Abstract: A brake system includes four sensors and at least two electronic control units. The four sensors are a first sensor, a second sensor, a third sensor, and a fourth sensor. The first sensor transmits a sensor output signal generated therein to a predetermined electronic control unit among the at least two electronic control units. The second sensor transmits a sensor output signal generated therein to other electronic control unit that is different from the predetermined electronic control unit among the at least two electronic control units. The third sensor transmits a sensor output signal generated therein to at least one of the predetermined electronic control unit and the other electronic control unit. The fourth sensor transmits a sensor output signal generated in its own sensor to both of the predetermined electronic control unit and the other electronic control unit.

Abstract: A brake pedal device includes: a housing fixed to a vehicle; a brake pedal provided to be swingable about a predetermined axis with respect to the housing and to receive a depression operation of a driver; and at least three sensors that output signals according to an operation amount of the brake pedal. The at least three sensors include at least one magnetic sensor and at least two inductive sensors, for example. The at least two inductive sensors are spaced apart from each other such that a movement of a target metal of one inductive sensor is detected by a sensing coil of the one inductive sensor but a movement of a target metal of any other inductive sensors is not detected by the sensing coil of the one inductive sensor.

Abstract: A position detection device has at least four sensors outputting signals according to an operation amount of a brake pedal. Output signals from at least two sensors are input to a first ECU in a distinguishable manner. Output signals of at least two other sensors other than the sensor whose output signals are input to the first ECU are input to a second ECU in a distinguishable manner. A signal transmission unit transmits output signals of at least two sensors input to one of the first ECU and the second ECU to the other of the first ECU and the second ECU in a distinguishable manner. The first ECU and the second ECU identify an output signal indicating an abnormal value based on the output signals of at least four sensors, detect an operation amount of the brake pedal based on a plurality of output signals excluding an abnormal value.

Abstract: A position detection device includes a magnetic detection element that is positioned radially outside a first clutch component portion and a second clutch component portion of a dog clutch around an axis. The magnetic detection element is provided between a first magnetic flux path portion and a second magnetic flux path portion. The magnetic detection element outputs a sensor signal indicating the direction of a magnetic flux passing between the first magnetic flux path portion and the second magnetic flux path portion. The magnetic detection element outputs a sensor signal indicating a position relationship between the first clutch component portion concerning a first hole portion as well as a first tooth portion and the second clutch component portion concerning the second hole portion as well as the second tooth portion, based on changes in magnetic flux directions depending on the position relationship in a rotation direction around the axis.

Abstract: A position detection device includes a magnetic detection element that is positioned radially outside a first clutch component portion and a second clutch component portion of a dog clutch around an axis. The magnetic detection element is provided between a first magnetic flux path portion and a second magnetic flux path portion. The magnetic detection element outputs a sensor signal indicating the direction of a magnetic flux passing between the first magnetic flux path portion and the second magnetic flux path portion. The magnetic detection element outputs a sensor signal indicating a position relationship between the first clutch component portion concerning a first hole portion as well as a first tooth portion and the second clutch component portion concerning the second hole portion as well as the second tooth portion, based on changes in magnetic flux directions depending on the position relationship in a rotation direction around the axis.

Abstract: A detecting unit outputs a first output value varying with a rotation angle of a rotary body in a first cycle and outputs a second output value varying with the rotation angle in a second cycle. The variation in the second output value is different from the variation in the first output value in a positive/negative sign. A magnitude relationship between the first output value and the second output value changes with variation in the rotation angle at rotation angles during the first cycle. A selector unit selects, from the first output value and the second output value, a value of at least a minimum value and a maximum value of the first output values corresponding to the rotation angles. A computing unit computes, on the basis of the selected value, a value related to the rotation angle.

Abstract: A rotation angle detection device for detecting a rotation angle of a rotating body includes a magnet having poles arranged along a radial direction perpendicular to a rotation axis of the rotating body, the magnet being disposed to rotate together with the rotating body, a magnetic portion provided in a ring shape radially outward of the magnet, a plurality of gaps being formed in the magnetic portion at a plurality of locations along a circumferential direction, and a magnetic detection unit arranged in a particular gap of the plurality of gaps, the magnetic detection unit being configured to detect a tangential magnetic flux component in a tangential direction and a radial magnetic flux component in the radial direction of a magnetic field.

Abstract: A rotation angle detection device for detecting a rotation angle of a rotating body includes a magnet disposed to rotate together with the rotating body, a magnetic portion provided in a ring shape radially outward of the magnet, a plurality of gaps being formed in the magnetic portion at a plurality of locations along a circumferential direction, and a magnetic detection unit arranged in a particular gap of the plurality of gaps. The magnetic detection unit is located at a detection position, a width of the particular gap in the tangential direction at the detection position is defined as a detection position gap width, a width of the particular gap in the tangential direction at a position radially outward of the detection position is defined as a tangential width, and the tangential width is narrower than the detection position gap width.

Abstract: A rotation angle detection device for detecting a rotation angle of a rotating body includes a magnet disposed to rotate together with the rotating body, a magnetic portion provided in a ring shape radially outward of the magnet, a plurality of gaps being formed in the magnetic portion at a plurality of locations along a circumferential direction, and a magnetic detection unit arranged in a particular gap of the plurality of gaps. The magnetic detection unit is located at a detection position, a width of the particular gap in the tangential direction at the detection position is defined as a detection position gap width, a width of the particular gap in the tangential direction at a position radially outward of the detection position is defined as a tangential width, and the tangential width is narrower than the detection position gap width.

