Equivalent Drive Cycle Analysis, Simulation, and Testing - Wayne State University's On-Road Route for EcoCAR2 Wayne State University

Format:

Conference/Event

Author/Creator:

Snyder, Snyder, author.

Contributor:

Ku, Jerry

Conference Name:

SAE 2013 World Congress & Exhibition (2013-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2013

Summary:

The Wayne State University (WSU) EcoCAR2 student team isparticipating in a design competition for the conversion of a 2013Chevrolet Malibu into a plug-in hybrid. The team created arepeatable on-road test drive route using local public roads nearthe university that would be of similar velocity ranges containedin the EcoCAR2 4-Cycle Drive Schedule - a weighted combination offour different EPA-based drive cycles (US06 split into city andhighway portions, all of the HWFET, first 505 seconds portion ofUDDS).The primary purpose of the team's local on-road route was tobe suitable for testing the team's added hybrid components andcontrol strategy for minimizing petroleum consumption and tail pipeemissions. Comparison analysis of velocities was performed betweenseven local routes and the EcoCAR2 4-Cycle Drive Schedule. Three ofthe seven local routes had acceptable equivalence for velocity (R₂ 0.80) and the team selected one of them to be the on-road testdrive route.The secondary purpose was to explore various approaches forevaluating route equivalence. The EcoCAR2 organizers will createthe competition's private track equivalent route approximationof the EcoCAR2 4-Cycle Drive Schedule, but this has not been sharedwith the teams, so the team was not able to evaluate theequivalence of the competition route. The team was successful inevaluating equivalence across various approaches for the team'slocal routes. However, the local route analysis showed thatacceleration and average accel/decel had some of the worseequivalence results.Drive cycle data was analyzed to compare accelerationequivalence, city/highway driving mix, average accel/decel, totalroad load energy, and simulations were performed for fuelconsumption. Simulations were done due to the team's lack ofchassis dyno test data for the EcoCAR2 4-Cycle Drive Schedule andthe EPA does not publish data for individual drive cycles orportions of them. The team has not yet been able to do any testingon a chassis dynamometer or a private track, so local public roadtesting was the only test data available. A Driver's Aid forfollowing a drive cycle trace would greatly help improveequivalence for vehicle velocity and acceleration

Notes:

Vendor supplied data

Publisher Number:

2013-01-0549

Access Restriction:

Restricted for use by site license