brake & friction test systems - en

Brake & Friction Test Systems

As a multi-faceted engineering developer and comprehensive manufacturer, Link is able to provide fully integrated test systems for the evaluation of brake and friction material. Our test equipment provides measurement from simple components to corner modules and full vehicle systems. Link works with all aspects of braking systems including; boosters, master cylinders, ABS modules, calipers, rotors, brake pads, steel backs, insulators, friction ingredients, brake drums and assemblies. Link’s broad array of test systems provide for diverse testing applications including durability, performance and NVH.Link also provides data acquisition systems for vehicle testing of brake and friction. Link’s easy-to-use software reporting module is identical for both laboratory and vehicle test data.

Friction characterization test systems have a dual-purpose function, in which they can be used for quality inspection or for material development. For the purpose of objective quality inspection, these machines are utilized to evaluate acceptable product tolerances and consistency in part production. With respect to material development, these machines are precisely utilized to evaluate frictional properties and raw material characteristics.

Some common friction material characterization test stands include:• Friction Compressibility Test Stand • Chase Friction Material Test System • Friction Assessment & Screening Test Stand (FAST) • Friction Shear Machine

Measurement systems and mechanical assemblies are engineered to eliminate potential sources of test variability. Typical test measurements include compressibility and coefficient of friction and may be expanded further to include thermal and wear characteristics.

Friction Characterization

The Model 1620 Compressibility Test Machine provides a complete workstation to evaluate the compressibility of friction materials at ambient and elevated temperatures up to 600°C.

The test stand is manufactured in compliance with NFPA and CE standards and features enhancements to conform with world wide testing requirements. Typical materials tested on this machine include: disc and drum brake linings, wet friction and transmission materials, noise insulators, and gaskets.

Friction Characterization Featured Product

Model 1620 System Features:

Control System: ProLink Software

Stand alone desktop workstation

Global acceptance and compatibility

Accommodates full range of passenger and light truck pads

Automated operation, data analysis, and reporting

Standard calibration fixture to assure mea-surement precision and repeatability

Runs compression, swell/growth and combined test

Records change of temperature over time

Compressibility Machine

Link manufactures customized brake & friction test stands used to recreate vehicle subsystem functions within a laboratory environment. Typical test stand capabilities include durability, life cycling, NVH, performance development, sample verification and quality checks.

The test stands developed by Link have been proven through years of performance at customer sites and within our own testing laboratories. Additionally our software control program can be easily modified to meet requirements for data recording and real-time display. Strain gauges, thermocouples, NVH sensors and other measurement devices are utilized to capture the necessary data.

Some of the more common brake & friction test stands developed by Link include:• Master Cylinder Brake Booster Test Stand - Simulates braking applications to record and analyze

performance and NVH characteristics • Caliper Test Stand - Performs cyclical applies to measure part durability and performance• Rotor Mapping Station - Measures and records disc thickness variation• Residual Drag & DTV - Measures and records residual brake drag

Test Stands

Test Stands

Model 3394 System Features:


Stainless Steel Bench

Linear Actuation for Force or Stroke Ap-plications

Spring Consumers with User-Defined Stiffness for Caliper Simulation

Panel Mounted Gauges for High Visibility

Panel Mounted Supply Connections

Control Desk

Optional Full Anechoic Chamber & Noise Acquisition System

Designed to comply to OEM and industry standard procedures

Booster Test Stand Performance/NVH

The Model 3394 Booster Test Stand is specifically configured to evaluate performance & NVH of a brake vacuum booster system. These tests are performed by applying linear actuation to the brake booster, simulating service conditions, and measuring displacement, stroke, pressure, load, and noise characteristics of the brake system as experienced on the vehicle.

Through a servo controlled air supply, the booster may be actuated with precision stroke or force control. A source vacuum is provided on the stand to recreate vacuum. An array of spring disc test consumers at varying stiffness are used to simulate the displacement of the vehicle braking system. Automatic evacuation and fill of brake fluid is provided to support test setup processes.

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Link is a leading designer and manufacturer of inertia brake dynamometers, which are recognized globally as an industry standard. Applications range across the entire vehicle line including passenger car, commercial truck, off-road, military, aerospace, and railway.

All systems are controlled via the ProLink operating system. The advanced features of the ProLink software package offer operator-dependent control or fully automatic, unattended operation. All primary operating functions are performed at the dynamometer station including selection of test parameters, control modes, display of pertinent data, monitoring of all test functions, execution of desired test sequences, and test report compilation.

Dynamometers

The Model 3900 Brake NVH Automotive Dynamometer provides capability for performance, noise and vibration testing of corner and axle type brake fixtures. This machine provides the ability to reproduce a wide range of brake noise issues.

The system incorporates state-of-the-art technology for optimal correlation to actual operating conditions.

This dynamometer is specifically designed for brake noise testing. Special care is taken to provide the optimal test conditions. The brake test cell is fully separated from the dynamometer drive and support systems to isolate outside noise and vibration as experienced on the vehicle.

