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US 2016/0153554 A1Published application
Transmission hydraulics controller
AssigneeDenso Corporation
InventorFuminori SUZUKI
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AssigneeDenso Corporation
InventorFuminori SUZUKI
Estimating the term…
A normal oil passage that supplies hydraulic pressure to a friction engagement element through a hydraulic control valve, and a bypass oil passage that supplies hydraulic pressure to the friction engagement element while bypassing the hydraulic control valve, are provided. By switching an operative position of a manual valve, a hydraulic pressure supply route to the friction engagement element is switched between the normal oil passage and the bypass oil passage. By switching to the bypass oil passage, the hydraulic pressure supplied to the friction engagement element is not affected by operation of the hydraulic control valve, and a cleaning control may be performed to cause the hydraulic control valve to perform a cleaning operation. Accordingly, even if an operation amount of the cleaning control for the hydraulic control valve is increased, malfunctions by the friction engagement element will not occur.
A transmission hydraulics controller for a transmission including i) a manual valve that switches a hydraulic circuit for hydraulic oil of a friction engagement element of the transmission, ii) a hydraulic control valve that controls a hydraulic pressure applied to the friction engagement element, and iii) a range switch mechanism that is driven by an electric actuator and switches an operative position of the manual valve to switch a range of the transmission, the transmission hydraulics controller comprising:
Dependencies are inferred from the claim text.