Method and device for identifying errors in emission-relevant control devices in a vehicle
First Claim
1. A method of detecting faults in a plurality of emission-relevant control devices comprising the steps:
- detecting a respective value for each of a plurality of different emission-relevant parameters, each emission-relevant parameter associated with emission behavior of one or more of the plurality of emission-relevant control devices;
for each one of the emission-relevant parameters;
comparing the detected value for the respective emission-relevant parameter with a setpoint range associated with that emission-relevant parameter,storing a fault value for the the respective emission-relevant parameter based on the results of the comparison, including;
if it is determined that the detected value for the respective emission-relevant parameter lies outside of the associated setpoint range for that emission-relevant parameter, storing a fault value that correlates with an emission increase, andif it is determined that the detected value for the respective emission-relevant parameter lies within the associated setpoint range for that emission-relevant parameter, storing a fault value of zero,calculating a total fault value by adding all of the fault values of the plurality of parameters to form a sum, andproviding a fault message if the total fault value exceeds a defined threshold value.
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Abstract
A method and a device for identifying errors in emission-relevant control devices of a vehicle, such as the injection of fuel into a cylinder, allows error identification even if none of the sub-systems exceeds a predetermined threshold value. The method has the following steps: determining whether at least one parameter, which permits conclusions to be drawn about the emission behavior of the respective control device, lies in a desired range; if the parameter lies outside said desired range, an error value that correlates to an increase in emissions is stored; if the parameter is in the desired range, an error value of zero is stored; a total error value is formed from all error values of the control device and an error message is output if the total error value exceeds a predetermined threshold value.
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Citations
19 Claims
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1. A method of detecting faults in a plurality of emission-relevant control devices comprising the steps:
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detecting a respective value for each of a plurality of different emission-relevant parameters, each emission-relevant parameter associated with emission behavior of one or more of the plurality of emission-relevant control devices; for each one of the emission-relevant parameters; comparing the detected value for the respective emission-relevant parameter with a setpoint range associated with that emission-relevant parameter, storing a fault value for the the respective emission-relevant parameter based on the results of the comparison, including; if it is determined that the detected value for the respective emission-relevant parameter lies outside of the associated setpoint range for that emission-relevant parameter, storing a fault value that correlates with an emission increase, and if it is determined that the detected value for the respective emission-relevant parameter lies within the associated setpoint range for that emission-relevant parameter, storing a fault value of zero, calculating a total fault value by adding all of the fault values of the plurality of parameters to form a sum, and providing a fault message if the total fault value exceeds a defined threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An arrangement for detecting faults in a plurality of emission-relevant control devices comprising:
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a system for detecting a respective value for each of a plurality of different emission-relevant parameters, each parameter associated with emission behavior of one or more of the plurality of emission-relevant control devices; a processing device and a memory device for determining and storing fault values for each of the plurality of emission-relevant parameters by; for each one of the emission-relevant parameters; comparing the detected value for the respective emission-relevant parameter within with a setpoint range associated with that emission-relevant parameter, storing a fault value, which correlates with an emission increase, if it is determined that the detected value for the respective emission-relevant parameter lies outside of the associated setpoint range for that parameter, and storing a fault value of zero if it is determined that the detected value for the respective emission-relevant parameter lies within the associated setpoint range for that parameter, and a device for calculating a total fault value by adding all of the fault values of the plurality of emission-relevant control devices to form a sum, and for providing a fault message if the total fault value exceeds a predetermined threshold value. - View Dependent Claims (13, 14, 15)
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16. A system for detecting faults in a plurality of emission-relevant control devices comprising:
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means for detecting a respective value for each of a plurality of different emission-relevant parameters, each parameter associated with emission behavior of one or more of the plurality of emission-relevant control devices; means for determining and storing fault values for each of the plurality of emission-relevant parameters by; for each one of the emission-relevant parameters; comparing the detected value for the respective emission-relevant parameter with a setpoint range associated with that emission-relevant parameter, storing a fault value that correlates with an emission increase if it is determined that the detected value for the respective emission-relevant parameter that lies outside of the associated setpoint range for that parameter, and storing a fault value of zero if it is determined the detected value for the respective emission-relevant parameter that lies within the associated setpoint range for that parameter, means for calculating a total fault value by adding all of the fault values of the plurality of parameters, and means for providing a fault message if the total fault value exceeds a defined threshold value. - View Dependent Claims (17, 18, 19)
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Specification