Control circuit for a passenger protection device in a motor vehicle and corresponding method of operation
First Claim
1. A control circuit for at least one vehicle-occupant protection system in a motor vehicle, comprising:
- a plurality of sensors to detect a respective parameter of the motor vehicle;
an evaluation unit which is connected to the sensors at the input end to generate a triggering signal which activates the vehicle-occupant protection system based on the measured parameters when there is an accident;
a check unit, which is connected to the sensors at the input end, to check a mutual plausibility of the parameters which are measured by the sensors and to output a first disable signal for the vehicle-occupant protection system when there is an errored plausibility check; and
a logic circuit, which is connected at the input end to the evaluation unit and to the check unit and at the output end to the vehicle-occupant protection system for disabling activation of the vehicle-occupant protection system when the first disable signal is present, wherein to simulate a malfunction of the sensors and/or of the check unit, at least one excitation element provided which excites a single sensor or some of the sensors and simulates a malfunction of the rest of the sensors.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a control circuit for at least one passenger protection system (6-8) in a motor vehicle, comprising a plurality of sensors for detecting a respective parameter of the motor vehicle, and an evaluation unit connected to the sensors at the input side and adapted to produce, in accordance with the measured parameters, a release signal (Enable1) activating the passenger protection device in the case of an accident. The control circuit further comprises a check unit (10) connected to the sensors at the input side and adapted to check the mutual plausibility of the parameters measured by the sensors and to output a first disable signal (Error) for the passenger protection device in the case of an incorrect plausibility check. A logical circuit (11-14, 21-28) is connected to the evaluation unit (4, 5) and the check unit on the input side and to the passenger protection device on the output side and blocks activation of the passenger protection device when a first disable signal (Error) is received. At least one inducer element (15-17) is provided for simulating a malfunction of the sensors and/or of the check unit. Said inducer element simulates only a single sensor or only a part of the sensors, thereby simulating a malfunction of the remaining sensors.
-
Citations
15 Claims
-
1. A control circuit for at least one vehicle-occupant protection system in a motor vehicle, comprising:
-
a plurality of sensors to detect a respective parameter of the motor vehicle;
an evaluation unit which is connected to the sensors at the input end to generate a triggering signal which activates the vehicle-occupant protection system based on the measured parameters when there is an accident;
a check unit, which is connected to the sensors at the input end, to check a mutual plausibility of the parameters which are measured by the sensors and to output a first disable signal for the vehicle-occupant protection system when there is an errored plausibility check; and
a logic circuit, which is connected at the input end to the evaluation unit and to the check unit and at the output end to the vehicle-occupant protection system for disabling activation of the vehicle-occupant protection system when the first disable signal is present, wherein to simulate a malfunction of the sensors and/or of the check unit, at least one excitation element provided which excites a single sensor or some of the sensors and simulates a malfunction of the rest of the sensors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An operating method for a control circuit, comprising:
-
measuring at least one parameter of the motor vehicle by a plurality of sensors;
evaluating the parameters which are measured by the sensors to detect an accident;
performing a mutual plausibility check of the parameters measured by the sensors during normal operation; and
activating at least one vehicle-occupant protection system when there is an accident and a successful plausibility check, wherein at least one sensor is excited in a self-test to simulate a malfunction of the rest of the other sensors, the activation of the vehicle-occupant protection system being disabled if the plausibility check proceeds without errors despite the simulated malfunction of the sensors. - View Dependent Claims (14, 15)
-
Specification