gpfs are on some BMWs, and they thankfully dont face the same issues as diesels face with dpf.

 

Remains to be seen, they are new enough age isn't a factor yet. However I'm inclined to believe it's fine as gas EGTs are much higher in general and over injection of fuel doesn't have the same consequences

 

wow, not my experience. whenever i see a diesel vehicle in front of me, even several cars ahead, i put the air recirculation mode on. i frequenrtly see black smoke from even new diesel trucks as they pull away.

how does this not start a fire?

how is this different from the urea (cat pee lol) systems i know are used on at least some mercedes like sprinter vans. a friend brought an expensive big sprinter van... they loved it. until the entire urea reservoir somehow dumped itself into the exhaust system, destroying all of it. took months to get all the replacement parts. they sold it after it was fixed.

diesels only make sense (for now) for towing/hauling very big loads, and sadly, container ships.

 

LOTS of heat shields lol!

The after treatment is a different system with a different goal, the DPF and that is old tech these days and well understood.

Cargo ships would be so much better if they had any sort of emissions controls and even just used diesel fuel, they use fuel oil....

 

It does start a fire....inside the DPF. Additional fuel is injected just upstream of the DPF, where it burns to raise the internal temperature between 500C and 600C. It's held there for 10-15 minutes until all the soot is burned into ash.

If you surmised that this is NOT a good time to park your car on top of a pile of dry brush, you'd be correct.

It's upstream of that. The SCR mixer is in a section of pipe right after the DPF. It atomizes urea into the exhaust flow before it hits the SCR catalyst so that NOx can be removed.

This is also the proof that the DPF is effective at removing particulates. The SCR cat is almost like a 16" deep, highly restrictive air filter element that the exhaust must pass through. With a functioning DPF, it can work perfectly for 500k miles or more. Take the DPF out of the picture and it will completely plug with particulate matter in a few thousand miles.

 

🤣🤣🤣

 

where does the ash go?

maybe they could add a food smoker option with fragrant pellets.

 

It stays there. That's why the DPF eventually reaches the end of its functional life somewhere around 150k miles, where it has to be either replaced or removed and cleaned.

The BMW M57's DPF is considered "full" when it contains 100g of ash.

 

Why not for range? My brother has two BMWs, both diesel, his favourite benefit of diesel is long range. 605 miles per tank on X5

 

Really???? I seriously smell nothing anymore. All Motorweek tests of diesel vehicles you cant see a thing smoke wise when they do pulls for numbers. The trucks (minus the Cummins) are also much quieter.

Or it makes sense if someone just wants one just because they have so much power and are so huge. It's overkill for me but I would absolutely drive a 2500 Sierra diesel. Those have column shifters at least!!! Also, diesels are much more efficient around town than gas models.

 

Range doesn't matter really, you can remax a 25 gal tank in 1:28-3:10 max. In most cars that gets you 500+

 

Most likely you're looking at trucks that have been 'deleted'. It's very common for owners to buy kits that remove the emissions equipment and tune the computer to operate without it. This improves fuel economy, power, and longevity of the engine, while reducing cost of maintaining the emissions system. The flip side is that there's a lot more pollution.


Because the additional costs of ownership make the upside far less than it used to be to own a diesel. Towing power is about the only advantage left. There's a reason light diesels have largely left the US market. The Germans stopped selling them here. Ford and Ram dropped offering then in the 150/1500 trucks. You can basically know get diesels in the heavy duty pickups and the GM 1500 trucks(and suburban). The juice just isn't worth the squeeze.

 

If it wasn't for emissions laws Im guessing diesel cars can get good mpgs like hybrids.

I don't know that to be a fact though, just a guess.

 

In my S Class in the climate screen it shows the air quality outside the car and inside the car, its pretty amazing. The jump when you get behind a truck or something is HUGE

 

Coming to @Striker223 just rolled in garage hopefully much later than soon for a new fuel pump. 😆 Pretty sure the beater Prius ran out of gas today either before I made it to the gas station or definitely while at the station for sure because I had to restart it after filling up and I never shut it off. First click at the pump came after 11.6 gallons. Next slow click came after 11.957 gallons. I drove into the station in EV mode but I noticed maybe .3 -.5 mile prior to station I was in EV mode running 50mph which supposedly not possible. Anything under 45mph yeah but not above. So I drove easy to the station.

At the pump at some point while pumping the gas the hybrid battery got low and I think the engine tried to fire up to recharge the battery but didn’t have enough gas. I just know I had to restart the car after refueling after not shutting it off.

Not sure who’s toyota supplier for fuel pumps but they make some great fuel pumps. I test them all the time. 😆

The air quality was great behind Prius for final half mile prior to ⛽️ station 🙃.