ghd The difference between different grade gasolin -

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the difference between different grade gasoline

For each car owners, car ownership since the moment, there is one thing to have and his inseparable What is it? The answer of distance, is gasoline, or the precise point that the \Speaking of which may be a lot of friends to laugh at me, cars need petrol to move up, of course, that what is there to question it? Yes! Gasoline for us, then common enough thing, but you really understand the gas? Or are we one step further, you really know your car should be added to what kind of oil? If you are not very understanding, I hope this article we can help you more.

● similarities and differences between between different grade gasoline?
We all know gasoline is divided into all sorts of labels, we often have 90 #, 93 #,[link widoczny dla zalogowanych], 97 #, 98 #, etc., in a few areas also offer 100 # gasoline, then these different label mean? In fact, they describe is deviateent octane number, the higher the octane grade higher that the better antiknock gasoline. So here we have a term derived: RON

◆ What is octane?
gasoline octane number is to represent the ability of anti-detonation of a value, the higher the better anti-knock, then the value is how come?
is simply to practice a mixture of petrol and an artificial standard fuel estimated to the values obtained, the standard fuel, there are two components, one is very good antiknock isooctane, one is poor antiknock heptane, the octane value is set to 100, while the value of n-heptane is set to 0, the two experimental standard gasoline mixture adjusting the ratio to and the actual gasoline antiknock same, and this proshare is what we call the octane. For example, like we used 93 # and 93 octane gasoline, it contains representatives of isooctane and 93%, 7% n-heptane has the same standard gasoline antiknock, so 97 # gasoline and with iso-octane is the standard 97 # gasoline antiknock same.
explained by the above we can see the different grades of gasoline octane number is the difference between the different, and here I need to correct a wrong concept that many of my friends said the daily high-grade cleaner gasoline, cleaner allegations are completely wrong! Should not, represent the octane grade of gasoline, does not mean that gasoline cleanliness!
● How to choose your car oil?
Now we know the difference between the different grade of gasoline, then associated with our immediate problem is how much my car number should be added to gasoline it?

on this issue is related to a 4b1465cdf9d02fharmful0445284c2ffdaa4 parameter of the engine, that is, \The concept may have heard over, but had no real nexus, in fact, this parameter determines what should be added to your car kind of gasoline.
◆ What is the compression ratio?
cylinder compression ratio is the volume before compression and after compression of a gas mixture ratio of gas volume, more detailed, that is to the cylinder when the piston at BDC and the piston cylinder of maximum volume at top dead point the ratio of cylinder volume.

We know the form of four-stroke engines are divided into the intake, compression, work, exhaust four steps, including the intake and toilmanship is at BDC and piston rank, and compression and exhaust is the piston position at top dead center. We demonstrate, for example, when the piston in the cylinder under the dead volume of 10,[link widoczny dla zalogowanych], while the piston is the only point when the volume of the mixture is compressed to 1, then the engine compression ratio is 10.

greater if the engine compression ratio, it means that the pressure of compressed gas mixture is higher, the temperature is relatively higher among the mixture of gasoline is vaporized more fully and more easily burned, when the fully compressed moment of spark plug ignition, after a very short time to release more energy, which energy produced through the combustion piston, crankshaft and other agencies into a final transfer to the wheels as the vehicle forward. If a relatively low compression engine, gasoline vapor molecules is not so doly,[link widoczny dla zalogowanych], so after the spark plug ignition combustion is relatively slow, then the bound section of the life is converted into heat, causing the engine temperature increases, while the vehicle is not completely converted into kinetic energy, so it can be said that under the same cylinder volume, compression ratio manner more power output.
◆ relationshipship between compression ratio and gasoline
Well, above we said a lot of problems on the compression ratio, and gasoline in the end it have anything to do? This is also linked to our articles mentioned in the starting of a problem that antiknock gasoline, gasoline is the ability to resist detonation, deflagration Why would? Because oil and gas mixture into the cylinder, the piston moves up, oil and gas mixture is compressed, and when the pressure increases sharply when the temperature will rise, which is a high school physics class the basics of point, and if at this time of gasoline antiknock not required, will be the spark plug before ignition has started burning, deflagration to form, that is, we usually often say \

『right side of the high compression ratio set, more prone to detonation,[link widoczny dla zalogowanych], so need to use high octane fuel to avoid detonation』
it have any impact on the engine exploding? Obviously, the compression piston is up just a little exercise, there is an upward force, and if the detonation occurs at this time will produce a downward force, then the interaction of two forces on the piston, bound to have a rod, valves, cylinder walls, crankshaft and other components can cause hurt to the engine is very negative.
so we choose what grade of gasoline that is based on the engine's compression ratio to be determined, the higher the compression ratio is also necessary to choose more high-grade gasoline, be9ee7ff99baneful evil72723ad74b9625f19ee5c of its antiknock better, you can withstand higher cylinder pressure, to avoid the phenomenon of deflagration occurred.

