Valve characteristic controller and valve characteristic...

Details Valve characteristic controller and valve characteristic... Valve characteristic controller and valve characteristic...

2008-07-08

2011-10-18

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090160, C123S090170

Reexamination Certificate

active

08037855

ABSTRACT:
When a valve timing is held, even if a Duty value of an operational signal of a variable valve timing controller is slightly changed, a holding unresponsive range will be arisen. In the unresponsive range, a variation speed of the valve timing is very small. As temperature is decreased, the unresponsive range is extended and an individual difference becomes notable. While the valve timing is held, a computer learns a deviation amount of a response characteristic of the valve timing based on a variation speed of the valve timing when the Duty value is slightly changed from the holding unresponsive range to outside thereof.

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