The Volvo SCR system is simple and effective, with few components. It consists of a DEF tank positioned near the standard diesel tank, plus a DEF tank pump, an injector unit and an SCR catalytic converter.
The advantage of using DEF is that it enables the engine to use less EGR -- and higher oxygen levels -- for better combustion, while easily meeting the EPA's near-zero NOx emissions requirement of 0.2 g/hp-hr NOx. By using DEF, we avoid the disadvantages of increasing EGR to massive levels.
This results in better fuel efficiency from your Volvo engine. With rising crude oil prices, achieving maximum fuel efficiency has become the single most important attribute of modern truck engine design.
- Diesel engine optimized for high performance, low particle emissions and low fuel consumption.
- DEF tank.
- The DEF tank and injection system's control units continuously vary the amount of DEF injected in response to the engine's current load conditions.