| 摘要 |
<p>PURPOSE:To make it possible to detect a clutch pressure with a high degree of reliability at a low cost by incorporating a piston and a spring in a clutch hydraulic pressure control device so as to detect the motion of the piston in order to determine the presence of the clutch pressure. CONSTITUTION:A pressure detection switch 5 arranged in one end part of an oil passage 19 detects the clutch pressure, and is composed of a pressure detecting piston 30 and a spring 31 supporting the piston 30. When the clutch pressure exceeds a set value Th so that the clutch pressure pushes up the pressure detecting piston 30 overcoming the urging force of the spring 31, the upper surface of the piston 30 comes into contact with a cover 32. Accordingly, the presence of the hydraulic pressure in a clutch pack may be detected in the form of contacting and separating motion of the piston with respect to the cover 32. Accordingly, by detecting the presence of potential, it is possible to know the presence of the clutch hydraulic pressure as a reliable value at a low cost.</p> |
