CONTINUOUS VARIABLE TRANSMISSION

PURPOSE:To enhance the efficiency of a continuous variable transmission by using a pilot pressure driven type high speed clutch and by providing a lock mechanism for the input and output shafts of one of fluid pump/motors so that the other one races when it receives a pilot pressure. CONSTITUTION:In...

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Hauptverfasser: KITA YASUO, NAKAKOJI YOSHIHIKO
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creator KITA YASUO
NAKAKOJI YOSHIHIKO
description PURPOSE:To enhance the efficiency of a continuous variable transmission by using a pilot pressure driven type high speed clutch and by providing a lock mechanism for the input and output shafts of one of fluid pump/motors so that the other one races when it receives a pilot pressure. CONSTITUTION:In a high speed mode in which a high speed clutch 15 is connected, when the speed reaches a predetermined high speed range, a lock mechanism 33 is actuated to lock one 7 of fluid pump/motors. Further, a pilot pressure for changing over the connecting condition of the high speed clutch 15 and a pilot pressure for changing over the operating condition of the lock mechanism 33 are delivered to a logic valve 45. As a result, the valve 45 feeds a pilot pressure P into the other one 8 of fluid pump/motors which therefore races with a small friction resistance. Accordingly, in a lock-up condition, the fluid transmission system constituted by both fluid pump/motors 7, 8 is substantially completely isolated from a power transmission path, and therefore, power is transmitted only through a differential mechanism.
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CONSTITUTION:In a high speed mode in which a high speed clutch 15 is connected, when the speed reaches a predetermined high speed range, a lock mechanism 33 is actuated to lock one 7 of fluid pump/motors. Further, a pilot pressure for changing over the connecting condition of the high speed clutch 15 and a pilot pressure for changing over the operating condition of the lock mechanism 33 are delivered to a logic valve 45. As a result, the valve 45 feeds a pilot pressure P into the other one 8 of fluid pump/motors which therefore races with a small friction resistance. 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CONSTITUTION:In a high speed mode in which a high speed clutch 15 is connected, when the speed reaches a predetermined high speed range, a lock mechanism 33 is actuated to lock one 7 of fluid pump/motors. Further, a pilot pressure for changing over the connecting condition of the high speed clutch 15 and a pilot pressure for changing over the operating condition of the lock mechanism 33 are delivered to a logic valve 45. As a result, the valve 45 feeds a pilot pressure P into the other one 8 of fluid pump/motors which therefore races with a small friction resistance. Accordingly, in a lock-up condition, the fluid transmission system constituted by both fluid pump/motors 7, 8 is substantially completely isolated from a power transmission path, and therefore, power is transmitted only through a differential mechanism.</abstract><oa>free_for_read</oa></addata></record>
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subjects BLASTING
ENGINEERING ELEMENTS AND UNITS
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
THERMAL INSULATION IN GENERAL
WEAPONS
title CONTINUOUS VARIABLE TRANSMISSION
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