Vehicular alternator failure determination apparatus using commutating device voltage
First Claim
1. A vehicular alternator failure determination apparatus comprising:
- a maximum voltage detection part for detecting a maximum voltage of an alternator commutating device which commutates an AC output of an alternator driven by an engine;
a minimum voltage detection part for detecting a minimum voltage of said alternator commutating device;
a voltage difference calculation part for calculating a difference voltage from outputs of said maximum and minimum voltage detection parts; and
a failure determination part which determines that said alternator is in a failure state, when an output of said voltage difference calculation part is equal to or greater than a prescribed voltage.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicular alternator failure determination apparatus is capable of making a failure determination accurately. The apparatus includes a maximum voltage detection part (1) for detecting a maximum voltage of an alternator commutating device which commutates an AC output of the alternator driven by an engine, a minimum voltage detection part (2) for detecting a minimum voltage of the alternator commutating device, a voltage difference calculation part (3) for detecting a difference voltage from outputs of the maximum and minimum voltage detection parts, and a failure determination part (4) which determines that the alternator is in a failure state, when an output of the voltage difference calculation part is equal to or greater than a prescribed voltage.
-
Citations
11 Claims
-
1. A vehicular alternator failure determination apparatus comprising:
-
a maximum voltage detection part for detecting a maximum voltage of an alternator commutating device which commutates an AC output of an alternator driven by an engine; a minimum voltage detection part for detecting a minimum voltage of said alternator commutating device; a voltage difference calculation part for calculating a difference voltage from outputs of said maximum and minimum voltage detection parts; and a failure determination part which determines that said alternator is in a failure state, when an output of said voltage difference calculation part is equal to or greater than a prescribed voltage. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A vehicular alternator failure determination apparatus comprising:
-
an average voltage calculation part for calculating an average voltage in a prescribed cycle of an output voltage of an alternator commutating device which commutates an AC output of an alternator driven by an engine; a ripple voltage detection part for detecting the generation of a ripple voltage when a voltage difference between an output voltage of said alternator commutating device and an average voltage thereof in the last cycle becomes equal to or greater than a prescribed ripple determination voltage difference; a ripple voltage counting part for counting the number of generations of failure ripple voltages within said prescribed cycle; and a failure location estimation part for estimating the location of failure from the number of generations of failure ripple voltages; wherein each of said parts operates in said prescribed cycle. - View Dependent Claims (8, 9, 10, 11)
-
Specification