BMW to supply Jaguar with Twin-Turbo V8s
#1
The following 2 users liked this post by Kief:
Foosh (07-23-2016),
schraderade (07-24-2016)
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schraderade (07-24-2016),
Smoke Em (07-23-2016)
#5
#6
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jaguny (07-30-2016)
#7
Hmmm . . . speaking of the N63 TT V8, this is interesting in light of our frequent discussions of the F-Type battery mgmt software and the observations of many including myself about the low charging rates when monitored w/ voltmeter:
"As part of its EfficientDynamics push, BMW's cars are loaded with expensive systems to save fuel wherever possible. One of them, the smart-charging system, operates on the premise that you can increase fuel economy slightly by charging the battery only when coasting. Unfortunately, American drivers aren't coasters, we're cruisers, so the system was murdering batteries. BMW's solution was to throw money at the problem, replacing the batteries with Absorbent Glass Mat (AGM) units that can cope with deeper and more frequent discharge cycles."
Enginerdy: Why BMW's N63 twin-turbo V8 eats batteries
"As part of its EfficientDynamics push, BMW's cars are loaded with expensive systems to save fuel wherever possible. One of them, the smart-charging system, operates on the premise that you can increase fuel economy slightly by charging the battery only when coasting. Unfortunately, American drivers aren't coasters, we're cruisers, so the system was murdering batteries. BMW's solution was to throw money at the problem, replacing the batteries with Absorbent Glass Mat (AGM) units that can cope with deeper and more frequent discharge cycles."
Enginerdy: Why BMW's N63 twin-turbo V8 eats batteries
The following users liked this post:
SinF (07-23-2016)
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#8
#9
Hmmm . . . speaking of the N63 TT V8, this is interesting in light of our frequent discussions of the F-Type battery mgmt software and the observations of many including myself about the low charging rates when monitored w/ voltmeter:
"As part of its EfficientDynamics push, BMW's cars are loaded with expensive systems to save fuel wherever possible. One of them, the smart-charging system, operates on the premise that you can increase fuel economy slightly by charging the battery only when coasting. Unfortunately, American drivers aren't coasters, we're cruisers, so the system was murdering batteries. BMW's solution was to throw money at the problem, replacing the batteries with Absorbent Glass Mat (AGM) units that can cope with deeper and more frequent discharge cycles."
Enginerdy: Why BMW's N63 twin-turbo V8 eats batteries
"As part of its EfficientDynamics push, BMW's cars are loaded with expensive systems to save fuel wherever possible. One of them, the smart-charging system, operates on the premise that you can increase fuel economy slightly by charging the battery only when coasting. Unfortunately, American drivers aren't coasters, we're cruisers, so the system was murdering batteries. BMW's solution was to throw money at the problem, replacing the batteries with Absorbent Glass Mat (AGM) units that can cope with deeper and more frequent discharge cycles."
Enginerdy: Why BMW's N63 twin-turbo V8 eats batteries
#10
I am not shure I see the benefits here? Turbo vs twin turbo vs supercharger? More or less bp? better mpg (whats the point in these kind of cars)? lighter engins (a valid point, but could be done by other changes). If this is correct I am qurious to what the real gains are?
Last edited by Arne; 07-23-2016 at 05:46 PM.
#11
The current 3rd generation of the N63 TT V8 is producing 600 HP and nearly 600 ft lbs. of torque w/ no doubt better fuel economy and less weight.
https://en.wikipedia.org/wiki/BMW_N63
https://en.wikipedia.org/wiki/BMW_N63
#12
#13
"... Unfortunately, American drivers aren't coasters, we're cruisers, so the system was murdering batteries. BMW's solution was to throw money at the problem, replacing the batteries with Absorbent Glass Mat (AGM) units that can cope with deeper and more frequent discharge cycles."
a complete solution is attainable. That is, modifying
the software so that it suits the use case.
"Let's keep our engineering and fuel economy edge
... so what if the owner has to buy new batteries."
A sensible and laudable plan. /sarcasm.
#16
It's built in the Ford Bridgend Engine Plant and JLR's contract with Ford is going to expire soon. I guess there is some doubt about Ford supplying once the contract expires.
And Ford keeps putting up the price per engine in the meantime, so i've been told...
There are a few other things that JLR has to give up when the contract expires, the SDD diagnostic system is a big one (it's based on Ford IDS coding) so they've been developing their own software system in the meantime. I believe other software architectures are also having to be replaced, since they have Ford and Volvo origins.
And Ford keeps putting up the price per engine in the meantime, so i've been told...
There are a few other things that JLR has to give up when the contract expires, the SDD diagnostic system is a big one (it's based on Ford IDS coding) so they've been developing their own software system in the meantime. I believe other software architectures are also having to be replaced, since they have Ford and Volvo origins.
#18
They won't lose access to it, just that it won't be updated any more. The final version of SDD will be "frozen" with no further updates for new vehicles. The new diagnostic platform "Pathfinder" will cover new vehicles from MY17 onward, and a select few earlier models once it's up and running (those still under warranty would be my guess).
#19
2nd law of thermodynamics suggests that using electric power to drive wheels directly is more efficient than using it to drive air which then drives wheels. And direct drive assist could do really interesting things to tailor the torque and power curve to get really smooth curves, since electric drive can be pretty much instantaneously adjusted, particularly on torque.
#20
Originally Posted by schraderade
I haven't thought through this before but it seems to me like a supercharged engine with direct electric drive assist (ie electric engine drives wheels rather than the turbo) should yield better performance at lower fuel consumption?
2nd law of thermodynamics suggests that using electric power to drive wheels directly is more efficient than using it to drive air which then drives wheels. And direct drive assist could do really interesting things to tailor the torque and power curve to get really smooth curves, since electric drive can be pretty much instantaneously adjusted, particularly on torque.
2nd law of thermodynamics suggests that using electric power to drive wheels directly is more efficient than using it to drive air which then drives wheels. And direct drive assist could do really interesting things to tailor the torque and power curve to get really smooth curves, since electric drive can be pretty much instantaneously adjusted, particularly on torque.