1998-02-23

Dynamometer Load Reduction for Low Power Vehicles Driving the US06 Supplemental Federal Test Procedure 980405

This report summarizes the development work for the US06 Low Power Vehicle Adjustment (LPVA) algorithm for the Supplemental Federal Test Procedure (SFTP). The algorithm is integrated into the control software of a 48 inch (1219 mm) single roll electric dynamometer, and temporarily assists vehicles by reducing the road load. To qualify for assistance, vehicles must accumulate 7 seconds of wide-open-throttle (WOT) within any of five prescribed windows of time during the US06 test. WOT is defined as 85-100% of the vehicle's throttle position sensor (TPS) output. The assistance continues until the TPS signal falls below the 85% criterion. The assistance typically lasts 1 second before WOT is relieved and yields approximately 8 seconds of total WOT condition.
The LPVA algorithm has been successfully tested on a number of vehicles with a range of data acquisition rates. The LPVA algorithm, when activated, decreases the time at WOT for a low power vehicle and allows the vehicle to return to the drive trace. The design criteria of 8-second WOT, 85% TPS, and five prescribed acceleration windows were included in the Environmental Protection Agency (EPA) SFTP Final Rulemaking [1].

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
STANDARD

Operational Sound Level Measurement Procedure for Snowmobiles

J1161_201711

View Details

TECHNICAL PAPER

Correlation between Batch (Bag) and Continuous Sampling for N2O Measurement in Diluted Exhaust from Light-Duty Vehicles

2015-01-1993

View Details

STANDARD

Measurement Procedure for Determination of Silencer Effectiveness in Reducing Engine Intake or Exhaust Sound Level

J1207_201405

View Details

X