Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


SU_2022_Ron_Smith_MSME_Thesis-Fixes.pdf (5.98 MB)

ETD Abstract Container

Abstract Header

Development of a Fault Diagnostics Strategy for Hybrid Electric Components Added in the OSU EcoCAR 4 Vehicle

Smith, Ronald E
http://rave.ohiolink.edu/etdc/view?acc_num=osu1658321445432797

Abstract Details

2022, Master of Science, Ohio State University, Mechanical Engineering.
The electrification of vehicles has rapidly expanded over the past decade. This growth has no end in sight with many automotive companies now promising all vehicles will have some level of electrification within the next decade. An important category of electrified vehicles is hybrid electric vehicles which combine internal combustion engines (ICE) with electric motors for propulsion. Hybrid vehicles have an added level of complexity due to the numerous components that must be added to a standard ICE vehicle to hybridize the vehicle. This makes the importance of developing fault diagnostics for the vehicle even more important to ensure vehicle components do not fail and compromise the performance and safety of the vehicle. The OSU EcoCAR 4 vehicle started as a conventional ICE vehicle and was transformed over a 4-year period into a parallel hybrid electric vehicle. The vehicle architecture is centered around the team integrating a P0 motor referred to as a belted alternator starter (BAS), a P4 motor referred to as a rear electric motor (REM), and a 3.5 kWh energy storage system (ESS). These components are the focus of this research in addition to the inverters for both motors and the DCDC converter. This research focuses on the development of a fault diagnostics strategy for a complex system such as the EcoCAR 4 hybrid electric vehicle. One goal of this research is to outline a strategy that includes fault detection, fault isolation, and fault recovery strategies that are clearly outlined. The culmination of the development of these strategies is a fault diagnostics model that is capable of detecting faults and outputting control actions for applicable vehicle components. These control actions are meant to protect vehicle components from the development of further faults or complete failure. Another goal is to develop a fault diagnostics model that represents all facets of the fault diagnostics strategy, is robust against false triggers, and has the ability to be inserted into the EcoCAR 4 full vehicle model in the future. Various strategies for fault detection, isolation, and recovery are outlined in the literature review. The selected strategies for this research then have the engineering methodology outlined in great detail with a clear workflow established for the overall fault diagnostics strategy. Finally, the fault diagnostics model is created and tested to ensure that the model does not suffer from false triggers and responds to faults as expected. The work completed in this thesis culminated in the creation of a fault diagnostics strategy that covers all intended facets of fault diagnostics with clear steps for replication of said strategy. The final fault diagnostics model performed as intended when tested with vehicle data and was structured so that it is easily implementable into the EcoCAR 4 full vehicle model. This allows for higher fidelity testing of the model moving into the future. This model is also structured so that the development of additional faults and revised control actions can be easily inserted into said model.
Giorgio Rizzoni (Committee Member)
Shawn Midlam-Mohler (Advisor)
129 p.
Automotive Engineering; Mechanical Engineering

Recommended Citations

Citations

  • Smith, R. E. (2022). Development of a Fault Diagnostics Strategy for Hybrid Electric Components Added in the OSU EcoCAR 4 Vehicle [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1658321445432797

    APA Style (7th edition)

  • Smith, Ronald. Development of a Fault Diagnostics Strategy for Hybrid Electric Components Added in the OSU EcoCAR 4 Vehicle. 2022. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1658321445432797.

    MLA Style (8th edition)

  • Smith, Ronald. "Development of a Fault Diagnostics Strategy for Hybrid Electric Components Added in the OSU EcoCAR 4 Vehicle." Master's thesis, Ohio State University, 2022. http://rave.ohiolink.edu/etdc/view?acc_num=osu1658321445432797

    Chicago Manual of Style (17th edition)

osu1658321445432797
118
© 2022, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.