news overview
11. 2014

Premiere: iTAP for hydraulic axles

iTAP, the award-winning “intelligent Trailer Access Point” developed by Knorr-Bremse, now makes life easier for drivers of vehicles with heavy-duty axles – as long as they are driving a Goldhofer semitrailer with independent suspension like the new MPA generation. In the framework of a joint development project, the two system partners have scored another first with the implementation of iTAP functionality in vehicles with hydraulic suspension. This means that drivers with heavy loads can now take advantage of the numerous iTAP features, too, like using their smartphones to adjust ride height.

“We are a good match: At the IAA Commercial Vehicle Show, we received the Trailer Innovation Award 2015 in the Chassis category for our revolutionary MPA Axle Technology, while our partner Knorr-Bremse received the award for its iTAP solution in the Smart Trailer category. Now we can offer customers the combined result of these two benchmarks, with new heights of user-friendliness,” says Stefan Fuchs, CEO of Goldhofer Aktiengesellschaft.

iTAP, the intelligent Trailer Access Point, is at the heart of a remote control app that permits the driver to control certain trailer functions without having to do the job on the trailer itself. That is real convenience; the driver no longer has to leave the cab to make certain changes to the trailer. In the past, for example, the driver had to get out to adjust the axles on the trailer,” explains Volker Schmidt, Chief Design Engineer at Goldhofer.

Since the iTAP module is installed directly on the trailer as an extension to the EBS module and has its own WLAN, trailer functions can be controlled independently of the tractor. The link between the driver’s smartphone and the iTAP access point is based on a secure connection and password-protected with the help of the brake pressure random number generator.

In addition to intelligent axle control with four pre-programmed and two freely programmable axle heights, the iTAP module also offers the driver permanent tire pressure and temperature monitoring. If a tire is damaged, the system automatically generates an alarm.

“I am delighted that we have been involved in the development work as the chosen partner of Knorr-Bremse and that we can once again offer our customers meaningful added value. It’s especially gratifying that the result has enabled us to take our exciting innovation, namely MPA Axle Technology, yet another step further,” adds Stefan Fuchs. Goldhofer’s MPA Axle Technology, for which patents are pending, is the lightest independent suspension system on the trailer market. It has been designed in line with the “less is more” principle for optimum performance in terms of axle tracking, steering, suspension, damping and suspension stroke.


The Knorr-Bremse company is the world's leading manufacturer of braking systems for rail and commercial vehicles. For more than a hundred years, the technological pacemaker has pioneered the development, production, marketing and servicing of state-of-the-art braking systems. The product range in the commercial vehicle systems sector comprises complete braking systems including driver assistance systems, torsional vibration dampers, powertrain-related solutions, and transmission control systems for enhanced energy efficiency and fuel economy.

news overview