On 02/20/2012 10:10 AM, Signalizacija wrote:
> Aga vietoj triju tikrai butu geriau du. bet ir dvieju cilindru mataras ner
> lengva gerai padaryt. Megsta anas sukaliotis kaip nereikia.
> O referata gali ir neskaityt, gali visa varikliu teorijis kursa pasimokyt

si karta pasitikesiu tuo, ka raso wiki, nes manau, kad pakankamai teisingai:

In a one-, two-, or three-cylinder engine there are times when no power 
stroke is occurring. In a three-cylinder engine a power stroke occurs 
every 240 degrees (720° ÷ 3 = 240°). Since a power stroke cannot last 
longer than 180 degrees, this means that a three-cylinder engine has 60 
degrees of "silence" when no power stroke takes place.

A five-cylinder engine gets a power stroke every 144 degrees (720° ÷ 5 = 
144°). Since each power stroke lasts 180 degrees, this means that a 
power stroke is always in effect. Because of uneven levels of torque 
during the expansion strokes divided among the five cylinders, there is 
increased secondary-order vibrations. At higher engine speeds, there is 
an uneven third-order vibration from the crankshaft which occurs every 
144 degrees. Because the power strokes have some overlap, a 
five-cylinder engine may run more smoothly than a non-overlapping 
four-cylinder engine, but only at limited mid-range speeds where second 
and third-order vibrations are lower.

Every cylinder added beyond five increases the overlap of firing strokes 
and makes for less primary order vibration. An inline-six gets a power 
stroke every 120 degrees. So there is more overlap (180° - 120° = 60°) 
than in a five-cylinder engine (180° - 144° = 36°). *However, this 
increase in smoothness of a six-cylinder engine over a five-cylinder 
engine is not as pronounced as that of a five-cylinder engine over a 
four-cylinder engine*. The inline-five loses less power to friction as 
compared to an inline-six. It also uses fewer parts, and it is 
physically shorter, so it requires less room in the engine bay, allowing 
for transverse mounting.

 From the standpoint of driving experience, five-cylinder engines are 
noted for combining the best aspects of four- and six-cylinder engines. 
They generate more power and torque than four-cylinder engines, while 
maintaining the fuel economy and "pep" of smaller six-cylinder engines. 
Five-cylinder turbos have been used on more than one occasion in sport 
and racing applications for their balance of performance qualities.

>
> "CodeC"<co@co.co>  wrote in message news:jhsuam$70g$1@trimpas.omnitel.net...
>> On 02/20/2012 09:52 AM, Signalizacija wrote:
>>> Arkliui aisku kad L4
>>> http://beta.mokslai.lt/referatai/konspektas/vidaus-degimo-variklia-1-puslapis7.html
>>> kratinys bet gal kur rasi ir daugiau pasiskaityt
>>
>> aciu, bet referatu tikrai neskaitysiu, jei negali dviem sakiniais
>> suformuluoti esmes reiskia pats mazai ka suprati ir sneki bile sneket.
>> as kotais sunkiai sutikciau patiket, kad ta penkta cilindra padaro tam,
>> kad blogiau butu. pagal tavo logika tai vietoj triju cilindru geriau butu
>> du.
>> o siaip - viskas yra kompromisas. I6 irgi kompromisas, nes yra dar geriau.
>> turbo irgi kompromisas, nes yra biturbo, ir t.t....
>
>