kilograms. The charging capacity is 54 kWh and the effective working life of the battery is around 2,000 charging cycles.

In the event of an emergency, the vehicles have a second pump so that the body functions can be operated via the power take-off of the Allison transmission.

Alongside the most advanced safety features, the vehicles also offer a number of Swiss in-house developments that are very practical in wintery conditions on ice and snow:

  • A heating system was installed to heat the handles for the loading crew at the rear of the refuse vehicle.
  • A drawer above the exhaust has been designed as a dryer for wet gloves. This is heated by the warmth of the exhaust.

Furthermore, the new refuse collection vehicles of the city of Thun are equipped with a suction device at the rear of the vehicle. This “Clean-Option” feature offered by bodybuilder Stummer Kommunalfahrzeuge, protects loading personnel and residents from exposure to bioaerosols (dust, mold, viruses, bacteria) that can occur in varying concentrations in all types of waste, thus reducing the risk of eye irritation and respiratory diseases.

“Today’s modern vehicles must also be good workplaces for employees. I believe we have made an excellent choice with the new vehicles,” said Zimmermann.

Technical Specifications: MAN TGS 26.430, 6×2-4 LL with Allison 4000 SeriesTM fully automatic transmission and Stummer E-Power Rear Loader Body Medium XLS

End user City of Thun, Switzerland
Chassis (manufacturer) MAN TGS 26.430 6×2-4 LL
Engine model MAN D26, 12,4 l Displacement
Engine power 316 kW
Torque max. torque 2200 NM starting at 930 rpm
Exhaust emission standard Euro 6 d
Transmission Allison Transmission 4000 Series™
Wheelbase 3,500 mm
Total Weight 26 ton
Bodyworks (Manufacturer and model) Stummer rear loader. Fully electric refuse compaction system, Medium XLS, E-Power, total capacity 17.6 cubic metre

Image / Image – © Rolf Eicher, Stadt Thun. Presentation of the three new hybrid refuse trucks for the refuse collection fleet of the Swiss city of Thun on August 14, 2020. The new three-axle MAN TGS chassis 26.430 6×2-4 with steered trailing axle and refuse compaction system Medium XLS by Stummer, are powered by the brand new Euro 6d engine with 12.4 litre displacement and 316 kW, coupled with Allison’s 4000 SeriesTM transmission with a retarder.

Image – © Rolf Eicher, Stadt Thun. The vehicles are powered by Euro 6d diesel engines with Allison fully automatic transmissions, with the refuse collection body by Stummer working with full electric power.

Image – © Rolf Eicher, Stadt Thun. “We wanted to use fully automatic transmissions to come as close as possible to achieving the same smooth running of transmissions as in electric vehicles,” said Toni Zimmermann, Head of Procurement and Safety for the City of Thun. “There is no jolting of gears in electric vehicles and this is a huge advantage for our employees working on the vehicles, as well as for the driver.”

Image – © Allison Transmission. The Allison 4000 Series™ with its patented torque converter and continuous power shifting provides the perfect features required for the city of Thun’s challenging topography and its 600 meter altitude difference. Allison 4000 Series™ fully automatic transmission can optionally be factory-installed in the MAN TGS chassis.

Image – © Stefan Neumayer, Stummer Kommunalfahrzeuge. Assembly of the vehicles at Stummer Kommunalfahrzeuge in Bischofshofen, Austria.The new refuse collection vehicles of the city of Thun are equipped with a suction device at the rear of the vehicle. This “Clean-Option” feature offered by Stummer, the bodybuilder, protects loading personnel and residents from exposure to bioaerosols (dust, mold, viruses, bacteria) which can occur in varying concentrations in all types of waste, thus reducing the risk of eye irritation and respiratory diseases.

Image – © Stefan Neumayer, Stummer Kommunalfahrzeuge. Assembly of the vehicles at Stummer Kommunalfahrzeuge in Bischofshofen, Austria.

Image – © Stefan Neumayer, Stummer Kommunalfahrzeuge. The vehicles are powered by Euro 6d diesel engines with Allison fully automatic transmissions, but the refuse collection body by Stummer is working fully electric.

About Allison Transmission

Allison Transmission (NYSE: ALSN) is the world’s largest manufacturer of fully automatic transmissions for medium- and heavy-duty commercial vehicles and medium- and heavy-tactical U.S. defense vehicles, as well as a supplier of commercial vehicle propulsion solutions, including electric hybrid and fully electric propulsion systems. Allison products are used in a wide variety of applications, including on-highway trucks (distribution, refuse, construction, fire and emergency), buses (school, transit and coach), motorhomes, off-highway vehicles and equipment (energy, mining and construction applications) and defense vehicles (wheeled and tracked). Founded in 1915, the company is headquartered in Indianapolis, Indiana, USA. With a market presence in more than 80 countries, Allison has regional headquarters in the Netherlands, China and Brazil with manufacturing facilities in the U.S., Hungary and India. Allison also has approximately 1,500 independent distributor and dealer locations worldwide. For more information, visit allisontransmission.com.

About the City of Thun

Thun is the eleventh largest city in Switzerland with a population of approx. 44,000. It is located in the canton of Bern. The city of Thun successfully combines mountains and lakes with historical and contemporary buildings. The historic part of the city, which was mostly built in the 12th century, impresses with its elevated sidewalks, which invite to shopping, and the unmistakable Thun Castle. For more information, visit www.thun.ch.

About Stummer Kommunalfahrzeuge

For the past 40 years, Stummer Kommunalfahrzeuge has specialised in solutions and technologies for low-dust, low-odour and noise-reduced waste disposal and has been manufacturing systems for refuse collection vehicles, skip loaders, hook lifts and specialty vehicles. The company is based in Bischofshofen, Austria and is part of the Zoeller-Group. It offers the best suitable refuse collection systems for every application, with volumes ranging from 7 cubic meter to 30 cubic meter.

For more information, visit www.stummer.net or www.contena-ochsner.ch