Stabilization circuit of magnet switch for starter

• US 6,806,585 B2
• Filed: 12/04/2002
• Issued: 10/19/2004
• Est. Priority Date: 12/04/2002
• Status: Expired due to Fees

• Current Assignee: Valeo Mando Electrical System Korea Limited
• Original Assignee: Valeo Mando Electrical System Korea Limited
• Inventors: Park, Hyung-Bo
• Primary Examiner(s): Ponomarenko, Nicholas
• Application Number:
  US10/309,796
• Publication Number:
  US 20040108725A1
• Time in Patent Office: 685 Days
• Field of Search: 290/38.R, 290/38.A, 290/31, 123/179.3, 123/198.D
• US Class Current: 290/38.00R
• CPC Class Codes: F02N 11/087 Details of the switching means in starting circuits, e.g. relays or electronic switches
• CPC Class Codes: F02N 2011/0892 Two coils being used in the starting circuit, e.g. in two windings in the starting relay or two field windings in the starter

Abstract

The present invention relates to a stabilization circuit of a magnet switch for a starter in which an electronic switch of a starter which starts an engine installed in a vehicle is stable-operated. In the present invention, a current is prevented to flow to a pull-in coil and holding coil when disconnecting a key switch using a diode which is capable of flowing a current in a normal direction and preventing a flow of a current in a reverse direction, so that it is possible to accurately return a plunger to its original state. Therefore, the operation of a motor unit is stopped by opening two contact points. In the case that a key switch is turned on by connecting a diode between the contact points and the pull-in coil, the pull-in coil and holding coil are magnetized, and in the case that the key switch is turned off, the current is not flown to the pull-in coil and holding coil, so that the pull-in coil and holding coil are not magnetized.

Claims

1. A stabilization circuit of a magnet switch for a starter, comprising:

a motor unit 12 which starts an engine;

a pull-in coil(PL₁₁) and holding coil(HL₁₁) which are magnetized and generate a magnetic force line when a key switch(KSW₁₁) is turned on;

a plunger 11 which is absorbed by a magnetic force line generated by the pull-in coil(PL₁₁) and holding coil(HL₁₁) and supplies a driving power to the motor unit 12 by connecting contact points (B₁₁) and (C₁₁) for thereby supplying a driving force to the motor unit 12 and prevents the pull-in coil(PL₁₁) from being magnetized; and

a diode(D₁₁) which prevents a power flown through the contact points(B₁₁) and (C₁₁) and the plunger 11 from being flown to the pull-in coil(PL₁₁) and the holding coil(HL₁₁) when the key switch(KSW₁₁) is disconnected.