On-cycle emissions and fuel economy for MY2025

John  Kasab, AVL Powertrain Engineering Inc.

AVL Powertrain Engineering Inc. is executing an internally funded research and development program to find cost-effective design solutions to meet MY2025 CAFE and greenhouse gas targets as well as SULEV 30 or Tier 3 bin 30 criteria pollutant standards. Program efforts, focused on the premium SUV segment, include setting vehicle performance requirements; preparing a technology roadmap; and modeling on-cycle emissions and fuel economy to examine the vehicle and powertrain design space, including a light-duty diesel engine.

AVL has been using real-time simulation tools for this evaluation, including AVL CRUISE™ and AVL CRUISE M™. These tools support evaluating the engine, aftertreatment system, and other vehicle systems on the relevant drive cycles, such as FTP75, HWFET, and US06, within a reasonable run time. The technology roadmap was used to identify key future technologies to evaluate for their effects on fuel economy and emissions. A design of experiments approach was used to screen these technologies singly and in combination to determine what technology packages would be worth investigating further.

This paper will describe the modeled baseline vehicle, the future design space for the target vehicle, and the results from the design space evaluation. The performance of the future vehicle concepts will be presented. Lessons learned from the study will also be discussed along with next steps for the program.

Co-authors: Clarence Mulenga, Jennifer Vaughn, Praveen Rastogi, and Greg Heimann.

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