Scania Engines, Clean & Refined Combustion Technology

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For over a century, Scania engines have been the muscle for some of the world’s toughest construction jobs. Scania industrial engines are ready for Stage IV and Tier 4 (final). Scania engine management and emission control ensure an attractive blend of customised performance and long-term operating economy. Scania’s highly regarded engines are developed at the Scania Technical Centre in Södertälje, Sweden, where advanced research and development is conducted on engine management and exhaust after-treatment. Industrial engines are developed in parallel with engines for trucks and buses, complying with emission legislations several years before they take effect. Stage IIIB/Tier 4i engines, for example, were ready already in 2009.

Clean and refined combustion technology means that Scania manages the very stringent Stage IV and Tier 4 (final) regulations that apply from 2014 without the need for a particulate filter. Scania has many years’ experience of EGR (exhaust gas recirculation) and SCR (selective catalytic reduction) from trucks and buses. Each of the three engine ranges has the same installation dimensions irrespective of emission level. The installation remains unaffected, which significantly reduces the efforts required from OEMs that are active on the global market.

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Customised performance

Important factors in the industrial engine segment are high uptime, generous torque at low revs, good fuel economy and prompt engine response. These demands are all fulfilled with engines from Scania. Scania’s philosophy is to secure full control of all strategic steps in development and performance control. All development is done in-house, including engine manage-ment, fuel injection and emission control. This provides exceptional flexibility in tailoring each installation precisely to its task. Scania can thus ensure that each individual installation meets all demands and targets for performance and fuel economy, as well as for consistent environmental performance, robustness and convenience of operation.

Modular benefits

Scania’s modular philosophy is implemented throughout the engine range. This greatly facilitates servicing, repairs and parts supply, since the engines all share the same cylinder design, featuring for instance separate cylinder heads and replaceable liners and many of the moving parts. If you know one Scania, you know them all, regardless if it is an inline 9- or 13-litre or a 16-litre V8 engine.

Scania EGR and SCR

With EGR (exhaust gas recirculation), a small amount of exhaust gases is returned to the intake of the engine, diluting the intake air and reducing the oxygen concen-tration. This will reduce combustion temperature and emissions of both particulates and NOx. NOx is a generic term for mono- and di-nitrogen oxides (NO and NO2), which are produced during combustion. The main function of the SCR system is to further reduce NOx emissions. SCR is based on the injection of a urea solution (AdBlue or DEF, Diesel Exhaust Fluid) in the exhaust system. Consumption of the urea solution is around 5% of fuel consumption for Stage IV and Tier 4f NOx-levels.

Key characteristics

  • Stage IV and Tier 4f compliance without particulate filter
  • Scania EGR and Scania SCR for emission control (Stage IV and Tier 4f)
  • Common-rail fuel injection Scania XPI (extra high pressure injection) with all-electronic injection control
  • Scania engine management for high-precision control of combustion and after-treatment, as well as easy adaptation to different applications
  • Scania Saver ring in cylinder liner prevents coke build-up at top of piston

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