Abstract: In a system, a starter includes a motor for rotatably driving an output shaft with a pinion and an actuator that shifts the pinion toward a ring gear to be engaged with the ring gear. A monitor unit monitors a rotational speed of the internal combustion engine. The rotational speed of the internal combustion engine drops after an automatic control for stop of the engine. When an engine restart request occurs with the rotational speed being within a preset range during the rotational speed of the internal combustion engine dropping by the automatic control for stop of the engine, a drive unit drives the actuator to shift the pinion toward the ring gear to be engaged with the ring gear. The drive unit rotatably drives the motor with the pinion being engaged with the ring gear to thereby crank the crankshaft.

Abstract: 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.

Abstract: In a system, a starter includes a motor for rotatably driving an output shaft with a pinion and an actuator that shifts the pinion toward a ring gear to be engaged with the ring gear. A monitor unit monitors a rotational speed of the internal combustion engine. The rotational speed of the internal combustion engine drops after an automatic control for stop of the engine. When an engine restart request occurs with the rotational speed being within a preset range during the rotational speed of the internal combustion engine dropping by the automatic control for stop of the engine, a drive unit drives the actuator to shift the pinion toward the ring gear to be engaged with the ring gear. The drive unit rotatably drives the motor with the pinion being engaged with the ring gear to thereby crank the crankshaft.

Abstract: In an electromagnetic switch device, a direction where a first plunger moves at the time a solenoid for pinion extrusion operates and a direction where a second plunger moves at the time a solenoid for motor energization operates are constituted in the same direction. A concave portion having a predetermined depth D is formed in a first fixed iron core used for the solenoid for pinion extrusion and a stopper member that controls a returning position of the second plunger is arranged therein. A part of the second plunger overlaps to the first fixed iron core in the axial direction.

Abstract: A first coil constitutes a first coil unit by placing an iron core plate between the first coil and an auxiliary yokes and engaging stopping parts provided in two holding members to an end surface in an axial direction of the auxiliary yoke. A second coil constitutes a second coil unit by forming magnetic path members by insertion to a resin member provided in a second bobbin unitarily, and fixing two terminals to the resin member. The first and the second coil units are united by connecting one terminal lead line of the first coil taken out from holding members to the first terminal, and connecting another terminal lead line to a surface of the magnetic path member.

Abstract: In a system, a starter includes a motor for rotatably driving an output shaft with a pinion and an actuator that shifts the pinion toward a ring gear to be engaged with the ring gear. A monitor unit monitors a rotational speed of the internal combustion engine. The rotational speed of the internal combustion engine drops after an automatic control for stop of the engine. When an engine restart request occurs with the rotational speed being within a preset range during the rotational speed of the internal combustion engine dropping by the automatic control for stop of the engine, a drive unit drives the actuator to shift the pinion toward the ring gear to be engaged with the ring gear. The drive unit rotatably drives the motor with the pinion being engaged with the ring gear to thereby crank the crankshaft.

Abstract: 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.

Abstract: A starter for starting an engine in a vehicle is disclosed. The starter includes a motor and an output shaft that rotates by receiving torque from the motor. The starter also includes a pinion movable body that includes a pinion for transmitting the torque of the motor to a ring gear of the engine. The pinion movable body is provided on an outer circumference of the output shaft integrally with the pinion in a manner allowing movement along an axial direction thereof. The pinion is pushed towards the ring gear by a pinion-pushing means. A motor current-supply means turns ON and OFF energizing current flowing to the motor. A shock absorbing device is disposed on a torque transmitting path transmitting the torque of the motor to the pinion.

Abstract: 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.

Abstract: The present invention provides a starter, including a motor generating torque; a shaft rotating by the torque; a clutch fitting an outer periphery of the shaft; a pinion gear receiving the torque; a pinion control means configured to allow the pinion gear integrally with the clutch to be pushed out; a motor control means for controlling current supplied to the motor; and an inner tube that is arranged to be extended from the inner and in the direction opposite to the motor, supports the pinion gear so as to inhibit rotation thereof with respect to the periphery of the inner tube, and supports the pinion gear to be slidable; wherein a gear-side face and a tube-side face are formed in the pinion gear and the inner tube, respectively, in which the faces are facing each other, and a cushioning member is disposed between the gear-side face and the tube-side face.

Abstract: In a system for cranking a crankshaft of an internal combustion engine, a starter is provided with a motor working to, when energized, rotatably drive an output shaft with a pinion and an actuator working to, when energized, shift the pinion toward the ring gear to be engaged with the ring gear. A power supply is electrically connected to the motor and operative to output electrical power. A first mechanical relay is electrically connected between the power supply and the motor, and works to turn on and off a supply of a current based on the electrical power to the motor for rotating the pinion. A switching element is electrically connected across the first mechanical relay, and works to turn on and off the supply of the current to the motor for rotating the pinion.

