... low maintenance and fuel efficiency. The ISL incorporates familiar, proven technologies and subsystems: cooled EGR, Cummins patented VG Turbo, High ... Rail fuel injection, and Cummins Particulate Filter. These technologies have been used in Cummins transit bus engines for ... has earned its reputation for reliability and durability. Key technologies like the cooled-EGR subsystem, VG Turbo, and electronic ...