The Variable Valve Event & Lift System (VEL) continually adjusts valve events and lift amounts, making highly fuel-efficient engines with high torque and clean emissions possible.
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| Purpose | ||
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To control valve events and lifts in order to reduce intake and exhaust resistance that leads to energy loss within the engine.
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| Features | ||
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Improved fuel efficiency and engine torque
Fuel efficiency and engine torque have been improved by substantially reducing intake resistance, which conventionally occurs when the throttle valve of an engine running at low revs is closed. Improved throttle response
Throttle response has been improved by directly controlling the amount of intake with the intake valve rather than the throttle valve, where it has conventionally been controlled. Reduced HC emissions
By reducing the amount of valve lift when the engine is running at low revs, the intake flow rate is increased and full combustion becomes easier. This reduces emissions of hydrocarbon (HC), which can be produced during partial combustion cycles. |
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| System structure |
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A rocker arm and two types of links close the engine valves by transferring the rotational movement of a drive shaft with an eccentric cam to the output cam. The movement of the output cam can be varied by rotating the control shaft within the DC motor and changing the fulcrums of the links. This makes a continuous adjustment of the valve lift amount possible.
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| Benefits | ||
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