bitwood

D4D, D-Cat And D Engines What Is The Difference

Recommended Posts

Attended the dealers today and bought a 2.0 litre 2WD Rav. Test drove both, but felt the 2.0 litre fitted our needs more than the 2.2.

Thanks for all your help and patience.

Share this post


Link to post
Share on other sites
 

Congrats, enjoy your new ride :D

Share this post


Link to post
Share on other sites

Hi, I have a 2012 Toyota rav4 2.2 D-Cat, the fuel economy is around 30mpg average town /city driving, it's pretty poor I think, can the D cat system be removed to increase the economy? Also is it true this engine has an xtra cylinder? 

Share this post


Link to post
Share on other sites
On 3/4/2015 at 8:57 PM, Devon Aygo said:

D-Cat is Toyota's name for a version of a DPF that also includes NOx reduction called a DPNR this uses an additional 5th injector to add fuel into the filter to burn off diesel particulates.

The above is extracted from Devon Aygo's earlier response to this topic. Under the revised MOT that was introduced in May 2018, removal of the D-Cat system, as it is a form of DPF, will mean an MOT failure.

The D-Cat engine doesn't have an extra cylinder, it has a fifth injector.

Share this post


Link to post
Share on other sites
43 minutes ago, Chrisone1 said:

Hi, I have a 2012 Toyota rav4 2.2 D-Cat, the fuel economy is around 30mpg average town /city driving, it's pretty poor I think, can the D cat system be removed to increase the economy? Also is it true this engine has an xtra cylinder? 

Is it two or four wheel drive? Is it manual or auto? IIRC 30 mpg is par for the course but check your exact model on Honest John's  Real MPG site for some comparison figures.

I don't believe that you can remove the D-CAT "system" technically (the more mechanically minded might know better) but it certainly would pass the current MoT if modified in such a way.

No, it's still got 4 cylinders ... 🙂 ... there's a fifth injector used to insert fuel into the exhaust system to be burnt as part of the cat regen system - the regen happens periodically

Share this post


Link to post
Share on other sites

Hi Chris.

I have the same car as you but mine is a year newer, sorry I am not meaning anything by that comment.

My fuel consumption is also appalling also, 30 mpg is not quite achievable in mine , I was expecting at least 40mpg, I wished!.

No the car does not 5 cylinders but it has 5 injectors, the 5th one is in the exhaust but at the engine end, this is to burn off noxious impurities that go down the exhaust system so technically 'waste' fuel to make you exhaust fumes less dangerous.

Just make sure you take your car for a 70mph run on a weekly basis to clean out the exhaust system, it's far cheaper doing it this way then a replacing part of the exhaust system, some Toyota spare parts are prices you just won't believe.

Good luck, Mike.

Share this post


Link to post
Share on other sites

All quoted fuel consumptions are based on EU standards which allow all sorts of tricker and bear no relation to real world figures..

 

(I understood the above several years ago and it has been well publicised by motoring journalists and magazines..Road tests cover that usually in some detail. I never ever buy a car without reading at least two road tests..Ditto any white goods..)

Share this post


Link to post
Share on other sites

Just returned to this forum after a long absence,had a 2006 2.2 136 bhp rav 4,with replacement toyota reworked engine achieving 50 mpg.Now driving 2014 148 bhp 2.2 and only getting 40 mpg.So much for newer cars.!!!!

Share this post


Link to post
Share on other sites
1 hour ago, Badgersdad said:

Just returned to this forum after a long absence,had a 2006 2.2 136 bhp rav 4,with replacement toyota reworked engine achieving 50 mpg.Now driving 2014 148 bhp 2.2 and only getting 40 mpg.So much for newer cars.!!!!

Your 2006 Rav would have only had a basic Catalytic convertor to meet the emissions regulations of the time, your 2014 Rav has been saddled with both a Catalytic convertor & diesel particulate/Nox filter to meet the more stringent regulations. Both of these require the addition of fuel into the exhaust from time to time to Regenerate and clear the filters all resulting in less actual miles per gallon

  • Thanks 1

Share this post


Link to post
Share on other sites

Hi there

I own a awd 2.2 rav4 est 2015 and was told it was euro5 engine but not euro 6 and it wont be aloud on the roads soon because of the emissions. I was then told if i have a D-CAT engine it will be ok? Sorry im confused. Can anyone help me to understand please? Can i do anything to change whats needed in my car to meet with this new requirement?

Appreciate your help.....

Share this post


Link to post
Share on other sites

5 hours ago, Ant225 said:

Hi there

I own a awd 2.2 rav4 est 2015 and was told it was euro5 engine but not euro 6 and it wont be aloud on the roads soon because of the emissions. I was then told if i have a D-CAT engine it will be ok? Sorry im confused. Can anyone help me to understand please? Can i do anything to change whats needed in my car to meet with this new requirement?

Appreciate your help.....

Pop your registration number into this site: http://eurostandards.co.uk/ and it will tell you what Euro emissions standard your engine is certified to. I suspect that it will tell you the answer is 5b but please let us know ...

Also let us know whether your RAV is manual or auto - it may make a difference.

Toyota introduced the marketing term D-CAT when it introduced the corresponding emissions control technology to higher performance engines and automatic transmissions - i.e. the x180s and SR autos. And then subsequently dropped the D-CAT designation once the same emissions control technology was deployed across the range of RAV 2,2 diesels. So, in essence, you will have a D-CAT engine, but without the D-CAT designation. Clear as mud isn't it!

As far as I can tell from the details on my V5 my Euro 5 certified engine satisfies the emissions requirements of the Euro 6 standard but its still Euro 5. Which means it might be banned or charged more to drive into certain cities that I don't particularly want to visit anyway. I'm not aware of any plans to ban Euro 5 vehicles from the road any time soon. Note that the changes to the MoT merely require a car to continue to meet the emissions standards that it was designed to meet. It doesn't retrospectively move the goal posts.

HTH

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...