摘要:
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.
摘要:
A method and a device for detecting a deterioration of vehicle oil are disclosed in which the end point of the oil service life can be detected with higher accuracy, while at the same time detecting the progress of the oil condition in the vicinity of the end point of the oil service life. The acidity or basicity of the vehicle oil is measured using a pH sensor (11) generating an output in responding to the degree of the acidity or basicity. The deterioration of the vehicle oil can be detected based on the fact that with the increase in vehicle mileage, a line approximating the output of the pH sensor (11) with respect to the vehicle mileage has a tendency to change from a first inclination to a second inclination larger than the first inclination and then from the second inclination to a third inclination smaller than the second inclination.
摘要:
An oil condition sensor detects a condition of oil in response to the potential difference between electrodes. The electrodes include at least a first and second electrodes coaxially arranged. The electrodes have projections being arranged to face each other in an opposed manner. Therefore, the projections provide wide surface area that performs as electrodes. It is possible to provide compact oil condition sensor that is easy to install into an oil tank or oil pan.
摘要:
A spring damper for absorbing vibration of a double coil spring is made of elastic material and composed of a cylindrical body, outer-wall convex portions, and inner-wall convex portions. The spring damper is arranged in an annular space formed between an outer coil spring and an inner coil spring of the double coil spring, so that the outer-wall convex portions push the outer coil spring in a radial outward direction and the inner-wall convex portions push the inner coil spring in a radial inward direction. Longitudinal ends of the cylindrical body are prevented from being hooked by spring wires of the outer or inner coil spring, when the double coil spring is expanded and compressed.
摘要:
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.
摘要:
An intake control system includes an intake control valve disposed in a common intake pipe connected to engine cylinders or a plurality of intake control valves disposed in intake pipes connected respectively to the engine cylinders. The intake control valves are openable and closable under the control of an electronic control unit directly or through respective actuators, based on an electric signal indicative of an operating condition of intake valves on engine cylinders.
摘要:
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.
摘要:
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.
摘要:
In a pair of electrodes where a potential difference is changed in accordance with acidity or basicity of oil, a reference electrode is made of cobalt or a cobalt alloy, and a sensitive electrode is made of tungsten or a tungsten alloy. The sensitive electrode is used in combination with the reference electrode. Accordingly, it is possible to provide a pair of electrodes for detecting the acidity or the basicity of the oil which use a novel electrode material not hazardous to the environment and at the same time, suited for use in a semiconductor fabrication technique.
摘要:
An air cleaner for use in an intake air passage connected to an engine of a vehicle, including a housing separable into two housings, a filter element received in one of the two housings, a sealing member for sealing contact with a sealing surface of the other housing, and a hinge device for rotatably connecting the two housings to each other, the hinge device including a receiving member having a receiving opening, and an axis member for being received in the receiving member through the receiving opening, the axis and receiving members being displaceable relative to each other substantially along a plane in which the sealing member extends, the air cleaner further including a clamp device cooperating with the hinge device to secure the two housings to each other, and a protector including two abutting portions, the protector allowing the sealing surface and the sealing member to be brought into the sealing contact with each other when the axis member is positioned at a hinging position in the receiving member, and inhibiting the sealing surface and the sealing member from being brought into the sealing contact with each other, by abutment of the two abutting portions thereof, when the axis member is not positioned at the hinging position, the protector including, as the two abutting portions thereof, a portion of one of the two housings and a portion of the other housing, respectively.