Patent ID: 11904826
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F  G | IPC B  F

Claim 6:
7. The degradation detection system according to claim 2, wherein
the pressure regulating valve comprises:
a housing;
a piston to reciprocate inside the housing in accordance with the command pressure; and
a valve body to change a shape thereof in accordance with a movement of the piston,

by changing the shape of the valve body in accordance with the movement of the piston, a piston-side surface of the valve body reciprocates between a position at which the piston-side surface comes into contact with the housing and a position away from the housing, and
the physical model expresses, by a mathematical equation, a position of the piston and a pressure of fluid inside the housing.