Common rail direct fuel injection is a direct fuel injection system for petrol and diesel engines. Most modern engine’s fuel system uses ‘Common Rail Direct Injection’ or CRDi, which is an advanced technology. Specifically, the term ‘CRDi’ commonly refers to diesel engines. Although, there is a similar technology; which the petrol engines also use.
In Common Rail Direct Injection, commencement of combustion takes place directly into the main combustion chamber; which is located in a cavity on the top of the piston crown. Today, manufacturers use CRDi technology to overcome some of the deficiencies of conventional diesel engines which were sluggish, noisy and poor in performance; when implemented, especially in passenger vehicles.