HDi

In the Automobile sector , the initials HDi means Direct High Pressure Injection .

It is about the name given by PSA Peugeot Citroen to a new generation of diesel engine to direct injection and Turbocompresseur, calling upon technology Common rail (slope common of injection to high pressure) invented by FIAT and used the first time in 1996 on the Alfa Romeo 156. The first HDi engines are marketed in 1998. This technology makes it possible to manage the injection of the fuel as well as possible (pre-injection, principal injection and post-injection) and to appreciably decrease the noise, consumption and the polluting emissions, by also allowing an unknown approval of control before. HDi was a great business success, PSA announcing in September 2007 the production of the ten-millionth engine.

Other manufacturers use this technology: JTD 1st generation and MJtd 2nd generation in group FIAT: FIAT, Alfa Romeo, Lancia and Iveco, TDCI at Mercedes, DCI at Renault…

Principle

The Carburant is brought tank by a Pompe towards a distribution ramp of fuel under high pressure (more than 1500 bars) which feeds the Injecteur S. This pressure makes it possible to inject fuel in the cylinders in order to obtain better a Combustion than in the old diesel engines. The result is a better output of the engine.

First generation

Range of engines

The first generation of HDi engines was made up of the following models:

2 liters (DW10) proposed in version 90 and 110 horses (DIN)
2,2 liters (DW12) marketed in version 136 horses (DIN)

Second generation

An evolution of engines HDI appeared in 2003 (beginning of marketing) at the conclusion of a partnership of development with Ford. With cubic capacity equalizes with respect to the " anciens" HDi, they profit from a higher power and a more important couple. Consumption is also less low. At Ford, the equivalent technology of these diesel engines is indicated under initials TDCI. They are not proposed with powers and couples strictly identical to HDi of the group PSA, although appreciably close.

Range of engines

Among the currently available engines of the range, it there a:

1,4 liter (DV4) available in version 70 horses and 92 horses (DIN) (the 92 ch version will have known only one transitory career under the cap of the only Citroen C3)
1,6 liter (DV6B) available in version 75 horses (DIN) (This engine is assembled on Peugeot Partner/Citroen Berlingo);
1,6 liter (DV6A) available in version 90 horses (at Peugeot) and 92 horses (at Citroen) (DIN);
1,6 liter (DV6) available in version 110 horses (DIN);
2 liters (DW10A) proposed only in version 120 horses (DIN) (This engine is exclusively assembled on Peugeot 807/Citroën C8);
2 liters (DW10B) proposed only in version 136 horses (at Peugeot) or 138 horses (at Citroen) (DIN);
2,2 liters (DW12B) (biturbo) marketed in version 170 horses (at Peugeot) or 173 horses (at Citroen) (DIN);
2,7 liters (DT17) (single six-cylinder motor out of V of the range) proposed in version 204 horses (at Peugeot) or 208 horses (at Citroen) (DIN).

Competition

In 2007, Peugeot put in competition the 908 for the race of the 24 hours of Mans. This prototype was been driven by a HDi engine of 12 cylinders out of V and was equipped with a Filtre to particles. This vehicle was distinguished by taking the second place at the time of this edition.

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