Enhancing the already efficient V8 Euro 6 aftertreatment system was no small responsibility, but that was Eric Ridström’s role in the development of the new V8 engine. The challenge was to fit what amounts to a mini chemical factory into a very small container with very specific requirements.
After having grown up in his father’s engine workshop surrounded by American V8 engines, Eric Ridström knows the ins and outs of V8s – as well as other engine types, of course. He’s a proud member of the V8 team, and says he likes the challenges a V8 engine puts on the exhaust gas aftertreatment system.
“The gas flow through a V8 engine is enormous, and we need to let it pass the aftertreatment system with as little resistance as possible,” Ridström says. “We strive to use surfaces, catalysts and particulate filters in the system optimally.”
Euro 6 aftertreatment systems
Ridström has enjoyed working with the V8 team and suppliers to develop an efficient exhaust gas aftertreatment system meeting all the targets, including emission levels, fuel consumption, cost and weight as well as production and service aspects. His responsibilities, among others, were to set goals, plan, manage requirements and follow up on any deviations during the development and industrialisation. “Then came the challenge of fitting this very complex chemical process into a container small enough to fit on the truck’s frame while at the same time ensuring it could withstand harsh weather and road conditions and dramatic changes in temperature,” he recalls.
Ridström started as object manager for the V8 aftertreatment system in 2009. Scania’s long experience from Euro 6 aftertreatment systems – with the first generation introduced in 2011 – meant that Ridström and his team could use experience drawn from previous projects and develop a new high-performance product.
The metal canister containing the chemical factory, which keeps emission levels within the required limits, also keeps the noise within limits. The team has worked with parameters such as flow rates and volume tuning to integrate the silencing features needed.