This is just the right time to wish you all well.
Ours is a dangerous pastime.
We travel about the highways and negotiate all sorts of obstacles, some of which can kill us.
Governments and local councils have us in their sights too, for we have money.
There have been changes this year. There will be changes next.
I write to you from the largest manufacturer in Europe.
We are very grateful for everything that you have done for us, and we for you.
RESPECT to Honest John for this site. He pays for all this.
See you at Easter.
Sean Kirby
Diesel Group Engineering Manager
Volkswagen GMBH.
|
Hear, hear.
Including all, including those we no longer see.
|
|
|
|
Sean, no further posts till Easter?
|
No my friend.
I'm working all over the place.
Ingoldstadt mainly. Then Wolfsburg, then into the heat in Spain, with Seat.
There are things happening to diesels that will blow petrolheads away.
I'm probably in bother now for saying this, but we have had breakthroughs.
I'm an English bloke, well a Yorkshireman, anyway. My team have really delivered this year.
The new Golf is one of mine, in certain variants. It's bodily more like a Seat (I think) but the diesels are very good. By me, I really mean us. I have rarely posted anything here that was my own idea. My name is legion, as there are many of us.
Read between the lines, my friend.
|
|
Sean, too late at night to read between the lines!
|
|
|
Congrats on your work on the new Golf diesels - I was given a boggo diesel Touran yesterday as a courtesy car, whilst my current 110 TDi Golf was being serviced, and it was a big leap forward in refinement. I was most impressed; the only fly in the ointment (as in the new Polo) was amount of road roar on typical English roads...
Enjoy your travels!
|
|
|
There are things happening to diesels that will blow petrolheads away.
What? Like a diesel engine that'll rev past 4.5k? ;-)
|
>> There are things happening to diesels that will blow petrolheads away. >> What? Like a diesel engine that'll rev past 4.5k? ;-)
Why bother when you've got power from below 2,000 revs? Not like these multi-valve sewing machines where you are lucky to see any acceleration before 3,500.....
Diesel. It's all torque.
:o)
|
I came across some interesting graphs earlier today:
www.histomobile.com/histomob/tech/2/112.htm
Which gives the power torque curve for the Ford/PSA 1.4 HDI engine. Linear power delivery or what?
And also on the next page:
www.histomobile.com/histomob/tech/2/116.htm
Which shows that below 3500 rpm the 90 BHP Ford TDCi engine has more power than the 145 BHP petrol engine, and for the 130 BHP diesel, the break point is 4500 rpm. Given that most people never get above 3k rpm you might as well have the 90 BHP petrol as it will be quicker in normal driving and use a shed load less fuel.
Granted, I realise that there are some people out there who like to wring the neck of their multi valve petrol engine, but for most drivers diesel exactly fits with their driving style.
I also drooled at the description of the 2.7 V6 HDi - but don't much fancy changing the alternator belt, let alone the single cambelt that drives all FOUR camshafts!!
RichardW
Is it illogical? It must be Citroen....
|
I came across some interesting graphs earlier today: www.histomobile.com/histomob/tech/2/112.htm Which gives the power torque curve for the Ford/PSA 1.4 HDI engine. Linear power delivery or what? And also on the next page: www.histomobile.com/histomob/tech/2/116.htm Which shows that below 3500 rpm the 90 BHP Ford TDCi engine has more power than the 145 BHP petrol engine, and for the 130 BHP diesel, the break point is 4500 rpm. Given that most people never get above 3k rpm you might as well have the 90 BHP petrol as it will be quicker in normal driving and use a shed load less fuel. Granted, I realise that there are some people out there who like to wring the neck of their multi valve petrol engine, but for most drivers diesel exactly fits with their driving style. I also drooled at the description of the 2.7 V6 HDi - but don't much fancy changing the alternator belt, let alone the single cambelt that drives all FOUR camshafts!! RichardW Is it illogical? It must be Citroen....
These graphs don't paint the whole picture - They mearly show maximum power (at a particular engine speed) during a steady-state condition plotted against engine-speed. In reality the transient power curves would be very different (ie lower) as the td would have to wait for the turbo to be producing max boost before you'll see the power shown on the graph, whereas an N/A gasoline engine has no such handicap...
They also don't consider gearing. Peak torque figures are meaningless. Its tractive force that accelerates a car - which is dictated by gearing and HP. If you plotted max tractive force against velocity for a 2.0 gasoline and 2.0 TDCI Mondeo you'll find that the gasoline engined car will produce greater tractive effort throughout the curve because it makes better HP and is lower geared. Its irrelevant if the TDCI is producing more power below 4.5krpm because for a given road speed in a given gear the gasoline car will be higher in its engine speed range and therefore producing more power. I remember reading somewhere that an engine's job is to produce power, let the transmission worry about torque...
To be honest I find gasoline engines MUCH more flexible than TDs, a good 2.0 16v gasoline unit can be driven anywhere between 1000-7000 rpm (especially if it's equipped with VCT) and over 40mpg is achievable under certain conditions. If you try and drive most TD engines under 2krpm they tend to fall over as the turbo's not working - so you effectively have a power band of about 2krpm before it gets all weezy at 4krpm - great!
Swings and roundabouts I guess...
|
Last time I drove a petrol motor I found out where the rev limiter was (well it was a hire car). At 7k rpm this equated to about 70 in second, so where, exactly, are the opportunites/needs for revving anything past the 4k rpm power peak in a diesel car (especially when you get more low down power and hence don't need the revs)?
I guess there are petrol heads and diesel heads and n'er the twain shall meet. I still maintain that for joe average driver diesel suits exactly.
RichardW
Is it illogical? It must be Citroen....
|
Last time I drove a petrol motor I found out where the rev limiter was (well it was a hire car). At 7k rpm this equated to about 70 in second, so where, exactly, are the opportunites/needs for revving anything past the 4k rpm power peak in a diesel car (especially when you get more low down power and hence don't need the revs)?
It's great for getting past lines of diesels stuck behind an artic on a derestricted single carriage-way A-road who can't quite decide which gear to use to over take due to the comedy 2k power-band... Hmmm 3rd and run of go half way past, or 4th and wait for the turbo to wake-up....
|
That's not quite true. Diesels do pull well from low revs. The tdcis don't. Try a citroen 2.2 hdi engine or an old 1.9 td (especially it if it has been chipped). The fiat/alfa jtds also pull well before the turbo cuts in. Diesel didn't stop my dad from overtaking 4 cars at once in such conditions. I drive a 2 litre turbo petrol for the reasons you suggest as diesels don't give the catapult effect that is useful in overtaking briskly. And they don't make all that racket! But 20 odd mpg is the downside...
teabelly
|
|
|
|
>> >> >> There are things happening to diesels that will blow petrolheads >> away. >> >> >> What? Like a diesel engine that'll rev past 4.5k? ;-) >> Why bother when you've got power from below 2,000 revs? Not like these multi-valve sewing machines where you are lucky to see any acceleration before 3,500..... Diesel. It's all torque. :o)
Two words for you - Throttle Response
And two more - Turbo Lag...
|
|
|
Diesel. It's all torque.
And noise, and smell, and asthma-aggravating smoke from the exhaust ~ especially from over-fuelled engines!
--
L'escargot by name, but not by nature.
|
I refer the learned gentleman to my post giving the smoke readings at my recent MOT.....
The overfuelling only really occurs on full throttle so not that frequently. The figures given on my car were better than those of some straight off the forecourt!
Anyway, have you ever grabbed a lungful of the volatiles spewing forth when you refill a petrol car?
|
|
|
|
|
|
|
Sean: have a good time at Audi et al. New design? Might buy another VW group vehicle as I prefer diesel- ah, but I forgot about the dealers.
|
|
|
|
Sean m8 - just noticed your sign-off......
Any chance of an ex-gratia goodwill payment to compensate me for my recent cambelt slip on my \'97, 80K A4 TDi??
Pink fluffy dice....thought not.....oh well, never mind!
Happy Christmas (Sean) everybody! Make it a safe one, please drive carefully and NEVER after any drink, OK? Even the morning after......
--
groups.msn.com/honestjohn - Pictures say a thousand words.....
|
The cryptic Sean is back in full form. No worries, I will have a go at deciphering his message.
"There are things happening to diesels that will blow petrolheads away."
I am guessing that the "blow" refers to a Supercharger aka Blower. Sean has designed a new supercharger diesel. Do I win a new V10 diesel Phaeton for my efforts?.
|
I am guessing that the "blow" refers to a Supercharger aka Blower. Sean has designed a new supercharger diesel. Do I win a new V10 diesel Phaeton for my efforts?.
Well the petrol ones are hardly racing away from the showrooms.
|
|
Beggars can't be choosers, I will gladly accept a petrol version.
|
And early season's greetings to you as well Sean.
You know there is common ground sometimes...the Propulsion Conference...Room 201...there were others too.
We have found something else. It is smoother than anything you have worked on...it is not conventional.
The driver wears a bright suit...I think for the fire risk.
Look out for it in just over two weeks time...you will be amazed. Things are changing.
I think I've said too much.
M.M
|
|
anyone managed to decipher all this yet???
|
|
MM & Sean have both invented radical new engines but don't want to tell anyone. Seems a strange way of not telling anyone to me, but each to their own.
|
|
|
|
MM
Is this the 6 reindeer power version perchance?
Ian L.
|
|
|
|
|
|
Merry Christmas to you too, Sean.
One of the few advantages of not being very bright; it's given me a lot of patience. So I'll just wait and see.
Have a prosperous and inventive 2004.
Hawkeye
-----------------------------
Stranger in a strange land
|
|
|
I was compiling a list earlier of all the people that I have contact with from this site with a view to sending separate festive greetings. In the end, it seemed a very daunting task indeed so I felt it best to do it in one fail swoop.
So, to all I know from this site - indeed to everybody who posts here, be it frequently or rarely - may I wish you all a very merry Christmas, and a happy and peaceful New Year.
All the best
Rob
|
and a Happy Christmas to you, Rob
(now - what are either of us doing up at this time of day ?)
mike
--
Bora - what Bora ?
|
|
I dunno, you're sad both of you. Go to bed.
|
|
|
Merry Christmas and a Happy (and safe) new year to you both, and indeed to all at HJ's.
(don't know about you two, but I should be working!)
Davy S.
Oops, where did that screw go!!
|
Good to 'see' you again, Sean - a very happy Christmas to you and all other Backroomers.
Looking forward to your return at Easter. :)
HF
|
|
Wonder if Sean is being more cryptic than we give him credit for - what crime would give you a 3 month prison sentence? Or is there a series of Big Brother about to start???
|
|
|
|
|
|
