What is common rail direct injection (CRDi) in diesel engines?

Common rail direct injection uses a high-pressure fuel rail (1600-2500 bar) that supplies all injectors, unlike older systems where each injector had its own pump. This allows precise electronic control of injection timing, pressure, and multiple injection events per cycle. Benefits include reduced noise, lower emissions, better fuel economy, and improved power delivery. It's standard in modern diesel vehicles like Mahindra Scorpio and Hyundai Creta diesel variants.