NVH Considerations to Make Modern Diesel Engines an Attractive Alternative for SUV Powertrains

This paper will highlight the criteria and development efforts which have to be considered when planning to launch a SUV (Sports Utility Vehicle) or LDT (Light Duty Truck) equipped with a diesel engine. Basic engine design aspects as well as the choice and calibration of diesel fuel injection equipment will be discussed. Since the vibration excitation of the diesel engine is significantly higher than that of a comparable gasoline engine, the engine mounting arrangement is extremely important to guarantee good vibration isolation. Gear ratios have to be matched to the different torque and speed characteristics of the diesel engine. Finally, refinement of the complete vehicle with regard to interior and exterior noise is required.