Range Rover schools BMW in diesel tech

dixy2k · 01-11-2015, 08:11 PM

Impressive car and numbers, but what really caught my eye was how RR managed to clean the exhaust gases and keep the engine clean too (i.e. no CBU).

http://blog.caranddriver.com/diesel-...-u-s-for-2016/

"There’s also a new low-pressure exhaust-gas-recirculation (EGR) setup; this particular system recaptures exhaust gases after the diesel particulate filter; most EGRs pull the gases directly from the hot exhaust manifold before feeding them back into the turbo."

mefferso · 01-12-2015, 02:49 AM

You mean to tell me it is mechanically possible to recirculate post dpf clean air as opposed to soot filled air? How dare they?!?!

Yeah, that's great stuff. Does look like an awesome engine with very nice numbers. How about they then combine that with what cummins can do which is use a Rotary Turbine Control valve to "...act as a throttle in the exhaust stream, raising the back pressure to act as an exhaust brake when the driver lifts off the accelerator. This throttle mode can also increase the work done in the cylinder, in turn elevating exhaust-gas temperatures to burn off the soot that’s been captured in the diesel particulate filter."

I kind of assume that by doing this there will no longer be a need to dump fuel in there during regen to raise EGT's.

Cummins engine info source : http://blog.caranddriver.com/next-ge...diesel-engine/

9mmkungfu · 01-12-2015, 07:43 AM

I think the X5 does that on the high pressure EGR side, which the 335d does not have.

dixy2k · 01-12-2015, 10:44 AM

X5 has two EGR's. Low pressure and high pressure.

m80theWolf · 01-12-2015, 04:39 PM

Also, the range rover's engine is at least 6 years newer than our engines (not sure how long the m57 has been around in Europe)... That said, if I were spending money on a range rover, I'd be all over the diesel sport model

taibanl · 01-12-2015, 05:31 PM

Quote:

Originally Posted by m80theWolf

Also, the range rover's engine is at least 6 years newer than our engines (not sure how long the m57 has been around in Europe)... That said, if I were spending money on a range rover, I'd be all over the diesel sport model

I believe the base m57 was introduced somewhere around 2001

01-11-2015, 08:11 PM	#1
dixy2k Major 89 Rep 1,151 Posts Drives: 335d Join Date: Nov 2009 Location: CA iTrader: (0)	Range Rover schools BMW in diesel tech Impressive car and numbers, but what really caught my eye was how RR managed to clean the exhaust gases and keep the engine clean too (i.e. no CBU). http://blog.caranddriver.com/diesel-...-u-s-for-2016/ "There’s also a new low-pressure exhaust-gas-recirculation (EGR) setup; this particular system recaptures exhaust gases after the diesel particulate filter; most EGRs pull the gases directly from the hot exhaust manifold before feeding them back into the turbo."
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01-12-2015, 02:49 AM	#2
mefferso Second Lieutenant 44 Rep 239 Posts Drives: 2010 335d Join Date: Feb 2014 Location: Covington, Louisiana iTrader: (0)	You mean to tell me it is mechanically possible to recirculate post dpf clean air as opposed to soot filled air? How dare they?!?! Yeah, that's great stuff. Does look like an awesome engine with very nice numbers. How about they then combine that with what cummins can do which is use a Rotary Turbine Control valve to "...act as a throttle in the exhaust stream, raising the back pressure to act as an exhaust brake when the driver lifts off the accelerator. This throttle mode can also increase the work done in the cylinder, in turn elevating exhaust-gas temperatures to burn off the soot that’s been captured in the diesel particulate filter." I kind of assume that by doing this there will no longer be a need to dump fuel in there during regen to raise EGT's. Cummins engine info source : http://blog.caranddriver.com/next-ge...diesel-engine/ __________________
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01-12-2015, 07:43 AM	#3
9mmkungfu Captain 229 Rep 932 Posts Drives: 335d, 535d, 750i, X5 35d Join Date: Sep 2014 Location: United States iTrader: (1)	I think the X5 does that on the high pressure EGR side, which the 335d does not have.
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01-12-2015, 10:44 AM	#4
dixy2k Major 89 Rep 1,151 Posts Drives: 335d Join Date: Nov 2009 Location: CA iTrader: (0)	X5 has two EGR's. Low pressure and high pressure.
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01-12-2015, 04:39 PM	#5
m80theWolf Private 3 Rep 96 Posts Drives: 2011 BMW 335d Join Date: Mar 2014 Location: Long Beach, CA iTrader: (0)	Also, the range rover's engine is at least 6 years newer than our engines (not sure how long the m57 has been around in Europe)... That said, if I were spending money on a range rover, I'd be all over the diesel sport model
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