Mahindra 2015 answer to EPA TierIV regulations...

[hutchman]

"High Efficiency Positive Crankcase Ventilation (PCV) Technology

Captures gases from the combustion chamber and cleans them before being released into the environment"

Yep, sounds like an EGR to me. I can't get excited about sucking soot into my intake.

I kind of got cracked up reading that link ... They used the word "simple" and "less complexity" a number of times but I get the feeling this thing is anything but simple (and is very complex) to get around not using a DPF.

... that picture of the exhaust reminds me of a pulse ram jet!

 

[Btown]

I may be out of date but the clean diesel vdubs I'm familiar with have dpf with either an extra glow plug in the exhaust and/or urea injection. Typically the lighter Jetta doesn't use urea while the heavier Passat does. They usually do burns after you park ... and make everyone think you're an idiot for leaving your car running. Ah, excuse me, sir, you left your car running. Neither of my TDI's have DPF's but my co-workers do ... and we get people doing that when we go out to lunch.

The 2009-2014 Jetta do not have DEF just a NOX Trap and DPF filter. 2015 jettas, golfs, beetles and 2012 and on passats have DEF and DPF. The fans run when the engine is off because the engine was shut down during a regen. The fans are removing the heat. VW doesn't let u know it is a regen. The usually last only 10 minutes.

 

[woodchipper]

Thank you for all the incoming coments. We all learn as we go; don't we...?
The present consensus would be more like wait and see aproach. Which leads me to think that our engineers are not done and over with those issues. Probably their worst engineering nightmare ever...:mur:!
Would love to hear from new 2015 Mahindra owners here by the way! Any takers?:anyone:

 

[hutchman]

I'm sure its a great engine ... my comments were my personal opinion. Everyone has different goals, risk tolerance, income levels, patience etc.

For me, I tend to keep my vehicles a very long time and do all the maintenance myself. I've learned to pick vehicles with a cult following (VW TDI, F-150 etc., Internet is a great resource) so when something goes wrong (and it will, these things are man made), chances are someone else has already seen it and knows the fix.

I expect my tractor to last even longer than my vehicles so that's my criteria when looking at one.

I always get my own shop manuals etc., because i've also learned I am my own warranty. Not everyone will be as **** and OCD as me (or a tightwad).

 

[MessickFarmEqu]

For what its worth, we in the tractor biz have not had the amount of problems with our Tier 4 stuff that you see in cars and truck. There are some issues out there, but its far from chronic.

There are lots of ways to meet Tier 4 final. The best solution for fuel economy and a long lasting engine will always be Urea + DPF. It is possible to cook up other solutions and everyone will put their own spin on it, but there is no free lunch and every design will have its trade-off's.

 

[drizler]

I'm sitting her in Southern Bavaria right now doing much of nothing. Tomorrow if I can manage to think about it I will drop by a pump here and see what the cetane rating is here in Germany. One thing you have to remember these guys have had this stuff for many many years before we ever dreamed of it. I remember seeing diesels her like the tiny Opel Kadet and even most available US models way back in the 70's. The strange thing is from what i saw on the Autoclub listings the diesel models were always the cheapest of the lot by far. Now days you can get super and reg over here anyplace but diesel is the way to go and has been much cheaper for years now.
I'm no big fan of all this pollution crap but some things make me wonder. Back when I used to live in Denver they had a bus strike right in mid summer. The smog levels dropped significantly and it was obvious just looking across the city. When it was over right back to normal. I used to drive around here in Germany back in the 70' in my patrol car getting blasted in the face by big diesel clouds from trucks and buses. They have theirs pointed right out the side for some reason and at stop lights you got it right in the face. It was nasty. The first time I saw a ultra low diesel bus go by the first thing I noticed was NOTHING when he took off from the bus stop. I walked up there and you couldn't even smell the exhaust. Watching the big trucks where i used to work in the US. you could always see the plumes of diesel going up. Lately all you see is nothing but heat rising. I can't even smell my tractor most of the time and the exhaust is out the side in front. It all has to add up to something good somewhere. The truth is nobody likes paying for it but it sure beats dying of chronic lung disease.

