الموضوع: الفرق بين محرك ياباني و ألماني

Power = torque * speed

each engine has a power and torque curve plotted with the speed.

the performance of the engine is seen from these curves.

all the new technologies are working to change the shape and the trend of these curves.

to increase the power and torque of the engine we must do one or all of the following:

1 increase the engine speed

2 increase the volume of the engine

3 increase the quantity of the air entering the engine and so increasing the amount of fuel to be burned.

many enviromental and economic restrctions stop the increase of the engine cylinder volumes; so number two above is stopped in the developments.

so the engine makers has two ways to increase the output torque and power of thier engines; by the speed or the mass of the air entering the engine.

you can see now the BMW M5 is 10000 RPM, honda S2000 8000 RPM, and the VW now TSI engine with turbo and superchargers and direct injection

the main problem in increasing the speed is that at high speeds the time is very small for the valves to open and the air enters the combustion chamber is very small, thats why at high speeds the power and torque is lost, and this is called Engine Breathing.

just like you when u run and run if u run fast u cant breath , so in the engines if it cant breath well it will not give more power, so Honda in 1989 solve this problem with the Vtec technology and all others come later after Honda. the most important issue that many people forget about it is the reliability of the technology; the honda technology has no waranty cliam at all from the Vtec technology amazing isn't it.

المشاركة الأصلية كتبت بواسطة Ahmad Allawy

للأسف كلامك غلط ..
حسب الموتور التكنولوجي بتاعته ايه.. و القوة القصوي بتاعته بتخرج امتي و قد ايه..
يعني اكيد التسارع و الكلام ده الكامرس او الموتور ال2000 سي سي هيكتسج الموتور ال1600..
لأن قوة الموتور اعلي بكتير ..

لا انا مش مع حضرتك هو بيعتمد على تصميم الموتور والعربية(الاير ديناميك) بتعتها يعنى خلينا فى مصر هنا لو اسبرنزا موتور 2000 سى سى بتشد مع bmw 1600 فى رأيك كدة انهى الى هتسبق وتسارعها احسن

ملاحظة واحدة بس...

بنفس السعة الترية

الياباني هورس بور اعلى (قدرة حصانية)

الألماني تورك اعلى (عزم)