Cummins Westport manufactures and markets factory built dedicated natural gas and liquid propane gas engines that meet or exceed current EPA (Environmental Protection Agency) emissions standards. Our engines are based on the proven line of Cummins engine products, built to provide power, reliability and performance. We do not offer conversions.

Cummins Westport Inc. is a 50:50 Joint Venture between Cummins Inc. and Westport Innovations Inc. 

Cummins Westport offers low-emission, high performance, spark-ignited alternative fuel engines for the medium and heavy-duty truck and bus markets through the Cummins global sales and distribution channels. Our products, based on the proven line of Cummins engines, are built in Cummins factories and are sold and supported in authorized Cummins dealerships worldwide. 

We also work closely with Westport Innovations, a company dedicated to leading the shift of the international commercial engine industry from oil-based to gaseous fuels. Westport develops technologies that allow diesel engines to operate on alternative fuels such as natural gas, propane and hydrogen. Westport has global technology alliances, industry and government partnerships and connections throughout the natural gas and alternative fuel industries. For more information on Westport Innovations, call (604) 718-2000 or visit their website at www.westport.com.

Natural gas is actually a safer vehicle fuel than gasoline. Natural gas is lighter than air and will dissipate into the atmosphere while gasoline and diesel, which are heavier than air, fall to the ground. In the unlikely event of a leak, natural gas dissipates rapidly rather than pools. This is why it is safe to park your natural gas vehicles in underground and enclosed parking garages. Unlike gasoline, natural gas is not toxic and, in most applications, it is safer than gasoline. 

With all fuels, some precautions must be taken. Natural gas vehicle systems are completely sealed. If the system is properly maintained, there are no releases of natural gas from the vehicle to the atmosphere, either during operation or while parked. Refueling connectors are also designed to eliminate the release of natural gas during refueling. If the seal between the refueling hose and the vehicle is broken by, for example, inadvertently driving away from the refueling station with the hose attached, the flow of natural gas is stopped automatically. (Source: Canadian Natural Gas Vehicle Alliance)

Natural gas users utilize a different fuelling infrastructure, and some users may require changes like added ventilation to their facility’s buildings to accommodate servicing. Your local natural gas fuel provider can provide more information on what you need to know.

You’ve come to the right place. As leaders in the natural gas automotive industry, we have the tools and information you need. Cummins Westport has the largest product line of natural gas engines for medium and heavy-duty truck and bus. Our proven products are EPA and CARB (California Air Resources Board) certified and offer the lowest emissions advantage today. Over 75 city fleets use Cummins Westport engines today and our engines have powered millions of miles of reliable service.

Cummins Westport can connect you to the local Cummins Distributor, fuel supplier and government agencies in your area that can facilitate your move to clean burning natural gas. Cummins Westport products are sold and distributed via the Cummins worldwide sales and service support channels. This means that with 550 independent and company-owned distributors, 4,500 parts or service locations in 160 countries and territories, you can count on Cummins Westport to offer you the expertise and support you need.

• For fueling information, contact your local natural gas fueling supplier.
  
  
• For information on natural gas vehicles and their benefits, visit the Natural Gas Vehicle Coalition website
  • In Canada - http://www.ngvcanada.org
  • In Europe - http://www.engva.org
    
    
• For a list of fueling stations in USA and Canada click on one of the following links: http://www.cleanenergyfuels.com/stations/stations.html or http://www.ngv.org/ngv/ngvorg01.nsf/bytitle/cngstations.htm
  
  
• For other locations, contact your local Natural Gas or Propane Vehicle Association and they will be able to provide you with the information you need.
  
  
• For information on funding available, visit our Incentives page.
  
  

Cummins Westport offers you a total solution — natural gas engines, worldwide support and service via the Cummins network, infrastructure and funding assistance. To find your nearest Cummins distributor, visit our Find Your Distributor page, or contact the Cummins Westport Sales & Marketing Representative in your region.

Many fleets, large and small, across North America and the world, are moving to natural gas, which offers low emissions and high performance. With increasing concern over energy security, changing emission regulations and future fuel costs, natural gas can be an attractive alternative to diesel fuels. The Cummins Westport product line meets or exceeds the EPA emissions standards today and in the right application can offer an economic advantage over diesel in the future. 

CWI’s full range of low emissions natural gas engines from 150-320 hp offer the power and torque needed for shuttle buses, street sweepers, medium duty trucks, urban transit, articulated buses, and heavy refuse truck applications. 

Cummins Westport’s clean engines are reducing emissions while providing excellent service and performance in cities around the world like Los Angeles, Washington, Boston, Phoenix, Sacramento, Tacoma, Dallas, Beijing, Cairo, and Paris.

Cummins Westport provides engines to a variety of OEMs (Original Equipment Manufacturers) that manufacture vehicles for a variety of applications. The OEM can manufacture the vehicle you want with the specifications you need. 

Your Cummins Westport Sales representative can provide you with more information.

A gasoline engine is a stoichiometric engine, which uses an efficient combination of air and fuel for total combustion. It intakes a mixture of gas and air, compresses it and ignites it with a spark (spark ignition). Most gasoline engines run in light duty vehicles such as passenger cars and small trucks. 

A diesel engine is a heavier duty product designed for work in industrial, automotive, and truck applications. It takes in only air at the beginning of the cycle, compresses it and then injects fuel into that compressed air. The heat of the compressed air lights the fuel spontaneously. So diesel engines operate with compression ignition (no spark plugs). The compression of fuel and air is at a much higher compression ratio, which results in better efficiency and higher power. 

