Hydraulic control device of continuously variable transmission for vehicle

Hydraulic control device of continuously variable transmission for vehicle

A hydraulic control device has: a modulator valve using oil pressure from a hydraulic source for adjusting a modulator pressure; driving and driven-side hydraulic actuator control valves controlling hydraulic oil from the source to driving and driven-side hydraulic actuators; a driving-side control...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Hayashi Toshiaki, Inagaki Takafumi, Tsuchida Kenichi, Seriguchi Yuta, Nitani Hiromitsu, Takizawa Masashi, Kimura Yoichiro, Moriyama Shuji, Takasu Masafumi, Soga Yoshinobu, Mizuno Yoshihiro
Format: Patent
Sprache:eng
Schlagworte:
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
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Beschreibung
Zusammenfassung:A hydraulic control device has: a modulator valve using oil pressure from a hydraulic source for adjusting a modulator pressure; driving and driven-side hydraulic actuator control valves controlling hydraulic oil from the source to driving and driven-side hydraulic actuators; a driving-side control oil pressure adjusting electromagnetic valve using the modulator pressure for outputting a control oil pressure controlling the driving-side control valve; and a driven-side control oil pressure adjusting electromagnetic valve for outputting a control oil pressure controlling the driven-side control valve, the hydraulic control device including a failsafe valve switched from a normal to a failure position based on a failure disabling electric control for the driving-side and driven-side electromagnetic valves, the modulator valve making the modulator pressure lower than a value at the normal position based on an output switching pressure generated due to switching the failsafe valve from the normal to the failure position.