Remember Ralph Sarich and his engine, I think that technology was bought and restricted as well.
Not quite as the Sarich engine originally offered reduced fuel consumption in response to the Arab oil crisis but its long development time meant conventional piston engine technology along with fuel injection kept pace with that and ultimately Sarich's engine couldn't overcome a number of design problems to compete-
https://en.wikipedia.org/wiki/Sarich_orbital_engine
Nevertheless the need for direct injection did produce leading technology in that field and in conjunction with Siemens and their Synerject project commercialised that-
http://www.italiaspeed.com/news_2003/news_2003_081orbital.html
As well as developing a direct injection two stroke piston engine that didn't consume oil Orbital Engine Company became an engineering and fuel testing company for other carmakers as a result although that business waned and it would appear with their ability with small engine combustion technology and various fuels they're now well established in the UAV sector-
https://orbitaluav.com/about-us/our-business/
So they've had a few changes of direction over the years from Mr Sarich's initial foray into automotive engines and you can't afford to stand still in any fast moving technological sector but constantly adapt to the marketplace and go where the profitable returns are. There's no conspiracy to be had in a global marketplace as build a better mousetrap and the world will beat a path to your door with plenty of imitators to follow. After all why on earth would you sit on clearly advantageous technology leaving all the returns to others in future? It's an urban myth that anyone or any corporation would do so as it's hard enough kicking and gouging in the existing marketplace with well known technology and you're always looking for an edge over your competitors.
