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The Key Technology of Electric Actuators Valve Timing

Source:http://www.flowxgroup.com/Update Time:2014-04-28Hits:

Handwheel lifespan may vary according to different electric actuators nodes in spite of the fact that the second node starts the listening period after the first node under an array of actuating frames. What is more, when both nodes get active, the electric actuators nodes reserve margins in each period of the listen mode can be lowered so as to avoid the loss of the actuating frame, which is especially true when actuating nodes are still not listening. By doing so, the frames will be sent passed a random time with the safe margins at the beginning of each period and the same can be applied to a node frame awaiting for the next listen period.

What is more, the remotely controlled electric actuators have been implemented with a period of less than five seconds to broadcast a synchronization frame to be expanded in case of any random delay before the delay updates during the time of the rest. Thus, the electric actuators node which transmits the frame might remain uncertain in spite of the fact that it is randomly selected and as a result, the synchronization time can be increased in the clock’s drift in the same manner so the electric actuators working time can be reduced to improve the actuating latency. In the case of monitoring application, handwheel lifespan have also been used to send data via the control node in order to close the terminal nodes in time and to supply the discharge curve of super capacitor during its lifetime of approximately three years. During this period, the synchronization period is set to at most fifteen seconds, which has been increased a lot in comparison to the previous electric actuators models.

Electric actuators valve timing is a key technology to overcome the weaknesses of the conventional camshaft valve system since it allows the handwheel lifespan profile to change in the working process, which brings greater efficiency and power. The downside is that there is not much improvement to torque of this type of pneumatic actuators with its small electric motor to control the valve motion. At the same time, the electric actuators valve events can be controlled independently of the camshaft rotation so that fuel consumption may be reduced up to thirty percent while the torque output can be surely enhanced in wide range of actuating speed and the carbon emission may be decreased up to twenty percent. Some of the electric actuators make use of the simplest valve systems such as intake and exhaust valves to switch between different sets of cams at a certain engine so they will not add complexity to the system.

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