Damping Force Characteristic Test of Suspension Struts [JASO C611]

User Benefits

- Damping force characteristic tests on suspension struts can be performed based on the JASO C611 standard. - Combination test enables automatic speed change and measurement. - High responsiveness of the EMT series enables testing at high excitation speed.

Introduction

Various components play an important role in achieving a comfortable ride in vehicles. Among them, the suspension strut used in the suspension system is an important component that stabilizes the vehicle body by mitigating the impact caused by uneven road surfaces. “JASO C611 Suspension Struts for Automobiles”, a standard of JASO (Japanese Automotive Standards Organization), established by JSAE, specifies the definition, quality, and test method for suspension struts. There is no international standard that is equivalent to JASO C611. In order to improve the performance of suspension struts, it is necessary to measure the damping force against speed by changing the excitation speed. The performance of suspension struts can be confirmed by measuring the response, such as the relationship between speed and damping force and the Lissajous waveform. This article introduces an example of the test method “Damping Force Characteristic Test” specified in JASO C611, which was conducted on a Shimadzu EMT series electromagnetic fatigue testing machine.

May 26, 2026 GMT