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electromagnetic actuator

An electromagnetic actuator, electromagnetic force technology, applied in the direction of magnets, circuits, magnetic objects, etc.

Active Publication Date: 2021-08-10
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coil generates a magnetic field when energized

Method used

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Examples

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no. 1 example

[0021] refer to Figures 1 to 9 , the first embodiment will be described below. Such as figure 1 As shown, the fuel supply system 10 according to the first embodiment is a fuel supply system for a diesel engine. The fuel supply system 10 includes a fuel tank 100 , a fuel filter 200 , a charge pump 300 , an ECU 400 , a common rail 500 , and a fuel injection valve 600 .

[0022] The fuel tank 100 is a tank that stores fuel to be supplied to the internal combustion engine. The fuel tank 100 is connected to the supply pump 300 through a pipe 700 for fuel. Fuel stored in the fuel tank 100 is pumped by the supply pump 300 . The supply pump 300 pumps fuel from the fuel tank 100 and supplies the fuel into the common rail 500 . Fuel remaining in fuel injection valve 600 and common rail 500 (main return fuel) and fuel from supply pump 300 (pump return fuel) are returned from pipe 700 to fuel tank 100 as return fuel.

[0023] The pipe 700 includes a low pressure pipe 710 , a high p...

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Abstract

The invention proposes an electromagnetic actuator (30) which drives an armature (33) by means of electromagnetic force. The electromagnetic actuator includes a stator (82), a coil (81) and an insulator (84). The stator (82) is made of magnetic material and has a cylindrical portion. Coils (81) are provided outside the stator. The coil (81) generates a magnetic field when energized. The insulator (84) is provided in a specific area of ​​the stator (82) radially facing the coil (81). The insulator (84) extends circumferentially partially along the stator (82) and inhibits current from flowing circumferentially through the stator (82). The stator (82) is integrally formed continuously in the circumferential direction from magnetic material.

Description

technical field [0001] The present disclosure relates to an electromagnetic actuator that drives an armature by electromagnetic force. Background technique [0002] Typically, an electromagnetic actuator includes a coil that, when energized, generates a magnetic field. An inner stator is arranged inside the coil, and an eddy current is generated on the side of the inner stator close to the coil after electrification. The eddy currents create a magnetic field that cancels the magnetic field generated by the coil. As a result, the magnetic field generated by the eddy current may interfere with the action of the armature. [0003] For example, patent document (DE10235240A) discloses a method for suppressing the occurrence of eddy currents. More specifically, this patent document discloses a slit extending in the axial direction over the entire area composed of magnetic material. In this way, the magnetic material is entirely separated by the slit. Since the current is cut ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M51/06
CPCF02M51/0628H01F7/1638H01F2007/1676H02K1/34H02K3/28H02K3/30H02K33/02
Inventor 佐佐和也足立尚史木谷慎吾
Owner DENSO CORP
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