Patent ID: 6035819
Filing Date: 2000-03-14
Classification: F01L

Abstract:
A variable valve timing controller using an operational fluid for valves of an internal combustion engine comprising:a rotational shaft for opening and closing the valve;a rotation-transmitting member rotatably mounted on the rotational shaft;a pressure chamber formed between the rotational shaft and the rotation-transmitting member;an advance chamber formed in the pressure chamber to advance the valve timing by expansion thereof;a delay chamber formed in the pressure chamber to delay the valve timing by expansion thereof;a vane supported by either one of the rotational shaft or the rotation transmitting member and for dividing the pressure chamber into the advance chamber and the delay chamber;an advance fluid passage communicating with the advance chamber for supplying and discharging the operational fluid;a delay fluid passage communicating with the delay chamber for supplying and discharging the operational fluid;a locking mechanism for holding the vane in the middle of the pressure chamber until the internal combustion engine starts; anda damper for sealing up one of the advance chamber and the delay chamber and for slowing the relative rotation between the rotational shaft and the rotation-transmitting member.