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US 2002/0177931 A1Published application
On-board control system and method for vehicles
AssigneeDenso Corporation
InventorsTatsuya Iwasaki, Nobutomo Takagi, Hiroshi Kikukawa
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AssigneeDenso Corporation
InventorsTatsuya Iwasaki, Nobutomo Takagi, Hiroshi Kikukawa
Estimating the term…
In an on-board control system, a body ECU executes various control operations in response to the supply of power voltage from a battery. There is connected on the power line of the battery a voltage holding circuit which is formed of a capacitor so that the variation of battery voltage slows. A switch input circuit samples the on/off states of external switches periodically under control of a microcomputer. The microcomputer determines a fall of battery voltage, causing the switch input circuit to stop sampling of switch states. Stopping the circuit operation and thus reducing the battery load current slows the voltage fall at the occurrence of collision of vehicle, allowing adequate time to store collision data in a collision memory circuit.
An on-board control system which performs a plurality of control operations in response to supply of a power voltage from an on-board power source, with a voltage holding capacitor for slowing variation of the power voltage, the control system comprising:
An on-board control method for a vehicle having a battery, a power holding circuit for holding a battery voltage, a collision sensor and a collision memory, the control method comprising steps of:
Dependencies are inferred from the claim text.