Exhaust temperature monitoring system

Details Exhaust temperature monitoring system Exhaust temperature monitoring system

1976-11-01

1978-03-14

Myhre, Charles J.

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

123198DB, 123 4115, 73137, 733435, 323 75H, 340 57, F02B 7708

Patent

active

040785319

ABSTRACT:
An exhaust temperature monitoring unit is provided with a thermocouple connected in opposition to a reference signal across the differential inputs of an operational amplifier. Both the thermocouple and the reference signal are connected to a common ground which is isolated from the vehicle chassis. This provides a floating reference point which is insensitive to variations in ground potential and eddy current in the vehicle chassis. The operational amplifier drives an optical coupling unit which in turn controls various alarms and vehicle controls.

REFERENCES:
patent: 2359767 (1944-10-01), Keinath
patent: 3401274 (1968-09-01), Marsh
patent: 3568648 (1971-03-01), Cass
patent: 3599049 (1971-08-01), Barnard
patent: 3602207 (1971-08-01), Kilmer
patent: 3763397 (1973-10-01), Lockers
patent: 3775745 (1973-11-01), Kelley
patent: 3817104 (1974-06-01), Sapic
patent: 3841291 (1974-10-01), Ludewig et al.
patent: 3851469 (1974-12-01), Eichler et al.
patent: 3895283 (1975-07-01), Peterson

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