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Gas engine for trucks

In line with customer demand, Scania introduces a gas engine as an optional power source for trucks primarily in distribution, garbage collection and other types of urban haulage work. The engine, which operates on either CNG or biogas, provides several environmental benefits. Compared to a conventional diesel engine, nitrogen oxide emissions are down by 70 percent and particulates by 80 percent. Based on the Otto principle like a petrol engine, this engine has a smooth character with a particularly low external noise level.

The demand for gas-fuelled vehicles is growing in pace with increasing environmental awareness in the haulage industry and among transport buyers. Some haulage operators are eager to take environmental initiatives and some are pushed by their customers to keep the environmental impact of transports as low as possible.

Gas-powered vehicles are also subject to various incentives and promotional schemes. Some countries favour them for their lower emission levels, some because of a surplus of natural gas from petroleum extraction. The ability for the vehicle to run on biogas - instead of CNG, which is a fossil fuel - is another beneficial environmental factor.

In many countries, natural gas is an inexpensive fuel since it is a surplus product from oil extraction. This effectively compensates for the efficiency, which is slightly lower than that of a diesel engine. However, the distribution network and operating range for a gas-driven vehicle are limiting factors for more widespread use.

Technical features

Scania's gas engine is a 260 hp 11-litre unit, which has been converted to work according to the Otto-principle. The compression ratio is much lower and the cylinder heads are adapted for spark plugs and the engine is fitted with a gas mixer. Fuel is supplied from four 140-litre gas tanks fitted vertically behind the cab. The operating range is around 300 km.

The engine can be specified with left- or right-hand-drive in two- and three-axle rigids for distribution, construction and general haulage. The main application is garbage collection in urban areas, where low emissions and silent operation are prime considerations. The additional weight including gas tanks is limited to 500 kg.

Transmission options include 8+1-speed range-change and 12-speed range-splitter manual gearboxes, both fitted with the Scania Retarder as standard to provide smooth auxiliary braking capacity. Automatic gearboxes with retarders are also available.

Technical data

260 hp gas engine

Engine 

OSC11 03 260

Operating principle 

Otto (spark ignition) 

Fuel 

CNG or biogas 

Fuel system 

Gas mixer and throttle 

Swept volume 

11.0 litres 

Cylinders 

6 in-line 

Cylinder heads 

Valves per cylinder 

Bore x stroke 

127 x 145 mm 

Compression ratio 

12.6:1 

Oil capacity 

27 litres 

Oil change interval 

Up to 45,000 km 

Max. power 

260 hp (191 kW) 

at 

2,000 r/min 

Max. torque 

1,000 Nm 

at 

1,150 r/min 

Engine-braking 

No exhaust brake 

Retarder standard 

Min. spec. fuel cons. 

201 g/kWh 

Additional weight 

500 kg 

Operating range 

300 km