The New General Motors 3.0 Liter Duramax Diesel Inline 6-cylinder Engine for the 2019 Chevrolet Silverado and GMC Sierra

摘要

In 2019 General Motors will introduce for the first time in the Light-Duty Pickup Truck market a new Duramax 3.0-liter 6-cylinder inline diesel engine. This engine has been designed from "clean sheet" paper and specifically developed for the new GM Full-Size Truck platform: it will equip the next generation of Chevrolet Silverado and GMC Sierra as well other vehicles in the future. In order to ensure the best possible in-vehicle integration of the propulsion system in the new platform, a modern "state of the art", very efficient, all-aluminum diesel engine architecture has been selected, breaking through the paradigm of V engines for pickups and adopting the "inline" configuration, very challenging to package but essential to get the highest fuel economy combined with excellent NVH. The paper describes how the engine has been developed to meet the high expectations of North American Pickup customers, including rated power performance and towing capacity as well noise refinement, tougher emissions standards and very stringent On-Board Diagnostics. The key technical features of the base engine thermodynamics and mechanical subsystems, boosting and EGR, controls, and emission reduction technology are extensively described in the paper. Final homologation data show that the new Duramax 3.0-liter 6-cylinder diesel engine meets these requirements with an outstanding in-vehicle segment leader fuel economy and rated power, as well very good noise performance and drivability, thanks also to a new generation automatic 10-speed transmission.