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Scania truck engines from 220 to 530 hp

Scania’s truck engine range has been completely renewed for the 4-series. Four engine ranges cover outputs from 220 to 530 hp. The engines comply with Euro 2 exhaust and noise emission standards and feature either mechanical or computer-controlled fuel injection.

Three sturdy 9-litre engines on top of their task

Scania’s 9-litre engine has been extensively revised and enlarged to suit a broader range of applications. Outputs are 220, 260 and 310 hp. The lower two are mainly intended for distribution work, whereas the new top output is suitable for long-haul applications, where low chassis weight is top priority.

The engines are characterised by much better driveability, due to flatter and higher torque curves compared with previous versions, lower environmental impact, less noise and greater durability. Maintenance requirements are particularly low. All engines are fuel-efficient, especially at part-load, where most normal driving takes place. The comparatively high swept volume greatly promotes performance and service life – the engine is always ”on top of” its task.

The basic design of the engine remains unchanged, featuring a cast-iron cylinder block with replaceable liners, separate cylinder heads and a high-placed camshaft with short pushrods for precise valve control. The engine has a hot and a cold side, with all fuel-system components grouped on the ”cold” left.hand side and the exhaust system on the ”hot” right-hand side.

The enlargement from 8.48 to a full 9 litres has been achieved by extending the stroke from 136 to 144 mm. Main journal diameter is up 5 mm to 95 mm. New pistons are used, with a re-shaped combustion chamber, and the compression ring is mounted high in the piston to reduce the ”dead volume” in the combustion chamber. A flame-start device is introduced to enhance cold starting and cut white smoke emissions. Cooling in the cylinder heads has been improved and the intake and exhaust ducts have been redesigned to promote air flow and swirl. The rocker covers are fully rubber-mounted to cut noise.

The injection pump is flange-mounted for more precise injection timing and to reduce noise. Injection is mechanically-controlled and pilot injection further reduces noise. Other ancillaries have been modified in line with the 4-series 12- and 14-litre engines.

Thus, the fan is crankshaft-mounted. A new, higher-capacity air compressor is used to cope with new demands and systems for load-handling. Lubrication oil is cleaned by a full-flow paper filter, supplemented by the highly-efficient Scania centrifugal oil cleaner to cope with the long mileages involved in international long-haulage.

Tried-and-proven 11-litre engine for demanding work

Scania operators who appreciate the classical virtues of Scania’s 11-litre engine can also specify it in the 4-series. This outstandingly well-proven engine has been extensively revised and updated for demanding applications in the 4-series. The output is 340 hp, which is suitable for long-haulage at around 40 tonnes.

The engine has been tuned for good driveability and a healthy torque delivery down to 1,000 r/min. Compared with previous versions, the engine has a lower environmental impact and generates less noise. The comparatively high swept volume in this output class offers trouble-free operation, easy maintenance and a long service life.

The basic engine is unchanged. A new camshaft is fitted, giving new timing. Pistons are new, featuring a re-shaped combustion chamber, and the compression ring is mounted high in the piston to reduce the ”dead volume”. A flame-start device is introduced to enhance cold starting and cut white smoke emissions.

The injection pump is flange-mounted for more precise injection timing and to reduce noise. Injection is mechanically-controlled and pilot injection further reduces noise. The ancillaries have been modified in line with other 4-series engines. Thus, the fan is crankshaft-mounted and a maintenance-free poly-V drive belt with an automatic belt tensioner drives the coolant pump, alternator and air conditioning compressor.

A new, higher-capacity air compressor is used to cope with new demands and systems for load-handling. Lubrication oil is cleaned by a full-flow paper filter, supplemented by the highly-efficient Scania centrifugal oil cleaner. Two additional outputs,

320 and 360 hp, are available in Euro 1 form.

High-efficiency 12-litre power – 360 and 400 hp

Scania’s new 12-litre engine is an important platform for future developement. Four-valve technology, as well as sophisticated injection control and air management result in an unusually high efficiency rating – 189 g/kWh in specific fuel consumption – and outstanding environmental characteristics. The driveability of the 12-litre engine is exceptional, with its wide usable torque band and similarly wide economy range. Close to peak power is delivered all the way between 1,600 and 1,900 r/min.

For demanding long-haulage at around 40 tonnes, the 400-hp version is now supplemented by a 360-hp version with similar characteristics. This new version achieves as high an efficiency rating using a mechanical injection system as the 400-hp with EDC. Both versions are highly suitable for anything from long-haulage, where maximum performance and efficiency are top priorities, to site and off-road operation, where low-speed torque is decisive for mobility.

Launched together with the first 4-series models in October 1995, Scania’s new 6-cylinder 12-litre engines have been designed with maximum efficiency, robustness, simplicity and serviceability as guiding principles.

The engine features a cast-iron cylinder block with replaceable liners, separate four-valve cylinder heads and a high-placed camshaft with short pushrods for precise valve control. The engine has a hot and a cold side, with all fuel-injection components on the ”cold” left.hand side and the exhaust components on the ”hot” right-hand side.

Articulated pistons are used, featuring a steel crown attached to the lower aluminium section by the gudgeon pin. The steel crown can withstand higher pressure and higher temperatures. The piston rings are positioned high on the piston to reduce the "dead volume" in the combustion chamber. This design improves fuel consumption and smoke emission. The pistons are gallery-cooled by oil sprayed into the pistons from below via nozzles at the bottom of each cylinder.

With the aid of four-valve technology and state-of the art fuel injection technology, the combustion process in the cylinder has been optimised to provide as efficient gas flow and combustion as possible.

The fan is crankshaft-mounted and a maintenance-free poly-V drive belt with an automatic belt tensioner drives the coolant pump, alternator and air conditioning compressor. A high-capacity air compressor copes with new demands and systems for load-handling. Lubrication oil is cleaned by a full-flow paper filter, supplemented by the highly-efficient Scania centrifugal oil cleaner.

Legendary 14-litre V8 turns out 460 or 530 hp

Scania’s legendary 14-litre V8 has been entirely revised and strengthened over the last couple of years. The engine now features an advanced electronic fuel injection system, which benefits fuel consumption, noise reduction and emission control. Outputs are 460 and 530 hp and massive torque is delivered over a wide rev band.

These engines are characterised by first-class driveability, low environmental impact and excellent durability. This type of performance is ideal for various types of very heavy specialised haulage and long-haulage in countries with high permissible gross weights.

The basic design of the engine remains unchanged, featuring a cast-iron cylinder block with replaceable liners and separate cylinder heads. Articulated pistons are used on the top-output 530-hp engine, while all-aluminium ones are fitted to the 460-hp engine.

The injection system is based on a new generation of EDC (Electronic Diesel Control). Both the amount of fuel injected and injection timing is controlled by the system, permitting precise control of the combustion process under all load conditions. The injection pump is flange-mounted for more precise injection timing and to reduce noise. With improved power, torque and environmental performance, specific fuel consumption is 192 g/kWh for the 460-hp and 193 g/kWh for the 530-hp version.

The fan is crankshaft-mounted and the fan hub doubles as a torsional vibration damper. A maintenance-free poly-V drive belt with an automatic belt tensioner drives the coolant pump, alternator and air conditioning compressor. A high-capacity air compressor copes with new demands and systems for load-handling. Lubrication oil is cleaned by a full-flow paper filter, supplemented by the highly-efficient Scania centrifugal oil cleaner.