Citation

Sato S, Yamamoto T, Ogawa Y. Trans. Soc. Automot. Eng. Jpn. 2008; 39(5): 5_163-5_168.

Copyright

(Copyright © 2008, Society of Automotive Engineers of Japan)

DOI

10.11351/jsaeronbun.39.5_163

PMID

unavailable

Abstract

Exhaust emissions from a vehicle under road driving condition is affected by the control state of ECU. This control state highly depends on the driving force of the vehicle. One of the contributing factors to determine the driving force is the hill climbing resistance, and for the evaluation of the resistance, it is necessary to take an accurate measurement of the road gradient. In this study, the measurement methods of the road gradient and the altitude with GPS, gyro sensor and height sensor are reported. The method of road gradient that was estimated from both pitch angle measured by a gyro sensor and vehicle gradient calculated by measured values of height sensors was invented.

Language: ja

Keywords

Altitude; Analysis; Environment/On-board measurement system; Gyro sensor; Road gradient; Road test