His father had sold his inventions and manufacturing rights to the Robert Bosch AG, and this led to the foundation of the company.

With the advent of new drive technologies, Rudolf L'Orange developed and invented new injection systems, such as the "zweimengendüse" for continuous atomization.

Together with Karl Maybach, who used the L'Orange direct current system for its high-speed, lightweight diesel engines for locomotives and ships, the company was successful once again.

Around 1950, L'Orange, together with Maybach, developed the pump-nozzle system that soon became indispensable for large diesel engines thanks to the many benefits it delivered.

In 1995, L'Orange was sold to MTU Friedrichshafen and then in 2006, incorporated into the Tognum Group (Rolls-Royce Power Systems AG since 2014).