VQ25DE engine in improving intake efficiency and Inflatable Jumpers reduce exhaust resistance has done a lot of article, the main way to reduce friction.
The engine of the chain system, camshaft and crankshaft polishing treatment using Advanced Micro Devices, to reduce friction and reduce noise. In order to improve noise, vibration, and brutal, such as performance, the engine used to support beams. VQ25DE engine intake and exhaust valves are used without tappet at the top, and to increase the DLC (diamond-type carbon compound) coating to reduce friction. Piston skirt is used asymmetric shape design; piston top ring using a physical vapor plating PVD coating technology to meet the greater spark advance angle, thereby increasing the torque. Piston rod head a conical design to reduce weight. Connecting rod cap bolts tightened to adopt and modify the diameter of connecting rod cap bolts and connecting rod length, in order to reduce piston Inflatable Jumpers side force (lateral force, and will lead to cylinder wear).
Because of C-VTC continuous valve timing control system and NICs Nissan Variable Intake Control System, VQ25DE engine power increased.
The location of intake camshaft driving conditions based on continuous control, crankshaft angle models from previous generations of 35 degrees increased to 45 degrees. Driven to increase the scope of control of the output torque increases.
Exhaust Manifold plastic manufacture, to reduce intake resistance and reduce weight. Intake Manifold on the Explorer, double-valve power. Power by controlling the two valves, a variety of engine speeds to improve volumetric efficiency. At medium speed range, the power valve closed and in this case, the exhaust stroke pressure wave across from the cylinder does not affect the intake stroke. Therefore, in progress, the role of gas channel, the inflatable efficiency increased. On the other hand, at high-speed range, power valve to open, in this case, the intake stroke of the pressure wave across from the cylinder and the Inflatable Jumpers exhaust stroke have resonance, therefore, inflation has also increased efficiency |
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