Prime-mover dynamo plants – Electric control – Electric-starting motor
Patent
1997-10-08
2000-02-01
Ponomarenko, Nicholas
Prime-mover dynamo plants
Electric control
Electric-starting motor
290 38R, 74 7R, F02N 1100
Patent
active
060206500
ABSTRACT:
In an electromagnetic switch for a starter, a plunger is housed to face a grounding plate through an air gap in the inner circumference of an attraction coil. When the attraction coil is energized and magnetic flux flows in the magnetic circuit, the plunger is attracted toward the grounding plate by the magnetic force. The plunger has a hollow recess as a variable magnetic resistance member at its bottom end which is opposite to the air gap. The hollow recess extends inwardly from the bottom surface of the plunger by a predetermined length and is closed by a plug body fitted in the opening to have a closed hollow space. The variable magnetic resistance member may be provided by a reduced diameter part in place of or in combination with the hollow recess.
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Journal of Nippondenso Technical Disclosure, No. 55-102, published on Sep. 15, 1987.
Journal of Nippondenso Technical Disclosure, No. 55-103, published on Sep. 15, 1987.
Denso Corporation
Ponomarenko Nicholas
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