Automobile three-pedal performance test scheme

System introduction

The GA-13 automobile clutch pedal performance test system is an intelligent automobile pedal test equipment independently developed and developed based on pedal stroke calculation, which can realize the test of the stroke trajectory and pedal force of the clutch pedal of various types of vehicles. The instrument adopts the data acquisition system as the main control core, selects the imported pedal force sensor and rotation angle sensor as the main test components, transmits data through the CAN bus interface, and is equipped with professional operating software, which can be displayed and saved on the host computer in real time.

The system conforms to the ergonomic mechanical structure of automobiles, and the whole inspection process is convenient and fast. It is an ideal testing equipment for automobile manufacturing industry, automobile maintenance industry, automobile testing and scientific research departments.


System range and accuracy

The main technical parameters
No.DescriptionTest Rangeprecision
Test stroke0~250mm
2Pedal forc0~500N0.1%FS

Note: 1. The sensor range can be customized; 2. The actual test accuracy will vary depending on the sensor range.

System Features

  • The complete system is easy to install and easy to use

  • Windows Chinese operation interface setting and analysis software, easy to use

  • Various measurements or collected data can be displayed in real time

  • The system components and wiring harness are connected reasonably and are easy to use

  • Various test conditions can be set for testing according to requirements

  • High precision, high reliability, high vibration resistance and shock resistance ensure test quality

  • The system has a high degree of scalability, which can be extended to connect to various other sensors or test systems

Pedal fixing bracket

1. The principle of fixing



Options for pedal displacement measurement

1. Measurement principle


As shown in the figure, the measurement module composed of an angle sensor and a linear displacement sensor can measure the space vector curve data in real time. The system adopts the relative quantity calculation method (before measurement, the system automatically resets to zero), so the test result has nothing to do with the installation position of the sensor. It is only necessary to ensure that the sensor arrangement plane is consistent with the pedal trajectory plane.

During the test, the data acquisition system obtains the angle and displacement change in real time, and sends it to the host computer for data calculation and display.

The data acquisition system collects the pedal variation information in real time and point by point, and finally obtains the pedal motion trajectory through calculation.

System software



Test items

When this device is used for vehicle pedal test, it can record the process of stepping on the pedal in real time, and automatically store the pedal force-travel curve data. The system software automatically analyzes key points according to the data collected by the test, and the calculation results can directly generate report documents.

Generally speaking, the curve data recorded during the pedaling process is divided into upper curve and lower curve. This is due to the internal damping of the pedal system, which causes the two curves to not coincide, that is, pedal hysteresis.

1. Clutch pedal










Key points and parameters
  • Pedal stroke [T]

  • Pedal process idle travel point [F]

  • Pedal process maximum force point [M]

  • Clutch disengagement point [D]

  • Pedal process minimum force value point [D0]

  • The maximum stroke point of the pedal, the abscissa of which is the pedal stroke from the pedal mechanism to the limit point []

  • Pedal return minimum force value point [L]

  • Clutch engagement point [E]

  • Clutch flameout point [S]

  • Pedal force maximum hysteresis【】

2. Accelerator pedal

Test legend汽车三踏板性能测试3.jpg
key parameter
  • Maximum accelerator pedal travel

  • Trigger accelerator pedal force

  • Maximum accelerator pedal force

  • 50% opening accelerator pedal force

  • 50% opening acceleration gradient

  • 50% opening oil recovery gradient

  • 50% opening pedal force hysteresis

3、Brake pedal

Test legend汽车三踏板性能测试4.jpg
key parameter
  • Maximum brake pedal travel

  • Trigger brake pedal force

  • maximum brake pedal force

  • 20% pedal force

  • Pedal travel at 20% pedal force

  • 20% pedal force gradient

  • 20% pedal force hysteresis

  • 50% pedal force

  • Pedal travel at 50% pedal force

  • 50% pedal force gradient

  • 50% pedal force hysteresis

  • 80% pedal force

  • Pedal travel at 80% pedal force

  • 80% pedal force gradient

  • 80% pedal force hysteresis

Configuration and accompanying item list

serial numberNameQtyFunctionSpecificationRemarks
Basic module

Equipment fixing tooling

1 set

Used to fix the measurement system to meet the needs of each test

Type: Integral bracket tooling (displacement solution)

