Patent ID: 8272485

Claim:
A hydraulic control unit having an oil pump, comprising: a plurality of oil discharging outlets, a high pressure route connected with a first oil discharging outlet of said plurality of oil discharging outlets: a medium pressure route, an oil pressure therein is lower than that in the high pressure route; a low pressure route, an oil pressure therein is lower than that in the medium pressure route; and a connection mode switching mechanism for selectively connecting a second oil discharging outlet of said plurality of oil discharging outlets with the high pressure route, the medium pressure route or the low pressure route, wherein: the connection mode switching mechanism comprises a changeover valve for selectively connecting the second oil discharging outlet with the medium pressure route or the low pressure route; and the hydraulic control unit comprises a changeover valve controlling device for switching a connection mode of the second oil discharging outlet by controlling the changeover valve on the basis of a required amount of operating oil to be fed to the medium pressure route, between: a first connection mode in which the second oil discharging outlet is connected with the medium pressure route and disconnected from the low pressure route; and a second connection mode in which the second oil discharging outlet is connected with the low pressure route and disconnected from the medium pressure route.