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Natural Gas Engine for Truck and Bus
Following six years of reliable performance, with over 5,000 engines
currently in service worldwide, the C Gas Plus engine is being replaced by
the ISL G. Certified to U.S. EPA 2010 & CARB emissions levels and available
in ratings from 250 to 320 hp, the ISL G combines Cummins proven
Exhaust Gas Recirculation (EGR) technology with a Three-Way Catalyst (TWC)
to offer improved efficiency and lower costs.
The C Gas Plus 250 hp rating is available in North America to the end of
2007. For Euro-certified markets, the C Gas Plus certified to Euro IV is
available.
Customers with the C Gas Plus engine will continue to be supported by the
Cummins distributor and service network.
Building on the rugged, reliable design of Cummins diesel engines, the
Cummins Westport C Gas Plus engine is a six-cylinder Lean-Burn Spark-Ignited
natural gas vehicle engine that delivers from 250 to 280 hp with ultra-low
emissions. It provides excellent torque, high fuel efficiency and
reliable, robust performance.
For information on tax incentives like the Highway and Energy Bill,
please visit our Incentives page.
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download
Clean Air Solutions for Transit 

download
Clean Air Solutions for Vocational Trucks
 |
FEATURES
- Ultra-low emissions - certified to:
- U.S. EPA 2007 standard
- U.S. EPA 2007 transit bus standard
- CARB optional Low-NOx and Low-PM
- Euro III
- Proven "Plus" technology
- Reliable - easy to maintain
- Electronic controls and diagnostics
- Economical - low-cost natural gas
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download
Information Flyer
(753 kb)
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SPECIFICATIONS
| Advertised Horsepower |
250-280 hp |
186-205 kW |
| Peak Torque |
660-850 lb-ft |
895-1152 N•m |
| Governed Speed |
2400 rpm |
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| Clutch Engagement Torque |
410 lb-ft |
555 N•m |
| Number of Cylinders |
6 |
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| Compression Ratio |
10:1 |
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| Oil System Capacity |
6.3 U.S. gal |
23.9 L |
| Coolant Capacity |
10.7 U.S. qts |
10.1 L |
| Net Weight w/ Std Accessories, Dry |
1,330 lbs |
604 kg |
| Fuel Type |
CNG/LNG
Methane number 65 or greater |
Cummins Westport engines can accept a wide range of natural gas fuel compositions. Use our Fuel Performance Specification Calculator to ensure compatibility.
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RATINGS
| Model |
Advertised HP
HP (kW) |
Peak Torque
lb-ft (N·m) |
Spec Sheet |
| CG-250* |
250 (186) @ 2400 RPM |
750 (1017) @ 1400 RPM |
download PDF |
| CG-250* |
250 (186) @ 2400 RPM |
660 (895) @ 1400 RPM |
download PDF |
| *
The 250 hp rating is available in North America until 2008, when
it will be replaced by the ISL G, with ratings from 250–320 hp. |
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