Meritor Wabco’s SmartTrac automatic trailer lift axle control system is designed to monitor suspension load and manage lift axles for trailers. It is the latest addition to the SmartTrac line of ...

The system combines Nissan’s new Variable Valve Event and Lift (VVEL) and continuous valve timing control (C-VTC) technologies to deliver significantly enhanced performance.

The intake valve lift control system opens the valves only slightly to the “low lift” position, giving the 2.4-liter four-cylinder lump better economy under normal driving.