Heater module for the admission gases of an automobile engine with an overheating protection and/or closed-loop regulation
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United States of America Patent
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May 3, 2011
Grant Date -
Feb 12, 2009
app pub date -
Jan 21, 2005
filing date -
Jan 21, 2005
priority date (Note) -
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Abstract
Incorporates at least one thermal switch (5) in series with the heating resistor (4) of the module located on the frame (1) of said resistors (4) that cuts off current to the resistor (4) when the heater power control circuit fails. The thermal switch (5) can be between the heating resistor (4) and the earth connection of the support (6), or between the heating resistor (4) and the power supply (3) of the module. The module allows a closed-loop control using as variable the temperature of one of the resistors (4), whose resistivity can change with the temperature. Similarly, the electronic control circuit can also be integrated in the heater frame (1), allowing a closed-loop control of the dissipated power using as control variable the temperature of the frame (1).
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