Abstract: An engine start system which may be employed in automotive idle stop systems. The engine start system includes a pinion gear to be pushed to a ring gear coupled to an engine for achieving meshing engagement with the ring gear. After the pinion gear engages the ring gear, the engine start system starts to rotate the pinion gear using a starter motor to crank the engine. Specifically, when an engine restart request is made following an engine stop request, the engine start system waits until after the speed of the engine drops below a preselected gear engageble speed and then moves the pinion gear toward the ring gear without rotating the pinion gear. This minimizes the consumption of fuel in the vehicle in supplying electric power to the starter motor and a maximum level of mechanical noise arising from the engagement of the pinion gear with the ring gear.

Abstract: In a system, a starter includes a motor for rotatably driving an output shaft with a pinion and an actuator that shifts the pinion toward a ring gear to be engaged with the ring gear. A monitor unit monitors a rotational speed of the internal combustion engine. The rotational speed of the internal combustion engine drops after an automatic control for stop of the engine. When an engine restart request occurs with the rotational speed being within a preset range during the rotational speed of the internal combustion engine dropping by the automatic control for stop of the engine, a drive unit drives the actuator to shift the pinion toward the ring gear to be engaged with the ring gear. The drive unit rotatably drives the motor with the pinion being engaged with the ring gear to thereby crank the crankshaft.

Abstract: A starter for engines uses a leaf spring as a shaft lever for advancing a pinion gear for engagement with a ring gear. The shift lever may be constructed with a plurality of layered leaf springs having respective front ends spaced apart one another to contact a one-way clutch at different positions. The shift lever may include a lever holder which has a low heat conductive member to minimize fatigue of the leaf spring. The leaf spring is initially loaded with a spring force.

Abstract: In a starter, a front side bearing is provided between a one-way clutch and a pinion combined at a front end portion of a pinion tube. A housing supporting the pinion tube through the bearing has a housing small diameter portion where the inner diameter of the housing is set smaller than the outer diameter of the one-way clutch, between the bearing and a maximum advanced position of the one-way clutch. A housing front portion of the housing is formed into a cylindrical shape ahead of a attachment face which opposes to an engine side. The outer diameter of the front portion is gradually increased from the front end toward the attachment face. In this structure, the starter is installed from a transmission side without interfering the front portion of the housing with a transmission case.

Abstract: A shock absorber for a starter is presented. The shock absorber includes a rotary disk, a stationary disk and a disk spring. The rotary disk is pressed by the disk spring against a stationary disk to generate frictional force when the rotary disk is rotated by an excessive shock thereby absorbing the shock. The rotary disk has a plurality of press-formed rectangular dimples at a surface opposite the stationary disk, and each side of each the rectangular dimple inclines to a direction of rolling of the raw material of the rotary disk.

Abstract: A starter for engines uses a leaf spring as a shaft lever for advancing a pinion gear for engagement with a ring gear. The shift lever may be constructed with a plurality of layered leaf springs having respective front ends spaced apart one another to contact a one-way clutch at different positions. The shift lever may include a lever holder which has a low heat conductive member to minimize fatigue of the leaf spring. The leaf spring is initially loaded with a spring force.

Abstract: A starter for engines uses a leaf spring as a shift lever for advancing a pinion gear for engagement with a ring gear. The shift lever may be constructed with a plurality of layered leaf springs having respective front ends spaced apart one another to contact a one-way clutch at different positions. The shift lever may include a lever holder which has a low heat conductive member to minimize fatigue of the leaf spring. The leaf spring is initially loaded with a spring force.

Abstract: A shock absorber for a starter is presented. The shock absorber includes a rotary disk, a stationary disk and a disk spring. The rotary disk is pressed by the disk spring against a stationary disk to generate frictional force when the rotary disk is rotated by an excessive shock thereby absorbing the shock. The rotary disk has a plurality of press-formed rectangular dimples at a surface opposite the stationary disk, and each side of each the rectangular dimple inclines to a direction of rolling of the raw material of the rotary disk.

Abstract: In a starter, a front side bearing is provided between a one-way clutch and a pinion combined at a front end portion of a pinion tube. A housing supporting the pinion tube through the bearing has a housing small diameter portion where the inner diameter of the housing is set smaller than the outer diameter of the one-way clutch, between the bearing and a maximum advanced position of the one-way clutch. A housing front portion of the housing is formed into a cylindrical shape ahead of a attachment face which opposes to an engine side. The outer diameter of the front portion is gradually increased from the front end toward the attachment face. In this structure, the starter is installed from a transmission side without interfering the front portion of the housing with a transmission case.