| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a transmission oil pressure device of an automatic transmission capable of supplying the flow of oil supplied from an oil pump to a start clutch without response delay in the hydraulic control device of the automatic transmission. <P>SOLUTION: This transmission oil pressure device of the automatic transmission comprises the oil pump driven by an engine at all times, the automatic transmission formed of a belt type continuously variable transmission and a torque converter, a clamp pressure regulating means positioned in an upstream pressure circuit in which the oil pump is used as a hydraulic pressure source and regulating a clamp pressure pressing the belt of the belt type continuously variable transmission, and a tightening pressure regulating means positioned in a downstream pressure circuit in which drain pressure from the clamp pressure regulating means is used as a hydraulic pressure source and regulating a tightening pressure of the start clutch. The transmission oil pressure device also comprises a bypass circuit for communicating the upstream pressure circuit with the downstream pressure circuit, a selector valve capable of switching between a communicated state and a non-communicated state of the bypass circuit, and a selector valve control means controlling the communication state of the selector valve. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
