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Trailer Control Module
Trailer control module (left) and tow bar control unit (Right).
Trailer Control ECU
Trailer control module (left) and tow bar control unit (Right) open.
Jaeger Box
Applying micro components on the PCB makes the modules more cost-effective.

New control modules for trailers and swiveling tow bars according to ISO 26262

IIn early October, Erich Jaeger introduced two new control modules for trailer operation for passenger cars with the ordering customer being a well-known car manufacturer. For the first time, Erich Jaeger applied a development process according to the standard ISO 26262 for functional safety of electrical and/or electronic systems in automobiles. The development work resulted in a trailer control module classified as ASIL (Automotive Safety Integrity Level) A and a tow bar control unit for semi electric swiveling tow bars classified as ASIL B. Moreover, the engineers of Erich Jaeger could optimize the products by realizing – for example – a unique hybrid pin header for common 8- and 16-pin connections and a QR-code for the traceability of testing and serial no. of every single module.

After a development phase of 18 months, Erich Jaeger could deliver the first units of a new generation of trailer control modules in late September. For the first time, the company developed modules adhering to the ISO standard for functional safety of electrical and/or electronic systems in automobiles (ISO 26262). Thus, Erich Jaeger successfully works on making its products fit for future applications – some car manufacturers already insist on their suppliers to comply to this standard when developing new products. After all, complying to the standard helps to make the complexity of modern vehicle supply systems more manageable and to make road traffic safer

Product optimizations for housing and electronics

In addition to the standardized development, the Erich Jaeger team could implement some further optimizations: As opposed to previous modules, Erich Jaeger used PBT as material for the housing. The application of the robust material improves the structural integrity of the housing along with its resistance against environmental influences.

Unique hybrid pin header grants advantages

A newly developed and market-wide unique hybrid pin header combines common 16- and 8-pin connections of reputable manufacturers in just one component part. This results in cost advantages, and the force necessary to plug in the connection is reduced to less than 60 N compared to more than 75 N for previous modules. Both the pin header and the printed circuit board (PCB) are fixed within the housing via a guide rail and internal fixation clamps, thus minimizing the risk of damage to these components and avoiding rattling noises.

High-end electronic components

The PCB features a very low quiescence current of approx. 30 μA; this value is below the value of a maximum 100 μA required by most car manufacturers thus preserving the vehicle’s battery. For manufacturing the PCB, Erich Jaeger can access the services of its associate company Bavaria Digital Technik. The manufacturer applies cost-effective micro components and places a QR-code on PCB and housing enabling customers to retrieve information on serial no. and test documentation for every individual module. This guarantees the traceability of the control modules.