Aisan Kogyo Kabushiki Kaisha

Aisan Kogyo Kk

Aisan Kogyo Kabushiki

Kenji Eitoku

Kenji Hayashi

Mamoru Tateishi

Yasuhiko Hattori

An intake control device for an internal combustion engine having a body member 1 and a throttle valve 5 disposed within an air passage 4 . The external circular edge of the throttle valve 5 is divided, with a throttle shaft 6 into a first edge portion 5a which moves toward the upstream side of the air passage 4 and a second edge portion 5b which moves toward the downstream side of the air passage 4. On an inner wall 7 of the air passage 4 of the body member 1 are formed an upstream-side spherical wall surface 8 in a position facing the first edge portion 5a and a downstream-side spherical wall surface 9 in a position facing the second edge portion 5b. A first clearance 13 formed between the first edge portion 5a and the upstream-side spherical wall surface 8 is smaller than a second clearance 14 formed between the second edge portion 5b and the downstream-side spherical wall surface; the second edge portion 5b of the throttle valve 5 may not come into contact with the downstream-side spherical wall surface 9 even when a high intake manifold vacuum is built on the downstream side of the throttle valve 5 when the throttle valve 5 is in a position for closing the air passage 4.

Intake control device for internal combustion engine

A sliding contact includes a sliding contact piece having a contact segment and fixed to a snap member extending perpendicularly to the contact segment. The snap member has at least two snap portions formed in alignment perpendicular to the contact segments including one adjacent the contact segments which is adapted to be concentrically fitted onto a mounting projection of a slider and another apart from the contact segments which is adapted to keep the angle of the contact segments to the slider. Also, there is a connecting contact with at least two holding arms for nipping therebetween a substrate on both sides thereof, at least one of the holding arms having a projection to be inserted in a hole or recess preliminarily formed in the substrate. After the projection is received in the hole or recess, it is fixed by a conductive anchoring material such as solder, so that the connecting contact may be fixedly attached to the substrate.

Contact structure for slider position sensor

In a throttle valve opening sensor including a substrate provided with an opening detecting portion for detecting openings of a throttle valve and a specific opening detecting portion for detecting a specific opening of the throttle valve, the specific opening detecting portion consisting of a collector and a conductor, a rotor adapted to be rotated in association with rotation of the throttle valve, and first and second contacts mounted to the rotor and adapted to slide on the opening detecting portion and the specific opening detecting portion, thereby detecting the openings and the specific opening of the throttle valve; the improvement is characterized in that the collector and the conductor of the specific opening detecting portion comprises a metal conductor, and that a resin member is arranged on the substrate in connection with the collector and the conductor, the resin member being made substantially flush with the collector and the conductor, wherein the second contact is slid on the resin member.

Throttle valve opening sensor

In a throttle valve opening sensor including a substrate provided with a throttle valve opening detecting portion, a rotor adapted to be rotated in association with rotation of a throttle valve, a housing for rotatably supporting the rotor and incorporating the substrate, a packing mounted in the housing for sealing the substrate, and a contact mounted on the rotor and adapted to slide on the opening detecting portion; the improvement comprises a substrate pressing portion formed at the packing for inwardly pressing the substrate, an O-ring projecting portion formed at the packing on the outer peripheral side of the substrate pressing portion and tightly contacting with the housing, and a cover provided outside the packing for inwardly pressing the substrate pressing portion and the projecting portion of the packing.

A throttle valve opening sensor for detecting an opening and a specific opening of a throttle valve, comprising a substrate having a partially sectoral printed pattern formed by an opening detecting portion and a specific opening detecting portion for the throttle valve, a rotor adapted to be rotated in association with rotation of the throttle valve, a housing for rotatably supporting the rotor and having a substrate receiving hole for receiving the substrate, a packing installed in the housing for sealing the substrate, a cover mounted on the outside of the packing for fixing the substrate through the packing to the housing, first and second contacts mounted on the rotor and adapted to slide on the opening detecting portion and the specific opening detecting portion, a plurality of terminals installed in the housing and connected to lead wires for power supply and signal output, and a plurality of conductive elastic members for electrically connecting the terminals to the opening detecting portion and the specific opening detecting portion and biasing the substrate against an inner peripheral point of the substrate receiving hole on the opposite side of the terminals, wherein the center of the printed pattern is positioned on the basis of the inner peripheral point so as to coincide with the center of rotation of the rotor.

Growing community of inventors

Obu, Japan

Kenji Eitoku