The invention discloses a limp home control circuit. The limp home control circuit is characterized in that one input end of a logic gate circuit A of the control circuit is connected with VCC, and the other input end of the logic gate circuit A is connected with an MCU (Microprogrammed Control Unit); the output end of the logic gate circuit A is connected to one input end of a logic gate circuit B; the other input end of the logic gate circuit B is connected to the VCC; the output end of the logic gate circuit B is connected to one input end of a logic gate circuit C; the other input end of the logic gate circuit C is connected to the input detection end of an ignition signal; the output end of the logic gate circuit C is connected to a base of a triode Q1; an emitter of the triode Q1 is connected to the VCC; a collector is connected to the control output end of a small lamp and a daytime running lamp. Through the adoption of the limp home control circuit, the problem that the whole vehicle has no any light indication output when the controller cannot work normally is solved; the reliability of a vehicle electronic system is improved; the running safety is improved.
Limp home control circuit
2015-04-29
Patent
Elektronische Ressource
Englisch
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
Limp control circuit, limp control system and automobile
Europäisches Patentamt | 2022
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