Provided is an electromagnetic switch device for starter in which an auxiliary relay is provided and which has a small size and can be easily manufactured. The electromagnetic switch device for starter includes: a main contact chamber forming a space in which a pair of main fixed contacts are located and a main movable contact can move; and a sub contact chamber forming a space in which a pair of sub fixed iron cores (A), (B) are located and a sub movable contact can move; and a cylindrical terminal block in which the main contact chamber and the sub coil are arranged so as to be adjacent to each other in the radial direction with a partition wall provided therebetween and separating the sub coil and the main contact chamber from each other.

A starter includes a coil spring disposed between a pinion gear and a motor and a buffer rubber disposed between the pinion gear and the coil spring. When the pinion gear is subjected to a reactive force from an engine, the buffer rubber absorbs the impact. Before the impact acts on the pinion gear, the coil spring is subjected to a given initial load. When the impact acts on the pinion gear, the coil spring absorbs it transmitted through the buffer rubber. The cover in which the coil spring is stored has a flange which is held from moving to the pinion gear in response to expansion of the coil spring, while it is permitted to move to the motor in response to contraction of the coil spring. This eliminates a risk that mechanical noise occurs when the pinion gear is advanced and then brought into mesh with the engine.

Embodiments of the invention provide a starter that includes a motor with an armature that is coupled to a pinion. In some embodiments, the starter can include a main field coil that can be configured and arranged to produce a main magnetic field flux. Some embodiments include at least one auxiliary flux assembly arranged in close proximity with the main field coil and electrically disconnected from it. In some embodiments, a control system can operatively power the main field coil to produce a magnetic field flux. In some embodiments, the at least one auxiliary flux assembly can provide a supplementary field flux adding to the main magnetic field flux that interacts with the armature.

An electromagnetic switch device for a starter includes: a terminal block in which a main contact chamber that is open at an attraction coil side in an axial direction and in which a pair of main fixed contacts and a main movable contact are located, and an auxiliary relay that is open at a side opposite to the attraction coil side in the axial direction, are located; a cover provided at an opening side of the terminal block at which the auxiliary relay is located, the cover having through holes through which main fixed contacts penetrate in a state where the auxiliary relay is sealed; and an elastic member which is located between the auxiliary relay and the cover and which fixes the auxiliary relay in the axial direction together with the terminal block and the cover.

A solenoid for a motor vehicle starter includes at least one coil wound on at least one spool, the at least one coil defines a toroidal space encircling the at least one coil. A stop member is positioned adjacent to the at least one spool. A diode holder is positioned in the toroidal space defined by the at least one coil, and a diode is positioned in the diode holder. The diode includes a cylindrical body, a first lead extending from a first end of the cylindrical body, and a second lead extending from a second end of the cylindrical body. The cylindrical body of the diode is retained by the diode holder within the toroidal space, and the first lead of the diode extends out of the toroidal space and is electrically connected to the stop member.

An engine start system which may be employed in automotive idle stop systems. To start an engine, the system brings a pinion gear into engagement with a ring gear coupled to the engine and turns on an electric motor to rotate the ring gear through the pinion gear to crank the engine. When it is requested to start the engine during deceleration of the engine before stop thereof, the system thrusts the pinion into engagement with the ring gear and then turns on the motor to rotate the pinion gear, in other words, delays the activation of the motor until after the pinion gear has engaged the ring gear. This minimizes mechanical impact or noise arising from the engagement of the pinion gear with the ring gear and improves the reliability in engagement with the ring gear during the deceleration of the engine and durability of the system.

A solenoid drive may include a ferromagnetic housing having a coil receiving chamber axially limited by opposing face side walls, a cylindrical coil arrangement having at least one electric coil, the coil arrangement being arranged in the chamber and coaxially surrounding a cylindrical coil interior space, a ferromagnetic plunger stop having a central region projecting axially in the interior space, a ferromagnetic plunger arranged at the housing opposing the plunger stop, and a ferromagnetic bypass device extending in a circumferential direction and arranged coaxially with respect to the coil arrangement and radially within the coil. The plunger may project axially into the coil interior space and may be adjustable axially bi-directionally relative to the housing between active and distal positions, which are proximal and distal, respectively, with respect to the central region. The bypass device may be spaced apart axially from the face side walls. In the passive position, the plunger may project axially into the bypass device such that an axial overlap between the plunger and the bypass device may be defined.

A starter battery voltage step-up device (LPF) intended to prevent a drop in the battery voltage (Vbat) produced by a current surge in a power circuit of the starter when the starter is powered on. The device comprises a casing of magnetic material (C, YO, CM, CM), a primary winding circuit (W1) intended to be inserted in series in the power circuit, and a short-circuited secondary winding circuit (W2), in which the primary winding circuit (W1) and/or the secondary winding circuit (W2) comprises a winding formed by at least one flat conductor (3) wound on edge. The invention also relates to the corresponding combination (1) of a starter and a voltage step-up device.

A starting method of a variable speed accelerator, which includes an electric device for generating rotational driving force and a transmission device for changing a speed of the rotational driving force generated by the electric device and transmits the changed rotational driving force to an object to be driven, the starting method includes: a constant speed electric motor starting step of starting a constant speed electric motor and gradually increasing a number of rotations in a first direction of a constant speed rotor and an internal gear; and a generator mode operating step of operating a variable speed electric motor in a generator mode and rotating a planetary gear carrier in the first direction, wherein the transmission device is a planetary gear transmission device, and wherein the electric device comprises: the constant speed electric motor.

A starter includes a coil spring disposed between a pinion gear and a motor and a buffer rubber disposed between the pinion gear and the coil spring. When the pinion gear is subjected to a reactive force from an engine, the buffer rubber absorbs the impact. Before the impact acts on the pinion gear, the coil spring is subjected to a given initial load. When the impact acts on the pinion gear, the coil spring absorbs it transmitted through the buffer rubber. The cover in which the coil spring is stored has a flange which is held from moving to the pinion gear in response to expansion of the coil spring, while it is permitted to move to the motor in response to contraction of the coil spring. This eliminates a risk that mechanical noise occurs when the pinion gear is advanced and then brought into mesh with the engine.