A natural gas engine is a combination of the two. For example, the Cummins Westport line of spark ignited natural gas engines are based on the Cummins diesel platform, and share diesel life and durability, but they’ve been designed for optimal performance using clean burning alternative fuels. Spark Ignited like a gasoline engine, but operating with much leaner air/fuel mixture results in a tremendous emissions advantage with diesel like power and torque needed for a heavy duty application, such as a refuse truck or bus.

CNG is compressed natural gas. It’s commonly used to heat homes and run appliances. On vehicles, CNG is stored similar to a car’s gasoline tank – attached to the rear, top or undercarriage of the vehicle in a tube-shaped storage tank. Today, natural gas is most commonly used in its compressed form (CNG).

LNG is liquid natural gas. It has been cooled to get it into a liquid form. It takes up less space to transport and store, so is often used for longer-range applications. It’s higher energy density is also beneficial for heavier duty applications. LNG is typically transported globally via tankers and then connected to local natural gas infrastructure on land, where it’s then sold as LNG or compressed and sold as CNG. 

LPG is liquid propane gas. It’s a bi-product of natural gas processing and petroleum refining. It’s gaseous at normal temperatures and liquefies at relatively low pressures. Like natural gas, it burns cleaner than gasoline or diesel.

The choice between using CNG, LNG and LPG in a vehicle fleet depends on several factors such as fleet size, daily mileage, fuel availability, frequency of fueling, and hours of operation. Cummins Westport natural gas engines are capable of running on either CNG or LNG.

• Click here for more information on natural gas and infrastructure
• Click here for more information on propane and infrastructure
• For information on natural gas component suppliers, such as tanks, visit the following sites:
  • Next Gen Fueling
  • Taylor-Wharton
  • Dynetek

Cummins Westport is committed to providing excellent service and ensuring the satisfaction of our customers. The Cummins distributor network, the largest in the world, services our products worldwide. Your local Cummins distributor will be actively involved in supporting your fleet in your location. To contact your closest Cummins Distributor – click here for a directory or contact the Cummins Westport Sales & Marketing Representative in your region.

Cummins Westport‘s B Gas Plus and B LPG Plus are EPA certified for non-road applications excluding power generation and marine applications. For further information contact the Cummins Westport Sales & Marketing Representative in your region.

In addition, Cummins Power offers natural gas powered engines for all applications. For information on Cummins natural gas generators or engines for industrial applications, click here to visit the Cummins website.

You can find out more about Westport Innovations' LNG Trucks at LNGtrucks.westport.com.

Cummins Westport natural gas engines offer the lowest emissions today, meeting or exceeding current EPA and CARB emissions regulations. Our third generation engine technology has improved CNG powered 40-foot transit reliability and operating costs to where owning and operating costs of a CNG bus are similar to a diesel bus.

The Cummins Westport ISL G meets the 2010 EPA emission standards with nitrogen oxides (NOx) emissions of 0.2 gm/bhp-hr without extensive exhaust aftertreatment or incremental cost. Available in ratings from 250 to 320 hp, the ISL G combines the Cummins proven Exhaust Gas Recirculation (EGR) technology with a three way catalyst to offer improved efficiency and lower costs. The emissions advantage of our engines will transition to an economic advantage as diesel engines apply advanced technologies and new fuels and lubricants to meet the new emission standards, which will then increase diesel capital and operating costs. In the very near term our Natural Gas engines, in specific applications, will have an economic advantage over diesel on a life cycle cost basis.

Fuel mileage is dependent on gearing, transmission and vehicle application. Typically, a spark ignited CNG engine will have lower fuel economy than its diesel engine counterpart. This efficiency loss is usually more than offset by a lower natural gas fuel cost resulting in a lower fuel cost per mile.

The Cummins Westport product line of natural gas engines uses many of the same parts as a diesel engine.
For example, the Cummins Westport C Gas Plus engine shares basic components with the Cummins C Series diesel engine. That’s why our engines are warranted by Cummins with the same basic coverages as diesel.

Differences can be found in the fuel system parts, the ignition system and the Electronic Control Module (ECM). Parts such as the piston and ring pack, the cylinder head and camshaft have also been optimized for natural gas use. Please contact one of our sales representatives.

Our natural gas engines perform in a very similar fashion to a diesel engine of the same rating. Noticeably different with our engines is they produce much lower emissions and as a result of the spark ignition are much quieter than their diesel counterparts. With proper gearing performance is very similar to a diesel engine of the same rating.

Scheduled maintenance intervals and the lifetime to rebuild are the same or similar to diesel.

The Cummins Westport product line of natural gas and liquid propane engines are proven performers world-wide. Based on the Cummins engine platform, our engines are engineered for alternative fuel optimization, providing better fuel economy and lower emissions than diesel without sacrificing power and performance. 

There are over 16,000 Cummins Westport engines in service worldwide, many of which operate in the toughest duty cycle – the urban bus market. Our customers report less oil consumption, improved idling, longer intervals between service calls, and low cost per mile. You can count on durability, reliability, performance, and low emissions with a Cummins Westport engine.

At this time there are no reconditioned CWI natural gas engines available.

We would be happy to speak to you about the Cummins Westport product line of gaseous fueled engines. Please email us for more information or call our Sales and Marketing Department at 604-718-8100.