The full form of TDCi is Turbo Diesel Common rail injection . It’s used on Technology ,Automotive in Worldwide

Turbo Diesel Common rail injection (TDCi) is a type of fuel injunction system in Ford Diesel Engines.

Common rail is a fuel injection system found in modern diesel engines. Common rail systems provide a level of flexibility which can be exploited for class leading emission control, power and fuel consumption. This enables Original Equipment Manufacturers (OEMs) to design for optimum performance and exceptional end-user value across a range of machines and applications.

An increasing number of modern diesel engines employ common rail direct injection (CRDi) fuel systems for the flexibility they provide while meeting the most stringent emission control standards.

In common rail systems, the fuel is supplied to the engine under pressure with electronically controlled precision. This provides a level of flexibility which can be exploited for class leading levels of emission control, power and fuel consumption.

Perkins applies CRDi technology to its electronic product offerings in the 400, 850, 1100 and 1200 Series.

The fuel in an electronically controlled engine is stored at variable pressure in a cylinder or ‘rail’ connected to the engine’s fuel injectors via individual pipes, making it a ‘common rail’ to all the injectors. The pressure is controlled by a fuel pump but it is the fuel injectors, working in parallel with the fuel pump, that control the timing of the fuel injection and the amount of fuel injected. In contrast earlier mechanical systems rely on the fuel pump for pressure, timing and quantity.

A further advantage of the CRDi system is that it injects the fuel directly into the combustion chamber. The indirect injection (IDI) system in older engines injected fuel into a pre-combustion chamber which then fed the main combustion chamber.