What they are doing with the RR is a little more involved then just valve timing. It is also throttle control. Opens a whole new door to what can be done with an engine. Most of what I know is hearsay. Do you have any links on this stuff?
Gary
Gary, the quote is from the bottom of page 6 of this string.
I couldn't find any info on the net. But the ramifications are rather obvious, by contolling engine speed via valve timing, BMW (Rolls Royce) can map ideal cam profiles for each rpm under various loads, that alone is a benefit of enormous magnitude. Then consider that without a throttle butterfly in the intake system, the intake manifold operates at near atmospheric pressure, rather than under a vacuum, the engine no longer has to draw air from a plenum under a vacuum. This is truly amazing technology, and it's not the last you'll read of it. It will become more widespread as time goes on. The technology is expensive, I'm sure that's why BMW chose to install it on the Rolls first. When I first read of this over a decade ago, BMW's plan at the time was to install it on their motorcycles first.
The "other" technology being developed for the IC engine is direct fuel injection (DFI), i.e. injection of the fuel into the combustion chamber rather than into the intake manifold.
Mark & LPB, I appologize, it appears this thread has been officially hi-jacked.
shanghai George
quote:BMW has been working on that for over a decade. Using electrically operated valves. Their goal is to control engine rpm via valve events and to eliminate the throttle butterfly from the intake system. Doing so eliminates the low pressure (vacuum) in the intake manifold downstream of the throttle butterfly. The engine makes more bhp since the cylinders are filled with a denser charge of air, and gets better fuel economy since the pistons are not working against as much vacuum on the intake stroke. All sorts of advantages to your system, so get to work & beat BMW to the patent office!
your friend on the PIBB, George
I couldn't find any info on the net. But the ramifications are rather obvious, by contolling engine speed via valve timing, BMW (Rolls Royce) can map ideal cam profiles for each rpm under various loads, that alone is a benefit of enormous magnitude. Then consider that without a throttle butterfly in the intake system, the intake manifold operates at near atmospheric pressure, rather than under a vacuum, the engine no longer has to draw air from a plenum under a vacuum. This is truly amazing technology, and it's not the last you'll read of it. It will become more widespread as time goes on. The technology is expensive, I'm sure that's why BMW chose to install it on the Rolls first. When I first read of this over a decade ago, BMW's plan at the time was to install it on their motorcycles first.
The "other" technology being developed for the IC engine is direct fuel injection (DFI), i.e. injection of the fuel into the combustion chamber rather than into the intake manifold.
Mark & LPB, I appologize, it appears this thread has been officially hi-jacked.
shanghai George
George,
Will they have to resort to a vacuum pump to operate those devices normally vacuum actuated (brake booster, etc.)?
Michael
Will they have to resort to a vacuum pump to operate those devices normally vacuum actuated (brake booster, etc.)?
Michael
There you go George:
http://pantera.infopop.cc/eve/forums?a=tpc&s=817005...030095873#6030095873
Gary
http://pantera.infopop.cc/eve/forums?a=tpc&s=817005...030095873#6030095873
Gary
quote:Originally posted by george pence:
Mark & LPB, I appologize, it appears this thread has been officially hi-jacked.
shanghai George
Lastpushbutton, what was the S# on your Pantera? Were there any GTS or GT5 pushbuttons?
Gary
Gary
No it is I who should apologise. It is I who has lead this thread atray. I apologise to LPB. This is entirely my fault.
quote:Originally posted by DeTom:
No it is I who should apologise. It is I who has lead this thread atray. I apologise to LPB. This is entirely my fault.
I don't think anyone needs to apologise, that's the way conversations go. That is why we are all here, and that is why we have the ability to start new topics including starting topics again that diverted if parties are still interested in it.
Gary
Michael,
The electric vehicles that I have had the opportunity to peer under the hood all had small vacuum pumps for supplying vacuum accessories. However power brakes can also be operated hydraulically (existing technology) or with electric servos.
Accura already uses electrcally assisted power steering in the NSX.
Another advancement being developed for our autos is higher voltage electrical systems, this is neccessitated by the move towards electric powered vehicles, higher voltages means less current, which allows the various motors to be sized smaller & lighter. In the future, power brakes, power steering, etc will all be elctrically assisted. BMW has an alternator that is built into the circumference of the flywheel, and it is designed to be used as the starter motor as well. That will turn up in their cars when they make the jump to a high voltage electrical system. Which is in the not too distant future. Ford is also working on high voltage electrical systems. I'm sure most manufacturers are.
your friend on the PIBB, George
The electric vehicles that I have had the opportunity to peer under the hood all had small vacuum pumps for supplying vacuum accessories. However power brakes can also be operated hydraulically (existing technology) or with electric servos.
Accura already uses electrcally assisted power steering in the NSX.
Another advancement being developed for our autos is higher voltage electrical systems, this is neccessitated by the move towards electric powered vehicles, higher voltages means less current, which allows the various motors to be sized smaller & lighter. In the future, power brakes, power steering, etc will all be elctrically assisted. BMW has an alternator that is built into the circumference of the flywheel, and it is designed to be used as the starter motor as well. That will turn up in their cars when they make the jump to a high voltage electrical system. Which is in the not too distant future. Ford is also working on high voltage electrical systems. I'm sure most manufacturers are.
your friend on the PIBB, George
quote:Another advancement being developed for our autos is higher voltage electrical systems, t
These systems are also one wire systems going to a central computer where they are signal or amp/voltage trigered. Saves on build cost. They put almost half as much wiring in a car.
Gary
Gary,
Heck, I'm never going to get any work accomplished today! LOL
What you are referring to are the sensors & actuators. They will be "smart" devices, each with an "address" and they will communicate to the associated computer via a single data highway. Yes, that is the future.
The control systems that automate the plants where autos are manufactured are already using similar technology. That's my trade, industrial control systems.
your controlling friend on the PIBB, George
Heck, I'm never going to get any work accomplished today! LOL
What you are referring to are the sensors & actuators. They will be "smart" devices, each with an "address" and they will communicate to the associated computer via a single data highway. Yes, that is the future.
The control systems that automate the plants where autos are manufactured are already using similar technology. That's my trade, industrial control systems.
your controlling friend on the PIBB, George
George, In the MGB, I am building servo control circuits. I am getting rid of the heater "cable controls". They always bind and strip the control. It is not as advanced as the single wire system but hopefully better then the clunky linkage they had in the car.
Gary
Gary
Gary,
Can the servo control you're building be adapted to any cable operated system? What about vacuum operated systems?
Michael
Can the servo control you're building be adapted to any cable operated system? What about vacuum operated systems?
Michael
Michael, I am using R/C servos like this:
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXN610&P=0
This one is 224oz/in tq. I am constructing circuts to operate them but you can buy circuits already made. All you would need would be a voltage regulator. It is not plug an play. Certainly experimental.
Gary
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXN610&P=0
This one is 224oz/in tq. I am constructing circuts to operate them but you can buy circuits already made. All you would need would be a voltage regulator. It is not plug an play. Certainly experimental.
Gary
Michael,
there are a couple of electronic heater controls on the market that I am aware of. The name I'm capable of remembering at this time is Vintage Air:
http://www.vintageair.com/catalog.asp
This link takes you to their catalog index, from there select page 27 or 34
There is a Pantera owner in So Cal who has retrofitted a GM system, I can't remember the name right now, I have the info at home. If you're interested let me know & I'll look it up tonight, he has info & pictures on his web site.
Gotta go, your friend on the PIBB, George
there are a couple of electronic heater controls on the market that I am aware of. The name I'm capable of remembering at this time is Vintage Air:
http://www.vintageair.com/catalog.asp
This link takes you to their catalog index, from there select page 27 or 34
There is a Pantera owner in So Cal who has retrofitted a GM system, I can't remember the name right now, I have the info at home. If you're interested let me know & I'll look it up tonight, he has info & pictures on his web site.
Gotta go, your friend on the PIBB, George
Thanks Gary and George.
I was just curious, it's not something that I'm going to run out and do tomorrow. It sounds like something interesting to find out more about.
Michael
I was just curious, it's not something that I'm going to run out and do tomorrow. It sounds like something interesting to find out more about.
Michael