Installation method: meet the installation method that does not damage any parts under the design state of the whole vehicle

Test object: The test of the force and stroke of the parking brake operation (handbrake) system and the brake pedal can be completed under the design state of the whole vehicle

Carrying method: mass ≤5Kg, portable

Tooling can be customized
2Data acquisition system1 set

Connect the sensor for communication and data collection, analyze and process the collected data, and output the collected data

Operating temperature range: ‐10~+55 ℃ Power supply overvoltage protection: ≥24V

Analog signal channel: ≥4 channels (external modules can be connected);

Measurement type: voltage, current, bridge, strain sensor;

Resolution: ≥16 bits;

Sampling frequency: ≥1000Hz.

Brand and specification optional


Pedal Force Measurement Module

1 set

For vehicle pedal force information measurement

Measuring range: 0~1000N

Accuracy: ≤0.5% F.S

Working temperature: ‐10~55℃

Maximum overload: ≥150%

Signal line: ≥3m

Easy to assemble and disassemble, stable installation, does not affect normal driving after installation, can be used alone

Brand and specification optional

Pedal force display1

Real-time display and storage of data without connecting data acquisition systems and laptops

Power supply: 9‐12V DC

Output signal: 4‐20mA or 1‐9mA

Cable length: 3m

Brand and specification optional

System software-

Realize the collection of test data

Solve, dynamically display, and archive real-time acquired data

Curve properties can be arbitrarily defined

The software provides zero point correction function to ensure test accuracy

Highly scalable. Through software settings, it can be connected to various test systems and sensors

Synchronous sampling of defined channels

Full Chinese interface

Support data statistical analysis

No user node constraints

Displacement settlement measurement module
1Angular displacement sensor2只

It is used to measure the rotation angle of the pedal measurement arm, and the final solution is the displacement.

Type: Potentiometer Type

Measuring range: 0°~300°

Independent linearity:<0.1%

Repeatability: ≤0.01%

2Linear displacement sensor1

Used to measure the displacement of the pedal in the stretching direction

Structural form: potentiometer type

Measuring range: ≥200mm

Independent linearity:<0.1%

Working temperature: ‐20~80℃

Signal line: ≥2m

Other optional modules

Handbrake force measurement module


Can measure handbrake force, handbrake rotation angle

Measuring range: 0~1000N

Accuracy: ≤1% F.S

Working temperature: ‐20~55℃

Maximum overload: ≥150%

Signal line: ≥3m

Two models are available (whether angle can be measured).

2Handbrake force display number1

Real-time display and storage of handbrake test (force and angle) data without connecting a data acquisition system and a laptop

Number of channels: 2

Power supply: 9‐12V DC

Output signal: 4‐20mA or 1‐9mA

Cable length: 3m

Single and dual channel available


Brake Line Pressure Measurement Module


It can test the pipeline pressure of two main oil circuits and four branch oil circuits

Pressure range: 100‐1000mbar

Overpressure: 150%FS

Excitation: 5V DC


Repeatability: 0.05%FS

Response time:<20ms

Long-term stability: ±0.1%FS/year

1Accessories and packing boxes1 set

Effectively store and protect the test test system, easy to carry.

200KG compressive capacity



Note: 1. The * mark indicates the necessary configuration. 2. The sensor specifications are recommended indicators. For more accurate indicators, please refer to the specific brand sensor specifications.


ContentPhysical mapIllustrate

Installation and fixing of pedal force sensor


The lightest and thinnest pedal force ensures high-quality test results.

Various types of fixtures can be customized for different pedal types (free of charge).

The displacement measurement point defaults to the center of the pedal plane.

Lateral space for pedal fixing support fixture


The pedal clamp installation can be adjusted up and down, and the fixed state does not interfere with the tester's legs.

Pedal fixing support fixture looking down space


The pedal fixture installation can be adjusted left and right, and the measuring arm (mechanism) does not interfere with the tester's legs during the test.

