Webasto Thermosysteme International Gmbh

Webasto Ag

Nikolaus Gerhardt

Friedrich Widemann

Andreas Ludwig

Nils Elm

Andreas May

Markus Griner

Karl GÖTTL

The invention relates to a control device () for an engine-independent heater () that heats a liquid heat transfer medium of a heat transfer medium circuit () especially for motor vehicles. Said control device () reduces a heater () capacity when an actual temperature gradient ((dT/dt) of the heat transfer medium is equal to or exceeds a temperature gradient threshold value ((dT/dt)). The control device () determines the temperature gradient threshold value ((dT/dt)) dynamically in accordance with a difference in temperature (&#x394;&#x3c6;) between a target temperature (&#x3c6;) of the heat transfer medium and an actual temperature (&#x3c6;) of the heat transfer medium. The invention further relates to a heater (), a heating system (), and a method for controlling the inventive heater ().

Control device for an engine-independent heater, heating system, and method for controlling an engine-independent heater

A heating system for heating air, especially for heating the interior of a motor vehicle, with a first heater (), a second heater (), and a flow path between the first heater () and the second heater (), there being at least one auxiliary fan () with which a flow in the direction from the second heater () to the first heater () can be produced and a process for influencing the air flows in the heating system are designed to counteract overpressurization. Furthermore, an air heater and a process for detecting backflowing hot air through an air heater use a temperature sensor in an inlet area of the heater for that purpose.

Heating system and process for influencing air flows in a heating system

A heating system for heating air, especially for heating the interior of a motor vehicle, with a first heater ( ), a second heater ( ), and a flow path between the first heater ( ) and the second heater ( ), there being at least one auxiliary fan ( ) with which a flow in the direction from the second heater ( ) to the first heater ( ) can be produced and a process for influencing the air flows in the heating system are designed to counteract overpressurization. Furthermore, an air heater and a process for detecting backflowing hot air through an air heater use a temperature sensor in an inlet area of the heater for that purpose.

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Oberschleissheim, Germany

Nikolaus Gerhardt