-==Turbo Diesel.co.uk - The Ford Focus Turbo Diesels==-

Intro to the focus diesel range
The Ford Focus has now a choice of 3 Diesel engines in 1.8 guise, 90PS TDdi, 100PS TDCi & 115PS TDCi.  A fourth engine choice 75PS TDdi  has been phased out since the introduction of the TDCi. The Focus is available in 3 & 5 door hatchback, 5 door estate, 4 door saloon, Click on pictures below to enlarge.
             
Intro to the 1800 Diesel Engines
I've always been a big fan of Fords 1800 diesel engine through all its incarnations, The first 1800's of 1989 were indirect injection as used in fords from mk4 escort/mk3 fiesta on. The 1800 replaced the previous sluggish 1600 engine, Shortly after it was available with turbo (75PS), and turbo intercooled (90PS). In the mid late 1990's the 1800 diesel engine was then renamed the Endura DE for the later mk4 Fiesta's Mk6 Escorts and Mondeo's. Then came the most noticeable the 1800 Endura Di, a direct injection engine which appeared around the time of the introduction of the Focus, it's an evolution of the indirect injection engine, it is a pretty smooth engine with the aid of the first generation electronic diesel fuel injection.
 
TDCi. The second generation electronic fuel injection,  Turbo Diesel Common rail Injection. A highly advanced diesel engine, the 1800 version available in 100PS & 115PS power formats, it offers improved performance and lower diesel knock noise, making the engine smoother and giving better fuel consumption. It also has a unique "Overboost" system which gives you greater acceleration ability when needed for such as overtaking. The New TDCi Diesel also known as "Duratorq" is the very latest in Diesel technology, unlike conventional diesels that have mechanical injection pumps with independent feeds to the injectors, the Duratorq engine hasn't, it has a common rail feeding the electrically operated injectors via high pressure reservoir pump A high-pressure pump supplies the fuel to the common rail, which is also a high-pressure reservoir.

The fuel is then delivered via the injection valves, which receive their commands from an electronic control, the injector driver module (IDM). The majority of traditional diesel engines have available an independent cylinder fuel supply. A distributor pump driven by the engine feeds the fuel through a separate line to the cylinder injection nozzle. With the common rail, the injection point and the injection quantity can be adjusted considerably more accurately to the needs of the engine.
The Advantages:- performance tuning - economy - lower emissions - smoother running characteristics. Advanced injection is critical for the smooth running characteristics of the direct injection diesel engine. The deliberate delivery of small quantities of fuel, the so-called pilot injection, before the main quantity, has a positive influence on the combustion process. The more gentle increase in combustion pressure improves the smooth performance of the engine. This not only gives a more gentle pitch to the originally harsh noise generation of the diesel engine, it also improves combustion efficiency.