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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsKenichi Ikejiri, Eiichiro Kawahara, Mitsumasa Furumoto
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A hydraulically operated continuously variable transmission includes a hydraulic pump coupled to an input shaft, a hydraulic motor coupled to an output shaft, a closed hydraulic circuit interconnecting the hydraulic pump and the hydraulic motor, a hydraulic actuator for actuating a controlled member in the closed hydraulic circuit, an auxiliary pump connectable to the closed hydraulic circuit and the hydraulic actuator, a supply oil passage for supplying oil discharged from the auxiliary pump to the hydraulic actuator, and a control valve coupled between the supply oil passage, the closed hydraulic circuit, and an oil tank. The control valve comprises a hydraulic chamber communicating with the supply oil passage, a spring, and a spool disposed between the hydraulic chamber and the spring. The spool is movable, until the pressure of oil in the hydraulic chamber and the force of the spring are balanced, successively from a first position in which the supply oil passage and the closed hydraulic circuit are disconnected and the supply oil passage and the oil tank are disconnected, to a second position in which the supply oil passage and the closed hydraulic circuit are connected, to a third position in which the supply oil passage and the oil tank are connected, in response to an increase in the pressure of oil in the hydraulic chamber.
A hydraulically operated continuously variable transmission comprising:
A hydraulically operated continuously variable transmission comprising:
An oil flow control apparatus in a hydraulically operated continuously variable transmission of the type having a hydraulic pump and a hydraulic motor interconnected through a closed hydraulic circuit and a supply oil passage connecting said closed circuit to an auxiliary pump, comprising:
An oil flow control apparatus in a hydraulically operated continuously variable transmission of the type having a hydraulic pump and a hydraulic motor interconnected through a closed hydraulic circuit and a supply oil passage connecting said closed circuit to an auxiliary pump, at least one of said hydraulic pump and said hydraulic motor having a chamber accommodating sliding surfaces therein, comprising:
Dependencies are inferred from the claim text.