Ignition diagnostic monitor

Details Ignition diagnostic monitor Ignition diagnostic monitor

1984-09-04

1987-04-28

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

Electronic ignition system

328120, 324392, H04B 104, F02P 1700

Patent

active

046617787

ABSTRACT:
An ignition diagnostic monitor detects ignition malfunction. A first monostable multivibrator is coupled to an ignition module to receive the ignition signal and maintain a first logic state for a predetermined first time constant after detecting an ignition signal. The monostable multivibrator maintains a second logic level state after passage of the predetermined time constant until detection of another ignition signal occurs. The second logic level indicates a missed ignition signal and an ignition fault. A control module is coupled to the ignition module and the monostable multivibrator and receives a fault detection signal from the monostable multivibrator.

REFERENCES:
patent: 2847565 (1958-08-01), Clapper
patent: 3068367 (1962-12-01), Brown
patent: 3409824 (1968-11-01), Makuh
patent: 3496477 (1970-02-01), Page
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patent: 3965677 (1976-06-01), Goto et al.
patent: 3970872 (1976-07-01), Kuhn et al.
patent: 4040294 (1977-09-01), Matsuda et al.
patent: 4373186 (1983-02-01), Marshall
Frappier: "Single NAND-Gate Quad . . . "-Electronic Design-Aug. 20, 1981-pp. 158-159.

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