Apparatus for diagnosing vehicle-mounted battery
First Claim
1. An apparatus for diagnosing the residual charge of a battery for use with an engine, comprising:
- a comparison means for comparing the terminal voltage of a battery with a reference voltage;
a stoppage detection means for detecting that the operation of an engine has stopped;
a timer means for determining that a predetermined time has elapsed since said stoppage detection means detected that the operation of said engine stopped;
a determination means for determining said residual charge of said battery from the comparison result provided by said comparison means when said timer means determined that the predetermined time has elapsed;
a holding means for holding the determination result of said determination means;
restart detection means for detecting that said engine has restarted; and
determination result outputting means for outputting the determination result held in said holding means when said restart detection means detects that said engine has restarted.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus for diagnosing the residual charge of a battery mounted in a vehicle which utilizes an engine includes a comparator for comparing the terminal voltage of the battery with a reference voltage, a stoppage detecting circuit for detecting that the operation of the engine has stopped, a timer for determining that a predetermined time has elapsed since the stoppage detecting circuit detected that the operation of the engine stopped, and a determination circuit for determining the residual charge of the battery from the comparison result provided by the comparator when the timer determined that the predetermined time has elapsed.
-
Citations
8 Claims
-
1. An apparatus for diagnosing the residual charge of a battery for use with an engine, comprising:
-
a comparison means for comparing the terminal voltage of a battery with a reference voltage; a stoppage detection means for detecting that the operation of an engine has stopped; a timer means for determining that a predetermined time has elapsed since said stoppage detection means detected that the operation of said engine stopped; a determination means for determining said residual charge of said battery from the comparison result provided by said comparison means when said timer means determined that the predetermined time has elapsed; a holding means for holding the determination result of said determination means; restart detection means for detecting that said engine has restarted; and determination result outputting means for outputting the determination result held in said holding means when said restart detection means detects that said engine has restarted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification