Date of Award
7-23-2024
Publication Type
Thesis
Degree Name
M.A.Sc.
Department
Mechanical, Automotive, and Materials Engineering
Keywords
Fuel Economy;Internal Combustion Engine;Miller Cycle;Thermodynamic Efficiency;Variable Valve Actuation
Supervisor
Xiao Yu
Supervisor
Ming Zheng
Abstract
High-efficiency internal combustion engines are expected to continue powering most automotive vehicles in the foreseeable future. Miller cycle is one of the strategies to increase engine efficiency and, in turn, reduce greenhouse gas emissions. A numerical study based on zero-dimensional simulation was conducted in this thesis to investigate the impact of valve timing on the indicated thermodynamic efficiency of the Miller cycle. The simulation was carried out using commercially available software AVL BOOST. First, the impact of intake valve closing timing on the trapped mass of intake charge and the resultant engine load was investigated. It is observed that advanced or delayed intake valve closing timing could control the engine load. This load control strategy enabled a lower pumping loss with a corresponding improvement of indicated thermodynamic efficiency compared to the conventional throttling technique.
Recommended Citation
Guo, Muyu, "A Thermodynamic Analysis of Intake Valve Actuation in Internal Combustion Engines" (2024). Electronic Theses and Dissertations. 9517.
https://scholar.uwindsor.ca/etd/9517