Simulated Real-World Energy Impacts of a Thermally Sensitive Powertrain Considering Viscous Losses and Enrichment (Presentation) [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 629.22 Types of vehicles
• Thông tin xuất bản: Golden, Colo. : Oak Ridge, Tenn. : National Renewable Energy Laboratory (U.S.) ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2014
• Mô tả vật lý: Size: 32 pp. : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 267097
• Chủ đề: 1. 33 advanced propulsion systems; 2. Dynamometer testing; 3. Engine cold starts; 4. Powertrain modelingsimulation; 5. Real-world fuel economy

Tóm tắt

It is widely understood that cold-temperature engine operation negatively impacts vehicle fuel use due to a combination of increased friction (high-viscosity engine oil) and temporary enrichment (accelerated catalyst heating). However, relatively little effort has been dedicated to thoroughly quantifying these impacts across a large number of driving cycles and ambient conditions. This work leverages high-quality dynamometer data collected at various ambient conditions to develop a modeling framework for quantifying engine cold-start fuel penalties over a wide array of real-world usage profiles. Additionally, mitigation strategies including energy retention and exhaust heat recovery are explored with benefits quantified for each approach.