Cummins European designed and manufactured B & L Series engines can be found powering buses in city fleets located far beyond Europe, in applications ranging from compact midi-buses to 3-axle double-deckers. Many thousands of our B & L Series engines meet Euro V or Euro VI equivalent regulations in countries including Australia, China, Mexico, New Zealand, Singapore and UAE. Indeed, Cummins has become the low emissions engine of choice wherever the bus duty-cycle is the most demanding, the climate condition are the most challenging or where fleet uptime goals are the highest. Backed-up by the broadest global service support network in the industry, we work closely with European OEM exporters as well as locally-based bus builders to ensure they succeed.

You can see our global power hard at work in this Hong Kong bus video, with over 4,500 Cummins-powered double-deckers helping to keep the city on the move. Very few major cities present such a challenging duty-cycle as Hong Kong and with our L Series achieving such a leading position in the franchised bus fleets, this video demonstrates just how capable the 8.9-litre engine is by working up to 20 hours a day on not just congested city streets, but also hilly rural routes and high speed expresses accumulating up to 200,000 km per year. Along with the impressive bus fleets, you can also see some great views of the city.

Cummins has earned an unrivalled position as the world’s leading engine platform for city bus applications, ranging from compact midi-buses all the way up to 3-axle double-deckers and articulated buses. Indeed, no other engines power more buses, in more cities, and in more countries worldwide than Cummins - and that’s because no other engine range can offer such high levels of performance and in-service reliability whilst operating under the most challenging duty cycles. The ability to keep delivering under long service hours, very high annual mileages and difficult route terrain comes as standard with every Cummins engine. Innovations such as the Stop/Start system and hybrid configurations have set Cummins technology apart from others.

For applications in Europe and Turkey our engines are certified to the very low emission requirements of the 2019 Euro VI Phase-D standard, introducing nearer-to-zero diesel and natural gas power. Our European engine manufacturing takes place at the Darlington Plant in the UK, co-located with major facilities focused on engine development, application engineering and pilot vehicle installation. So when it comes to powering buses in Europe and for export worldwide, no other engine company has access to more resources, experience or capability. That’s why Cummins-powered buses can be found operating from Belfast to Berlin, and from Stockholm to Istanbul – or exported to work in cities from Mexico City to Hong Kong.

Istanbul on the move with Cummins

Istanbul, one of the world’s great cities with 15 million people and home to over 5,000 buses powered by Cummins working for the iETT transport network and shuttle services. Clean, reliable and fuel-efficient, the buses are built in Turkey featuring engines from our Darlington, UK plant. See how they help keep the city on the move and connect the European and Asian sides of the city together in this video.

London is a city always on the move with 6,000 Cummins-powered buses

London, a global city that’s always on the move with a bus network providing 6 million passenger journeys every day. A network that Cummins is proud to be a part of, powering over two-thirds of the fleet with Euro 6 clean diesels helping to improve air quality and lower the carbon footprint, aligned with the Ultra Low Emission Zone (ULEZ).

And, you can be sure, wherever there is a Cummins-powered bus, there is a Cummins service team ready to provide expert technical support. From providing proactive maintenance plans to training-up depot staff or working with operators to minimise fuel consumption, this is all part of Cummins’ commitment to support our customers. Always On.

Cummins Euro VI Phase-D power for coach applications spans one of the broadest in the industry, extending from a mini-coach to full size 3-axle touring coach and includes the latest ultra-clean hybrid and natural gas solutions. Specific coach engine ratings release the full potential of the Cummins 2.8-litre to 12-litre engines for shuttle services, day touring, intercity and commuter routes, as well as premium long distance touring.

The same attributes that have established the B6.7 as the leading mid-range engine for city buses have proved equally applicable to the growing market for midi-sized coaches, with less than 11 metre length and with up to 40 seats capacity. The exceptional power density of the 6.7-litre makes it the engine of choice for this highly cost-effective coach class. Fuel and CO₂ reductions are even more impressive with a new generation of coaches with up to 13 metre length utilising Cummins B6.7-H hybrid engine. This design meets the need for shorter distance commuter, suburban or school transport operating through low emission zones.

The L9 engine offers a highly productive power solution for high-deck 12-metre coaches focused on cost-effective versatility, but achieves this while delivering rapid acceleration and high cruising speeds. New to the coach market is the L9N natural gas engine bringing the option of close-to-zero emissions with diesel-like performance. For premium, full size coaches the X12 is newly introduced for Euro VI with an innovative weight-saving design and fuel-saving XPI extra high pressure injection system, combined with all the robust durability expected of a Cummins heavy-duty engine.

For smaller coaches, the compact F3.8 or B4.5 is an ideal power source, bringing the operational cost saving of a high efficiency 4-cylinder engine, while out on the road they provide refined performance with smooth acceleration and relaxed cruising speeds. The compact F2.8 engine recently upgraded for Euro VI applications opens up new possibilities for mini-coaches, both for van-based chassis and custom-designs.

