car Vehicle-in-the-Loop outside

The vehicle-in-the-loop technology helps to close the gap between HIL tests and real test driving. The integration of real components into the virtual environment enables realistic tests. At the same time, test scenarios can be automated and reproduced at will.

Especially in the field of autonomous vehicles and for various ADAS applications such as AEB or evasive steering assist systems, tests can be performed with a multitude of virtual road users and a detailed, virtual environment. This allows for early statements on system maturity!

The vehicle-in-the-loop technology enables to test individual real components especially in late development stages by integrating them directly into the system network.

Euro NCAP tests as well as international NCAP tests can be performed with the vehicle-in-the-loop method before the full vehicle is available.

simulation real car in a virtual world


  • Event- and scenario-based traffic and infrastructure as well as complete, real-time sensor environment simulation in the physical vehicle
  • Exact determination of the position of the physical vehicle as well as transmission of the position, movement and location into the virtual world
  • Implementation of the sensor interface between the device under test / the assistance function under test in the physical vehicle and the corresponding stimuli from the virtual world
  • Stimulation of camera-based and radar-based driver assistance functions as well as ultrasound-based park assist systems
  • Xpack4 real-time system (RoadBox) enables parallel run of simulation kernel and vehicle
  • Stimulation of original ultrasound sensors of the vehicle via a hardware sensor box developed in-house
  • Operation from the interior of the vehicle via a separate host PC equipped with CarMaker
  • Implementation of the sensor interface similarly to the implementation of a conventional HIL environment -> there are different technical solutions for the signal input for different sensor types such as ultrasound, radar, lidar or camera
  • Use of a high-end IMU (Inertial Measurement Unit) in connection with GPS and DGPS to determine the exact position of the vehicle


validation in the global vehicle context


  • ADAS applications for SAE level 3
  • Automated driving SAE level 4/5
  • Camera-based systems (e.g. line detection, traffic sign recognition, etc.)
  • Coordination of steering feel
  • Multi-sensor-based systems (e.g. emergency braking or blind spot assist systems)
  • Emergency braking performance and braking comfort
  • Radar-based systems (e.g. adaptive cruise control)
  • Performance tests in the field of longitudinal control of the vehicle as well as for lateral control functions
  • Platooning for trucks
  • Valet parking
  • Realization of studies on human machine interfaces with human test participants in the physical vehicle

Your benefits at a glance

Connection of real and virtual world

Reproducible, configurable scenarios with real vehicle dynamics

Great evaluation for systems to be developed

Use of CarMaker’s comprehensive simulation environment

Modularity and extensions

Applicable to every vehicle configuration


Risk-free development process

Through use of simulation

Time and costs saving

No need for NCAP targets


Direct experience in the physical vehicle

Experience technical functionalities and effects

High level of system maturity

Early testing of individual components in the physical vehicle

Physical reproduction of the sensor interfaces

Use of CarMaker RSI sensor models