// Powertrain
Powertrain Testing
A test’s focus can vary significantly here. It can relate to the behaviour of individual components in the overall system or to the effects of different boundary conditions and loads.
The great comparability of load conditions also offers the possibility of transferring vehicle tests from vehicle to test bench with high reproducibility, high availability and high measurement quality.

Challenges of Testing Complete Powertrains
Tasks in this overall system consideration result from technical equipment and development progress of modern drivetrain topologies, for example:
- Different transmission types
- Functionality of different energy converters
- Energy storage
- Degree of hybridisation
- Combination of conventional and EV-axles
- EV drives
- Fuel cell drives
Process Handling
The completion of a project for our customers can be divided into three phases:
Project Coordination
— Check
— Engineering
- Required tools
- Simulation
- Test bench
Processing
— Reporting
— Data transfer, IT solutions
— Engineering packages
Report
— Outlook
— Discussion of findings
— Optimisation
Areas of Responsibility of Powertrain Testing
Areas of Responsibility
- Validation tests
- Functional tests
- Coordination of drivetrain strategies (e.g. hybrid)
- Emissions
- Calibration tasks
- Dynamic test cycles
- Real drive simulation
- Efficiency observations
- …
Database
- Accredited test environment (DIN ISO 17025)
- Data review and evaluation by engineer
- Preparation of data in customer format
Security
- Prototype protection
- IT Security
- Secure data connection → for prompt transmission of analyses and raw data
- Centralised communication channels
From Complete Powertrain to Individual Components
- Manual, automatic, transfer and rear axle transmissions
- Electrified gears
- Clutches
- Lubricant and coolant
The large number of different potential test specemins illustrate how high demands are on the test bench and how many different test prodecures are required. Our highly flexible multi-machine test benches allow testing of the individual components in countless configurations.
Transmission Tests
- Continuous operation
- Functional examinations
- A wide range of transmissions; from differentials and transmissions to transfer boxes and including hybridisation
- 1M – 4M test stands
- Use of test stand transmissions for higher speeds and torques
- Ambient air conditioning
- Pitting tests
- Contact pattern analysis
- NVH investigations
Efficiency Measurements
- For transmissions as well as electric drives
- Lubricant influence determination
- High precision measurement technology
- Very high reproducibility
- Different conditioning options
Rotor Testing
- Rotational speed change tests
- Different ambient temperatures
- Individual superstructures
- Optimised cycle times
// Locations
Headquarters Landau
APL Automobil-Prüftechnik
Landau GmbH
Am Hölzel 11
76829 Landau
// Wolfsburg
APL Automobil-Prüftechnik
Landau GmbH
Gustav-Hertz-Straße 10
38448 Wolfsburg
// Bietigheim-Bissingen
APL Automobil-Prüftechnik
Landau GmbH
Robert-Bosch-Straße 12
74321 Bietigheim-Bissingen
// APL Group
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