Apparatus for diagnosing electric power source while power is supplied to load device from the power source
First Claim
1. A power source monitoring apparatus for monitoring a state of each of at least one subject power source which consists of at least one of a plurality of electric power sources in an electric system wherein a load device having at least one electrically operated load is electrically connected to said plurality of electric power sources, said power source monitoring apparatus comprising:
- a detecting portion which detects at least one of a voltage and a current of at least one of said load device, said at least one subject power source, and at least one non-subject power source which consists of said plurality of electric power sources except said at least one subject power source; and
a first diagnosing device which diagnoses said each subject power source for an abnormality on the basis of an output of said detecting portion, while said electric system is placed in a power supply state wherein an electric power is permitted to be supplied from only said subject power source to said load device.
1 Assignment
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Accused Products
Abstract
A power source monitoring apparatus for monitoring a state of a subject power source which consists of at least one of a plurality of electric power sources in an electric system wherein a load device having at least one electrically operated load is electrically connected to the power sources, the monitoring device apparatus a detecting portion which detects a voltage and/or a current of at least one of the load device and the plurality of electric power sources, and a diagnosing device which diagnoses the subject power source for an abnormality on the basis of an output of the detecting portion, while the electric system is placed in a power supply state wherein an electric power is permitted to be supplied from only the subject power source to the load device.
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Citations
59 Claims
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1. A power source monitoring apparatus for monitoring a state of each of at least one subject power source which consists of at least one of a plurality of electric power sources in an electric system wherein a load device having at least one electrically operated load is electrically connected to said plurality of electric power sources, said power source monitoring apparatus comprising:
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a detecting portion which detects at least one of a voltage and a current of at least one of said load device, said at least one subject power source, and at least one non-subject power source which consists of said plurality of electric power sources except said at least one subject power source; and
a first diagnosing device which diagnoses said each subject power source for an abnormality on the basis of an output of said detecting portion, while said electric system is placed in a power supply state wherein an electric power is permitted to be supplied from only said subject power source to said load device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
and wherein said detecting portion includes a duty ratio detecting portion which detects said duty ratio of said switching elements. -
42. A power source monitoring apparatus according to claim 1, wherein said at least one non-subject power source consists of an electric generator which is operated to generate an electric power, by a drive power source provided to drive an automotive vehicle on which the power source monitoring apparatus is provided, and wherein said first diagnosing device diagnoses said each subject power source when said drive power source is turned on, and/or when said drive power source is turned off.
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43. A power source monitoring apparatus according to claim 1, wherein said first diagnosing device includes a composite diagnosing portion on the basis of an output of said detecting portion immediately after an automotive vehicle on which the power source monitoring apparatus is provided has been enabled to perform an assigned function thereof while the automotive vehicle is disabled to perform said assigned function, and an output of said detecting portion immediately after the automotive vehicle has been disabled to perform said assigned function while the automotive vehicle is enabled to perform the assigned function.
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44. A power source monitoring apparatus according to claim 1, wherein said at least one electrically operated load of said load device includes (a) a drive power source of an electrically operated hydraulic pressure source capable of pressurizing a working fluid, (b) a solenoid coil of a solenoid-operated control valve capable of controlling a pressure of the working fluid to be applied to a hydraulically operated brake in a braking system, and (c) a computer which constitutes a major portion of a hydraulic pressure control device which controls the pressure of said hydraulically operated brake, by controlling at least one of an electric energy to be supplied to said drive power source and an electric energy to be supplied to said solenoid coil,
and wherein said drive power source, said solenoid coil and said computer are operable with an electric power supplied from an electric power source device which includes said plurality of power sources. -
45. A power source monitoring apparatus according to claim 44, wherein said electric power source device consists of a first power source unit including at least one of said plurality of power sources, and a second power source unit including at least one of said plurality of power source which is other than said at least one power source of said first power source unit, and said solenoid coil and said computer are connected to both of said first and second power source units, while said drive power source of said hydraulic pressure source is connected to said electric power source device such that the drive power source is operated with the electric energy supplied from only said second power source unit,
and wherein at least one of said first and second power source units includes at least one of said at least one subject power source. -
46. A power source monitoring apparatus according to claim 44, wherein said electrically operated hydraulic pressure source includes a low-pressure pump, and a high-pressure pump whose delivery pressure is higher than that of said low-pressure pump and whose delivery rate is lower than that of said low-pressure pump, and said drive power source includes a low-pressure pump motor and a high-pressure pump motor for operating said low-pressure and high-pressure pumps, respectively,
and wherein said solenoid coil, said computer and said high-pressure pump motor are connected to said at least one subject power source and said at least one non-subject power source whose voltage is higher than the voltage of said at least one subject power source, and said low-pressure pump motor is connected to said electric power source device such that the low-pressure pump motor is operated with the electric energy supplied from only said at least one non-subject power source. -
47. A power source monitoring apparatus according to claim 1, which is provided on an automotive vehicle including (a) a drive power source, (b) said electric system including said load device connected to said plurality of power sources, and (c) a disconnecting circuit for temporarily disconnecting at least one of said plurality of power sources from said load device when said drive power source is started, and said at least one subject power source includes at least one of said plurality of power sources which is not temporarily disconnected by said disconnecting circuit from said load device,
and wherein said detecting portion detects at least one of a voltage and an electric current of at least one of said load device and said at least one non-subject power source which consists of said plurality of power sources except said at least one of said plurality of power sources which is not temporarily disconnected by said disconnecting circuit from said load device, and said first diagnoses device diagnosing each of said at least one subject power source on the basis of at least one of said output of said detecting portion and a rate of change of said output, when said drive power source of the automotive vehicle is started.
