Heater for motor vehicles which can be operated on several power

Details Heater for motor vehicles which can be operated on several power Heater for motor vehicles which can be operated on several power

1989-06-09

1991-01-15

Makay, Albert J.

Heating systems

Automatic control

Heat source is a reverse cycle refrigerating system or heat...

237 123C, 431 78, 431 75, 236 21R, G05D 2300

Patent

active

049847368

ABSTRACT:
By temperature gradient detection it is determined for the liquid combustion chamber auxiliary heater for motor vehicles, whether e.g. a flame blow-off has taken place, which has to be interpreted as a malfunction and hwich necessitates the discontinuation of fuel supply. Alternatively, it might merely show the switching from a high setting to a low setting. In the latter case a temperature drop to a lower operation temperature occurs also. However, the temperature drop is not as steep as in the case of a flame blow-off. At certain points in time t.sub.1 the target temperature for a point in time t.sub.2 is calculated by the detected temperature according to a certain algorithm having specific device properties as parameters. At this point in time the calculated target temperature is checked for errors.

REFERENCES:
patent: 4389184 (1983-06-01), Tanaka et al.

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