Volvo Penta Shows Stage 5 Emissions Concept

Volvo Penta's D11 engine, TAD1180-1182VE, offers power output ranging from 320 to 388 hp and is equipped with all the key features of Volvo Penta’s Stage 5 concept, such as a common-rail injection system, uncooled EGR, as well as an EPG and inlet throttle.

As with previous emission steps, Volvo Penta’s Stage 5 line-up includes all five engines – D5, D8, D11, D13, and D16 – offering the same power range from 143-770 hp as Volvo Penta’s existing offer for industrial, off-road applications. A D11 engine and its matched exhaust aftertreatment system (EATS) are on display to demonstrate the company’s Stage 5 platform.

Stage 5 regulations are scheduled to take effect in January 2019 in Europe, requiring new emission limits for diesel and spark-ignited engines used in a variety of industrial applications. The scope of the regulations is set to widen, as for the first time, engines below 19 kW and above 560 kW will be included in the legislation. And while current Stage 5 regulations limit the overall mass of particle emissions, Stage 5 will also affect the number of particles emitted.

Volvo Penta said its new Stage 5 platform has been optimized to meet the upcoming emission standards, as well as future customer needs. Volvo Penta said it has taken advantage of proven and mature concepts already existing today across the Volvo Group, and has listened closely to customers to understand their future application requirements.

“With our Stage 5 range, we are focused on delivering an ideal solution for the customer’s actual environment – a solution that is fit for use and will enable our customers to be leading in their respective markets and segments,” said Johan Carlsson, chief technology officer for Volvo Penta.

The new Stage 5 range is designed to ensure installation commonality between different emission levels. The engine program will be consistent, from Stage 2 to Stage 5.

“We are ensuring compatibility with earlier emissions legislations by using the same hardware layout and re-using the electrical architecture to make sure we have consistency across different emission stages,” said Carlsson. “This means our customers can integrate solutions from across the emission stages at the same time.

“With our Stage 5 solution, we have continued to cultivate the successful design philosophy used for our current Stage 4/Tier 4 final range, keeping the highest focus on maximized uptime, minimized fuel consumption and ease of installation, operation and maintenance.”

Designed with ease in mind, Volvo Penta offers a complete system, where the engine and EATS work together in harmony. High efficiency in the EATS has enabled Volvo Penta to deliver reduced complexity of the engine. The end result is that the technology across the Stage V range is optimized for ideal use.

For Stage 5, the engine has been equipped with a fixed geometry turbo, which contributes to reduced complexity, improved fuel consumption and increased efficiency. A common-rail injection system reduces noise levels and delivers reduced fuel consumption.

Volvo Penta has selected to use uncooled exhaust gas recirculation (EGR), which delivers highly effective heat management for the engine. An electrical exhaust pressure governor (EPG) and inlet throttle enable 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 EATS. Low heat rejection from the complete system means that less cooling is required. This powerful combination leads to increased efficiency and uptime for the operator.

Volvo Penta’s Stage 5 engine and EATS are designed to work together to maximize passive regeneration during normal operation. If needed, the engine-mounted heat management devices will automatically increase the exhaust temperature. The highly efficient selective catalytic reduction (SCR) technology enables the usage of a low complexity engine with robust design. Additionally, the engine concept ensures that it is easy for the EATS to maintain a favorable temperature during normal operation.

With Volvo Penta’s Stage 5 approach, the company said 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 diesel particulate filter (DPF).

On display at ConExpo-Con/AGG is the new EU Stage 5 D11, TAD1180-1182VE. With power output ranging from 320 to 388 hp, the D11 is designed to deliver maximum power and torque at low rpm, the company said. This results in optimized performance, including smooth operation, low noise, and world-class fuel efficiency. The D11 is equipped with all the key features of Volvo Penta’s Stage 5 concept, such as a common-rail injection system, uncooled EGR, as well as an EPG and inlet throttle.