Electrical power supply system for motor vehicle
AssigneeDenso Corporation
InventorsKeisuke Tani, Kazuyoshi Obayashi, Takashi Senda, Yukihiro Yamashita, Daisuke Kuroda
Life of this patent
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Abstract
A power supply control apparatus for controlling an electric generator of a vehicle limits the rate of change of a power supply voltage to a predetermined variation rate range, when the change is caused by operations to control the charge condition of the vehicle battery, and controls the generated power to match the drive torque applied by the engine to the generator. When the electrical load demand changes, the generated power is controlled to limit a resultant momentary change in the power supply voltage caused by an engine response delay, while minimizing a resultant momentary amount of engine speed variation.
Claims20
A vehicle-use power supply system comprising
- a battery for supplying electrical power to an electrical load via a power supply bus, an electric generator for supplying electrical power via said bus to said battery and said electrical load, and a power supply control apparatus for controlling a value of generated power of said electric generator;
- wherein said power supply control apparatus comprises circuitry adapted to set said generated electrical power at a value that is determined based upon a first range and a second range, where said first range is a range of values of charge/discharge power of said battery whereby a power supply voltage appearing on said bus is held within a predetermined permissible range of voltages, and where said second range is a range of values of rate of change of said charge/discharge power whereby a rate of variation of said power supply voltage is held within a predetermined permissible range of variation rates.
A vehicle-use power supply system comprising
- a battery for supplying electrical power to a load via a power supply bus, an electric generator for supplying electrical power via said bus to said battery and said load, and an electrical power control apparatus for controlling a value of electrical power generated by said electric generator;
- wherein said electrical power control apparatus comprises circuitry adapted to set at least one of said value of generated electrical power and a level of load power that is consumed by said electrical load based upon a first range of values and a second range of values,
- said first range being a range of values of charge/discharge power of said battery whereby a power supply voltage appearing on said bus is held within a predetermined permissible range of voltages, and
- said second range being a range of variation of said charge/discharge power whereby an amount of momentary variation of said power supply voltage is held within a predetermined permissible range of voltages, when said momentary variation occurs due to a delay in adjusting said electrical power value.
Dependencies are inferred from the claim text.