 

[paine]

I'm sitting her in Southern Bavaria right now doing much of nothing. Tomorrow if I can manage to think about it I will drop by a pump here and see what the cetane rating is here in Germany. One thing you have to remember these guys have had this stuff for many many years before we ever dreamed of it. I remember seeing diesels her like the tiny Opel Kadet and even most available US models way back in the 70's. The strange thing is from what i saw on the Autoclub listings the diesel models were always the cheapest of the lot by far. Now days you can get super and reg over here anyplace but diesel is the way to go and has been much cheaper for years now. I'm no big fan of all this pollution crap but some things make me wonder. Back when I used to live in Denver they had a bus strike right in mid summer. The smog levels dropped significantly and it was obvious just looking across the city. When it was over right back to normal. I used to drive around here in Germany back in the 70' in my patrol car getting blasted in the face by big diesel clouds from trucks and buses. They have theirs pointed right out the side for some reason and at stop lights you got it right in the face. It was nasty. The first time I saw a ultra low diesel bus go by the first thing I noticed was NOTHING when he took off from the bus stop. I walked up there and you couldn't even smell the exhaust. Watching the big trucks where i used to work in the US. you could always see the plumes of diesel going up. Lately all you see is nothing but heat rising. I can't even smell my tractor most of the time and the exhaust is out the side in front. It all has to add up to something good somewhere. The truth is nobody likes paying for it but it sure beats dying of chronic lung disease.

Hard to argue with that, although the black diesel you see outbid the exhaust isn't pollution, it's simply unburnt fuel and it will fall right back down the the ground and not stay suspended in the atmosphere. It's the stuff you can't see that you have to worry about. My tractor exhaust also exits out the front right side and it isn't the most pleasant smell after heavy use. I was trying to think of a way to fabricate an exhaust stack for this very reason. I am all more the clean diesel thing, and it has to start somewhere but I don't want to be the beta tester. I am sure as technology improves so will the method of cleaning up the exhaust emissions. Till then I will stick with my stinky tractor, I like the smell for a few minutes of use but after a few hours it gets old and we all know it's not good for you!

 

[hutchman]

There is no "technical" reason diesel is more expensive in the US than gasoline. Diesel is one of the first products to come off the distillation tower and gasoline is one of the last which makes it more expensive. Diesel does compete with other products at the same distillation level and does effect supply (home heating oil, kerosene, plastics, some paints I think etc). It's a processing capacity kind of thing ... we only have so much refinery capability.

Gasoline doesn't compete with much.

The biggest reason diesel is so expensive is due to lawmakers. And since I don't have anything good to say about them I'll leave it at that.

I buy it because even though it costs more; cents per mile is the real measure. My 2002 TDI will consistently do 41MPG in city and 50-52 hwy. My 2006 will do 36 city and 45-47 hwy. That's not the only reason I have them ... I'd rather drive torque than HP any day.

The reason diesels are a premium here is dealerships have a quota or allotment the manufacturer and in some cases the governtment will allow. Supply and demand thing. Until several years ago, to use VW as an example, only around 3% of Jettas coming into the US were diesel. You see more of them today but that is a new development ... the clean diesels.

Update ... a picture ... I like pictures:
What are side products of petroleum distillation? ~ Wiki Mini For Chem

 

[Trillium Farm]

The other reason, IMHO, is that most diesel users are commercials and therefore can write-off the cost of fuel. Greedy petrocompanies are the reason.

 

[woodchipper]

The other reason, IMHO, is that most diesel users are commercials and therefore can write-off the cost of fuel. Greedy petrocompanies are the reason.

I agree on the greed... And cupidity...
Honesty is a step up process; it starts first towards oneself, then expend from there!