Voltage regulating system for vehicle including alternator
AssigneeDenso Corporation
InventorsFuyuki Maehara, Hirohide Sato
Life of this patent
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Abstract
Battery voltage is compared by a comparator so that when the voltage of a normally-charged battery becomes higher than a normal reference voltage, it is regulated to be as high as a normal reference voltage. When an average value of the battery voltages in a period encompassing a typical operating speed of the engine becomes higher than an upper level, the reference voltage is lowered. On the other hand, when the average of the battery voltages in such period becomes lower than a lower level, the reference voltage is increased.
Claims22
A voltage regulating system for a vehicle including an alternator connected to a battery and having a field coil, the system comprising:
- a voltage regulator unit for controlling current supplied to said field coil according to a comparison between an output voltage of said alternator and a reference voltage;
- first means for continuously accumulating a plurality of values relative to terminal voltage of said battery sampled in a fixed detecting period which is longer than a period of typical speed changes of said engine due to vehicle operation;
- and
- second means for changing said reference voltage according to an accumulated amount of said plurality of values.
A voltage regulating system for a vehicle including an alternator connected to a battery and having a field coil, the system comprising:
- a voltage regulator unit for controlling current supplied to said field coil in one of a plurality of battery charging modes;
- first means for continuously accumulating a plurality of values relative to a charge-condition of said battery in a fixed detecting period;
- second means for comparing an accumulated amount of said plurality of values with a threshold value for each said fixed detecting period;
- and
- third means for setting one of said battery charging modes according to the comparison of said second means.
Dependencies are inferred from the claim text.