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crdi engine


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CRDi Engines:



INTRODUCTION The COMMON RAIL system was developed in late 1960`s by Robert Huber of Switzerland . After which many refinement took place in this field and finally , it was sold for general purpose in 1995. the technology that has been revolutionizing diesel engines


continued CRDi is one of the most advanced diesel technologies in the world, and combines both performance and fuel economy. Common Rail Direct Injection Engine (CRDI)WAS FIRST designed by Europian based Detroit Diesel Company.

Cause Of Origin:

Cause Of Origin The driving motivation behind the development of CRDi is the adherence to ever-increasing emission regulations while maintaining the drivability and low combustion noise characteristics of gasoline-driven engines, and the superior fuel economy of the diesel engine.

What Is CRDi?:

What Is CRDi ? C R D I COMMON RAIL DIRECT IGNITION The COMMON RAIL system was developed in late 1960`s by Robert Huber of Switzerland . After which many refinement took place in this field and finally , it was sold for general purpose in 1995.


continued In the CRDi unit, a tube -- also called common rail -- connects all the injectors and contains fuel at a constant high pressure of 1800 bars .

Why CRDi?:

Why CRDi ? Cut fuel consumption by 20%. Appox . Double torque. Increase power by 25%. Reduction in noise and vibration. Less pollutant exhaust

What is the difference?:

What is the difference? The difference mainly lies in the fuel injection system the fuel injection timing is electronically controlled and fuel at high pressure is available all the time and is independent of engine speed, unlike in conventional diesel engines. This results in precisely metered, quickly injected and highly atomised fuel being delivered which results in much greater overall combustion efficiency. With this greater engine efficiency and a better air and fuel mixture both in terms of quantities and mixing, a common rail engine is also much more environmentally friendly and fuel efficient.

Technical aspect of crdi:

Technical aspect of crdi


Features Combustion control equals or exceeds that for a petrol engine high fuel compression and injection pressure are maintained. Fuel efficiency is improved 20%. Torque improved by 50%.


continued Power output is improved by 25%. Emission reductions are 20% for carbon dioxide, 40% for carbon monoxide, 50% for hydrocarbons and 60% for particulate materials.

Characteristics of CRDi:

Characteristics of CRDi electronic control over the injection time and quantity Use of "pilot" injection. Use of post ignition. Four to five injection per cycle. High pressure in common rail.



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Company manufacturing crdi :

Company manufacturing crdi Bosch Delphi Siemens Denso

How effective:

How effective

Emision standard :

Emision standard


continued In emission, greenhouse gases (CO2) is reduced by 20% . At a constant level of NOx , carbon monoxide (CO) emissions are reduced by 40%, unburnt hydrocarbons (HC) by 50%, and particle emissions by 60% .



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. C RDi engine Pressures exceeding 1200 bar, uniformly maintained Direct injection of high pressure fuel Less engine noise (Pilot injection prior to main injection increases compression pressure, thus reducing the noise) Injection pressure remains constant throughout the injectionprocess Electronically controlled metering of fuel quantity Electronically controlled injection timing & independent ofengine speed Low fuel consumption at all engine speeds (due to optimum airfuelratio ) Low emission at all engine speeds (due to optimum air- fuelratio ) Variable (electronic) control of exhaust gas recirculation intointake manifold - reduces NOx emission & delivers optimum performance Finely atomized fuel results in efficient air-fuel mixing & reduced conventional engine Pressures ranging from 200 - 400 bar Indirect injection of fuel Noisy engine Fuel injection pressure varies during the injection process Mechanical metering of fuel quantity to be injected in thecylinder Fuel injection timing mechanically controlled by Fuel Injection Pump & variable with engine speed High fuel consumption at low engine speed (due to imperfectair -fuel ratio) High emission at low engine speed (due to imperfect air- fuelratio ) Mechanical control of exhaust gas recirculation into intakemanifold Poor air-fuel mixture causes particulate emissions

Different Names of CRDi technology:

Different Names of CRDi technology Honda's i-CTDi Hyundai-Kia's CRDi Mahindra's CRDe Nissan's NEO-Di Mitsubishi's DI-D Tata's DICOR Renault's dCi BMW's D-engines Ford Motor Company's TDCi Duratorq and Powerstroke


Conclusion For environmentalists and those who are out to make tighter emission rules, here is a brilliant technology that promises to reduce and give cleaner emissions to leave a healthier environment behind for our next generation. For engineers, it’s a milestone achieved in the process of making way for the emission free automobile


continue The Common Rail Technology is an Engineering Marvel: Gives more POWER ; Improved FUEL ECONOMY; Less P OLLUTION ; and last but not the least A DIESEL ENGINE whose noise levels match a PETROL ENGINE

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