Injector control performance diagnostic systems
First Claim
Patent Images
1. A diagnostic system for a fuel injector control system, comprising:
- an initialization state monitoring module that determines whether a driver circuit for a solenoid is in an initialized state or an un-initialized state in a first sampling interval, and that generates a first fault signal when a first number of times that the driver circuit is in the un-initialized state reaches a first predetermined number;
a driving state monitoring module that determines whether the driver circuit for the solenoid is in a driving state or a non-driving state in a second sampling interval, and that generates a second fault signal when a second number of times that the driver circuit is in the non-driving state reaches a second predetermined number;
a voltage monitoring module that determines whether a voltage level of the driver circuit for the solenoid is less than a desired boost voltage in a third sampling interval, and that generates a third fault signal when a third number of times that the voltage level is less than the desired boost voltage reaches a third predetermined number,wherein the first fault signal, the second fault signal, and the third fault signal are independent signals; and
a fault determination module that communicates with the initialization state monitoring module, the driving state monitoring module, and the voltage monitoring module, and that diagnoses a fault in the driver circuit for the solenoid in response to any one of the first fault signal, the second fault signal, and the third fault signal.
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Abstract
A diagnostic system for a fuel injector control system according to the present disclosure includes a plurality of state monitoring modules and a fault determination module. The plurality of state monitoring module monitor a plurality of states of a driver circuit for a fuel injector based on data samples related to the plurality of states. The fault determination module diagnoses a fault in the driver circuit when at least one of the plurality of state monitoring modules receives a predetermined number of data samples indicating an undesired state within a sampling interval.
16 Citations
12 Claims
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1. A diagnostic system for a fuel injector control system, comprising:
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an initialization state monitoring module that determines whether a driver circuit for a solenoid is in an initialized state or an un-initialized state in a first sampling interval, and that generates a first fault signal when a first number of times that the driver circuit is in the un-initialized state reaches a first predetermined number; a driving state monitoring module that determines whether the driver circuit for the solenoid is in a driving state or a non-driving state in a second sampling interval, and that generates a second fault signal when a second number of times that the driver circuit is in the non-driving state reaches a second predetermined number; a voltage monitoring module that determines whether a voltage level of the driver circuit for the solenoid is less than a desired boost voltage in a third sampling interval, and that generates a third fault signal when a third number of times that the voltage level is less than the desired boost voltage reaches a third predetermined number, wherein the first fault signal, the second fault signal, and the third fault signal are independent signals; and a fault determination module that communicates with the initialization state monitoring module, the driving state monitoring module, and the voltage monitoring module, and that diagnoses a fault in the driver circuit for the solenoid in response to any one of the first fault signal, the second fault signal, and the third fault signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A diagnostic method for a fuel injector control system, the method comprising:
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determining whether a driver circuit for a solenoid is in an initialized state or an un-initialized state in a first sampling interval; generating a first fault signal when a first number of times that the driver circuit is in the un-initialized state reaches a first predetermined number; determining whether the driver circuit for the solenoid is in a driving state or a non-driving state in a second sampling interval; generating a second fault signal when a second number of times that the driver circuit is in the non-driving state reaches a second predetermined number; determining whether a voltage level of the driver circuit for the solenoid is less than a desired boost voltage in a third sampling interval; generating a third fault signal when a third number of times that the voltage level is less than the desired boost voltage reaches a third predetermined number, wherein the first fault signal, the second fault signal, and the third fault signal are independent signals; and diagnosing a fault in the driver circuit for the solenoid in response to any one of the first fault signal, the second fault signal, and the third fault signal. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification