Method for gradually driving a motor vehicle starter switch
First Claim
1. Apparatus for control of the power supply to a coil (B) for driving a moving contact (2b) of a motor vehicle starter, arranged to vary the effective current in the coil (B) during displacement of the core (2b) towards its contact position, whereby to close a moving contact (3) of the contactor and to energise the electric motor, wherein it is arranged to perform, in the course of this displacement:
- a first driving phase (t0, t1) at an effective current sufficient to set the core in motion, then;
a second driving phase (t1, t2, t3) at a lower effective current, characterised in that a continuous increase in the effective current is initiated during the said second phase after a predetermined or determined time.
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Accused Products
Abstract
The invention relates to a method for energising a coil for driving a moving contactor core of an electric starter for a motor vehicle, in which the effective current is varied in the coil during displacement of the core to its contact position, and in which, in the course of this displacement, there take place:
a first driving phase with an effective current which is high enough to set the core in motion, and then
a second driving phase with a smaller effective current, in which, after a determined or predetermined time, the effective current is continuously increased.
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Citations
10 Claims
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1. Apparatus for control of the power supply to a coil (B) for driving a moving contact (2b) of a motor vehicle starter, arranged to vary the effective current in the coil (B) during displacement of the core (2b) towards its contact position, whereby to close a moving contact (3) of the contactor and to energise the electric motor, wherein it is arranged to perform, in the course of this displacement:
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a first driving phase (t0, t1) at an effective current sufficient to set the core in motion, then;
a second driving phase (t1, t2, t3) at a lower effective current, characterised in that a continuous increase in the effective current is initiated during the said second phase after a predetermined or determined time. - View Dependent Claims (2, 3)
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7. A method of supplying power to a coil (B) for actuating a moving core (2b) of a contactor (2) for an electric starter for a motor vehicle, having an electric motor (M), wherein the effective current is varied in the coil (B) during displacement of the core (2b) towards its contact position, whereby to close a moving contact (3) and energise the electric motor (M), and wherein, during this displacement, there take place:
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a first driving phase (t0, t1) at a high enough effective current to set the core (2b) in motion, and then, a second driving phase (t1, t2, t3) with a weaker effective current, characterised in that, during the second phase (t1, t2, t3), after a predetermined or determined time, a continuous increase in the effective current is initiated. - View Dependent Claims (4, 5, 6, 8, 9, 10)
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Specification