Dicor or crdi is the same thing, its called the common rail direct injection, these diesel engines are more fuel efficient, less emmision, less noisy and requires less maintenance. In this type of engine, the fuel is directly injected into the combustion chamber which results in increased efficiency. There are components in this engine which reduces the noise and reduce emmision level.
DICOR, CRDI, CRDE ARE SAME TECHNOLOGY.
DICOR : DIRECT INJECTION COMMON RAIL. IT IS MORE FULE EFFICIENT THAN NORMAL DIESEL ENGINE AND MORE POWERFULL, LESS NOISY. IT IS A GOOD ENGINE AND MORE ECO FRIENDLY .
hi riya,dicor is the trade mark of common rail direct injection engines for tata motors.
CRDi engines are bringing the smoothness, cleanness and fuel-frugality in cars, something that 108 years ago had been but a pipe dream.
Diesel engines powered factories, industries and cars after French-born Rudolf Diesel built the mean machines in 1897. There was one drawback — with prolonged use, high noise, harshness, vibration and dark fume emissions remained. These emissions depleted the ozone layer contributing to global warming and resulting in erratic weather patterns.
Engineers went to work refining the technology yet much of yesteryear-drawbacks were evident. The glitch it seemed was that old diesel technology used rotary or mechanical fuel injection to force fuel into injectors then into chambers where highly compressed hot air burns fuel.
It is the fuel burning that causes pistons to move but with inaccurate timing in fuel injection, some diesel fuel is not burned properly. Improperly burned fuel emits black fumes from exhaust pipes.
From hybrid to rail injection.
Through the years, developing reliable and sustainable engines became expedient as a consequence of fuel price inflation and supply depletion. The US commissioned the Environmental Protection Agency to develop more sustainable, lean-burning car engines.
About a couple of decades ago, a few manufacturers looked to solve the problems that typically plagued diesel engines - Noise and vibration, higher wear and tear, and pedal response, without losing its advantages - higher torque at same speed (as petrol), and better efficiency. Theoretically, one of the big differences between petrol and diesel engines is the compression ratio, which causes all the problems. One way they looked to solve the problem is to introduce a 'Common Rail' which connects to all the intake valves, and contains compressed air at a maintained pressure of 1200psi (or some such). This allows them to then design a smaller capacity engine with a smaller stroke but still achieve the same compression ratio required to combust diesel.
Is a CRDi essential to achieve good driveability, response and efficiency? A truthful answer is no. The reality is that direct injection + natural aspiration is very hard to achieve, and is prone to major issues in use, UNLESS they get certain parameters correct. So most manufacturers stuck to indirect injection (which has a pre-combustion chamber to mix the diesel-air combo BEFORE it is taken in into the combustion chamber). An example of this is the Tata Indica/Indigo, Ford Ikon Diesel, etc. The problem with these engines is the low response and apparent sluggishness. BUT manufacturers like VW (Skoda) and brit marques like Rover, have been making powerful and fuel-efficient Direct Injection engines for a while, with well timed multiple aspirations and injections, and since they do work very well, have not shifted to the Common Rail variety.
Apart from high input costs, Common Rail technologies, till recently used to come with Royalties attached, since only a few own the method, and hence vehicles with CRDi engines were/are comparatively expensive.
Dicor " direct injection common rail system" is one of the most importent technology adopted by "
TATA MOTERS" The perpose of this technology to provide accurate timing to inject the fuel insid the cumbustion chamber.With this there is achivement of efficient burnig of fuel,smooth& noiseless ,less emmission of wast gasses ,& to provide eco freindly envoirnment.
Common rail direct fuel injection is a modern variant of direct fuel injection system for petrol and diesel engines.
DICOR: Its nothing but "direct injection common rail", rather abbreviated. For instance; Hyundai pronounces the same technology as "CRDi" and TATA as DICOR.