Abstract: A rotation angle detection device for detecting a rotation angle of an object has a substantially cylinder-shaped yoke, a magnetism generation unit which is fixed to an inner surface of the yoke, a magnetism detection member which is arranged substantially in a center axis of the yoke, at least one bearing which rotatably supports the yoke, and a support member which holds the bearing. The yoke is made of a magnetic metal, and fixedly mounted at the object to be rotatable integrally with the object. The magnetism generation unit generates a magnetic field substantially perpendicular to the center axis of the yoke. The magnetism detection member generates an output corresponding to a variation of the magnetic field to detect the rotation angle of the object relative to the magnetism detection member.

Abstract: A rotation angle detection device for detecting a rotation angle of an object has a substantially cylinder-shaped yoke, a magnetism generation unit which is fixed to an inner surface of the yoke, a magnetism detection member which is arranged substantially in a center axis of the yoke, at least one bearing which rotatably supports the yoke, and a support member which holds the bearing. The yoke is made of a magnetic metal, and fixedly mounted at the object to be rotatable integrally with the object. The magnetism generation unit generates a magnetic field substantially perpendicular to the center axis of the yoke. The magnetism detection member generates an output corresponding to a variation of the magnetic field to detect the rotation angle of the object relative to the magnetism detection member.

Abstract: A pedal assembly is disclosed that includes a gear having a first tooth with a root and terminal ends. The gear rotates due to an input force. The assembly also includes a rack having a second tooth with root and terminal ends. The second tooth meshes with the first tooth at a contact point such that rotation of the gear causes linear movement of the rack. The assembly further includes a biasing member that biases the rack. The assembly additionally includes a slide member on which the rack slides. The slide member is provided on a side of the rack opposite to that of the gear such that the rack pushes on the slide member due to meshing of the first tooth and the second tooth.

Abstract: A reference electrode is used for detecting acidity or basicity of an oil with a sensitive electrode changed in response to the acidity or basicity of the oil. The reference electrode and the sensitive electrode are used as a pair of electrodes for detecting a difference between an electric potential of the sensitive electrode and an electric potential of the reference electrode. The reference electrode has a substantially constant output potential with respect to a pH which is changed according to the acidity or basicity of the oil. The reference electrode is constructed with an electrode substrate made of a metal, and a metal salt provided on the electrode substrate, such that the metal salt contains the metal and is hardly soluble in water.

Abstract: A device for detecting deterioration degree of oil is composed of an electrode unit in a cylindrical coil shape and a detector circuit connected to the electrode unit. The electrode unit is composed of a first electrode plate and a second electrode plate, both wound in a coil shape with an insulating layer disposed therebetween. The electrode unit is dipped in oil, and a potential difference between the electrode plates is measured by the detector circuit. The oil deterioration degree is detected based on the potential difference that varies according to a pH level of the oil. A distance between the first and the second electrode plates is kept small and precise to enhance accuracy in detecting oil deterioration without making the detector size large.

Abstract: A displacement sensor precisely detects displacement of a moving body in a rectilinear movement direction even if the moving body rotates. The sensor includes a detector and a magnet. The cross sectional area of the permanent magnet in a plane perpendicular to an axis, which extends in the rectilinear movement direction, varies in the direction of movement. The permanent magnet is magnetized in the rectilinear movement direction. The detector is located so that magnetic flux passes through a detection face of the detector substantially perpendicularly.

Abstract: In an idle speed control valve, an adjusting screw is inserted into a hole of a valve body and passes through a center of a coil provided in the valve body. The adjusting screw has a ring-shaped flexible projection on its outer periphery between a head portion and a threaded portion thereof to prevent a sealing material from entering. An outer diameter of the projection is equal to or slightly larger than an inner diameter of the hole. Therefore, when the adjusting screw is inserted into the hole, a peak of the projection contacts an inner wall of the hole. The projection may be integrally molded with the adjusting screw. A ring-shaped projection may be provided on a thin wall portion of the adjusting screw.

Abstract: A displacement sensor precisely detects displacement of a moving body in a rectilinear movement direction even if the moving body rotates. The sensor includes a detector and a magnet. The cross sectional area of the permanent magnet in a plane perpendicular to an axis, which extends in the rectilinear movement direction, varies in the direction of movement. The permanent magnet is magnetized in the rectilinear movement direction. The detector is located so that magnetic flux passes through a detection face of the detector substantially perpendicularly.

Abstract: In an idle speed control valve, an adjusting screw is inserted into a hole of a valve body and passes through a center of a coil provided in the valve body. The adjusting screw has a ring-shaped flexible projection on its outer periphery between a head portion and a threaded portion thereof to prevent a sealing material from entering. An outer diameter of the projection is equal to or slightly larger than an inner diameter of the hole. Therefore, when the adjusting screw is inserted into the hole, a peak of the projection contacts an inner wall of the hole. The projection may be integrally molded with the adjusting screw. A ring-shaped projection may be provided on a thin wall portion of the adjusting screw.