The equipment mainly meets the standard

This test system is used to test the pedal operation force and stroke of automobiles, and can meet the test requirements of the following national standards:

  • GB 7258-2012 Technical conditions for motor vehicle operation safety

  • GB 21670-2008 Technical requirements and test methods for passenger car braking systems

  • GB 12676-1999 Structure, performance and test method of automobile braking system

  • GB 12543-1990 Automobile acceleration performance

Introduction of electrical components

1. Data acquisition instrument

Tooling and Dimensions汽车三踏板性能5.jpg
Electrical connection汽车三踏板性能6.jpg

Widely used in the measurement of CAN fieldbus analog signals

Up to 10kHz sample rate per channel

State-of-the-art 4x32-point indexing table for nonlinear sensor characteristic curves (ADMM 4 pro HS)

Available in 4 bipolar acquisition channel specifications, selectable input voltage, and protected with 500 volt electrical isolation

Multiple ranges from 10mV to 60V are available, and each channel can be individually configured

High-precision setting of sensor excitation, suitable for connecting various resistive sensors to work

Wide operating temperature range: -40°C to 125°C

The sturdy aluminum metal shell design has the highest international standard of moisture and dust resistance: IP67

Each acquisition channel is individually equipped with an LED display light to effectively monitor its working status

Brand and originCSM (Germany)
key parameter

Input information measurement range: ±10mV~±60V

Sensor excitation: ±5V~±15V

Resolution display range: 16Bit

Sampling frequency (single channel): 10K Hz

Overvoltage Protection: ±100V, ESD Protection

Signal Filtering: 6th order Butterworth filter, 0.1-2K Hz cutoff frequency

Non-linear scale: 32 points

Working voltage: 5V-60V DC

Weight: 300g

Working temperature: ‐40~125℃

Moisture class: IP67

ApplicationSensor data collection

Pedal force sensor

Sensor appearance汽车三踏板性能7.jpg
Tooling and Dimensions汽车三踏板性能8.jpg

High-precision test indicators. Nonlinearity<0.05%

Ultra light weight

Ultra-thin geometry, compact and high-strength design

multifunctional fixture

Various sizes of pedal force tests are possible

Brand and originInterface (US)
key parameter

Measuring range: 200~2000N (the range can be customized)

Weight: 250g

Accuracy: ≤0.05% F.S

Repeatability: ≤0.02% F.S

Sensitivity: 2mV/V

Zero offset: ±1%RO

Maximum supply voltage: 15VDC

Recommended supply voltage: 10VDC

Working temperature: ‐55~90℃

Maximum overload: ≥150%

Signal line: 3m

ApplicationVehicle pedal force parameter test

Angle sensor

Sensor appearance汽车三踏板性能9.jpg
Tooling and Dimensions汽车三踏板性能10.jpg

Industrial product standard size

Long service life: >10 million times

Excellent linearity: ±0.075%

High resolution, better than 0.008°

The maximum speed allowed is 10000 rpm

Unlimited continuous spin

Brand and originNovotechnic (Germany)
key parameter

Mechanical stroke: 360° continuous

Maximum speed: 10000 R/min

Working range: 350 ±2°

Repeatability: ≤0.002%

Independent linearity: ±0.075%

Maximum working voltage: 42V

Seismic index: 5-2000Hz

Working temperature: ‐40~100℃

ApplicationPedal stroke angle information measurement

Motion detector

Sensor appearance汽车三踏板性能11.jpg
Working range parameters汽车三踏板性能12.jpg

The output signal can be customized

Long life: 2 million times

High linear accuracy

Connection: high strength cable (standard length 1M)

Protection: IP65

Brand and originNovotechnic (Germany)
Key parameter

Compact body: 16mm

Output signal: voltage

Electrical stroke: 25‐300mm

Accuracy: 0.05% comprehensive)  Life: 50 million times

Working temperature: -40℃ - 85℃

Reciprocating speed: 5 m/s

Protection class: IP 67

ApplicationPedal track travel information measurement

Handbrake force sensor

Sensor appearance汽车三踏板性能13.jpg
Tooling and Dimensions汽车三踏板性能14.jpg

Ultra-thin structure design, as close as possible to the actual handbrake force measurement

Convenient and practical. Simultaneous testing of handbrake angle

First-class company products, strict engineering testing

Brand and originFGP (France)
Key parameter

Measuring range: 50~1000LBF

Accuracy: ≤0.03% F.S

Sensitivity: 1.5mV/V

Zero offset: ±5%RO

Recommended supply voltage: 10VDC

Working temperature: ‐55~90℃

Maximum overload: ≥150%

ApplicationParking handle force measurement