1. A diesel engine that has injectors mounted at the top of the combustion chamber; the injectors are activated either by hydraulic pressure from the fuel pump, or an electronic signal from an engine controller
   "Fuel consumption of direct injection diesels is about 15-20% lower than indirect injection diesels"; "Modern trucks often use direct injection diesel engines for improved fuel efficiency";
   - direct injection diesel engine

Type of: diesel, diesel engine, diesel motor

Encyclopedia: Direct injection diesel