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48. A power source control apparatus provided in an electric system including (a) at least one subject power source, (b) at least one non-subject power source, (c) a load device connected to said at least one subject power source and said at least one non-subject power source and having at least one electrically operated load, and (d) a voltage regulating portion which is provided between said load device and at least one of said at least one non-subject power source and which regulates a voltage of said at least one of said at least one non-subject power source so that the regulated voltage is applied to said load device, said power source control apparatus comprising:
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a power source monitoring device which diagnoses each of said at least one subject power source; and
a supply voltage reducing device for controlling said voltage regulating portion such that a voltage to be applied to said load device is lower when said power source monitoring device has determined that any one of said at least one subject power source is abnormal, than when said power source monitoring device has determined that said at least one subject power source is normal. - View Dependent Claims (49)
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50. A power source monitoring apparatus for monitoring a state of a low-voltage power source in an electric system wherein a load device having at least one electrically operated load is connected to said low-voltage power source and a high-voltage power source, said power source monitoring apparatus comprising:
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a detecting portion which detects at least one of a voltage and an electric current of at least one of said load device, said high-voltage power source and said low-voltage power source; and
a diagnosing device which diagnoses said low-voltage power source for an abnormality on the basis of at least one of an output of said detecting portion and a rate of change of said output, while an electric power is supplied to said load device from both of said high-voltage power source and said low-voltage power source, without temporary disconnection of said high-voltage power source from said load device or temporary limitation of the electric power supplied from said high-voltage power source to said load device. - View Dependent Claims (51)
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52. A braking system comprising:
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a hydraulically operated brake;
an electrically operated hydraulic pressure source including a drive power source and pressurizing a working fluid;
a solenoid-operated control valve including a solenoid coil and capable of controlling a pressure of the working fluid to be applied to said hydraulically operated brake; and
a hydraulic pressure control device which controls the pressure of said hydraulically operated brake, by controlling at least one of an electric energy to be supplied to said drive power source of said electrically operated hydraulic pressure source and an electric energy to be supplied to said solenoid coil, and wherein at least one of said drive power source and said solenoid coil is connected to a plurality of electric power sources which include at least one subject power source, and said hydraulic pressure control device includes an abnormality-handling pressure control portion which is operated when any one of said at least one subject power source is abnormal, to control at least one of the electric energy to be supplied to said drive power source and the electric energy to be supplied to said solenoid coil, in an abnormality-handling manner which is different from a normal manner in which said at least one of said electric energies is controlled when none of said at least one subject power source is abnormal.
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53. A method of monitoring a state of each of at least one subject power source which consists of at least one of a plurality of electric power sources in an electric system wherein a load device is electrically connected to the plurality of electric power sources, the method comprising the steps of:
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detecting at least one of a voltage and a current of at least one of said load device, said at least one subject power source and at least one non-subject power source which consists of said plurality of electric power sources except said at least one subject power source; and
diagnosing said each subject power source for an abnormality on the basis of at least one of said at least one of said voltage and said current and a rate of change of said at least one of said at least one of said voltage and said current, while said electric system is placed in a power supply state wherein an electric power is permitted to be supplied from only said subject power source to said load device. - View Dependent Claims (54, 58)
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55. A method of monitoring a state of a low-voltage power source in an electric system wherein a load device having at least one electrically operated load is electrically connected to said low-voltage power source and a high-voltage power source, said method comprising the steps of:
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detecting at least one of a voltage and a current of at least one of said high-voltage and low-voltage power sources; and
diagnosing said low-voltage power source for an abnormality on the basis of at least one of said at least one of said voltage and said current and a rate of change of said at least one of said at least one of said voltage and said current, while said electric system is placed in a power supply state wherein an electric power is permitted to be supplied from at least said low-voltage power source. - View Dependent Claims (56, 57, 59)
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Specification