Volvo Penta is revealing a new 8-liter diesel engine with aftertreatment system as the next model in its EU Stage V range. It is part of the full spectrum of Stage V D5, D8, D11, D13 and D16 engines, offering a power range from 105 to 565 kW (143-770 hp).
The 8-liter off-road industrial diesel engine by Volvo Penta has a power output of up to 235 kW. The Stage V version of this engine, TAD880-883VE, is compact and has a perfectly matched exhaust aftertreatment system, to meet new EU Stage V emissions regulations. It has been developed for the future needs of customers and offers world class fuel efficiency with maximized uptime via the optimized regeneration strategy.
“With Stage V regulations approaching we are continuing to move forward with our solution,” says Johan Carlsson, chief technology officer for Volvo Penta. “Our Stage V concept is designed for customers to reap the benefits of the combination of an 8-liter engine which reduces fuel consumption and an exhaust aftertreatement system that minimizes emissions. The solution is easy to install, easy to operate and easy to maintain. It is optimized for our customers’ future needs.”
Stage V regulations for Europe will be implemented in 2019, requiring new emission limits for diesel and spark-ignited engines. The scope of the legislation is set to widen as engines below 19 kW and above 560 kW will be regulated for the first time. And while current Stage IV regulations limit the overall mass of particle emissions, Stage V will also constrain the number of particles emitted.
Complete system with flexibility for customers
The new D8 Stage V engine is powerful and reliable and has been equipped with a fixed geometry turbo which contributes to reduced complexity. It achieves excellent fuel economy thanks to its efficient common rail injection, and has a power output of 160-235 kW. Maximum power and torque are available at low rpm, and the robust engine provides low noise.
The air inlet throttle, together with the uncooled exhaust gas recirculation (EGR), and the electrical exhaust pressure governor (EPG) deliver highly effective heat management of the engine. This enables the system to function without the need to inject fuel into the exhaust stream to raise the temperature.
With this approach, the exhaust gas has an optimal temperature when it passes through the exhaust aftertreatment system (EATS). Low heat rejection from the complete system means that less cooling is required.
A perfectly matched aftertreatment system
The new engine and complementary exhaust aftertreatment system (EATS) work in harmony to comply with forthcoming EU Stage V emissions standards.
The EATS includes the following components: Diesel Oxidation Catalyst (DOC); Diesel Particulate Filter (DPF); Diesel Exhaust Fluid (DEF)/AdBlue® injection; Selective Catalytic Reduction (SCR); and Ammonia Slip Catalyst (ASC).
Carlsson adds: “With a common engine platform and high installation flexibility of the exhaust aftertreatment system, our Stage V solution provides ease of installation for our customers. The engine interfaces, the electrical architecture and the wide range of options that can be chosen with our engines are compatible across different emissions levels, minimizing the need of redesign of the machines for our customers regardless of where in the world they are shipping their equipment. This helps OEMs and operators move forward to the new regulations as smoothly as possible.”
Best in class regeneration strategy
Volvo Penta’s Stage V engine and EATS are designed to work together to maximize passive regeneration during normal operation. With Volvo Penta’s Stage V approach, there is no high-temperature regeneration due to the fact that sulfur regeneration in the SCR catalyst is not required; only soot regeneration is needed to clean the DPF. No additional fuel injector (7th injector) for sulfur regeneration is needed. This leads to increased fuel efficiency and uptime for operators.
“With our EATS solution, there is no need for daily stand-still regeneration,” says Carlsson. “Passive regeneration enables increased efficiency and maximizes uptime for customers. This has been a major driver in our product development in order to provide a solution that helps maximize productivity for the end-users of our products in all the different applications where they operate.”