Our technology choice for industrial engines to meet the legislative demands covered in Stage IV/EPA Tier 4 Final is SCR (Selective Catalytic Reduction). Together with a light EGR (Exhaust Gas Recirculation) system, the engines stand ready to meet these emission standards with a well-proven technology. The Volvo Penta SCR solution means less maintenance and upkeep for customers, as well as better productivity and uptime and lower maintenance costs.
Emissions are reduced by means of SCR technology. There are many ways to build an SCR system. At Volvo Penta, we’ve kept our SCR as simple and reliable as possible. While others have chosen more complex installations and C-EGR (cooled exhaust gas recirculation) systems – we use only two parts: SCR and light EGR. The benefits are obvious: the fewer components used, the easier the installation will be and the less risk of part failure or system malfunction.
Together with the EGR for optimization of the exhaust gas temperature, the engines fulfill environmental standards. Using proven, smart technology, the rigorously tested engine system meets both the demanding Stage IV (EU) and Tier 4 Final (US) emission reduction requirements and improves fuel efficiency by up to 5%. While most Stage IV/Tier 4 Final engines require a DPF (diesel particulate filter) or a DOC (diesel oxidation catalyst), Volvo Penta’s Stage IV/Tier 4 Final engines use only SCR.
Opting for a SCR soluton to meet the Stage IV/Tier 4 Final emission legislation, comes with a number of benefits and advantages.
An engine with the Volvo SCR system has the same – or lower – cooling demand than one without SCR. Lower cooling demands translates to lower noise levels and minimized costs for the radiator package. This enables manufacturers to house the cooling system in installations where space is limited.
The Volvo Advanced Combustion Technology and the SCR system turn more fuel energy into mechanical power – which leads to less heat rejection – meaning that the power output can be maximized for any given engine displacement. The result is smaller engine sizes, reduced costs, and simplified installations.
For the end users, the principal benefits of the SCR engines start with unsurpassed fuel efficiency that cuts operating costs. With the SCR system, where the catalytic converter is designed to last the life of the engine, costs for maintenance and downtime are also reduced.