Patent EP0075931A2 successfully refreshed from Google Patents.
EP0075931A2
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EP
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Fail-safe system in a power regulation circuit for an automotive electronic circuit
Assignee: Nissan Motor Co Ltd
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Filing: 1982-09-28
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Granted: —
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Expires: 2002-09-28
Abstract
Abstract A fail-safe system in a power regulation circuit for an automotive electronic circuit such as electronic anti-skid brake control system, which fail-safe system can perform the fail-safe operation even when the power regulation circuit (10) is damaged and thereby the supply voltage from the power regulation circuit (10) varies significantly. The fail-safe system in a power regulation circuit includes a monitor power supply circuit (12) independently of the power regulation circuit. The monitor power supply circuit (12) is adapted to produce a reference signal (E,) to be compared with the output of the power regulation circuit in a fail-safe circuit. The fail-safe circuit (13) produces an error signal when the output signal value drops below a given threshold defined by the reference signal value to activate an alarm signal generator (20,Tr1,18) and disconnect an actuator controlled by the control system in order to prevent the actuator from malfunctioning due to errors in the control system.
Inventors
- 👤 Toshiro Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 10:33
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/88; B60T8/885; B60T2270/00; B60T2270/40; B60T2270/414
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
A fail-safe system in a power regulation circuit for an automotive electronic circuit, characterized by: a power source (VB); (10) the power regulation circuit connected to said power source and adapted to regulate the electrical voltage to be applied to said automotive electronic circuit, (12) a monitor power supply circuit connected to said power source independently of said power regulation circuit and adapted to-produce a reference voltage to be compared with output voltage of said power regulation circuit, which reference voltage is representative of an allowable range of variation of said output voltage of said power regulation circuit; and means for comparing said output voltage of said (13) power regulation circuit with said reference voltage and for disabling said automotive electric circuit when said output voltage is out of said allowable variation range.
Claim 2
Dependent Claim
133 words
A fail-safe system in a power regulation circuit for an automotive electronic circuit, characterized by: a power source (VB); (10) the power regulation circuit connected to said power source and adapted to regulate the electrical voltage to be applied to said automotive electronic circuit, (12) a monitor power supply circuit connected to said power source independently of said power regulation circuit and adapted to-produce a reference voltage to be compared with output voltage of said power regulation circuit, which reference voltage is representative of an allowable range of variation of said output voltage of said power regulation circuit; and means for comparing said output voltage of said (13) power regulation circuit with said reference voltage and for disabling said automotive electric circuit when said output voltage is out of said allowable variation range.
Claim 3
Dependent Claim
118 words
A fail-safe system in a power regulation circuit for an automotive electronic circuit,.characterized by: a power source (V B ) ; a power regulation circuit connected to said power source and adapted to regulate the voltage to be applied to said automotive electronic circuit; (12) a monitor power supply circuit connected to said power source independently of said power regulation circuit and adapted to produce a reference signal; and (236) means for modulating first and second reference voltage to define an allowable range of variation of the output voltage of said power regulation circuit, said means also detecting when said output voltage is out of said allowable variation range and disabling said automotive electronic circuit in response thereto.
Claim 4
Dependent Claim
118 words
A fail-safe system in a power regulation circuit for an automotive electronic circuit,.characterized by: a power source (V B ) ; a power regulation circuit connected to said power source and adapted to regulate the voltage to be applied to said automotive electronic circuit; (12) a monitor power supply circuit connected to said power source independently of said power regulation circuit and adapted to produce a reference signal; and (236) means for modulating first and second reference voltage to define an allowable range of variation of the output voltage of said power regulation circuit, said means also detecting when said output voltage is out of said allowable variation range and disabling said automotive electronic circuit in response thereto.
Claim 5
Dependent Claim
116 words
A fail-safe system in a power regulation circuit for an electronic anti-skid brake control system, characterized by: a power source; (10) a power regulation circuit connected to said power source for outputting a constant voltage of electrical power for said anti-skid brake control system; (12) a monitor power supply circuit connected to said power source independently of said power regulation circuit and adapted to produce a constant voltage reference signal; and means for modulating first and second reference voltage to define an allowable range of variation of said output voltage of said power regulation circuit, said means detecting when the output voltage is out of said allowable variation range to disable said anti-skid brake control system.
Claim 6
Dependent Claim
116 words
A fail-safe system in a power regulation circuit for an electronic anti-skid brake control system, characterized by: a power source; (10) a power regulation circuit connected to said power source for outputting a constant voltage of electrical power for said anti-skid brake control system; (12) a monitor power supply circuit connected to said power source independently of said power regulation circuit and adapted to produce a constant voltage reference signal; and means for modulating first and second reference voltage to define an allowable range of variation of said output voltage of said power regulation circuit, said means detecting when the output voltage is out of said allowable variation range to disable said anti-skid brake control system.
Claim 7
Dependent Claim
41 words
The system as set forth in claim 1, 2 or 3, which (18) further comprising an indicator lamp responsive to said means for indicating malfunction of said power regulation circuit when the output voltage is out of said allowable variation range.
Claim 8
Dependent Claim
34 words
The system as set forth in claim 4, wherein said means is adapted to check the voltage of said reference signal to perform said disabling function even when said monitor power supply circuit malfunctions.
References Cited (Backward Citations)
No citation records indexed.
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