@article{ref1,
title="Research on measurement method of road gradient and altitude by on-road driving",
journal="Transactions of Society of Automotive Engineers of Japan",
year="2008",
author="Sato, Susumu and Yamamoto, Toshiro and Ogawa, Yasuhiro",
volume="39",
number="5",
pages="5_163-5_168",
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.<p /> <p>Language: ja</p>",
language="ja",
issn="0287-8321",
doi="10.11351/jsaeronbun.39.5_163",
url="http://dx.doi.org/10.11351/jsaeronbun.39.5_163"
}