No other engine company powers more trucks, in more countries, than Cummins. Every one of engines comes with innovation you can depend on, and that’s why Cummins is the power of choice for trucks that demand day-in, day-out reliability while achieving the highest levels of fuel efficiency. Cummins engines can be found wherever the work is toughest, from the frozen roads of Siberia to the Saudi desert, from climbing mountain roads in the Himalayas of India to crossing the rough tracks of the outback in Australia. With Cummins, every operator can be sure that engine durability is built-in and comes with a lineage that extends all the way back to the mid-1930s with the famous Model H, the first heavy-duty truck diesel in America.

Cummins powers it all from 2 to 400 ton trucks

Cummins presence in the industry extends from a 2-ton pickup truck featuring our F2.8 compact engine, all the way to ultra-heavy tow trucks capable of hauling a massive 400 tons powered by the strength of our X15 engine – you can see how Cummins powers it all here:

Cummins design engines for every application, every emission level and every type of truck, supported by the broadest global manufacturing and service network in the business. In Europe, Cummins plays a leading role in the medium duty sector, building Euro VI engines at Cummins Darlington, UK facility for DAF and Scania based on the Cummins B Series platform, as well as supplying the Cummins 9-litre natural gas engines for Volvo and Renault urban trucks. Cummins can be found powering all-terrain military vehicles and the largest oilfield trucks built in Europe, and Cummins is getting ready to power more.

Powering 2,000 hybrid buses in Europe

Cummins has achieved a Euro VI technology achievement by reaching a total of over 2,000 hybrid-adapted engine installations in buses operating across Europe, making a major contribution to reducing the carbon footprint. Cummins ‘H’ versions of the B4.5 and B6.7 are specially configured to integrate with the hybrid driveline and provide a seamless Stop/Start function for the vehicle.

The Cummins Euro VI four-cylinder B4.5-H and six-cylinder B6.7-H hybrid adapted engines can be found operating in cities across Europe, specified by bus manufacturers ADL, Wrightbus, VDL, Solaris, Van Hool, Vectia and Irizar.

Hybrid installations

Cummins hybrid installations extend from single-deck midi-buses to double- deck and articulated tram-buses. As the leading hybrid engine supplier in the European bus market, Cummins’ success is also replicated in the North American transit market where around 10 per cent of buses entering service are hybrids and virtually all powered by either the B6.7-H or L9-H.

Cummins' hybrid engine expertise has played a key role in helping many bus manufacturers on the road to electrification and has achieved remarkable results in terms of fuel savings, Euro VI-D emissions reduction and vehicle sociability. In terms of fleet decarbonisation, we typically see hybrid drive buses reducing fuel consumption and related CO₂ emissions by around 33 per cent.

Cummins hybrid engines are fully optimized to be used within all hybrid drivetrains, including those supplied by Siemens, BAE Systems, Eaton and Allison. They are compatible with both series or parallel hybrid systems due to our unique capability to tailor engine systems to the needs of the application and closely collaborate with system suppliers.

With Cummins engines specifically developed to enhance hybrid system performance, this capability provides operators with the energy choice they need alongside conventional clean diesel drivelines, the option of renewable natural gas power and full-electric solutions from Cummins.

Streamlining the engine

The hybrid engine is streamlined by eliminating power-take-off accessories used to drive steering pumps, fan drives, air compressors and air-conditioning as they can be run directly from the electrical supply from the battery. The starter motor can also be removed, although this is retained in some buses as a back-up. Transferring the engine-driven accessory load of up to 60 kW (80 hp) to the hybrid system enables a more efficient energy delivery on demand compared to that of a conventional bus engine installation.

Cummins L9N natural gas engine achieves close-to-zero emission levels for trucks and buses operating across Europe & Turkey. With the ability to run on either CNG or LNG, the 8.9-litre engine is a proven performer in Volvo and Renault trucks, and available from bus builders including Anadolu Isuzu, Autosan, BMC, Otokar, Solaris and Temsa. The L9N is fully compatible with operating on Biogas, also known as Renewable Natural Gas (RNG), replacing fossil-based natural gas with a sustainable fuel option to achieve the goal of fleet decarbonization. Find out about the clean, quiet running L9N with up to 239 kW (320 hp) output in our brochure here: L9 & L9N Euro VI engines.

A new fleet of Solaris Urbino CNG buses in the Beskid Slaski District of Poland powered by the L9N Phase-D. While the Urbino CNG can be found operating in major European cities, including Paris and Warsaw, here the bus and its Cummins engine are equally at home connecting the small town with the surrounding countryside, helped by a range of up to 400 km without refueling.

You also read our case study about how a challenging bus route up to an altitude of 2,210 m on Mount Erciyes proves natural gas capability: Cummins Natural Gas reaches new heights In Turkey

The B4.5 and B6.7 Euro VI bus engines can incorporate Cummins unique Stop/Start technology, with the capability to eliminate almost all engine idling at bus stops, traffic lights and pedestrian crossings. The engine-off mode is automatically operated for typically 16 to 20 stops per operating hour, dependent on the route. The engine position sensor ensures instant readiness for a soft restart in just 0.5 seconds following the engine-off mode. The robust Stop/Start system is fully integral to the engine design and has proved popular with both double-deck and single-deck operations.

