Locking-type multi-mode four-rod variable valve driving system
A drive system, multi-mode technology, applied in the direction of engine components, machine/engine, valve control, etc., to achieve good reliability, reasonable design, and improve the possibility of practical use
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[0038] The invention relates to a locking multi-mode four-bar variable valve drive system. The opening timing of the intake / exhaust valves in various modes is very different, which requires a very large angle of phase adjustment when switching between various modes. The current common vane-type VVT mechanism cannot meet the requirements, but can meet the requirements The electric VVT mechanism is expensive and cannot be widely used in the short term; another example is that the opening duration of the intake / exhaust valves varies greatly in various modes. If a mechanical continuously variable valve control mechanism is used alone to achieve a small opening duration Otherwise, the maximum lift of the valve will be very small, and it is difficult to meet the indicators such as inflation efficiency and pumping loss at the same time. If the hydraulic valve control mechanism is used alone to achieve it through oil drainage, the system of the hydraulic valve control mechanism at hi...
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