Cummins L Series engine
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The Cummins ISL is a straight-6 diesel engine designed and produced by Cummins. It is 8.9 liters in displacement, and went into production in 1998. The engine was based on its 8.3 liter predecessor, the Cummins C8.3 engine.
By late 2003, Cummins announced that they will revise the engine to sport a High-Pressure Common-Rail (HPCR) system to help with emissions and also a variable geometry turbocharger system to help with the performance on this engine.
The Cummins ISL also has a sister engine which is based on the existing ISL 8.9-liter block which runs on compressed natural gas. Cummins reintroduced this engine as the L Plus engine which has a power rating of 330 horsepower (246 kW), and it is for 60-foot (18 m) articulated bus. A few thousand units of this engine are now operating in a wide variety of applications.
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[edit] Applications
- Bus
- Motor coach
- Motor home
- Fire truck
- Hybrid bus
[edit] Popular power ratings
- Urban bus
- 730 lbf•ft (990 Nm) @ 1300 rpm, 250 hp (186 kW) electronically governed at 2200 rpm
- 900 lbf•ft (1220 Nm) @ 1300 rpm, 280 hp (209 kW) electronically governed at 2200 rpm
- 1100 lbf•ft (1492 Nm) @ 1300 rpm, 330 hp (246 kW) electronically governed at 2200 rpm
- Firetruck/Motorhome/Truck
- 1050 lbf•ft (1424 Nm) @ 1300 rpm, 310 hp (231 kW) electronically governed at 2100 rpm
- 1150 lbf•ft (1559 Nm) @ 1300 rpm, 330 hp (246 kW) electronically governed at 2100 rpm
- 1200 lbf•ft (1627 Nm) @ 1300 rpm, 400 hp (298 kW) electronically governed at 2200 rpm
[edit] ISL vs. L10
The ISL is not to be confused with the older L10 series, which Cummins had produced and sold from 1982 to early 1998. The old L10 series, which like the current ISL, had seen use in the applications listed above (plus, early Dennis double decker buses), displaced 10.0 liters, was slightly larger, and had been replaced by the M11 entirely in 1994, although the natural gas version, known as the L10G, had hung on until the spring of 1998.
