Forgive my ignorance.... what is "pinging"

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Forgive my ignorance.... what is "pinging"

jdillon

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What exactly do people mean when they talk about pinging with regard to an engine? And whats "knocking"?

Forgive these newbie questions
 
its the same as pinking,its not to serious. knocking is rythmic banging thats bad like broke big ends

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Pinking occurs when you use a fuel with an octane number too low for an engine. As fixit has said, it is auto/pre-ignition before the spark, usually due to heat and high pressure. The higher the octane number, i.e. 95 (standard unleaded), 98 (super unleaded), 105+ (in racing cars for example), the less likely that this will happen in high temperatures and pressure. The way fuel companies solve the problem is through extra branching on the hydrocarbons/ using lead compounds within the fuel which is now obviously not done. The exact chemistry behind why lead achieved this is unknown and was used as you probably know for some time before its posionous properties realised.

I never thought A level chem would be useful!

Paul



My first signiture (a lot of thought put into it): If you can't find the switch to switch your fogs off I am sure I can help you! Damn fogs.
 
Please don't mention that word James, it sends shivers down my spine. The memories of Gs, Ss, Hs and so on are not nice ones :(. However if you are struggling with it too, only when you get to the end and they actaully show you the one useful equation do you see the light and have that eureka moment.

<font color="violet">
. o O Helz O o .

Proud owner of a silver Baby Brava with a Smiley air freshener​
</font id="violet">
 
Oh I can't wait to do a Chem Eng degree, hehe!

All this excitment to come, waho!

My first signiture (a lot of thought put into it): If you can't find the switch to switch your fogs off I am sure I can help you! Damn fogs.
 
That sounds fun Paul, always wondered what you were going on to do next. Warning - this level of physics was while studying pharmacy, dread to think of what you'll have to do. While you're at it, can you design a nice super-fuel for us please?

<font color="violet">
. o O Helz O o .

Proud owner of a silver Baby Brava with a Smiley air freshener​
</font id="violet">
 
I would love to get onto the hydrogen fuel cell band wagon but I don't think I will graduate in time. ALternative fuels is definately my highest interest. I did a physics practical (15 hours+) on wind generators. I can't do much on it before then because I can't exactly mock up a hydrogen fuel cell in my shed!

I am not sure about fun but I think it is best for me. I can do physics and maths fairly well and my skill in chemistry, although not up to the others is still fairly good. Out of curiosity, would you tell me where you studied Helz?

I should really do a phsics degree. It's weird, I never really work too hard for physics, I find it gets very tedious very quickly and hate how one minute you're thinking about a massive building then the next a photon in the middle of space. However, I still come out with good marks, as good as my maths, but I never class myself as strong in it.

I should be going to UMIST (manchester) myself or Nottingham if I want to. UMIST course is much better for me. I only know one person going to do pharmacy (at oxford) called Diane. She is from china and extremely clever and will do very well in it. She is in the top mathematicians at my age in the country but she just refuses to do a maths degree. I bet you think pharmacy vs. maths is an easy decision too.

My first signiture (a lot of thought put into it): If you can't find the switch to switch your fogs off I am sure I can help you! Damn fogs.
 
Quick word to Paul - think about what you'll be doing AFTER the degree and whether you'll continue doing it. And what the pay's like :)

My degree in Electrical and Electronic Engineering is only useful for my hobbies, which involve dabbling in electronics, but has no use for my work in Software Engineering ...

Steve the geriatric Panda and Beagle freak

G781 TUT: White Panda 1000CL - 31-08-1989 to 09-03-2004 (may she rest in pieces :()
J154 FMX: Red Panda 750L in good condition - waiting for me to rescue it :)
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Currently cycling 16 miles a day to work and back :)
not by choice as my car is no more :(
 
Steve, that was my main problem and still is. I don't know right now and although it sounds awful, i don't care an awful lot. If I want to in the end, a PhD will put off those thoughts for longer!

Chem Eng is the highest earning of all strands so if i do chose to go into that field then I shouldn't have too many problems.

If i hate it with a passion, or I will have to do is go into finance!

Thanks for your words of caution however, most appriciated.

My first signiture (a lot of thought put into it): If you can't find the switch to switch your fogs off I am sure I can help you! Damn fogs.
 
Well, whatever you do, don't work at Siemens. The pay's pathetic :(

Steve the geriatric Panda and Beagle freak

G781 TUT: White Panda 1000CL - 31-08-1989 to 09-03-2004 (may she rest in pieces :()
J154 FMX: Red Panda 750L in good condition - waiting for me to rescue it :)
--------------------------------------------------
Currently cycling 16 miles a day to work and back :)
 
but has no use for my work in Software Engineering ...
Most modern EEE courses are 30% computing. And with the maths in EEE, programming just comes naturally.

But anyway, with most technical degrees (Eng, Maths, Phy, etc.) it all becomes too much of a muchness after a while about deciding what you _CAN_ do after that. A degree is much more than the actual course content, and unless you really specify yourself with something like Law or Accounting, you can pretty much go into whatever direction you wish.

And for the original topic, http://auto.howstuffworks.com/question90.htm <-- is a good read.

<font face="Verdana">-- T.
<font color="maroon">'98 Marea Weekend ELX (1.8 16v).</font id="maroon"></font id="Verdana">
 
I studied at RGU in Aberdeen which has a good rep. for clinical stuff (about how medicines work and interact) and aseptics (making medicines without any risk of contamination to yourself or the medicine). Yes, it's easier than maths, it's more useful and you have a guaranteed job at the end of it - I'm sure your pal has made the right choice.

I also thought about going down the PhD route but once I was out in the real world (and having spoken to a few PhDs who totally regretted wasting time) decided not to bother and to go for more practical qualifications instead. Ok, so it means I'll never be Dr Helz or be an academic, but I hope to succeed out on the 'shop floor' so to speak and one day would like to do an MBA. We'll see.

I also agree with ts86net that it does open up a lot of avenues. Although strictly speaking it wasn't a hard science degree, pharmacy can still be used for a lot of science jobs (especially if you went to a uni that did a very scientific course - mine didn't).


<font color="violet">
. o O Helz O o .

Proud owner of a silver Baby Brava with a Smiley air freshener​
</font id="violet">
 
No! Thermodynamics is horrible stuff!!

Just finished 5 weeks in hell doing that..Now really glad that Ive got a year at most (If Im lucky) before doing it again!

Ample time to read up methinks...

Erm,If yure interested, my 1st yr course went as follows:

Heat, Work and Energy considerations
Ideal Gases, pV=mRT
Heat Engine Cycles (Carnot Cycles) and reversible processes
Carnot Engines, Heat\pumps and refrigerators
Air-Standard cycles (4 Stroke and 2 stroke, incl lecturer showing off a piston he had melted a hole through by altering a 2-strokes "Squish factor" too much, and Diesel cycle[?])

Interesting but impossible to get yer head round....

Oh as for pay, Went to and IMecjE lecture on weds...advised that average earnings for Incorporated (IEng) or Chartered (CEng) Engineers is c. £50k! (based on IMechE suurvey)...winner I'm thinking:D

Tom (AofB)

GrpN Catback Exhaust system is here...just need to get the bleeder on now!!
 
"average" is the key word there. How many years of experience before one will actually earn that?

<font face="Verdana">-- T.
<font color="maroon">'98 Marea Weekend ELX (1.8 16v).</font id="maroon"></font id="Verdana">
 
Funnily enough, Steve, I'm doing a degree in Electrical and Electronic Engineering...and was thinking of applying for a placement at Siemens...[:0]

I'm doomed!!

------/F/I/A/T/------

Fart In A Tin
<font color="orange">1994 Punto 55SX, metallic red, small, Italian and beautiful! </font id="orange">
 
Chem eng is the highest earning branch, nah nah! And I get to wear a hardhat, wahoo!



My first signiture (a lot of thought put into it): If you can't find the switch to switch your fogs off I am sure I can help you! Damn fogs.
 
Originally posted by JonnyBoy
Funnily enough, Steve, I'm doing a degree in Electrical and Electronic Engineering...and was thinking of applying for a placement at Siemens...[:0]

I'm doomed!!
Pay, it's all relative. Mine's the average for an engineer with 3 or 4 years experience. Shame I've been there 31 years [:0]

Anyway do it. I'm sure it's pretty good for the experience. You'll learn all about German business practices. Not sure if that's good or bad :)

In any case, I'm talking about Siemens Communications in Beeston, Nottingham. Siemens is all over the country ...

Steve the geriatric Panda and Beagle freak

G781 TUT: White Panda 1000CL - 31-08-1989 to 09-03-2004 (may she rest in pieces :()
J154 FMX: Red Panda 750L in good condition - waiting for me to rescue it :)
--------------------------------------------------
Currently cycling 16 miles a day to work and back :)
 
I realise i is all relative - as I said before, I will probably end up in some boring accountancy job!

Siemens are an odd company. They seem to do ok but with my experiences (and yours), I don't quite know how.

I mentioned before to you that I had done my Young Enterprise at Siemens last year. Well, I quit after about 3 months from being the "managing director" of "Indecisions", partly because my company was made up of lazy High School idiots and partly because of the people at Siemens. There were about 5 helpers, all of which promised to come to each meeting bar 1 who would have a holiday that week (i think that was the agreement). We were provided with a "conference room" which, I don't know if you will know where it is, considering the size, had its main enterence next to a bowling green. You went inside two double stairs, I think there was a canteen on the left. You walked up the stairs to the left and went down that corridor. I can't believe that the room they gave us would be used by Siemens, it was horrid and grotty! It had awful carpet, awful curtains, was freezing and was very much worse for wear.

I could complain all day about the idiots in my group but I would prefer to talk about the team helpers. I believe one was "head/assistant head or something of human resources" A littlish man in his mid 50's. He came about 6/10 of the time and wasn't too bad. Lacked a little idea about the world but hey, don't we all?! The next guy was a tall blond guy, called Jann/Yan/Jan or similar. A nice guy, came 2/10. The next guy was hilarious, head of product development or similar. Late 50's, showed his age, white hair, would be retiring soon, probably a smoker in his past. He seemed ok, once I said to him when no one was doing anything on a break or something:

"So, without giving too many top secrets away, what's siemens top project at the moment"
He thought for a moment then replied "A LAN phone"

Haha, he thought, this guy won't know what a LAN is, so I nicely replied:
"So what would be the advantage of using a phone over network cabling instead of conventional phone cables"
oh no you saw his face say, then he came out with surely a big piece of rubbish: (looking at me as if to say "are you dumb or something, why can't you work it out?!"
"It means businesses can have less cabling"

I thought, wow, the best product he can tell me about will mean less cabling in a building, despite the fact wireless is coming into the networking world. Not impressed. He walked out every evening a few metres into his huge, silver Mercedes estate. Oh he came about 3/10.

There was another guy who was really good, I didn't like the way he sometimes took over too much but at least he helped unlike the rest. I wish I could remember his name.

I remember we had a training session at, guess where, yup, the High School! None of my team would go, even though we were all expected to attend, even though it was straight after school in their own school! I made th eeffort and went, alone out of 10. You know what? Every other team had 3+ helpers with them, none of mine turned up. I quit the week after in disgust of it all.

I know this is all rubbish experience and I don't know why I am typing it out. ALl I am trying to get accross I guess is that the world can be so unfair in who gets paid the most for being some of the worst people. I know these guys are important and busy, but why make promises that they cannot keep? Or is this the way all business happens at Siemens, i.e. lacking efficiency and thought?


Sorry that this is some kind of random and odd rant to the wrong people but talking about Siemens made me think about all my wasted time doing YE.

My first signiture (a lot of thought put into it): If you can't find the switch to switch your fogs off I am sure I can help you! Damn fogs.
 
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