Abstract: A rotation angle detection device for detecting a rotation angle of a rotating body includes a magnet having poles arranged along a radial direction perpendicular to a rotation axis of the rotating body, the magnet being disposed to rotate together with the rotating body, a magnetic portion provided in a ring shape radially outward of the magnet, a plurality of gaps being formed in the magnetic portion at a plurality of locations along a circumferential direction, and a magnetic detection unit arranged in a particular gap of the plurality of gaps, the magnetic detection unit being configured to detect a tangential magnetic flux component in a tangential direction and a radial magnetic flux component in the radial direction of a magnetic field.

Abstract: An air cleaner has a first housing having an inlet and an upper opening, a second housing having an outlet and a lower opening, a filter element arranged between the upper opening of the first housing and the lower opening of the second housing. The first housing includes a looped wall, which protrudes from the inner surface thereof, and a sound absorbing member, which is made of an air permeable material and fixed to the upper end of the looped wall. The inner surface of the first housing, the inner peripheral surface of the looped wall, and the sound absorbing member define an air chamber.

Abstract: A spring damper disposed inside a coil spring includes: a main body having an outside diameter smaller than an inside diameter of a spring wire of the coil spring; and an outward convex part having a distal end located on an outer side of a cylindrical virtual plane in the radial direction, the cylindrical virtual plane passing through a center of the spring wire. When the coil spring is compressed by pressing an accelerator pedal by a driver, the outward convex part located between the adjacent spring wires prevents collision between the spring wires.

Abstract: An air cleaner includes a first housing, a second housing, and a filter element. The first housing has an opening. The second housing has an opening that is opposed to the opening of the first housing. The filter element is arranged between the opening of the first housing and the opening of the second housing. At least one of the first housing and the second housing includes a corner portion, a sound reducing member, and an air chamber. The corner portion is constituted by at least two mutually intersecting inner surfaces of the housing. The sound reducing member includes a sound absorbing portion made of an air permeable material. The sound reducing member bridges the at least two inner surfaces and covers the corner portion. The air chamber is defined between the sound reducing member and the corner portion.

Abstract: An air cleaner for an internal combustion engine includes a first housing having an inlet and an upper opening, a second housing having an outlet and a lower opening, a filter element arranged between the upper opening of the first housing and the lower opening of the second housing. The first housing includes a sound reducing wall portion. The sound reducing wall portion has a sound absorbing layer, which is made of nonwoven fabric, and an inner covering layer, which is fixed to the inner surface of the sound absorbing layer and made of a material having a lower air permeability than that of the sound absorbing layer.

Abstract: An intake system component of an internal combustion engine includes a porous material product and a resin molded portion. The porous material product is formed from a porous material and includes an outer edge and a general portion. The resin molded portion encompasses the outer edge and is formed integrally with the porous material product. The general portion is located outside the resin molded portion. The outer edge has a lower filling density than the general portion.

Abstract: A first housing of an air cleaner of an internal combustion engine includes a sound reducing wall portion, which includes an air-permeable sound absorbing layer made of nonwoven fabric and an air-impermeable foam layer, which is made of closed-cell plastic foam and is fixed to the outer surface of the sound absorbing layer.

Abstract: A method for manufacturing semiconductor devices is provided. The method includes bonding a semiconductor element to a first surface of a planar lead frame, clamping a partial area of the lead frame to hold the lead frame and the semiconductor element in molding dies, and covering at least a part of the lead frame and the semiconductor element with a resin member by resin molding which fills the molding dies with resin. A thin-walled portion having a relative small thickness is previously formed on a shortest virtual line connecting a clamp area of the lead frame to an area where the semiconductor element is bonded.

Abstract: A spring damper disposed inside a coil spring includes: a main body having an outside diameter smaller than an inside diameter of a spring wire of the coil spring; and an outward convex part having a distal end located on an outer side of a cylindrical virtual plane in the radial direction, the cylindrical virtual plane passing through a center of the spring wire. When the coil spring is compressed by pressing an accelerator pedal by a driver, the outward convex part located between the adjacent spring wires prevents collision between the spring wires.

Abstract: A magnetic sensor includes a semiconductor element, a lead frame, a bonding wire, and a package. The lead frame includes a die pad to which the semiconductor element is attached and an external connection lead. The bonding wire connects the external connection lead with the semiconductor element. The package seals the semiconductor element, the die pad, the external connection pad, and the bonding wire. The package is made of epoxy-based resin. The lead frame further includes a projecting portion extending from the die pad, the projecting portion is exposed from the package at a position different from a position of the external connection lead, and a partial surface of the projecting portion which contacts with the package is made of material having a higher ionization tendency than an ionization tendency of silver.

Abstract: An air cleaner includes a first housing, a second housing, and a filter element. The first housing has an opening. The second housing has an opening that is opposed to the opening of the first housing. The filter element is arranged between the opening of the first housing and the opening of the second housing. At least one of the first housing and the second housing includes a corner portion, a sound reducing member, and an air chamber. The corner portion is constituted by at least two mutually intersecting inner surfaces of the housing. The sound reducing member includes a sound absorbing portion made of an air permeable material. The sound reducing member bridges the at least two inner surfaces and covers the corner portion. The air chamber is defined between the sound reducing member and the corner portion.