Manifold air flow (MAF) and manifold absolute pressure (MAP) residual electronic throttle control (ETC) security
First Claim
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1. An engine fault diagnostic system, comprising:
- a diagnostic module that generates a manifold absolute pressure (MAP) error signal and that generates a mass air flow (MAF) error signal; and
a security module that generates an air flow fault when said MAP error signal exceeds a MAP threshold and said MAF error signal exceeds a MAF threshold.
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Abstract
An engine fault diagnostic system includes a diagnostic module that generates a manifold absolute pressure (MAP) error signal and that generates a mass air flow (MAF) error signal. A security module generates an air flow fault when the MAP error signal exceeds a MAP threshold and the MAF error signal exceeds a MAF threshold.
47 Citations
14 Claims
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1. An engine fault diagnostic system, comprising:
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a diagnostic module that generates a manifold absolute pressure (MAP) error signal and that generates a mass air flow (MAF) error signal; and
a security module that generates an air flow fault when said MAP error signal exceeds a MAP threshold and said MAF error signal exceeds a MAF threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of monitoring an air flow condition of an engine intake system, comprising:
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determining a manifold absolute pressure (MAP) error;
determining a mass air flow (MAF) error; and
generating an air flow fault when said MAP error exceeds a MAP threshold and said MAF error exceeds a MAF threshold. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification