can someone please tell me what the new honda accord has been nicknamed?

Excellent engineering discussion

Ivvie and Midas,

I think you fellas have slightly similar views but very divergent on practicalities. I will lean towards Midas line of argument though. I am not a Mech Eng, my background is in industrial chemistry but I do understand quantum mechanics and thermodynamics.

Ivvie when you relate heat exchanges/build ups to wear and tear and assume that a 6 cyl engine will wear faster than a four cyl eng, you are negating the fact that a 6 cyl eng will do less work that a 4 cyl engine on the same car over the same distance and conditions. The same applies to gear ratios as well. You also forget that materials change with each design.

This discussion, I believe can also be related to the varying engine sizes of the same car make of same amount of cylinders. The smaller the size of engine the more work it does, especially at take off. I.e. a 1.8L 4 cyl Honda will do more work over all than a 2.3L same type of Honda under the same conditions. The price to pay is more fuel consumption especially at very low speeds.

My dad had a Volvo 240 of 2.3L engine capacity back in the days and there was a time that the engine block needed grinding by about 0.10 (whatever the measurement was). My brother and I took the car to the mechanic and there was a disused 2.1 engine block lying around and after examining the block, we found that although the block was useless to a 2.1 piston, the holes could be ground to 2.3. We discovered that the thickness of the 2.1 block was more than the thickness of the 2.3 block and that boring the 2.1 to 2.3 would be the equivalent of having a 2.3 from the onset. We went ahead with our plan and I can tell you that the old war horse was back on the block like in the old days and gave at least 8 more years of active service of dusting other cars,

My point ; a 2.1 engine became useless in a 2.1 setting, but found a more active life in a 2.3 setting and out gunning other 2.1 engines and with little effort. Generally speaking, bigger engines last longer than smaller engines on the same car.

I believe that the longevity we are referring to here is the longevity of the engine components like engine blocks, crank shafts, top cylinders, valves and the head gaskets.

My lay man point of view though.

Naija people know book sha !

Well all these dogonturenchi I dont understand but what I know is that I have both i.e V6 and I4 and I can attest to the high performance of v6 anyday. Rev the I4 the same way you rev the v6, your neighbour will label you Apa (spoiler). When I read here that mileage limit of Honda car is 130,000 miles I rushed down to check my own and the v6 is reading a nice 182,412 miles not kilometres. Infact it was Cotonunised from US at 134,111 miles and rated grade A at Berger at that time. Men, grammar apart, even my mechanic is ready to deposit money against the day I will sell it. The car is still riding cool and super quiet. You dont hear the engine working even with the aircon on. If the car is still performing like this at over 180000 miles, I wonder how it was doing at below 50,000miles. Our inhouse specialists can help us by coming down to our level.

My practical experience with this thread is from the Atlanta interstate 85 highways:

Making 80 miles/hr on a 4-cylinder BMW car- you'll notice the extra hard work being done by the vehicle, but make 80-100 miles/hr on 6-cylinder 325is, you'll barely notice that the car is doing any work at all.

@Ivvie
Too many words with too many meanings.

Ivvie:

My point is that high compression engines wear quicker due to work, higher heat and different materials. I had use those terms to explain my point. I did not state that any engine was inferior but a con of the V6 engine to the 4 cyl.

If this comment is completely true, then how do you explain a diesel engine (vey high compression engine) which will always outlast a similarly sized (engine capacity) petrol engine

I assume that you must be well schooled and grounded in book but you need to uderstand that you do not possess all knowledge. And the simple fact is that your statements are ambigious an misleading. The above quote is a typical example. I will not go further to prove to you what I have just said. Its up to you to come down to earth and, as we say in naija, "try to know person!!"

@Middas02
You get time o!!!

The answer to the question was stated very early in the thread. But some people don tif the thread wan show say na dem sabi book pass. And after all is said and done, dem contributions sef, person no fit use. A beg let matter rest jooo!!

who no know go know!

Big up to both Midas and Iyvie. I'm a chemical engineer so i know you guys were not spouting gibberish.
Midas, if you have differences don't start hurling insults; it's petty and churlish.
When i make my views on practical engineering known i look forward to them being challenged.

You guys are good as far as am concern, brilliant also, I surely know that somebody btw you is getting some thing wrong.

every engineering filed has it own rules and protocols if you dont follow it, then the product built from it can never be certify or acceptable all over the world.

Surely we need references and theory to backup implementations process but sometimes real world experience change the way situation is.

my area of specialization is information technology 'networking', i read and read theory 'die' when i started but when i enter field i see one or two different.

if some one will agree with me here that documentations sometimes changes and new ones are emerge so i will urge us to upgrade our old documentations to newer ones as equipment built in the 21st century are built on new technology.

the reason why am following this thread is because i just got a tokubo honda accord 2000 and not v6 with about 85k millage and am here somebdy is telling me is design for 130k millage , haaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa i don 'die' oh,

make you guys agree and settle on your mechanical cars jargon or i will go and return it and get my refund back oh and buy the one that is design for 500k millage 'lol'

May God help us. Midas02 & Ivvy

Midas & Ivvie, You have both displayed a wide range of both academic [/b]and [b]technical competencies [/b]in your field of study. [b]That's great. I do not know most of what you have both mentioned but am sure most nairaland members who have had the opportunity to read through now know better about combustion, V6, 4 Cyl, pistons, Hp etc. I love you both.
Thanx very much. I have said it here on nairaland that we should come up wit a way of giving awards [/b]for good posts, but [b]Seun or anybody for that matter has said nothing about it.
Thanx though.

KUDOS to you guys,
you have educated us all,
bury the hatchet ana move on,
the painful thing is the fact that SIENA went AWOL when it mattered most.
SIENA must apologise to NAIRALANDERS whenever he returns.

KUDOS to you guys,
you have educated us all,
bury the hatchet and move on,
the painful thing is the fact that SIENA went AWOL when it mattered most.
SIENA must apologise to NAIRALANDERS whenaver he returns.

^{I surprise say Proo, Sultan and Siena never show up,}

@ Midas02 and Ivvie (nairaland auto internet professors) ^{plus anybody wey dey flash their respective certification}.

All this una gra gra, una still no fit build una own moto. Una dey here dey slaughter una sef with SAE, ACE, this law, that law sotay person wey dey ask question sef don run, leave una comot.

First, I fit tell say una know book well well. Me, nah ordinary vulcanizer i be, but wetin different with me and professor wey go plenty school yet dey stammer up and down nairaland like person wey chop slap from Yellow fever, or the one wey fit nak engine block tory ooooh only to use am sell second hand moto from America.

Abeg make una perch.


That's why me i like yahoo boys------no long talk.

^{leaves-----rolling tire to the bus stop.}

While i would thank Midas for the knowledge passed across, I am patiently looking forward to hearing from SIENA, the only acclaimed and award-winning nairaland resident automobile specialist. Siena, pls we need your seal on this matter. Cheers.

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First of all, this is not an engineering discussion because Ivvie is writing NONSENSE He must be a sophomore or junior engineering student who hasn't quite understood the subject matter or some copy and paste jocky with little or no vague idea about engineering. I mean copying poorly formed partial differential equations from God knows where.  Equivocating, maybe prevaricate may be a closer word, on the 2nd Law of thermo. He had no understanding of the role of entropy in a sytem, heat or otherwise.  For me this was the biggest herring. When people use big big grammer and cryptic jargon when asked really simple question, you can quickly tell that there are trying to hide their ignorance.  Thank God I have an engineering background or I would have been bamboozled by charlatans like this Ivvie guy.

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Fellow Nairalanders, I came across this information relevant to the current discussion and so decided to paste it here:

How Are 4-Cylinder and V6 Engines Different?

The number of cylinders that an engine contains is an important factor in the overall performance of the engine. Each cylinder contains a piston that pumps inside of it and those pistons connect to and turn the crankshaft. The more pistons there are pumping, the more combustive events are taking place during any given moment. That means that more power can be generated in less time.

4-Cylinder engines commonly come in “straight” or “inline” configurations while 6-cylinder engines are usually configured in the more compact “V” shape, and thus are referred to as V6 engines. V6 engines have been the engine of choice for American automakers because they’re powerful and quiet but still light and compact enough to fit into most car designs.

Historically, American auto consumers turned their noses up at 4-cylinder engines, believing them to be slow, weak, unbalanced and short on acceleration. However, when Japanese auto makers, such as Honda and Toyota, began installing highly-efficient 4-cylinder engines in their cars in the 1980s and 90s, Americans found a new appreciation for the compact engine. Even though Japanese models, such as the Toyota Camry, began quickly outselling comparable American models, U.S. automakers, believing that American drivers were more concerned with power and performance, continued to produce cars with V6 engines. Today, with rising gas prices and greater public environmental awareness, Detroit seems to be reevaluating the 4-cylinder engine for its fuel efficiency and lower emissions.

As for the future of the V6, in recent years the disparity between 4-cylinder and V6 engines has lessened considerably. In order to keep up with the demand for high gas-mileage and lower emission levels, automakers have worked diligently to improve the overall performance of V6 engines. Many current V6 models come close to matching the gas-mileage and emissions standards of the smaller, 4-cylinder engines. So, with the performance and efficiency gaps between the two engines lessening, the decision to buy a 4-cylinder or V6 may just come down to cost. In models that are available with either type of engine, the 4-cylinder version can run up to $1000 cheaper than the V6. So, regardless of what kind of performance you’re looking to get out of your car, the 4-cylinder will always be the budget buy.

One final note: It’s not a good idea to try to install a V6 engine into a car model that comes with a standard 4-cylinder. Retrofitting a 4-cylinder car to handle a V6 engine could cost more than simply buying a new car.

My reference is http://auto.howstuffworks.com/engine9.htm .

I think this should throw some light to the present discussion b4 SIENA arrives.

Cheers.

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A senior, Aha ahah, I was close enough - that is if you are indeed a senior. It seems you may need to get some clarification on some concepts before you leave college. All these things you have written take it to your professors, infact don't, show it to your friends they will be kinder. Let me point out some of the flaws in your writing I was able to pick up:

You wrote

There are 4 processes in a heat engine that constitute a cycle.
Wknet = [1 to 2]ΣpδV + [2 to 3] ΣpδV + [3 to 4] ΣpδV + [4 to 1] ΣpδV or
Wknet = [1 to 2]∫pdv + [2 to 3] ∫pdv + [3 to 4] ∫pdv + [4 to 1] ∫pdv with [x to x as integrating from to].

This is a meaningless bunch of partial diff eqtns. One takes the summation of differentiatials, the other integrates over some imaginary x, make up your mind are yu looking for the rate of change or are you for some volume, surface area etc. what are you trying to achieve this equation in the context? I sincerely hope
you were not trying to describe the carnot cycle because that would absolutely inane.


You wrote :

2nd Law of Thermodynamics
I don’t know where you got your second law of thermodynamics from.
I will state the law and explain it.
The 2nd law states that no heat engine can produce a net work output by exchanging heat with a single fixed-temperature region.

Midas wrote:

The entropy of an isolated system which is not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium.”

Midas' definition is absolutely correct, although genereic it is more descriptive and captures the essence of the 2nd law. Yours is a subset as applied to a specificfield of study. This was my red flag. Yu simply did not understand what you were writing about. All your definition means is that, yu need a temp difference to do work. To do work is to increase the entropy of the system until a new steady state is reached. However there is a net entropy increase between the state before work was done and afterwards.

You wrote:

Now you are referring to entropy in the definition of the 2nd law. Entropy is abstract because it seems not to relate to a basic experience because it is a measure of unavailable energy in a system. The greater the entropy of a system, the less available is that system for doing work or transferring heat.

It seems you don't fully understand the principle behind entropy. Abstract in concept but practical in neally all systems. The degree of disorder. A low temp system has less entropy than a high temp system. so if you add heat to a lower temp system yu increase the entropy more than so for a high temp system ata molecular level. (2) Entropy tends to increase as you add engery to it, that is why you virtual every system tend to degrade with time, including humans - why we grow old - organs fail etc,

You wrote :

In mechanics, as the system increases in volume it can[b] perform work [/b] but also has a reduced capability to perform other work.

This is a very silly statement. Please don't say it outside!

You wrote:

What this tells you is that there is a restriction placed on heat engines. Heat added Qadd and heat rejected Qrej must be nonzero. All required for a heat sink is to be at 0 Kelvin.

This looks omimously like the First law of thermodynamics - " The amount of Energy in any system is conserved ". What has 0 Kelvin got to do with this - na wa oh!!

You wrote

ηT = (1 – (TL/TH) * 100
as TL = 0. It is impossible to reach 100% efficiency because heat rejected must be 0. You will need a PMM2 to convert 100% of heat to work.

What on earth is TL and TH??!!!! Even if TL tends towards 0, why is it impossible to reach 100% efficiency from that mathematical equation. It is possible to to resolve that equation such that 100% is reached. Are you worried about dividing by zero? Have you ever heard of L'hopital's rule? Have you ever heard of boundary value problems!!! I think i know what you are trying to say here but your presentation is off-beat and makes it difficult to understand - not scientific enough


I would like to continue this debate, but time no dey my hands. Go back and understand the concepts you have learnt over the last 4yrs, it seems some are wishy-washy for you. A word is good enough for the wise.

Odabo o'

SIENAAAAAAAAAAAAAAAAAAAA
SIENAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
OLUWASIENAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
How many times did i call you?
If you fail to interve within the next 24hrs,
I WILL,

















































, not read your posts again! shikena.

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I no know book, wetin you wan make I say?
If person o know something he better make person dey quiet, or I go make fool of myself.

IMHO I6 better than V6 is better than  I4
Lower rpm and I6 has better balance(less vibration)

-- Middas02


I think  you both (yourself and Ivvie) had good arguments. Personally, I think your arguments were more convincing. However, I would suggest that in the future you should refrain from getting personal whenever you are involved in an argument. As far as I am concerned I liked how you both presented your arguments and they were enlightening and perhaps educative.

The facts can be cross checked and deduced by anybody who has the slightest inclination in science and mechanics.

But it is alway nice to provide (perhaps non-savvy) readers with references.

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Hey common which part of my statement?
First, second, or both?

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Guys,
i think we've had enough of this, obviously, both of you are sure whiz-kids on the block. DPRESIDENT wants a candid advice, and surely he is getting more than bargain for. IVVIE and MIDAS02, cud u guys please list the advantages and disadvantages of a 6 cylinder engine and a 4 cylinder engine.
Whatever you guys comes up with would just be enough for DPRESIDENT and and ppl like me who wants to buy a V6 engine Camry for my wife.

thanks.

I don't normally reply to post. but i can't stop laughing when Qimpex said and i quote "Painful, in the sense that I would have made more money selling it in the US than in Nigeria. You win some you lose some!" there is no way my friend that you will sell the car for more in the US.

I really appreciate the in-depth knowledge of Ivvie and Midas. To me, both know what they are saying and are ready to prove it. Just may be, one person needs to hear the other out and reason along. You just might be surprised that they may be saying the same thing in different ways. As to Midas, you only wanted to prove an argument and u don't have to rain insults at the other person. Be a professional you claim to be.

You---Pssword ( or whatever you name is), it will be better for you to understand a line of argument before you talk here, don't just participate because you want to feel among. Nobody is taking sides here and there is no street fight here. You might want to go to Oshodi to do that. These are learned and experienced people arguing what they both think they know out. If you know anything or you want to support, come out in the same vein and let's hear you out.

We are all matured (or I think we all are) and so must behave as such.

Lots of people have attested to the fact that they benefited immensely from the argument in question, so did I. BTW you pursued the poster in question(dpresident). He only asked for an advise. I guess the guy has picked what he needed from your arguments leaving you both to your showoffs (putting it mildly).

pls.
can we have advantages and disadvantages listed out here?
just that and period, and call it END OF DISCUSSION

rgds.