Common Rail Injector Test

---

Most modern engine fuel systems use an advanced technology known as CRDi or Common Rail Direct Injection. Both petrol and diesel engines use a common 'fuel-rail' which supplies the fuel to injectors. However, in diesel engines, manufacturers refer to this technology as CRDi. In Common Rail Direct Injection, the combustion occurs directly into the main combustion chamber located in a cavity above the piston crown. CRDI consists of four components like  

1. High Pressure Fuel Pump

2. Common Fuel Rail
3. Injectors

4. Engine Control Unit

The CRDi technology works in tandem with the engine ECU, which gets inputs from various sensors. It then calculates the precise quantity of fuel and timing of injection. The fuel system features components that are more intelligent in nature and controls them electrically / electronically. The high-pressure pump supplies pressurized fuel. The pump compresses the fuel at the pressures of about 1,000 bar or 15,000 psi. It then supplies the pressurized fuel via a high-pressure pipe to the inlet of the fuel rail. The fuel-rail distributes the fuel to individual injectors which then inject it into the combustion chamber. 

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.