Denso Corporation

Nippondenso Co., Ltd.

Tris Inc.

Other

Nippondenso Corporation

Masami Niimi

Tsutomu Shiga

Mitsuhiro Murata

Masanori Ohmi

Nobuyuki Hayashi

Kiyokazu Haruno

Masahiro Katoh

Yasuyuki Wakahara

Akira Kato

Kazushige Okumoto

Shinji Usami

Takashi Senda

Youichi Murakami

Kyoji Inukai

Takayoshi Otani

Tadahiro Kurasawa

Takeshi Araki

Yoichi Sakaura

Mitsuo Ikeda

Yasuhiro Nagao

Akifumi Hosoya

Hideki Ichikawa

Yasuyuki Yoshida

Takahisa Inagaki

Naoki Morita

Takahiro Sakamoto

Sadayoshi Kajino

Mikio Saito

Hideya Notani

Keiichi Matsushima

Yoshinori Yamaguchi

Hiroaki Higuchi

Tarou Okada

Kazuhiro Yamaguchi

Osamu Takada

Takashi Hirabayashi

Nobuhiko Uryu

Yoshiaki Suzuki

Kenji Kawahara

Masahiro Takada

Osamu Ina

Hisashi Kobayashi

Yoshito Takagi

Jiro Ebihara

Masanori Oomi

Hiroyuki Dekita

Kenichi Shibayama

Ryoichi Honbo

Hiroshige Kako

Hirotada Kanagawa

Toshio Ishikawa

Kouji Katahira

Masahiro Kato

Masao Saito

Hiroaki Tamemoto

Yoshio Murakami

Masakiyo Shimada

Yukinobu Isoda

Sachiyo Tsuda

Teruo Kobayashi

Masaki Akiyama

Hiroaki Kawamura

Nobuyuki Yamashita

Ryochi Honbo

Mikio Saitoh

Shinichi Umemura

An electromagnetic switch is provided which includes: a coil generating magnetomotive force; a frame accommodating the coil and generating a flux path; a resin cover covering an opening of the frame; and a current-supply terminal member energizing the coil. The current-supply terminal member includes: a blade-shaped terminal whose end is connected to the coil and whose another end is drawn out of the resin cover in the axial direction of the electromagnetic switch; and a plate-shaped external connection terminal whose end is joined to an end of the blade-shaped terminal and whose another end is drawn out in the direction intersecting the axial direction. A portion between the ends of the external connection terminal is insert-molded in a terminal anchor block provided with the resin cover. A female terminal of a power supply connector provided at an electric supply line is fitted and electrically connected to the external connection terminal.

Electromagnetic switch

A starter includes a motor, a speed reducer, a pinion that transmits the drive torque of the motor to an engine ring gear, a partition wall that separates between the motor and the speed reducer, a pinion driving solenoid that pushes out the pinion to the ring gear side, and a motor energizing switch that opens and closes an electric point of contact. The starter is able to control independently operation of the pinion drive solenoid and operation of the motor energizing switch, the starter further includes a rotation detector disposed in a motor side inner space separated by the partition wall.

Starter for engine

The starter-use electromagnetic switch has an electrical contact interposed in a power supply line for supplying power from a battery to a starter motor, the main contact being turned on and off in interlock with energization of an electromagnet implemented by an excitation coil. The electromagnetic switch includes a connection fitting connected to the excitation coil at one end thereof and drawn outside through a resin cover of the electromagnetic switch at the other end thereof, and a terminal fitting electrically and mechanically connected to the other end of the connection fitting at one end thereof, the other end of the terminal fitting being branched into first and second terminal pieces. The first terminal piece serves as an excitation terminal supplied with power from the battery. The second terminal piece serves as a connection terminal connected to an excitation terminal of an external electromagnetic switch through a cable.

Starter-use electromagnetic switch

In a starter for starting an on-vehicle engine, a solenoid is provided to push a pinion gear. The solenoid has an electromagnetic coil composed of a single coil and electrically separated from a motor circuit, a fixed core, and a plunger. Supply of excitation current to the electromagnetic coil allows the fixed core to be magnetized to attract the plunger. Hence, a movement of the plunger results in a push of the movable member toward the ring gear. A switch is provided in the circuit and has a contact, a movable core, and a switch coil functioning as an electromagnet attracting the movable core in response to supply of current to the switch coil. A movement of the movable core results in on/off switching operations of the switch. The switch is allowed to operate independently of the solenoid when both the switch and solenoid are controlled.

Apparatus for starting engine mounted on-vehicle

A starter to start an engine mounted on a vehicle provides an electromagnetic solenoid to push a pinion gear towards a ring gear side, an electromagnetic switch to open and close a motor contact point. The electromagnetic solenoid and the electromagnetic switch are individually controlled by an Electronic Control Unit i.e., ECU. When an idle-stop is triggered, the ECU controls a starter relay to be closed during the ring gear is rotating whereby the pinion gear together with a clutch are pushed out to counter-motor direction by the electromagnetic solenoid. As a result, the pinion gear meshes with the ring gear that is rotating at lower rotational speed. Therefore, the inertial mass of the starter is added to the ring gear so that swinging of the engine can be suppressed.

