It is a form of direct injection allowing higher pressures and greater control by the ECU using solenoid valves. Not being mechanically driven they are not dependent on engine speed(cams/pumps). Better atomization is thus achieved.
__________________
"Now Nortons and Indians and Greeves won't do,
Ah, they don't have a soul like a Vincent '52"- Richard Thompson
"if you look for the bad in mankind, expecting to find it, you surely will."-Abraham Lincoln
-------------------------- john@crazyengineers.com gohm@crazyengineers.net
__________________
"Now Nortons and Indians and Greeves won't do,
Ah, they don't have a soul like a Vincent '52"- Richard Thompson
"if you look for the bad in mankind, expecting to find it, you surely will."-Abraham Lincoln
-------------------------- john@crazyengineers.com gohm@crazyengineers.net
__________________
"Now Nortons and Indians and Greeves won't do,
Ah, they don't have a soul like a Vincent '52"- Richard Thompson
"if you look for the bad in mankind, expecting to find it, you surely will."-Abraham Lincoln
-------------------------- john@crazyengineers.com gohm@crazyengineers.net
it is controlled through engine control unit(ECU), which is electronic control not mechanical,
sir, thanx for the link
i'l ask for futher reading if needed
anumeha, apart from the difference that the injectors in any derivative of the CRDI technology are not mechanically driven, the added advantage that we get is the injetion control timing and the amount of injections in the power stroke. As in the conventional diesel engine we have a single injection in a power stroke unlike that CRDI relies on a carefully chosen generally four to five injections per power stroke divided very carefully over the full power stroke (of this four to five injections the one being very noteworthy and very popular is termed as the pilot injection in which very small fuel is injected just before the main injection to produce a small explosion just before the main explosion so that there is less rattling and the pressure curve rises rapidly but smoothly). this gives us a very tight control over the emissions and the engine noise. as the electronics are continiously monitoring everything the injection only occurs at peak pressure which ensures that there is no black smoke which you will normally see in any engine fitted with mechanical pumps.
27th November 2009, 11:10 PM
Common rail injection in TDCi engines! 
