Starting motor for an internal combustion engine, having a safety device
AssigneeRobert Bosch GmbH
InventorsKarl-Otto Schmidt, Thomas Karamudas, Marcus Rosenberger
Life of this patent
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Abstract
A starting motor for an internal combustion engine, where a control circuit monitors or controls the temperature of the starting motor or the carbon brushes, and if necessary, limits or switches off the primary current. The temperature is indirectly determined by means of a comparison, using the voltage ripple in the primary circuit between the battery and the starting motor. Occurring errors can be stored as status messages in an error storage device, and if desired, they can be interrogated and corrected at the next service interval.
Claims9
A starting motor for an internal combustion engine, having gearing to the engine, the gearing producing a closed linkage between the starting motor and the engine, during a starting operation of the engine, the starting motor having a battery, the starting motor comprising:
- a control circuit for measuring at least one of a starter voltage and a starter current that causes a crankshaft of the internal combustion engine to be driven, the control circuit determining at least one of the starter current, a temperature rise and a load at at least one point of the starting motor as a function of a voltage ripple in a primary circuit of the starting motor;
- a comparator for presetting a maximum load of the starting motor;
- a Schmitt trigger for emitting a signal from load values and a predefined limiting value, in response to the limiting value being one of exceeded and undershot;
- and
- a safety device for limiting an induction flux to the engine, in response to an appearance of the signal.
Dependencies are inferred from the claim text.