Dynamometers

Model 3900System Features:

Control System: ProLink software

Double Wall, Walk-in, Thermal and Noise Insulated Brake Enclosure

Fully Isolated Brake Enclosure

Large Double Doors to Accommodate Full Vehicle Corner Sections and Axle Fixtures

Options:Environmental Conditioning

DTV Measurement

Water / Dust Spray Injection

Parking Brake

Video Capture and Playback

Road Wheel System

Custom Configurations

NVH Shaft Brake Dynamometer

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Hemi-anechoic chamber

Environmental conditioning system

Individual drive motors for each road wheel

Road surface castings on rolls

Pop-up engine cooler

Vehicle tie down and safety systems

Automotive Chassis Brake Dynamometer

Dynamometers

The Model 4900 provides the capability to evaluate a wide range of vehicles and a full set of tools for control and measurement. Typical applications include powertrain, brake, tire, and interior trim evaluations. A four-roll chassis dynamometer with an automated system for wheelbase adjustment, the Model 4900 can accommodate vehicles from the smallest passenger car to the largest light-duty truck. The result is a very versatile test apparatus with many applications.

To accommodate specific needs the Model 4900 can be customized in many ways. The size of rolls, surface treatment, allowable load range, and many other parameters can be defined by the customer. Speed ranges are available from 200 to 400 kph (125 to 250 mph). Models have been developed for the evaluation of small passenger cars to aircraft testing – attesting to the wide range of options available. The Model 4900 can be ordered alone or as part of a complete noise and vibration evaluation package including the dynamometer, a hemi anechoic room and an environmental control system.

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Automatic and manual selection of solid disks to provide 11,000 kg IE to 34,000 kg IE in 450 kg IE increments, with “hard” inertia only

Inertial Simulation of + / - 7,500 kg IE enabling a total range of 3,700 kg IE to 42,000 kg IE

Two horizontal loading heads with provisions for future addition of a third head positioned vertically above the road-wheel

Simultaneous independent measurement of tire load, drag load, side load and brake torque

Closed loop Servo controlled hydraulics

Full-Scale Aircraft Electrical/Mechanical Inertia Dynamometer

Dynamometers

The dynamometer simulates conventional and emergency braking conditions and landings at speeds up to 560kph. The equipment combines mechanical and electrical energy to provide maximum testing capabilities and can simulate aircraft weight, windage, drag, thrust and other dynamic characteristics.

Auxiliary equipment, which is utilized to augment test capabilities and automate operations, includes high-capacity, variable speed cooling and dust evacuation systems as well as a static torque system to simulate parking brake forces and high response servo controlled hydraulic subsystems.

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Vehicle Systems

While laboratory testing offers many benefits, such as cost savings and minimization of test variables, in-vehicle testing is an essential step for fully understanding how components behave as part of complete systems. Link excels in providing compact data acquisition systems and accessories that offer accurate, cost efficient, and flexible testing advantages.

Link designs and manufactures portable data acquisition systems for use in vehicular or laboratory bench testing applications. Systems are offered in both compact assemblies, designed to provide a set number of channels for the customer, as well as modular assemblies, which allow the customer to customize their system to fit their own personalized needs.

The Model 3802S is the latest in the Link line of the 3800 Series Compact Data Acquisition systems. It uses a Windows Embedded software platform system and an internal solid state drive to provide superb, robust operation and additionally support a variety of new system features and enhancements.

The 3802S eliminates the requirement for a laptop computer during testing through the integration of an embedded computer. The 3802S is small and lightweight and simplifies the testing procedures, yet offers features that meet the needs of the most demanding tests. The compact size and simple operation make for use with fleet vehicles ideal. This system also allows for ease of use when performing tests on multiple vehicles.

When immediate feedback is required, a laptop or tablet computer can be connected to the Model 3802S so that data is reviewed in real time. The real time display gives the driver feedback in graphical or text format. Target bars can be set up aiding the driver to perform accurate tests. Data analysis tools (RevDataPlus and ReportAssist) are available to retrieve the data immediately after each event.

The 3802S can also support an optional display which can be configured by the user and can be output from the 3802S itself or a laptop.

Model 3802SStandard Features-Base System:

32 GB SSD drive

8 Analog Cannels

8 Thermocouple Channels

6 Pulse Encoder Channels

4 Digital Input Channels

45 CAN Channels

Selectable Sampling Rate to 500 Hz

Global Slow Data Recording

2.0 USB transfer

Integral Voltage Module

Hand Pendant with Text Display for Driver Interface

Configuration, Calibration, Analysis, and Reporting Software Included

Optional Features-Expanded System:

64 GB SSD Drive

6 Channel NVH Measurement

CAN Interface Cable and Connector

Expansion Modules for Adding up to 32 Temp and 16 Analog Channels

Vehicle Systems

Data Acquisition System

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Information presented in this brochure is for informational purposes only. Link Engineering Company reserves the right to make changes, alterations and substitutions to the machines, components or other information presented in this brochure without prior notice. For the latest information, contact Link Engineering Company. Equipment pictured in this brochure may be shown with safety equipment removed or disabled for purposes of illustration. Equipment must never be operated with safety equipment removed or disabled. For more information, contact Link at

[email protected] or visit www.linkeng.com

TESTING SUPPORT

PROLINK SOFTWARE

In addition to design and manufacturing,Link also offers engineering and testing support through its global test operations. Headquartered in North America with strategically placed facilities across four continents, Link provides expertise regarding all aspects of the test execution and data reporting for both laboratory and full vehicle testing.

For more information,contact a Link representative today.

Link Brake and Friction Test Systems, along with the rest of our test systems, are operated with ProLink software. Since the late 1990s, Link has implemented ProLink control and data acquisition software on more than 800 pieces of test equipment around the world. The advanced features of this software package offer operator dependent control or fully automatic, unattended operation. ProLink handles machine operation, data acquisition, post processing and report generation. The operator only needs to set up and start the test and the software will do the rest. ProLink is a major advantage of Link test systems due to its flexibility to quickly adapt to the changing needs of the end user.

brake & friction test systems - en

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