Method for managing the power supply of an electronic control unit during the starting phase of a motor vehicle
AssigneesContinental Automotive France, Continental Automotive GmbH
InventorsAmar Lounnas, Jean-Claude Prouvoyeur, Christophe Pradelles
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Abstract
A method for managing the power supply of an electronic control unit during the engine starting phase of a motor vehicle, the electronic control unit including a microcontroller, wherein a command to start the engine indicating the start of the starting phase is detected; the frequency of operation of the microcontroller is reduced; this reduced frequency of operation of the microcontroller is maintained for as long as effective starting of the engine has not been acknowledged; and the frequency of operation of the microcontroller is re-established once effective starting of the engine has been acknowledged.
Claims14
A method for managing a power supply of an electronic control unit during an engine starting phase of a motor vehicle combustion engine, said electronic control unit comprising a microcontroller, the method comprising:
- receiving a command to start the combustion engine;
- in response to receiving the command to start the combustion engine, reduing a frequency of operation of the microcontroller to a predetermined reduced clock frequency while the internal combustion engine starts a turning over process;
- maintaining this reduced clock frequency of the microcontroller for as long as the turning over process of the combustion engine is being performed and the effective starting of the combustion engine has not been acknowledged;
- and
- increasing the frequency of operation of the microcontroller to a predetermined clock frequency for controlling a plurality of functions of the motor vehicle once the turning over process of the combustion engine is complete and the effective starting of the combustion engine has been acknowledged.
Dependencies are inferred from the claim text.