Fox
『early years many owners to much trouble knock』
so much what label should choose the compression ratio of gasoline it? Generally, the compression ratio between 7.5 ~ 8.0 90 ~ 93 engine should use gasoline; compression ratio in between 8.0 ~ 8.5 90 ~ 93 should use gasoline; compression ratio in between 8.5 ~ 9.0 93 ~ 95 should be selected gasoline; compression ratio in between 9.5 ~ 10.0 95 ~ 97 should be used gasoline, and these data in the manual of each vehicle will be very clearly marked on the new car to buy hand we must read the instructions carefully.
● accession is not his own label range of the impaction of gasoline on the vehicles?
many friends here will encounter this trouble may be, is the addition of the label is not his own range of gasoline engine vehicles, such as low compression ratio increases the high-grade gasoline, or added high compression ratio low-grade gasoline, then what impact this will have vehicles?

◆ low compression ratio, plus high-grade gasoline
us first discuss the low compression ratio by adding high-grade gasoline engines, first of all for this situation is relatively rare, because of the low compression ratio engines are usually started with some low-end level models, which the emphasis is on low-cost character of the user, so not likely to add more expensive high-grade gasoline.
then joined the high-grade gasoline if it is, is that the engine can be certain that the phenomenon of detostate will not occur because of a lower compression ratio and better meet the anti-knock gasoline, but that does not meant no jeopardize, because there is no cylinder pressure reaches a certain value, high-grade gasoline has not been fully compressed to flammable point, so burning is not sufficient, and therefore it can not fully display the engine strength, not only wasted fuel, but also easy to make the engine produce coke, and some more harm than good.
◆ high compression ratio plus low rank gasoline
another case that is high compression ratio engine by adding low-grade gasoline, and we may be out of car cost reflections, but the impact is obvious, low-grade gasoline reached antiknock less than demanded, the deflagration is destined to produce results, and finally causing the engine failure, also lost sesame watermelon picking things, absolutely can not do!
◆ in the end of the 93 # or 97 # add it?
Here we have a rather special situation, and believe that this situation is confusing for most users, that is, the engine compression Bi Mingming some models are about 10, the proclamation need to add 97 # gasoline, but data vendors are adding more than 93 # and the grade of gasoline, which in turn is why? High compression ratio plus low grade gasoline engines will not be prejudicial to it?

accordance with the principles we discussed earlier scene is indeed the case, of course,[link widoczny dla zalogowanych], engineers for the engine to be more obvious than this one of our relationship, and these models are mainly based joint venture in foreign countries they do is to drink a standard 97 # gasoline, but after the presentation of both the domestic some of the engine is optimized to meet the land as a whole, the oil situation.
These improvements were in hand
engine ignition timing is adjusted, when the low-grade gasoline into the cylinders after compression knock, ECU according to engine knock sensor to detect the burst earthquake situation, the appropriate number of the ignition time slightly delayed, to abate the phenomenon of detonation; the other hand, the concentration of fuel injection ECU will be appropriately reduced, while the lower concentration of gas mixture in the compression ratio does not deviate the situation , the compression pressure within the cylinder after the appropriate reduction, compression ignition mixture is not easy, so that they can also to some extent inhibited the production of knock. Of course, we need to note that that these measures do not mean to clear the detonation, but it lessend to some extent in order to carry out the engine can bear range.
After reading the above analysis, some friends will probably not feel at ease, in fact, do not worry, since the vendors to allow the case of high compression ratio by adding low-grade gasoline, they must have taken long-term tests and experiments, to ensure safe and stable manner of the vehicle, we do not have to worry too much, of course, very much care if you are a car person, with high-grade gasoline is no problem, but costs only.
for gasoline above is my analysis of some simple, everyday we hope to bring some small cars, of procedure, petrol and our cars could not be reached the end of the topic, Finally, we are talking to the point: There are many compression ratio of more than 10 models, both can be added to 97 # gasoline, 93 # gasolength can also be added, then select who would be more economical to do so? This is also a lot of users before the debate.

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