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Development of Simplified Coastdown Method for Road Load Calibration
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English
Abstract
Concerning the road load of the vehicle, there are many discussions about how to measure and how to simulate it on the chassis dynamometer. Also many studies have been done in our laboratory to find out the best solution in aspects of logic, instruments, procedure and reliability.
Our solution resulted in “Simplified Coastdown Method (SCD)” which is featured by the concept of force-based measurement and setting of chassis dynamometer.
This method was proposed to ISO as a candidate for the standard procedure under the support of Society of Automotive Engineers Japan.
In this paper, the method is evaluated by comparing with current coastdown method and wheel torque method. From a practical point of view such as easiness of instruments handling, applicability of the facilities, simplicity of installation and procedure, we have come to a conclusion that the SCD method is the most suitable procedure
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Citation
Morimitsu, N. and Nakagawa, S., "Development of Simplified Coastdown Method for Road Load Calibration," SAE Technical Paper 840471, 1984, https://doi.org/10.4271/840471.Also In
References
- ECE Regulation No.15/04 Annex 4
- OMSAPC Advisory Circular No.55B 1978
- Schurmann D. Johnsson L. Berh W. “Calibration of Chassis Dyanamometers for Emission and Fuel Economy Testing Using Wheel Torque Method” SAE Paper 800400 1980
- Nakagawa S. Shimura K. Morimitsu N. “Road Load Measurement and Setting using Coastdown Method” Jounal of Society of Automotive Engineers of Japan 36 2 1982
- ISO/TC22/SC5 N365 “Japanese technical comment”