Method for operating an electro-hydraulic brake control unit and electro-hydraulic brake control unit

Abstract

The invention discloses a method (100) for operating an electro-hydraulic brake control unit (1) of a motor vehicle brake system with several hydraulic output ports (4a-4d) for hydraulically actuated wheel brakes (5a-5d) and an inlet valve (6a-6d) and an electrically actuated outlet valve (7a-7d) per output port (4a-4d), as well as an electrically actuated pressure source (2, 4) for hydraulically pressurizing the wheel brakes (5a-5d), wherein, for carrying out a heating phase, at least one normally closed outlet valve (7a-7d) is actuated to open for a longer period than is necessary for brake pressure regulation and / or in a period in which it is not necessary for brake pressure regulation and is kept open during the entire heating phase, and wherein, at least during a period of the heating phase, the at least one actuated outlet valve (7a-7d) is purged, in which, by means of the Pressure source (2,4) a volumetric delivery of pressure medium takes place through the at least one controlled outlet valve (7a-7d). The invention further provides an electro-hydraulic brake control unit (1) which is configured to carry out such a method (100).

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