Simulative temperature controller for a motor vehicle

Details Simulative temperature controller for a motor vehicle Simulative temperature controller for a motor vehicle

1984-01-16

1985-03-12

Paschall, M. H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219205, 219202, 219501, 123179H, H05B 102

Patent

active

045047324

ABSTRACT:
A heating device for use in motor vehicles to rapidly heat combustion chambers, exhaust gas sensors, catalyzers and other associated apparatus. A resistive heating element is connected in series with a low-impedance measuring resistor and a switch across a power source, while a resistance bridge is formed with the aid of two further resistors. The diagonal bridge voltages are compared in a comparator whose output actuates a control circuit which operates the heater switch. The heater switch also provides the power for the comparator. In a first interval, constant current is applied to the heating element, while the current is pulsed during a second time interval. The switch control pulses may be provided by a free-running oscillator or one whose pulses are synchronized with the undulations of the engine starter current.

REFERENCES:
patent: 3794808 (1974-02-01), Takagi
patent: 3881085 (1975-04-01), Traister
patent: 3944893 (1976-03-01), Hayden
patent: 3973140 (1976-08-01), Phillips
patent: 4072997 (1978-02-01), Boothman et al.
patent: 4106465 (1978-08-01), Bernhardt et al.
patent: 4130853 (1978-12-01), Baker
IBM Technical Disclosure, vol. 16, number 9, 2-1974, "Complete Half-Wave Thyristor Control".

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