The shift towards electrified and software-defined vehicle architectures introduces
a new level of complexity to the E/E system landscape. Hybrid and battery-electric
vehicles feature numerous drive, motor, and battery variants, contributing to a high
level of system variability. At the same time, stronger cross-domain interactions,
e.g., between powertrain, energy management, charging, thermal control, and
ADAS, demand integrated testing at higher system levels.
Our “Shift-Left” approach enables early and frequent validation of E/E functionality
through networked, remotely accessible HiL systems across multiple integration
levels.

Core Concept
We perform intensive remote testing at the component and subsystem level using
component HiLs that can be combined into subsystem and system testbenches.
These HiLs can be Schleissheimer Micro-HiLs or third-party HiLs. By doing so,
integration problems can be detected that would otherwise surface only during
expensive system integration or system validation.

Key Benefits
• Early fault discovery (Shift Left): Detect integration issues, timing
conflicts, and cross-domain inconsistencies before subsystem and system level benches exist.
• Dynamic configuration: Adapt the HiL network to different E/E
architectures and vehicle variants without long setup times.
• Scalable validation: Efficiently test across multiple domains and ECU
variants without hardware duplication.
• Remote-first, CI/CT-enabled infrastructure: Supports distributed
development, continuous regression testing, and supplier integration.
• Reduced prototype dependency: Minimizes physical build cycles, saves
resources, and reduces logistics effort.

Case Studies
Schleissheimer has been building and using Micro-HiLs for component
development across industries for several years, and we can present field studies
and an ongoing concept study. First case lessons learned: remote desktop access is
valuable but can become inefficient when many users connect. This is why
simplified GUIs and containerised access reduce clutter. Second case: processing
large volumes of test data on the test hardware can create bottlenecks; a Dual-Loop
Testing architecture (real-time stimuli on HiLs, heavy data analysis on computing
units) prevents blocking and speeds analysis.
The concept study covers the configuration via software-defined bus networking to
enable integrated testing of multiple ECUs and higher-level system tests on a single,
remotely accessible infrastructure. This includes a functional prototype for low latency networking as well as a distance analysis for the test labs. Evaluation results
from both the field studies and the concept study will be shared in the lecture.