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High-Speed Data Acquisition Clutch Performance Test System

Date: 4/18/2016 12:00:00 AM


For those vehicles so fitted, the clutch pedal is an important component of the power train, and directly affects the performance of the vehicle. The industry standard QC/T 27-2004 is typically used to assess the overall function as well as clutch durability and reliability characteristics. The price, however, for the equipment needed to perform these tests is high, because of the high accuracy requirements and the ultra-stringent data reliability standards. Maintenance for such high precision equipment is also difficult. The challenge was for a portable, low-cost clutch analysis system that could be used in real-life test environments. 

This system would need to measure and analyze clutch pedal mechanics and location characteristics, time-domain characteristics, and separation actions, thus resolving the shortcomings of the traditional systems that can only perform the tests based on the independent parameters of the clutch or the pedal. A high-speed USB data acquisition module was required in order to perform high-precision tests, and simultaneous multi-parameter test capabilities were required in order to significantly improve test efficiency.


In terms of the clutch characteristic detection test, we use a variety of parameters to analyze the power transmission performance of the clutch pedal being tested, and evaluate whether the pedal complies with the production standards. To maximize ease of installation and removal as well as the convenience of system construction, this system uses Advantech’s USB series high-speed data acquisition module to record the data collected by the pressure and displacement sensors in real-time; the data is used as the basis to analyze the following seven key areas:

  • Maximum resistance during the pedal stroke process.
  • Maximum pedal stroke.
  • Free pedal stroke.
  • Clutch contact point.
  • Clutch synchronization point.
  • Pedal force hysteresis.
  • System efficiency.

System Features

For this project, the USB-4716 data acquisition module was equipped with 16 route 16-bit simulated volume input channels and 8 route DIO channels for a sampling rate of up to 200Ks/S, far higher than the required 100Ks/S. All data was collected using ACP-2020, a 2U rackmount chassis, and AIMB-705, a 6th/7th generation Intel® Core™ i motherboard, to enable data analysis. FPM-7211W was also deployed for visualization and monitoring.

This USB 2.0 high-speed test system can provide substantial data to support clutch design improvements and is a breakthrough from previous models that could only test the characteristic parameters of a single clutch or pedal. This system boasts real-time responses, high scalability, and comprehensive functions. Additionally, the convenience of plug-and-play makes this system a highly flexible product design tool for clutch or transmission manufacturers.