Cummins L-series engine
 | This article includes a list of general references, but it lacks sufficient corresponding inline citations. (November 2010) |
| Cummins L series | |
|---|---|
| Overview | |
Cooling system | Water-cooled |
| Chronology | |
| Successor | Cummins X10 |
The Cummins L-series engine is a straight-six diesel engine designed and produced by Cummins. It displaces 8.9 litres (543.1 cu in), and began production in 1982 as the L10 at the Jamestown Engine Plant in Jamestown, New York. After lengthening its stroke from 136 to 147mm, its displacement was enlarged to 10.8 litres and the engine renamed ISM 11, later M11.
The ISL 9 and current L9 engines are not related to the L10 engine, but instead based on the smaller C-series platform with the 135mm stroke of the C8.3 enlarged to 144.5mm, together with 4 valves per cylinder, giving it 8.9 litres displacement.
[1] The L10 displaced 10.0 litres (610.2 cu in), and was available in either a vertical form, for upright use in trucks and buses, or horizontal form, for underfloor use in buses and trains. The L10 was Cummins's first competitive offering in the British bus market, as their earlier production had been too large and heavy.[2] However, it had a troublesome introduction to the British market, with high oil consumption and sealing problems.
By 1994, it had been developed into the
In 2016 onwards, the ISL9 was simplified to L9, though physically it shares no resemblance to the old L10 engine: The current L9 engine is a stroked version of the C8.3 engine platform, while the current M11 engine is a stroked version of the original L10 engine platform.
In February 2023, Cummins announced that the L9, alongside the
Models
| Maker | Name | Displacement | Fuel | Years in production | Found in |
|---|---|---|---|---|---|
| Cummins | L10 | 10L | Diesel | 1982–1998 | |
| ISL | 8.9L | 1999–2007 | |||
| ISL9 | 2007–2017 | ||||
| L9 | 2017–present | ||||
| Cummins-Westport | L10G | 10L | CNG | 1992–2001 | |
| L Gas Plus | 8.9L | Natural Gas | 2001–2008 | ||
| ISL G | 2008–2018 | ||||
| ISL G NZ | |||||
| L9N | 2018–present |
Popular power ratings
Diesel-powered urban bus[5]
- 730 pound force-feet (990 N⋅m) at 1300 rpm, 250 horsepower (186 kW; 253 PS) electronically governed at 2200 rpm
- 900 pound force-feet (1,220 N⋅m) at 1300 rpm, 280 horsepower (209 kW; 284 PS) electronically governed at 2200 rpm
- 1,100 pound force-feet (1,491 N⋅m) at 1300 rpm, 330 horsepower (246 kW; 335 PS) electronically governed at 2200 rpm
Natural gas-powered urban bus (L Gas Plus, ISL G, ISL G NZ, L9N)[6][7]
- 900 pound force-feet (1,220 N⋅m) at 1300 rpm, 280 horsepower (209 kW; 284 PS) electronically governed at 2000 rpm
- 860 pound force-feet (1,166 N⋅m) at 1300 rpm, 300 horsepower (224 kW; 304 PS) electronically governed at 2100 rpm
- 1,000 pound force-feet (1,356 N⋅m) at 1300 rpm, 320 horsepower (239 kW; 324 PS) electronically governed at 2000 rpm
- Firetruck/motorhome/truck[citation needed]
- 1,050 pound force-feet (1,424 N⋅m) at 1300 rpm, 310 horsepower (231 kW; 314 PS) electronically governed at 2100 rpm
- 1,150 pound force-feet (1,559 N⋅m) at 1300 rpm, 330 horsepower (246 kW; 335 PS) electronically governed at 2100 rpm
- 1,200 pound force-feet (1,627 N⋅m) at 1300 rpm, 400 horsepower (298 kW; 406 PS) electronically governed at 2200 rpm
References
- ^ "Worldwide Manufacturing Locations | Cummins". Archived from the original on 2017-12-01. Retrieved 2017-12-01.
- ^ Kennett, Pat (June 1986). "The Cummins Beat". TRUCK. London, UK: FF Publishing Ltd: 55–56.
- ^ "Cummins Engines". Cummins Inc. Retrieved 2020-10-05.
- ^ "Cummins announces new X10 engine, next in fuel-agnostic series, launching in North America in 2026". Cummins Newsroom. Cummins, Inc. 2023-02-13. Retrieved 2023-07-01.
- ^ "Cummins Engines". Cummins Inc. Retrieved 2020-10-05.
- ^ "Cummins Westport - ISL G - Models".
- ^ "Cummins Westport - ISL G Near Zero - Models".