Cummins ISL G Natural Gas Engine Parts and Overview
The Cummins ISL G is a 8.9-liter, inline 6-cylinder natural gas engine designed to offer cleaner emissions and fuel efficiency, tailored for buses, refuse haulers, medium-duty trucks, and vocational vehicles. Built on Cummins’ ISL diesel platform, the ISL G has been engineered to run on compressed natural gas (CNG), liquefied natural gas (LNG), or renewable natural gas (RNG), providing an environmentally friendly alternative to diesel engines. It was one of the first heavy-duty engines to meet EPA 2010 and Euro VI emissions standards without needing a diesel particulate filter (DPF), thanks to its stoichiometric combustion and three-way catalyst.
The engine is widely used across several industries, particularly in vehicles that operate in urban areas and require lower emissions, such as: city bus fleets due to low emissions and quiet operation; garbage trucks for its strong torque, ideal for stop-and-go routes; delivery and regional haul trucks, providing an eco-friendly option; some school bus fleets, contributing to lower emissions and improved air quality in residential areas.
ISLG Natural Gas Engine Features
- 6-cylinder inline design with an 8.9-liter displacement, based on the proven ISL diesel block.
- Built with a cast-iron block and aluminum alloy pistons, ensuring a lightweight yet durable structure.
- Designed to run on CNG, LNG, or RNG, providing flexibility in fuel sources for different regions and applications.
- Lower carbon emissions make it suitable for operations in urban and environmentally sensitive areas.
- Delivers 250 to 320 horsepower and 730 to 1,000 lb-ft of torque, making it effective for medium- and heavy-duty applications.
- Optimized for low-speed, high-torque operations commonly needed in stop-and-go driving conditions, such as city buses and refuse trucks.
- Operates on a stoichiometric air-to-fuel ratio that enables it to run cleaner without needing complex aftertreatment systems.
- Utilizes a three-way catalyst (TWC) instead of selective catalytic reduction (SCR), simplifying maintenance and reducing costs.
- Meets EPA and Euro VI emissions standards without a diesel particulate filter, relying on the TWC to reduce NOx, CO, and hydrocarbons.
- Reduces particulate matter by more than 90%, making it suitable for environmentally regulated zones.
- Equipped with a high-capacity cooling system to prevent overheating under heavy loads and high ambient temperatures.
- Pressurized lubrication system ensures adequate oil distribution, prolonging engine life and maintaining performance.
Cummins ISL-G Strengths and Benefits
- Low Emissions: Meets stringent EPA and Euro standards without the need for DPFs or SCR systems.
- Fuel Flexibility: Can use CNG, LNG, or RNG, making it adaptable and cost-effective in areas where these fuels are readily available.
- Reliable and Durable Design: Built on CumminsÕ proven ISL diesel platform, known for long service life.
- Lower Operating Costs: Reduced maintenance needs and simplified emission controls help lower overall operating expenses.
The Cummins ISL G is an eco-friendly, versatile, and durable natural gas engine suitable for medium- and heavy-duty applications requiring reduced emissions. Its simplified emission control, fuel flexibility, and strong low-end torque make it ideal for urban transit, refuse collection, and other vocational applications. With proper maintenance, the ISL G can deliver reliable, cleaner performance, aligning with both environmental and operational needs.
To keep your Cummins ISL G engine running at its best, regular maintenance and high quality part replacements from HHP is key!
