Stage iv / tier 4 final technology
Our entire Tier 4 Final / Stage IV certified engine range maximizes efficiency while delivering the power and reliability our customers demand. We developed a simple Selective Catalytic Reduction (SCR) system together with light Exhaust Gas Recirculation (EGR). The Volvo Penta Tier 4 Final / Stave IV solution means less maintenance for customers, as well as better productivity and uptime. The single canister Volvo Penta solution allows OEMs to optimize their packaging instead of having to design and install two catalysts.
Our technology choice for industrial engines to meet the legislative emission demands outlined in Stage IV/EPA Tier 4 Final is SCR. Together with a light EGR system, the engines stand ready to meet these emission standards with a well-proven technology. 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.
Using proven, smart technology, the rigorously tested engine system meets both the demanding Tier 4 Final (US) and Stage IV (EU) emission reduction requirements and improves fuel efficiency by up to 5%. While most Tier 4 Final engines require a diesel particulate filter (DPF) or a diesel oxidation catalyst (DOC), Volvo Penta’s Stage IV/Tier 4 Final engines use only SCR.
Opting for a SCR solution to meet the Tier 4 Final / Stage IV emission legislation comes with a number of benefits and advantages. Volvo Penta has all the components and hardware available from the factory for the correct installation of the Aftertreatment system. This means that the components are Volvo Penta approved, designed to work with one another and any warrantable claims are simplified.
Utilizing a light EGR system means there is no added cooling need on the package. Our Tier 4 Final engines have the same or lower cooling demand than lower tiered systems. 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. The SCR catalyst is designed for the life of the engine. Under correct operation the catalyst does not need to be replaced or removed for cleaning. The costs for maintenance and downtime are also reduced.
The Environmental Protection Agency (EPA) has established scaled standards to restrict emissions of nitrogen oxides (NOx), carbon monoxide (CO), particulate matter (PM) and non-methane hydrocarbons (NMHC). These standards have been implemented in stages over the last 24 years. The latest and most restrictive EPA standard for stationary diesel engines today is Tier 4 Final, which reduces emissions up to 99 percent compared to previous tiers.Learn More