Current measurement module for an internal combustion engine starter device
First Claim
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1. A starter device for internal combustion engines, comprising a starter motor;
- a current measuring module which measures a starter current of said starter motor, said starter measuring module including a magnetic field sensor;
control electronics controlled by said magnetic shield sensor and generating a control signal for switching off said starter motor when a switch-off current of said starter motor is reached;
a conductor carrying said starter current, said current measuring module including a soft-iron core which at least partly surrounds said conductor, said soft-iron core having a through-opening which is greater than said conductor so that a coaxial ring gap remains between said soft-iron core and said conductor, said magnetic field sensor being arranged in said coaxial ring gap; and
a starter relay which has a contact bolt which forms said current-carrying conductor, said starter motor has an electrical connection contact; and
further comprising a fastener which locks said current measuring module and simultaneously clamps an electric connection between said contact bolt of said starter relay and said electrical connection contact of said starter motor.
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Abstract
A current measuring module for a starter device of an internal combustion engine has a measuring device which measures a starter current of a starter motor, a soft-iron core which at least partly surrounds a conductor carrying a starter current and carries a magnetic field sensor, and control electronics controlled by the magnetic field sensor and generating a control signal for switching off the starter motor when a switch-off current of the starter motor is reached.
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Citations
10 Claims
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1. A starter device for internal combustion engines, comprising a starter motor;
- a current measuring module which measures a starter current of said starter motor, said starter measuring module including a magnetic field sensor;
control electronics controlled by said magnetic shield sensor and generating a control signal for switching off said starter motor when a switch-off current of said starter motor is reached;
a conductor carrying said starter current, said current measuring module including a soft-iron core which at least partly surrounds said conductor, said soft-iron core having a through-opening which is greater than said conductor so that a coaxial ring gap remains between said soft-iron core and said conductor, said magnetic field sensor being arranged in said coaxial ring gap; and
a starter relay which has a contact bolt which forms said current-carrying conductor, said starter motor has an electrical connection contact; and
further comprising a fastener which locks said current measuring module and simultaneously clamps an electric connection between said contact bolt of said starter relay and said electrical connection contact of said starter motor. - View Dependent Claims (2, 3, 4)
- a current measuring module which measures a starter current of said starter motor, said starter measuring module including a magnetic field sensor;
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5. A starter device for internal combustion engines, comprising a starter motor;
- a current measuring module which measures a starter current of said starter motor, said starter measuring module including a magnetic field sensor;
control electronics controlled by said magnetic shield sensor and generating a control signal for switching off said starter motor when a switch-off current of said starter motor is reached;
a conductor carrying said starter current, said current measuring module including a soft-iron core which at least partly surrounds said conductor, said soft-iron core having a through-opening which is greater than said conductor so that a coaxial ring gap remains between said soft-iron core and said conductor, said magnetic field sensor being arranged in said coaxial ring gap, said starter motor having a connection contact which forms said current-carrying conductor, said starter motor having a commutation cover, said current measuring module being arranged at said commutation cover. - View Dependent Claims (6, 7, 8, 9, 10)
- a current measuring module which measures a starter current of said starter motor, said starter measuring module including a magnetic field sensor;
Specification