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US4776233A Hydromechanical transmission and hydromechanical speed-change mechanism 失效
机电传动和液压机械变速机构

Hydromechanical transmission and hydromechanical speed-change mechanism
摘要:
A hydromechanical transmission that can be used as an efficient continuously variable transmission has a pair of speed sensors for detecting the rotational speeds at the transmission ends of two mechanical transfer lines formed in the transmission, a pair of pressure sensors for detecting the pressures at two positions, an actuator, and a computer. The computer controls the actuator and two clutches in such a way that the system is switched from a low-speed mode to a high-speed mode and vice versa without producing a shock.
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