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    • 18. 发明授权
    • Variable valve timing control device for an engine
    • 用于发动机的可变气门正时控制装置
    • US5469818A
    • 1995-11-28
    • US403093
    • 1995-03-13
    • Mamoru YoshiokaHaruyuki ObataKen TanoueYoshihiro IwashitaToshimi KashiwaguraMakoto SuzukiHiroki IchinoseHironori Okamizu
    • Mamoru YoshiokaHaruyuki ObataKen TanoueYoshihiro IwashitaToshimi KashiwaguraMakoto SuzukiHiroki IchinoseHironori Okamizu
    • F01L1/34F01L1/344F02D13/02F01L13/00
    • F01L1/34406F02D13/0215F02D13/0234F02D13/0261F01L2201/00F02B2275/18F02D2041/001Y02T10/18
    • The variable valve timing control device according to the present invention controls the valve timing of the intake valves of the engine based on the optimum valve timing at the full load operation of the engine. Namely, the variable valve timing control device of the present invention determines the valve timing in accordance with the combination of the present engine load and the present engine speed in such a manner that the deviation of the valve timing from the optimum valve timing when the engine is operated in full load at the present speed does not exceed a predetermined maximum allowable value. Since the valve timing of the engine is always set within a range determined by the maximum allowable deviation from the optimum valve timing for the full load operation, when the engine is accelerated to the full load condition the amount of the change, i.e., the amount of the operation of the variable valve timing control device is kept always within the range determined by the maximum allowable deviation. Therefore, the time required for changing the valve timing to the optimum valve timing for the full load operation is always short regardless of the present operating condition of the engine. Consequently, the response of the valve timing control can be improved without increasing the operating speed of the variable valve timing control device.
    • 根据本发明的可变气门正时控制装置基于发动机的全负载运行时的最佳气门正时来控制发动机的进气门的气门正时。 也就是说,本发明的可变气门正时控制装置根据当前的发动机负荷与当前的发动机转速的组合来确定气门正时,使得气门正时与发动机的最佳气门正时的偏差 以当前速度的满载运行不超过预定的最大允许值。 由于发动机的气门正时总是设定在与满负荷运行的最佳气门正时的最大允许偏差确定的范围内,所以当发动机加速到满负荷状态时,变化量即, 可变气门正时控制装置的操作总是保持在由最大允许偏差确定的范围内。 因此,无论发动机的当前运行状况如何,将气门正时改变为满载运行的最佳气门正时所需的时间总是很短。 因此,可以提高气门正时控制的响应,而不增加可变气门正时控制装置的操作速度。