SYSTEM AND METHOD FOR VEHICLE START-STOP

摘要

A start-stop module for a vehicle can include a capacitor, one or more switches and a controller. The switches can be configured to connect the capacitor in parallel or in series with a battery of the vehicle. The controller can receive an input voltage having a magnitude based on a connection between the capacitor and the battery, and output a desired voltage that is appropriate for operating accessory loads of the vehicle. The controller can control the switches to switch between a standby mode and a cranking mode. The capacitor is in parallel with the battery in standby mode and in series with the battery in cranking mode. The controller can switch to the cranking mode when the engine is about to be restarted and return to standby mode after the engine has been restarted and when the battery voltage reaches the desired voltage for the accessory loads.

主权项

1. A start-stop module for a vehicle, comprising:
a first voltage source; one or more switches configured to connect the first voltage source (i) in parallel with a second voltage source of the vehicle, or (ii) in series with the second voltage source; and a controller configured to (i) receive an input voltage having a magnitude based on a connection between the first voltage source and the second voltage source, (ii) output a desired voltage that is appropriate for operating one or more accessory loads of the vehicle, and (iii) control the one or more switches to switch between a standby mode and a cranking mode, wherein:
(i) the controller controls the one or more switches to connect the first voltage source in parallel with the second voltage source during standby mode,(ii) the controller controls the one or more switches to connect the first voltage source in series with the second voltage source during cranking mode,(iii) the controller switches to the cranking mode when the engine is not running and is about to be restarted during start-stop operation, and(iv) the controller switches to the standby mode from the cranking mode after the engine has been restarted and when the second voltage source has a voltage that exceeds the desired voltage for the one or more accessory loads.