Natural Gas Engine for Truck and Bus.
 The ISL G natural gas engine not
only meets EEV emissions levels today, it also sets a new benchmark for lower alternative fuel vehicle life cycle
costs. In high fuel use applications, the lower alternative fuel costs, improved fuel economy and lower incremental maintenance
costs of the ISL G make it possible to save valuable fleet dollars.
For more information on how using natural gas can improve your bottom line, contact your regional
Cummins Westport sales representative. For information on tax incentives like the Highway and Energy Bill, please visit
our Incentives page.
Features
- Stoichiometric Cooled Exhaust Gas Recirculation (EGR)—Uses high EGR rates in combustion process in place of
excess air (Lean Burn) that improves fuel efficiency and creates an oxygen free exhaust allowing for the use of a
Three-Way Catalyst
- Cummins Cooled EGR—lowers in cylinder temperature and reduces oxygen concentration
- New Electronic Control Module—provides full monitoring and control of engine sensors, fuel system and ignition
system
- Three-Way Catalyst—simple passive device, highly effective hydrocarbon, CO, and NOx control with no exhaust
system related maintenance costs
- Low installed weight—highest power to weight ratio in its class
- Improved clutch engagement torque
- LNG, CNG, or Biomethane capable
- Meets EEV
Specifications
| Advertised Horsepower |
186–239 kW |
250–320 hp |
| Peak Torque |
895–1,356 N•m |
660–1,000 lb-ft |
| Governed Speed |
2,100–2,200 rpm |
| Clutch Engagement Torque |
386 N•m |
285 lb-ft |
| Type |
4-cycle, spark-ignited, inline 6-cylinder, turbocharged, CAC |
| Displacement |
8.9 L |
540 cu. in. |
| Oil System Capacity |
27.6 L |
7.3 U.S. gal |
| Coolant Capacity |
12.4 L |
13.1 U.S. qts |
| Net Weight w/ Std. Accessories, Dry |
680 kg |
1,500 lbs |
| NOx Emissions |
0.2 gm/bhp-hr |
| PM Emissions |
0.01 gm/bhp-hr |
| Fuel Types |
CNG /
LNG /
Biomethane
Methane number 75 or greater
|
Cummins Westport engines can accept a wide range of natural gas fuel compositions.
Use our Fuel Performance Specification Calculator to ensure compatibility.
Ratings
| Model |
Advertised Horsepower
|
Peak Torque @ 1,300 rpm |
| ISL G 320 |
239 kW (320 hp) @ 2,000 rpm |
1,356 N•m (1,000 lb-ft) |
| ISL G 300 |
224 kW (300 hp) @ 2,100 rpm |
1,166 N•m (860 lb-ft) |
| ISL G 280 |
209 kW (280 hp) @ 2,000 rpm |
1,220 N•m (900 lb-ft) |
| ISL G 260 |
194 kW (260 hp) @ 2,200 rpm |
895 N•m (660 lb-ft) |
| ISL G 250 |
186 kW (250 hp) @ 2,200 rpm |
990 N•m (730 lb-ft) |
Maintenance Intervals
| |
Distance |
Hours |
Months |
| Oil and Filter |
12,000 km (7,500 mi) |
500 |
6 |
| Coolant Filter |
12,000 km (7,500 mi) |
500 |
6 |
| Fuel Filter |
24,000 km (15,000 mi) |
1,000 |
12 |
| Spark Plugs |
36,000 km (22,500 mi) |
1,500 |
18 |
| Change Coolant |
48,000 km (30,000 mi) |
2,000 |
24 |
| Valve Adjustment |
48,000 km (30,000 mi) |
2,000 |
24 |
|
|