Starter adapted to absorb engine-oscillation

An electromagnetic switch is disclosed as having an electromagnetic switch, operative to open or close a main contact of a motor circuit, and a solenoid having a function to push a pinion gear to a position away from a motor. The electromagnetic switch and the solenoid are placed in series in a unitary structure such that the electromagnetic switch and the solenoid have a switch case and a solenoid case both of which are integrally formed with each other to be contiguous in an axial direction. Further, a stationary core for the electromagnet and a stationary core for the solenoid are integrally formed and an operational direction of a plunger for the electromagnet and an operational direction of a plunger for the solenoid are set to be opposite in direction.

Starter with compact structure

An electromagnetic switch includes an excitation coil that forms an electromagnet by energizing, a movable core driven by a magnetism generated in the excitation coil, a cylindrical frame having a bottom that accommodates the excitation coil and constitutes a part of a magnetic circuit of the excitation coil, an end plate electrically connected with the frame, and diodes electrically connected with the excitation coil in parallel. In addition, at least one of terminals of the diodes is fixed to the end plate.

In an engine starting apparatus, together with a one-way clutch, a pinion is pushed toward a ring gear of an engine mounted in a vehicle. The one-way clutch has an idling torque smaller than a torque of the ring gear that tries to turn the pinion when the pinion is pushed to the ring gear. By a control device, a pinion pushing device is enabled to operate when i) the revolution speed of the ring gear is larger than a revolution speed of the pinion and ii) a relative revolution speed between the revolution speed of the ring gear and the revolution speed of the pinion is a desired value.

Engine starting apparatus

A starter includes an electromagnetic solenoid that generates force for pushing a pinion gearto a ring gear side, and an electromagnetic switch that opens and closes a motor contact point. When idle-stop is performed, an ECU energizes a solenoid coil of the electromagnetic solenoid during inertial rotation until the ring gear stops rotating. After rotation of an engine is stopped, the ECU stops energizing the solenoid coil. As a result, in the starter, the pinion gear can mesh with the ring gear that is rotating by inertia without use of the rotational force of a motor. The meshed state can be maintained even after energization of the solenoid coil is stopped.

Starter mounted on vehicle having idle-stop apparatus

An electromagnetic solenoid having an electromagnetic coil, a fixed iron core, a movable iron core, and a spring coil. The spring coil, arranged between the fixed and the movable iron core, supplies a spring force to the movable iron core toward an opposite direction of the fixed iron core along the axial direction. A magnetic attraction surface and a fitting part are formed in at least one of the fixed iron core and the movable iron core. The magnetic attraction surface is contacted with the fixed iron core when the movable iron core reaches the fixed iron core. An outer peripheral surface of the fitting part, apart from the magnetic attraction surface by a predetermined distance along the axial direction, is engaged with the spring coil. The most outer peripheral part of the magnetic attraction surface is positioned inside rather than the most outer peripheral part of the fitting part.

Electromagnetic solenoid

An electromagnetic switch operative to close and open an electrical contact arrangement to thereby turn on and off an electrical current flowing through an electrical circuit. A movable iron core includes a shaft insertion hole that extends in an axial direction of the movable iron core and has an opening in an end face of the movable iron core axially opposing a movable contact of the electrical contact arrangement. The hole includes a step disposed at a position along the depth, a shaft fixture section on a bottom side of the step, and a shaft guide section on an opening side of the step. An inside diameter of the shaft fixture section is smaller than an inside diameter of the shaft guide section. One axial end side portion of the shaft is press fit in the shaft fixture section.

A solenoid for pushing out a pinion pushes out a pinion gear to a ring gear side and a switch for motor energization that opens and closes a motor point of contact have a solenoid coil and a switch coil that form an electromagnet by energization, respectively. A fixed iron core used commonly by both coils is arranged between the solenoid coil and the switch coil. A solenoid yoke that covers a perimeter of the solenoid and a switch yoke that covers a perimeter of the switch are formed integrally as a whole yoke in an axial direction.

Starter for vehicles equipped with automatic engine stop/re-starting device

An electromagnetic switch unit comprises a solenoid device that pushes out a pinion gear to a ring gear side of an engine, and an electromagnetic switch that opens and closes a main point of contact of a motor circuit. The solenoid device and the electromagnetic switch are arranged in series in an axial direction, while a magnetic plate that forms a part of magnetic circuit between a first coil used for the solenoid device and a second coil used for the electromagnetic switch is shared by the solenoid device and the electromagnetic switch.

Starting device for engines

Growing community of inventors

Handa, Japan

Masami Niimi