Valla ben motorumu okudukça gider diyorum.1,2 kullananlar olarak sizinde motorunuzun argo sine bakmanızı tavsiye ederim.
''There is an aluminum cylinder head with integrated water-cooled exhaust manifold to reduce exhaust temperature. The cylinder head has 16 valves (2 intake and 2 exhaust valves per cylinder) and double overhead camshafts driven by the timing chain. Engineers seriously worked on intake ports designed and achieved a strong tumble flow inside the cylinder which improved combustion speed. They also applied sodium-cooled valves. Valves itself are actuated via roller rocker arms equipped with hydraulic lash adjusters. The exhaust camshaft also drives a vacuum pump for the brake booster and turbocharger control. The intake camshaft drives the high-pressure fuel pump by an additional 4-lobes cam of the camshaft. The engine has Toyota’s VVT-I for the exhaust valve timing and VVT-iW (continuous variable valve timing) for the intake timing. On top of the head, there a cylinder head cover made of aluminum. The high-pressure fuel pump for direct injection is also attached on top of the engine. It delivers fuel to the forged iron fuel rail under the pressure 2.4-20 MPa, and after that, directly into the cylinders by slotted nozzle injectors (several times at the cycle). The name of that Toyota’s fuel injection system is D-4T.''
Bu sadece soğutma için yapılan çalışma
Hani bu almanyadaki gtr videosunu biliyorsun sinanın.Onda da sodyum cooled valve var öyle diyeyim.
The Variable Valve Timing-intelligent Wide (VVT-iW) allows the engine to switch between the Atkinson and Otto cycle: start in the Otto cycle; switch to the Atkinson cycle at low and mid-rev operation to reduce fuel consumption; back to the Otto cycle at high engine rpm for more power. With the last loss-reduction technologies and improvements in cooling and turbocharging, Toyota’s 1.2-liter turbo engine produces maximum thermal efficiency of 36% - one of best results among mass-produced gasoline engines.
D-4S engine uses a water-cooled
single-scroll turbocharger with a
classic wastegate valve control. The water-cooled exhaust manifold in the head allows cooling the exhaust gases before its entering to the turbocharger what favorably affects the durability of that unit. The turbocharger has own cooling system with the independent circuit, radiator, and an electric water pump. Charged air goes through a water-air type intercooler. The coolant flow in intercooler is managed by electric pump speed and controlled by ECM.
Son paragrafta da gücü klasik tek scrollu bir turboyla kombine etmişler.Tüm yatırımı soğutma ve verimliliğe yatırmışlar.Toyota düşük hacimli turbo yapınca böyle oluyor
Yazının linkini atıyorum okumak isteyenlere:
http://www.motorreviewer.com/engine.php?engine_id=138