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[Energy] [Column]Green Car 4 – Clean Diesel Vehicle _Park Jung-Kyu

by Eco Generation | 21-03-2012 10:02 Comments 29 recommendations 0

Green Car 4 – Clean Diesel Vehicle


Park, Jung Kyu, a researcher at Korea Industry Technology Institute


1.     What is diesel engine?


Diesel engine is an internal combustion engine that uses diesel (or heavy oil). Also, SUV (sports utility vehicle), lorry, or van that we often see on the road use diesel engine. Oh yeah! Did you know that diesel is a name of a person? Rudolf Diesel is a German machinist who was born in 1858. Diesel researched for long period of time, and as a result, he invented stronger engine that has better gas mileage than gasoline engine in 1894. This is why he named Diesel Engine after himself. But this doesn't necessarily mean that diesel engine is better than the gasoline engine. Because a lot of NOx (nitrogen oxide) and PM(fine dust) substances are discharged through exhaust gas. This is why diesel engine is known to be more harmful to the environment than the petroleum engine in general.   



2. Is clean diesel same as diesel?


Yes, it is. But clean diesel doesn't have to install new battery or motor to produce moving power like fuel cell car or hybrid vehicle. Just consider it as the same as the existing diesel. But fuel efficiency has improved and technology that decreases exhaust gas, such as NOx and PM, is incorporated. It would be better for our environment, right? This is why they used the word 'clean'. Just because exhaust gas is reduced by a little bit, not everything is called clean diesel. Japan, America, and every other country has their own standard, but in general, clean diesel vehicle is determined by EURO 5*, a European standard.

* EURO is a regulation for exhaust gas that was introduced by the European Union. EURO 5 is a standard that was suggested in 2008, and diesel cars need to satisfy NOx 180mg/km, PM 5mg/km to be called or referred to as clean diesel.



3. What kind of technology is applied in clean diesel?


I mentioned how NOx and Pm are the problematic exhaust gases, right? First, there is DPF(diesel particle filter) and to make a simple explanation, this is similar to the technology that filters out exhaust gas. PM is reduced by this technology and there are SCR(Selective Catalytic Reduction) and LNT that purify NOx. Isn't it amazing how approximately 85% of NOx emission can be reduced with these technologies? Meanwhile, there is a technology called CRDI(Common Rail Direct Injection) that improves fuel efficiency. You probably have seen CRDI written on the side of SUV often. CRDI is a technology that improves combustion efficiency by spraying the optimal amount of high-pressure fuel by electronic control. The fuel cost would be better because combustion efficiency is improved, right? It is not easy to develop technology, but such technologies have been developed for long period of time because of problems such as unavoidable energy exhaustion and environmental problems. Since the development of these good technologies, unclean image of diesel vehicles because of deep-black exhaustion gas has improved.   



4. Do consumers prefer clean diesel?


Clean diesel vehicle is sensationally popular in Europe enough to be called 'a paradise' for clean diesel vehicle. It was reported in the newspaper that the sales rate of clean diesel exceeded 70% in 2008. Isn't it amazing? Western Europe paid interest in clean diesel vehicles as early as late 1990's. And policies, such as tax deduction and subsidization, are also supplied in each country. Consumers would prefer this vehicle as performance improves, as there is less environmental pollution due to emission laws, and increased national support, right? But our country still has negative perception on diesel. However, consumers still believe that it is more expensive than gasoline cars, not comfortable to drive in, and that it is a messy car that generates black smoke. This is why clean diesel vehicles are not preferred in Korea as much as in Europe, but it seems like we can see clean diesel vehicles on the road as soon as people?s awareness is improved day by day.     



5. Then, what kind of Green Car is favorable?


In general, clean diesel vehicle is known to have 15% better fuel efficiency compared to the general diesel vehicle and 20~30% better than the gasoline cars. This is why clean diesel vehicle can be the solution to the energy depletion, and since it consumes less fuel, it can be better for the environment also because it decreases the emission of carbon dioxide that is known to be the main cause of global warming. But as seen in Green Car 1 and 2, electric vehicle does not emit exhaust gas, right? And just like electric vehicle, fuel cell car is also pollution-free vehicle that contains no toxic substances, such as CO2, Sox, or NOx. Considering the exhaust gases, clean diesel vehicle is not necessarily the best green car. But, you know that it is still inconvenient to ride electric or fuel cell vehicles, right? They are expensive, have short traveling distance, and there are only few hydrogen station.  This is why clean diesel vehicle can be seen as a realistic alternative vehicle that can respond to the Climatic Change Convention, EURO 5, or other emission laws more effectively until problems of fossil fuel vehicle or electric vehicle are commercialized.






  • says :
    Extremely interesting and covered a lot of questions that people tend to wonder about. Thanks!
    Posted 27-11-2015 22:09

  • says :
    Wow,thats very interesting
    Posted 09-11-2015 21:53

  • says :
    it is very informative...
    Posted 11-01-2015 22:52

  • says :
    Good report :)
    Posted 25-11-2014 18:54

  • says :
    thanks for the info
    Posted 20-11-2014 01:09

  • says :
    I will aware of diesel from now
    Posted 17-11-2014 22:12

  • says :
    Thanks for this great information
    Posted 17-11-2014 22:10

  • says :
    Posted 09-07-2014 08:16

  • says :
    liked the article
    Posted 31-12-2013 01:02

  • says :
    i really didn't know this
    Posted 22-12-2013 22:29

  • says :
    I didn't know that.
    Posted 20-12-2013 01:47

  • says :
    Now i know much more about the diesel engine
    Posted 16-12-2013 20:46

  • says :
    I will say to my dad to use clean diesel
    Posted 23-11-2013 03:54

  • says :
    Didnt know that much clear informations thanks for sharing them to us,i am impressed
    Posted 21-11-2013 04:46

  • says :
    Gud one
    it is great
    Posted 16-11-2013 00:22

  • says :
    very informative, thanks for sharing
    Posted 31-08-2013 04:50

  • says :
    thnx for information
    Posted 30-08-2013 12:05

  • says :
    much required information to me
    Posted 30-08-2013 12:05

  • says :
    cool information given and thanks for your kind knowledge!!

    Posted 11-08-2013 17:43

  • says :
    i didnt know. thanks for your information
    Posted 11-08-2013 09:51

  • says :
    clean diesel seems a boon to the world
    Posted 25-07-2013 22:12

  • says :
    thanks for the information about the clean diesel
    Posted 20-07-2013 18:20

  • says :
    clean diesel is what i was studying in newspapers these days
    Posted 19-07-2013 12:36

  • says :
    This is very informative
    Posted 18-06-2013 22:50

Rohan Kapur

  • Rohan Kapur says :
    Good piece of Info.
    Posted 16-06-2013 21:17

  • says :
    Because it was the newest information at the time it was uploaded:)
    Posted 25-02-2013 10:23

  • says :
    Why didn't I know this before?
    Posted 22-02-2013 15:02

  • says :
    Why not? You can search it from the internet :)
    Posted 25-01-2013 09:24

  • says :
    Nice and informative report, thanks for sharing, is this clean diesel available in india?
    Posted 14-01-2013 06:14

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