Evaluation of Noise, Vibration, and HarshnessOptimized Cylinder Deactivation on a Class 8 Diesel Truck with Impact on Emissions and Fuel Consumption: A Development of Strategy to Reduce Emissions and Fuel Consumption with Cylinder Deactivation While Providing an Acceptable Cabin Environment Cummins Incorporated

Format:

Book

Conference/Event

Author/Creator:

Baltrucki, Justin, author.

Contributor:

Janak, Robb

Matheaus, Andrew Charles

Conference Name:

Automotive Technical Papers (2025-01-01 : Warrendale, Pennsylvania, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2025

Summary:

Anticipated NOX emission standards will require that selective catalytic reduction (SCR) systems sustain exhaust temperatures of 200°C or higher for effective conversion performance. Maintaining these temperatures becomes challenging during low-load conditions such as idling, deceleration, and coasting, which lower exhaust heat and must be addressed in both regulatory test cycles and day-to-day operation. Cylinder deactivation (CDA) has proven effective in elevating exhaust temperatures while also reducing fuel consumption. This study investigates a flexible 6-cylinder CDA system capable of operating across any combination of fixed firing modes and dynamic skip-firing patterns, where cylinders transition between activation states nearly cycle-by-cycle. This operational flexibility extends the CDA usable range beyond prior implementations. Data was primarily collected from a test cell engine equipped with the dynamic CDA system, while a matching engine in a 2018 long-haul sleeper cab served to identify firing patterns that minimize noise, vibration, and harshness (NVH). These patterns were subsequently validated under controlled conditions. Results showed a broader deactivation operating range and enhanced NVH characteristics. Despite accommodations for real-world NVH constraints, the flexible system delivered NOX and fuel efficiency benefits comparable to those achieved by previous work performed on this engine

Notes:

Vendor supplied data

Publisher Number:

2025-01-5074

Access Restriction:

Restricted for use by site license