1940s

1942: Tatra started production of Tatra 111 with air-cooled V12 diesel engine.
1943–46: The common-rail (CRD) system was invented (and patented by) Clessie Cummins[22]
1944: Development of air cooling for diesel engines by Klöckner Humboldt Deutz AG (KHD) for the production stage, and later also for Magirus Deutz.
1950s

1953: Turbo-diesel truck for Mercedes in small series.
1954: Turbo-diesel truck in mass production by Volvo. First diesel engine with an overhead cam shaft of Daimler Benz.[23]
1958 EMD introduces turbocharging for its 567 series of medium speed, high horsepower locomotive, stationary and marine engines. Every subsequent engine (645 and 710) would incorporate this turbocharger.