1) CRDi ensures the fuel injection timing, quantity of fuel and atomisation or fuel spray are controlled electronically using a programmable control module. This allows multiple injections at any pressure at any time (within pre-defined limits), providing a level of flexibility which can be exploited for better power, fuel consumption and emission control.
, vibration and harshness (NVH) are improved
with CRDi as a result of the timing flexibility.
2) Your engine
sounds quieter and has a better quality of sound. It also runs smoother. You will see fuel consumption
benefits as well because greater injection pressure produces a finer spray of fuel (atomisation) that burns more efficiently.
3)Better combustion efficiency
is a key part of meeting emission standards. Less fuel is wasted as soot or particulates in the exhaust
and deposits in the engine
. A cleaner running engine is good for the environment
– and for the cost of ownership
. Cleaner running improves the long-term durability and reliability
of your engine.
4) These days normally very reliable
2) A diesel
engine with a common rail injection system can cost as much as twice than a diesel
engine without a common rail system(But getting cheaper as more commonly used).Price is also driven up by the Electronic control unit, which is a very technologically advanced, key part of the whole Common Rail System
2) If injectors become, even slightly, fouled they can fatally malfunction
You must hire a certified mechanic
on a Common Rail Diesel
All the parts
of a CRD are very delicate and can break more easily than conventional injectors.
3) Normally requires dedicated shop technician or plug
in diagnostic device to trouble shoot,
I have never been called on to diagnose a failed ECU due to lightning
strikes, radio's , electronics
in general (YES) , most ECU's these days are build pretty hardy and designed to accept harsher punishment,
Today on the larger commercial
engines (200 Hp up) it's really hard to find a conventional diesel as all the major manufacturers now only use Common rail systems as does nearly all car and truck engines.
For me, personally (and a bit older) I would rather have a conventional diesel for cruising applications (got to love the old GM's/Yanmars/Perkins/Fords and my favorite GARDNER)