Aftertreatment comes with CHALLENGING DIAGNOSIS

Diagnosing engine and aftertreatment systems is forcing design teams to look at new ways to diagnose problems over long vehicle lifetimes.

Regulations including U.S. EPA Tier 4 have altered design concepts, ramping up the importance of monitoring fuel usage and emissions. Engines and aftertreatment systems must remain in compliance over vehicle lifetimes, forcing designers to employ a range of diagnostic techniques.

Adding aftertreatment systems brings a major change in the way engines are monitored. Systems that used to tell operators about engine issues must now watch aftertreatment systems. Though an additional system is being monitored, operators don't want to get any more alerts.