2012年10月19日星期五

Continuously Autocom cdp pro variable valve timing technology

Valve timing variable technology is  Autocom cdp pro  by far the easiest, lowest cost and the most common variable valve mechanism. However, its performance and the effect is minimal, but fuel-efficient emission reduction technology just is not a performance orientation.

Basically, this technique is mainly change camshaft positive. For example, at high speed, the intake camshaft will rotate forward past 30 ° ahead of time the intake valve opens. This action by the engine management system (ECU and sensors), according to the engine load and speed conditions issued a directive, and then perform the action is driven by a hydraulic element.

I want to emphasize here is the valve timing, variable technology can not change the duration of the valve opening. It can only reach the valve to open as early or late opening of the role. But early opening early off, that is to say the duration of the valve opening unchanged. Furthermore, it is not going to change  
Wholesale obd2 tools the valve lift, unlike variable cam valve technology. However, the valve timing, variable valve technology is the easiest, lowest-cost technology, because each camshaft just need a stepping hydraulic drive, unlike other systems need to set up an independent body to complete the action in each cylinder.

The angle variable process is divided into continuous and discontinuous:

Relatively simple version fixed the preset angle only 2-3 to choose from, such as 0 ° or 30 °. The state-of-the-art system will provide continuous angle optional, which means you can select any one of the angles between 0 ° to 30 °, depending on the current engine speed. Obviously, so you can at any engine speed can provide the most appropriate valve timing to bring greater flexibility of the engine. In addition, the smooth transition between the two angles have people difficult to detect.

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