Method for estimating the pressure in a wheel brake cylinder and control unit for carrying out the method

A control unit, comprising:

• at least one processor;
• and
• at least one memory device for storing at least one algorithm as a program code that causes the control unit to:
• calculate a first effective control time, assignable to an instantaneous controller cycle, of an actuating element actuating a wheel brake cylinder on the basis of one of a second control time definable by a control unit during the instantaneous controller cycle and the first effective control time assignable to a preceding controller system and a stroke of the actuating element relative to a maximum stroke, and
• calculate a pressure stroke in the wheel brake cylinder between two consecutive controller cycles based on:
• a pressure/volume characteristic, retrievable from the control unit, of the actuating element,
• an effective pressure difference across the actuating element, and
• the calculated first effective control time.

A data medium for storing at least one algorithm that causes a control unit to perform the steps of:

• calculating a first effective control time, assignable to an instantaneous controller cycle, of an actuating element actuating a wheel brake cylinder on the basis of one of a second control time definable by a control unit during the instantaneous controller cycle and the first effective control time assignable to a preceding controller system and a stroke of the actuating element relative to a maximum stroke;
• and
• calculating a pressure stroke in the wheel brake cylinder between two consecutive controller cycles based on:
• a pressure/volume characteristic, retrievable from the control unit, of the actuating element,
• an effective pressure difference across the actuating element, and
• the calculated first effective control time.