The Stop/Start function can achieve up to 8 percent fuel savings on city bus duty cycles, potentially saving over 2,000 litres of fuel annually with a corresponding saving of 5 metric tons of CO2 greenhouse gas per year to lower the carbon footprint of the vehicle. The bus emits zero emissions and zero-noise for an average of 8 minutes per operating hour when the engine-off phase is engaged, enhancing sociability in the vicinity for passengers and pedestrians.

We invest as much in our service & parts capability as we do our engine technology to ensure maximum reliability and the highest possible uptime for your fleet.

So, if you’re looking for the very best in performance and long-term value, the choice has to be genuine Cummins parts. Nothing works better or lasts longer, all backed by the best warranty in the business.

And, you can be sure that wherever there’s a Cummins-powered bus or coach, our European service network is ready to support the engines at the heart of your business.

From engine health checks to engine rebuilds we have service programmes ready to support your business.

Supporting Our Euro Bus Engines

See how our customer support network utilise the latest service & smart diagnostics tools to keep buses fleets powered by our European-built engines up and running. This video features some of our service technicians talking about how they are able to ensure the highest levels of vehicle uptime.

Ready To Support In Turkey

Cummins is the leading supplier of engines to the Turkish bus market, with over a 50% share of city fleets across the country. Cihat Sezgin talks about how the Cummins customer support network provides engine expertise, training programs and rapid parts delivery, playing a key role in the exceptionally high levels of uptime achieved by major bus fleets operating in Ankara, Istanbul & Izmir. Along with the impressive bus fleets on the move, you can see some great views of the cities.

Genuine Cummins Parts - There Is A Difference

Whether you’re running a city fleet, touring coaches or intercity buses, you need performance and productivity. That’s why you bought Cummins-powered vehicles in the first place.

Keep it running for years to come by using only the best parts. Genuine Cummins new or ReCon® parts are built to meet or exceed your engine’s original specifications for performance, reliability and durability.

Choosing Genuine Cummins parts means less downtime, lower operating costs and better engine performance. It is also the reason these parts come with a full factory warranty.

Cummins new and ReCon parts warranty is comprehensive, ensuring peace of mind and financial protection. Every part is backed 100% for parts, labour, progressive damage and consumables, with no deductible.

Support When You Need It

Of course, it doesn't matter how good Genuine Cummins quality is if a part isn't close at hand when you need it. That's why Cummins distributors and dealers stock thousands of commonly used parts in local inventory. If for some reason the part you need isn't already in stock, we can quickly obtain it through our European global logistics network.

Regardless of where you are located, we can find the exact. Genuine Cummins parts you need and have it immediately expedited to you, minimizing vehicle downtime.

Looking for options to convert your old bus to Euro VI emissions?

From specification to installation our team does it all, including repower programs for pre-Euro VI vehicles, ready for low emissions zones. From day one, fleet performance goes up and service requirements go down. With new engines at the heart of your repowered fleet, your hard-working buses and coaches can be as efficient as possible, for years to come.

Looking to replace your tired Euro VI engine with new?

The first Euro VI engine installations may be nearing the end of their useful life - so let Cummins give them a new one. Talk to us about new B4.5 and B6.7 engines, stocked straight from the Darlington production line, with all the latest improvements and full warranties. We can replace aftertreatment with factory-built systems.

Tried and Tested

The Cummins repower solution is offered currently around the ADL Enviro400 double-deck bus, where a number of buses have now been repowered and operated successfully.

The clean vehicle retrofit accreditation scheme (CVRAS) testing demonstrated emission reductions even lower than the Euro VI emission standard. This testing has shown that the Euro VI repower has led to the bus producing 99% less NOx and 17% less CO2 in comparison to when it was powered by a Euro V engine.

Repowering the Routemaster

An early proof of concept was established by a Cummins B4.5 repower of London Routemaster bus RM1005 which first entered service in 1962 and is now fully certified to meet Euro VI emissions and is Low Carbon certified due to a remarkable fuel efficiency of 9.5 mpg. The Routemaster was considered the most challenging bus to repower due to a very restricted powertrain envelope. See the success of this project on our video here:

Warranty & Extra Cover Protection

Exceptional design and meticulous workmanship go into every product we make and we stand behind the quality of our Euro VI bus and coach engines with a factory-backed, fully comprehensive Base Engine Warranty for the first two years of operation.

We know that your engine purchase is a long-term investment and so you can count on our Extra Cover Warranty to protect your engine for up to five years from the first date in service, with a highly cost-effective choice of coverage options.

To find our more, download the Cummins Warranty and Extra Cover protection brochure for Euro VI bus & coach engines:

• B4.5 & B6.7
• L9