Method and circuit for self-checking troubles of a heating syste

Details Method and circuit for self-checking troubles of a heating syste Method and circuit for self-checking troubles of a heating syste

1990-01-08

1991-10-08

Crosland, Donnie L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

3404574, 340525, 431 13, 431 18, 431 24, 169 60, 165 111, 36442403, 36443101, 364550, 371 151, B60Q 100

Patent

active

050558250

ABSTRACT:
A method and circuit for self-checking problems in a heating system for an automobile are disclosed. A self-checking and indicating process are disclosed which include a first preheating step; an ignition period; a second preheating step; a combustion period module; and an extinguishment step according to a program interrupt. Various checking steps are included, along with various subroutines for indicating errors. Errors are displayed and a stopping step is performed if the temperature checked and the various proceding checking steps indicate that error conditions exist. The present invention includes an indicating apparatus which includes an output part of a microprocessor which provides a fundamental memory, a data processor, an arithmetic and logic accumulation, and an interrupt. The microprocessor is connected to an output part of a driving apparatus, and a sensing part which senses the driving state of the output part, the ignition, the temperature, and a low voltage condition. The microprocessor communicates data with a timer display to indicate progressing control and a buzzer driving part.

REFERENCES:
patent: 4053868 (1977-10-01), Cox et al.
patent: 4593357 (1986-06-01), Van Ostrand et al.
patent: 4635030 (1987-01-01), Rauch

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