صور BMW Z3 M-power

[lumina]

شباب حصلت صور روعه لـــ : BMW Z3 M-power

http://www.european-imports.net/cars/bmwz3mcoupe.jpg

http://wwwstud.fh-zwickau.de/~ao/g_power_bmw_z3m/1.jpg

http://wwwstud.fh-zwickau.de/~ao/g_power_bmw_z3m/2.jpg

http://www.bmwworld.com/pics/z3/download_03.jpg

http://www.bmwworld.com/pics/z3/download_06.jpg

http://www.bmwworld.com/pics/z3/download_01.jpg

http://www.bmwworld.com/pics/z3/download_07.jpg

http://www.bmwworld.com/pics/z3/download_02.jpg

[S55AMG]

بس اعطينا مواصفات السيارة و سعرها


ياخــــــــــــــــي


:p

[760IL]

itis sweeeeeeeet thanks

[CORVETTE^C5]

رد مقتبس من 760IL
itis sweeeeeeeet thanks

[ايطالي]

عااااديه جدا .. وخلفيتها غبيه .. ويمكن الام كوبية هذي الشكل الوحيد من البي ام اللي ما عجبني

بس هذا ما يمنع انك تقولنا المواصفات:p

[bad95killer]

رد مقتبس من 760IL
itis sweeeeeeeet thanks


تحيــــH+Hــــــــاتي=======>Bad '95 Killer :mad:

[lumina]

حصلت بعض المعلومات :::

المحرك مجهز بنظام double VANOS engine.

وقوة الأحضنه : 321 حصان

وبعض الشرح ولكن بلإنجليزي : عن double VANOS engine.

وهو إختصار لكلمة :


VANOS Variable Cam Timing

VANOS is a combined hydraulic and mechanical camshaft control device managed by the car's DME engine management system.

The VANOS system is based on an adjustment mechanism that can modify the position of the intake camshaft versus the crankshaft. Double-VANOS adds an adjustment of the intake and outlet camshafts.

VANOS operates on the intake camshaft in accordance with engine speed and accelerator pedal position. At the lower end of the engine-speed scale, the intake valves are opened later, which improves idling quality and smoothness. At moderate engine speeds, the intake valves open much earlier, which boosts torque and permits exhaust gas re-circulation inside the combustion chambers, reducing fuel consumption and exhaust emissions. Finally, at high engine speeds, intake valve opening is once again delayed, so that full power can be developed.

كيفية العمل :
http://www.bmwworld.com/technology/vanos_cutaway.jpg

http://www.bmwworld.com/technology/vanos.gif

Double VANOS


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Double-VANOS (double-variable camshaft control) significantly improves torque since valve timing on both the intake and outlet camshafts are adjusted to the power required from the engine as a function of gas pedal position and engine speed.



On most BMW engines that use a single VANOS, the timing of the intake cam is only changed at two distinct rpm points, while on the double-VANOS system, the timing of the intake and exhaust cams are continuously variable throughout the majority of the rpm range.

With double-VANOS, the opening period of the intake valves are extended by 12 degrees with an increase in valve lift by 0.9 mm.

Double-VANOS requires very high oil pressure in order to adjust the camshafts very quickly and accurately, ensuring better torque at low engine speeds and better power at high speeds. With the amount of un-burnt residual gases being reduced, engine idle is improved. Special engine management control maps for the warm-up phase help the catalytic converter reach operating temperature sooner.

Double-VANOS improves low rpm power, flattens the torque curve, and widens the powerband for a given set of camshafts. The double-VANOS engine has a 450 rpm lower torque peak and a 200 rpm higher horsepower peak than single-VANOS, and the torque curve is improved between 1500 - 3800 rpm. At the same time, the torque does not fall off as fast past the horsepower peak.

The advantage of double-VANOS is that the system controls the flow of hot exhaust gases into the intake manifold individually for all operating conditions. This is referred to as "internal" exhaust gas re-circulation, allowing very fine dosage of the amount of exhaust gas recycled.

While the engine is warming up, VANOS improves the fuel/air mixture and helps to quickly warm up the catalytic converter to its normal operating temperature. When the engine is idling, the system keeps idle speeds smooth and consistent thanks to the reduction of exhaust gas re-circulation to a minimum. Under part load, exhaust gas re-circulation is increased to a much higher level, allowing the engine to run on a wider opening angle of the throttle butterfly in the interest of greater fuel economy. Under full load, the system switches back to a low re-circulation volume providing the cylinders with as much oxygen as possible.

و هذا اللي حصلته .... و آسف على الكتابة بلإنجليزي لأني مو لين هناك في الإنجليزي ...:D

[فاهم]

مشكور على الصور السياره هذي كانت سيارة الاحلام ايام الثانويه :D بس مكينتها مشالله حيل قويه على حجمها الصغير اكيد طياره :cool: