Method for testing a pressure-medium-operated electronic brake system

A method for functionally testing a pressure-medium-operated electronic brake system of a vehicle, the brake system having:

• a valve and sensor device comprising:
• at least one pneumatic control pressure inlet and at least one pneumatic control pressure outlet;
• a plurality of valves selected from electrically activated inlet valves, outlet valves, redundancy valves, and pressure valves;
• an at least one actual pneumatic pressure sensor within the valve and sensor device configured to measure an actual pneumatic control pressure present at the at least one pneumatic control pressure outlet and to transmit an actual control pressure signal;
• an electronic control unit configured to receive pressure signals and to actuate the plurality of valves of the valve and sensor device,
• an at least one setpoint pressure sensor configured to measure a pneumatic setpoint control pressure in a pressure line connected to the at least one pneumatic control pressure inlet of the valve and sensor device and to transmit a setpoint control pressure signal to the electronic control unit;
• wherein the electronic control unit has a signal-conducting connection to:
• the electrically activated valves of the valve and sensor device;
• the at least one actual pneumatic pressure sensor of the valve and sensor device;
• and
• the at least one pneumatic setpoint pressure sensor;
• wherein:
• the valve and sensor device has a normal operating mode in which the electronic control unit is configured to actively regulate the actual pneumatic control pressure at the pneumatic control pressure outlet via the pneumatic setpoint control pressure;
• the valve and sensor device has a redundancy mode in which the electronic control unit is in a passive operating mode wherein the actual pneumatic control pressure present at the pneumatic control pressure outlet is generated directly by the pneumatic setpoint control pressure present at the pneumatic control pressure inlet;
• the method comprising:
• switching the valve and sensor device into the redundancy mode;
• measuring the pneumatic setpoint control pressure provided at the pneumatic control pressure inlet of the valve and sensor device via the pneumatic setpoint pressure sensor;
• transmitting the pneumatic setpoint control pressure as an input signal to the electronic control unit,
• measuring the actual pneumatic control pressure provided at the pneumatic control pressure outlet;
• transmitting the actual pneumatic control pressure as an input signal to the electronic control unit;
• performing a comparative plausibility check of the actual pneumatic control pressure and the setpoint pneumatic control pressure via the electronic control unit;
• detecting a malfunction of the pneumatic setpoint pressure sensor via a result of the comparative plausibility check;
• and
• storing or outputting a fault message.

A method for functionally testing a pressure-medium-operated electronic brake system of a vehicle with a valve and sensor device having:

• at least one control pressure inlet and at least one control pressure outlet;
• a plurality of valves selected from electrically activated inlet valves, outlet valves, redundancy valves, and pressure valves;
• an at least one actual pressure sensor configured to measure an actual control pressure at the at least one control pressure outlet and to transmit an actual control pressure signal;
• an at least one setpoint pressure sensor configured to measure a setpoint control pressure and transmit a setpoint control pressure signal;
• an electronic control unit configured to receive pressure signals and to actuate the plurality of valves, the electronic control unit having a signal-conducting connection to:
• the electrically activated valves;
• the at least one actual pressure sensor;
• and
• the at least one setpoint pressure sensor;
• wherein the valve and sensor device has a normal operating mode in which the electronic control unit is configured to actively regulate the actual control pressure at the control pressure outlet via the setpoint control pressure;
• wherein the valve and sensor device has a redundancy mode in which the electronic control unit is in a passive operating mode wherein the actual control pressure present at the control pressure outlet is generated directly by the setpoint control pressure present at the control pressure inlet;
• the method comprising:
• switching the valve and sensor device into the redundancy mode;
• wherein switching the valve and sensor device into the redundancy mode is carried out when the vehicle is in a predetermined specific operating state;
• wherein the predetermined specific operating state is one of a plurality of predetermined specific operating states, the plurality of predetermined specific operating states including both a “vehicle stationary state” operating state and a “first braking process after starting” operating state;
• measuring the setpoint control pressure provided at the control pressure inlet of the valve and sensor device via the setpoint pressure sensor;
• transmitting the setpoint control pressure as an input signal to the electronic control unit,
• measuring the actual control pressure provided at the control pressure outlet;
• transmitting the actual control pressure as an input signal to the electronic control unit;
• performing a comparative plausibility check of the actual control pressure and the setpoint control pressure via the electronic control unit;
• detecting a malfunction of the setpoint pressure sensor via a result of the comparative plausibility check;
• and
• storing or outputting a fault message.