Onboard electrical system for a vehicle with switch connections between electrical subsystems
AssigneeSiemens Aktiengesellschaft
InventorsThomas Goetze, Hans-Peter Johanning, Heinz Schaefer
Life of this patent
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Abstract
In order to reduce the battery load, a second elevated onboard electrical system voltage is provided at least for high-current consuming components. The voltage is derived from the battery voltage via a step-up switching regulator (SUSR) or is supplied by a starter-generator (SG) via a converter (CONV) in the generator mode of the starter-generator, which is coupled with an internal combustion engine (ICE) of the vehicle. The step-up switching regulator is used for battery supply of a start capacitor (CAP) and the converter is used for triggering of the starter-generator to start the internal combustion engine.
Claims24
An onboard electrical system for a vehicle, comprising:
- a starter-generator;
- a first onboard electrical subsystem supplying power to low-voltage components of the vehicle;
- a second onboard electrical subsystem supplying power to higher-voltage components of the vehicle;
- a third onboard electrical subsystem for a starter mode and a generator mode of the starter-generator;
- and
- an electrical connecting device, wherein the first onboard electrical subsystem is switchably brought into supply connection across a step-up switching regulator to the second onboard electrical subsystem or to the third onboard electrical subsystem for the starter mode of the starter-generator, and wherein the third onboard electrical subsystem is switchably brought into supply connection with the second onboard electrical subsystem during the generator mode of the starter-generator.
An onboard electrical system for a vehicle, comprising:
- a vehicle battery;
- a starter-generator electrically downstream of the battery;
- a step-up switching regulator electrically downstream of the battery;
- a first onboard electrical subsystem electrically downstream of the battery;
- a second onboard electrical subsystem electrically downstream of the battery;
- a third onboard electrical subsystem electrically between the battery and the starter-generator;
- a first connection electrically between the first subsystem and the third subsystem;
- a second connection electrically between the first subsystem and the second subsystem;
- and
- a third connection electrically between the third subsystem and the second subsystem.
Dependencies are inferred from the claim text.