Communications: electrical – Selective – Having indication or alarm
Patent
1980-09-16
1982-02-09
Caldwell, Sr., John W.
Communications: electrical
Selective
Having indication or alarm
73118, 73346, 123198R, 340 57, 340595, 422 95, B60Q 100, G01K 704, G01K 1708
Patent
active
043152430
ABSTRACT:
The Unused Fuel Indicator (UFI) comprises a reliable thermo-electric/electronic circuit employing thermocouples attached to the catalytic converter of an emission control system for an automobile engine for providing easy readout of the condition of the automobile engine and the emission control system. A preferred kind of readout is provided by the sequential glowing of light indicators such as light emitting diodes (LEDs) wherein the sequence in which the LEDs are caused to glow, and their color is indicative of the proper functioning (or malfunctioning) of the automobile engine and catalytic converter emission control system. The UFI incrementally indicates the potential heat of pollutants in an automobile engine exhaust, which pollutants are converted by oxidation to heat produced by the catalytic converter. The heat is sensed by thermocouples which are differentially connected with the output of one opposing the output of the other. Hence, only the difference between the catalytic converters outlet temperature and inlet temperature is indicated to the driver of the vehicle (or other user of the UFI) by the incremental sequential glowing of the LEDs in a simple and effective manner that readily can be interpreted by an average driver, or inspector, mechanic, etc., who uses the UFI as a simple, inexpensive and effective engine emission system monitor.
The UFI is best when applied to a catalytic converter designed for the most stringent control of engine polluting emissions.
REFERENCES:
patent: 3882451 (1975-05-01), Fujishiro et al.
patent: 3921453 (1975-11-01), Platzer, Jr.
patent: 3969932 (1976-07-01), Rieger et al.
patent: 4122720 (1978-10-01), Podl
Caldwell Sr. John W.
Helzer Charles W.
Nowicki Joseph E.
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