New 2012 RR Ghost, EWB Version

[GMBoy]

Originally Posted By: Brick B-Body
Originally Posted By: GMBoy

As a GM engineer in an assembly plant - I am responsible for a lot of modules and you are correct in that it is very interesting reading. If you are ever in Texas - PM me and I will take you thru a personal tour and overload your mind with tech data lol.

As always - all BITOG friends are also welcome for a personal tour given by me.


Off topic here:

GM Arlington Assembly by any chance? I made the trek out there 10 years ago for the Impalafest. Since then there hasn't been a similar B-Body homecoming event.

Impalafest still goes on yearly, but hasn't been at the Arlington factory for a very long time. What ever happened to enthusiast car shows on the factory grounds?


Yes, Arlington.

We have complained about the same lack of shows. However, our new plant manager (came last year) came from Bowling Green (Corvette) and he is a car nut like us. So far, we have had several nice open houses for the public with car shows. We also sponser the local Corvette Club auto cross races twice a year on the plant grounds. I'd have to ask if there will be another B-Body event as that would be nice!

 

[hattaresguy]

Originally Posted By: G-MAN
Originally Posted By: AEHaas
I had similar literature on the Maybach from around 8 years ago. I am more impressed with the Ghost, RR is clearly a step ahead. They do not advertise advanced engineering as Mercedes does but are clearly right there on top of it.


That's not surprising when you consider the Mayback 57 (W240) and 62 (V240) were based on the S-Class platform (W140) from the 1990s. A lot of Mercedes aficionados still consider the W140 to be the best car Mercedes has ever built, but there's no getting around the fact that when the Mayback was introduced it was essentially a "new and improved" version of a decade old platform.

BMW, in reinventing the Rolls-Royce marque, took an entirely different approach and designed a completely new platform for the Phantom. And with the Ghost loosely based on the current BMW 7 series, that still puts RR 15 years ahead of the Mayback in terms of technology and engineering.


Correct the Maybach was based on the over 20 year old W140 platform.

Part of the reason Mercedes discontinued the Maybach was because the engineers had pushed the old platform to its limits and they would have had to develop a new one from the ground up.

I love the Maybach but for the money I'd rather have an S65 AMG worked over by Brabus and essentially an 800hp custom car. Worked over S class's really took a chunk out of their sales, plus Brabus has a new Apple based electronic package for the rear seat which IMHO is the best you can get right now in any car.

 

[SubLGT]

Originally Posted By: AEHaas
Rolls-Royce NA was kind enough to give me the complete parts diagrams and all the technical training literature on the Ghost model. There are about 50 modules. I put in probably a hundred hours studying these. It is good learning material about the automotive industry as well. It always amazes me how much engineering, detail and design goes into putting just one car into production....................aehaas


did you come across anything interesting or unusual or cutting edge about the engine lubrication system?

 

[AEHaas]

It has a volumetric oil pump that delivers only the required oil flow somewhat dependent on engine load:

3.2.1. Advantage of the volumetric-flow-controlled oil pump
The oil pump absorbs a substantial proportion of engine output. The VANOS in particular requires a high oil volume to adjust the camshaft angle. However, if the VANOS maintains the camshaft angle, no oil flow is required for the VANOS. The oil requirement therefore depends on the scale of the adjustment operations. Conventional oil pumps generate the required oil pressure for the greatest possible oil flow that can occur in the engine. At many operating points, this represents futile energy consumption via the oil pump and superfluous wear of the oil. The volumetric-flow-controlled oil pump only supplies the amount of oil required by each operating range of the engine. In ranges with lower loads, no superfluous oil quantity is delivered. This reduces the fuel consumption of the engine and slows down wear of the oil.

 

[SteveSRT8]

Various strategies by GM and others are employed to do exactly the same thing, ie deliver exactly what is needed and save a bit of fuel as well.

 

[hemitom]

Holy [censored] Now thats my kind of car. I bet it takes a lot of dental work to pay for that.

 

[OVERKILL]

Originally Posted By: hemitom
Holy [censored] Now thats my kind of car. I bet it takes a lot of dental work to pay for that.


Dr. Haas is a plastic surgeon, not a dentist.

 

[hemitom]

My mistake , hows this , a lot of silicone

 

[OVERKILL]

Originally Posted By: hemitom
My mistake , hows this , a lot of silicone


There ya go

 

[SubLGT]

Originally Posted By: AEHaas
It has a volumetric oil pump that delivers only the required oil flow somewhat dependent on engine load:................


Does the water pump also have a demand dependent variable flow?

 

[AEHaas]

The engine coolant is moved by a small belt driven mechanical pump and a 20 W and 50 W electric pumps that run as needed in different parts of the circuit.

aehaas

 

[G-MAN]

Originally Posted By: AEHaas
It has a volumetric oil pump that delivers only the required oil flow somewhat dependent on engine load:

3.2.1. Advantage of the volumetric-flow-controlled oil pump
The oil pump absorbs a substantial proportion of engine output. The VANOS in particular requires a high oil volume to adjust the camshaft angle. However, if the VANOS maintains the camshaft angle, no oil flow is required for the VANOS. The oil requirement therefore depends on the scale of the adjustment operations. Conventional oil pumps generate the required oil pressure for the greatest possible oil flow that can occur in the engine. At many operating points, this represents futile energy consumption via the oil pump and superfluous wear of the oil. The volumetric-flow-controlled oil pump only supplies the amount of oil required by each operating range of the engine. In ranges with lower loads, no superfluous oil quantity is delivered. This reduces the fuel consumption of the engine and slows down wear of the oil.


The new Chrysler Pentastar engine uses a similar oil pump design (as does the new Mercedes V6, since they are essentially the same engine). I think we're going to see more of this as engineers try to eliminate every avenue of parasitic losses.

From pentastar.com:

Quote:
A chain-driven, vane-type variable displacement oil pump adjusts the flow rate and pressure as commanded by the engine management system, which uses a solenoid to drive the pump into low or high pressure mode. For example, below 3,500 rpm, the pump conserves energy by using low pressure; at speeds over 3,500 rpm, the pump switches to high pressure.

A force balance mechanism inside the oil pump adjusts the size of the pumping chambers to alter oil flow. If the oil is cold, the pump reduces the size of the internal chambers. When the oil is hot and thinner, more oil is needed, and a spring increases the size of the pump chambers. This also saves energy.

 

[dailydriver]

Originally Posted By: OVERK1LL
Originally Posted By: hemitom
Holy [censored] Now thats my kind of car. I bet it takes a lot of dental work to pay for that.


Dr. Haas is a plastic surgeon, not a dentist.


Yes, praise the lord (and pass the Veyrons) for vain, .1%er, trophy wife/arm candy women with UNLIMITED amounts of cash to support their esthetic adjunct/'nip and tuck' addictions.