µLC Test System – Hardware-in-the-loop Interface for automotive control units

Camshaft Crankshaft PWM CAN LIN SENT USB Interface

The new and modern hardware-in-the-loop test system μLC Test System is suitable for mobile application, measuring a compact 17 cm x 11 cm x 6 cm. Initial test setup typically takes under ten minutes, since the system allows for a simple test setup. It is a compact open-loop test system for quality assurance of control unit development and combines the simulation of all typical automotive sensors and communication protocols in one unit. Its interface is userfriendly and enables an easy operation and evaluation. The μLC Test System is especially used for automotive control units with typical interfaces for sensors and bus systems such analogue/digital inputs and outputs, PWM signals, SENT, CAN and speed sensors.

Technical Data  
Operating voltage 12 V DC
Current consumption typ. < 1 A
ECU voltage 12 V / 24 V DC
ECU current 10 A
Permissible operation temperature 0°C to 40°C
Housing material Aluminum
Dimensions 175 mm x 107 mm x 61 mm
Weight 690 g

Functionalities of the HIL USB Interface: µLC Test System

Engine Speed Simulation: up to 20,000 rpm, Sensor types: Hall, inductive, DG23i, TL4953

  • Vehicle Busses: 2* CAN, LIN Master/Slave, 4* SENT
  • Digital und analogue Interfaces: 6* digital Out, 2* Relays, 2* PWM input, 4* PWM output, complexe PWM, 12* DAC, 6* ADC
  • Additional Features: Cylinder Pressure Simulation, Expansion boards for additional HW features, Multi device support, Throttle Simulation

Flexible possibilities for test automation

Since the µLC Test System is flexible and efficient with minimal cost, each individual control unit project can have its own test station to provide the best possible support to automated testing. The µLC Test System provides the possibility of a complete automation through Lua scripts and an application programming interface (API). This API fits the existing control software and offers both a graphic interface and the opportunity to operate the µLC Test System. Thanks to its open software interfaces, the test system can also be integrated into pre-existing test infrastructure such as Trace Tronic GmbH’s ECU Test. As a result, this sort of test system allows for continuous integration in software development, so as to keep on collating the modifications of different developers.

Example of application for the µLC Test System

Test arrangement of the µLC Test System

Test arrangement of the µLC Test System

Application of the µLC Test System

Application of the µLC Test System

The µLC Test System stimulates the control unit with simulated sensor signals. In case of an engine control unit, e.g. crankshafts and camshafts, accelerator pedals (analogue or SENT), combined sensor e.g. temperature – oil pressure sensor (complex PWM). It facilitates the measurement of both the control unit signals (analogue, PWM, buses) and internal variables of the control unit e.g. using calibration software.

In the following you can find concrete practical examples of application for the µLC Test System:

Flashing of software for control units

- Power supply, terminal 15

- Review of flashing process

Initial operation of software

- Review of core functions of the control unit

Function test

- Functional testing of individual functional parts within the software

- E.g. checking whether cooling is activated at a certain temperature


- Control of correct functions of all in- and outputs of the control unit

CAN simulation

- Control of CAN communication

- Control of diagnose – tester communication

The symbiosis of hardware and software – µLC Test System and MicroLC Software

MicroLC Software Screenshot Graphical User Interface GUI

MicroLC Software with analogue outputs, crank-/ camshaft, RPM and complex PWM

Bosch Motorsport provides the µLC Test System, including the hardware and control software (MicroLC Software), and its maintenance by regular software updates and e-mail support. The MicroLC Software is finely adapted to the µLC Test System and guarantees a fast test arrangement and results, since it is ready to use at any time. If required we offer additional services for an expansion of the hardware (e.g. additional interfaces) and of the control software by implementing new functions. Further a connection to existing customer solutions, an implementation of automations and the development of test cases is served.

For further information e.g. datasheets please refer to our product catalogue/Electronics/Test System or contact

Matthias Mayer


Tel. +49 7062 911-7846


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