Abstract: There is provided a temperature adjustment system which performs temperature adjustment of one or a plurality of instruments installed in a vehicle, the temperature adjustment system comprising: a heat medium temperature regulating device which is configured to regulate a temperature of a heat medium; a heat medium supplying device which is configured to supply, to the instrument, the heat medium subjected to temperature regulation in the heat medium temperature regulating device; a bypass flow rate regulating device which is configured to regulate a passage flow rate of the heat medium in a stepwise manner, which is provided to bypass the heat medium temperature regulating device; a temperature measuring device which is configured to measure a temperature of the instrument; and a controlling device which is configured to control the bypass flow rate regulating device based on the measured temperature.

Abstract: A fluid passage valve is equipped with a valve body which is disposed rotatably through first and second shafts, a movable seat having a communication hole therein, and an elastic member that urges the movable seat toward a side opposite from the valve body. The first and second shafts are assembled and installed on the valve body such that an axis thereof is disposed at a position offset from a center of curvature of a spherical surface portion of the valve body. The fluid passage valve is placed in a valve-closed condition by the spherical surface portion abutting against a seating surface and closing the communication hole, and is placed in an open condition by the valve body separating away from the movable seat and thereby opening the communication hole.

Abstract: A fluid passage valve is equipped with a valve body which is disposed rotatably through first and second shafts, a movable seat having a communication hole therein, and an elastic member that urges the movable seat toward a side opposite from the valve body. The first and second shafts are assembled and installed on the valve body such that an axis thereof is disposed at a position offset from a center of curvature of a spherical surface portion of the valve body. The fluid passage valve is placed in a valve-closed condition by the spherical surface portion abutting against a seating surface and closing the communication hole, and is placed in an open condition by the valve body separating away from the movable seat and thereby opening the communication hole.

Abstract: An EGR valve includes a valve housing, a ball valve, a shaft, a valve holder held against the ball valve, and a valve seat. The valve holder includes a smaller-diameter portion, a larger-diameter portion, and an annular groove defined between the smaller-diameter portion and the larger-diameter portion. The annular groove is smaller in diameter than both the smaller-diameter portion and the larger-diameter portion. A chamber is defined between the annular groove and the valve housing.