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Characterization of Engine and Transmission Lubricants for Electric, Hybrid, and Plug-in Hybrid Vehicles

Gupta, Abhay
http://rave.ohiolink.edu/etdc/view?acc_num=osu1339761347

Abstract Details

2012, Master of Science, Ohio State University, Mechanical Engineering.
With the lubricants operating at different steady state temperature in HEV, EV, and PHEV the optimum oil viscosity for the best vehicle efficiency would differ for every driving mode. The importance of engine and transmission lubricants viscosity on the efficiency of a vehicle in EV, HEV, and PHEV mode was studied in this work.. A Toyota Prius modified for plug-in hybrid operation was used to perform experiments on the chassis dynamometer facility at The Ohio State University. Three different engine and three different transmission lubricants were used in the experiments. Sensors were installed into the vehicle to log the desired data signals using data loggers. Experiments revealed that the lubricants operating temperature was significantly lesser in EV mode as compared to HEV and PHEV mode. A gain of 17% in vehicle efficiency was obtained using a less viscous transmission oil in EV mode over the factory oils. The impact of engine lubricant on vehicle efficiency was higher in HEV mode than PHEV mode. A maximum gain of 11% and 10% was achieved in PHEV and HEV mode respectively with the less viscous transmission oil. Engine oil with typical formulation resulted in slightly better vehicle efficiency than the oil with the with a different friction modifier in both HEV and PHEV modes. An error analysis at a 95% confidence level was done to evaluate error in experiments results.
Giorgio Rizzoni (Advisor)
Shawn Midlam-Mohler (Committee Co-Chair)
Marcello Cannova (Committee Member)
133 p.
Automotive Engineering
Lubricants; Engine Lubricants; Transmission Lubricants; Hybrid Vehicle; Electric Vehicle; Oil; Vehicle Efficiency

Recommended Citations

Citations

  • Gupta, A. (2012). Characterization of Engine and Transmission Lubricants for Electric, Hybrid, and Plug-in Hybrid Vehicles [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1339761347

    APA Style (7th edition)

  • Gupta, Abhay. Characterization of Engine and Transmission Lubricants for Electric, Hybrid, and Plug-in Hybrid Vehicles. 2012. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1339761347.

    MLA Style (8th edition)

  • Gupta, Abhay. "Characterization of Engine and Transmission Lubricants for Electric, Hybrid, and Plug-in Hybrid Vehicles." Master's thesis, Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1339761347

    Chicago Manual of Style (17th edition)

osu1339761347
5,145
© 2012, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.