The latest engines from Cummins Inc., Columbus, Ind., are fully capable of moving forward to meet future Tier 4 emissions requirements as well as meeting Tier 3 requirements. Cummins’ next-generation QSB engines (Circle 925) feature advanced electronics, new sculpted blocks, rear gear trains and high-pressure common-rail fuel systems. The QSB will be available in both four- and six-cylinder platforms. The engines are rated from 110 to 275 hp and are specifically designed to meet the durability, reliability and power density requirements of premium applications such as excavators, material handling equipment and cranes where high performance is essential. Cummins’ in-cylinder emissions solutions have enabled increased performance while meeting regulations without the use of complex turbo-charger arrangements or external hardware such as EGR.