For example, at the start, a cold engine and stationary engine without a load, timing set back 30 degrees. This method would eliminate the overlap. Namely events in and exhaust valves open simultaneously at the end of the drainage step into the new valve will open some time after the exhaust valve is fully closed. Logically, in these conditions the engine does not need extra work. By closing the exhaust valve, no fuel is wasted time getting sucked into the engine. Fuel consumption and engine become more efficient when there are loads environment.while friendly, will forward 30 degrees timing. Degree of overlapping increases. The goal is to help drive the exhaust gas heat plus a mixture of fuel and air intake. Moreover, time is also increased due to compression of the inlet valve closes too early. The effect, so better volumetric efficiency. To that end, there's VVT-i controller on the intake camshaft timing gear. These tools consist of housing (house), then there is room inside the oil to move the vane (vane). Propeller is connected to the camshaft. In it there are two lines of each oil to the oil chamber in the house VVT-i controller. Different from the oil line is, vane will set the valve opening time. Timing advance position to come forward to fill the oil to the rear of each vane blades.
So that the vane will move forward and timing position had come forward 30 degrees. Own the oil pressure supplied by the Oil Control Valve camshaft timing is adjusted by the engine ECU. In contrast, for conditions retard (backward), the space in front of the vane position will be filled and timing back. Meanwhile, if required at standard conditions, there is a pin that will lock the fixed vane position is in the middle. Actually there is a more sophisticated system, called VVTL-i (Variable Valve Timing-Intelligent Lift). In addition to playing time of valve opening, high, too differentiated. The advanced technology VTEC Variable Valve Timing and Lift Electronic Controlled (VTEC) Honda innovation results showing different mechanisms. The main difference is the inclusion of valve movement. In the 16 valve engine, there are two each incoming and exhaust valves in each cylinder. VTEC is applied only on the intake valve. This valve controls the efficiency of the engine more powerful. The assumption, does not require the opening of the disposal process for the current variable valve exhaust, engine work will be more lightly. In the VTEC engine, the second intake valve does not always move together. For example, at low speed there is only one valve is open. Opening is relatively small because the characters are punched camshaft valve is suitable for low speed. This condition is considered appropriate for the machine. Due to the low round of the air supply does not need much. In addition, there could be air turbulence to help mix the fuel. Machine so economical, efficient, environmentally friendly too. As engine speed increased, the need for the air supply is also increasing. Directly answered by the second valve. A larger opening for nok chamshaft have a higher degree of character. Fun, had joined the first valve to open wider. This is due to any pin that connects the rocker arm and push the pin. Will automatically lock the pin was the second rocker arm. Because the second rocker arm actuated by a camshaft duration peak is higher, so it follows the movement of the first valve. In addition there are also VTEC i-VTEC (intelligent VTEC), which also includes the mechanism of ignition advance and rewind. Of maximize results to improve the efficiency of the engine.
