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US 2018/0023523 A1Published application
Secondary system and method for controlling an engine
AssigneeFord Global Technologies, LLC
InventorsHassene Jammoussi, Imad Hassan Makki
Life of this patent
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Abstract
Systems and methods for evaluating whether or not degradation of an engine air intake air filter is present based on a pressure drop across the air filter are presented. In one example, a mean and standard deviation of a pressure drop across an air filter are a basis for indicating whether or not the air filter is degraded. Further, the mean and standard deviation are a basis for estimating a useful life cycle of the air filter.
Claims20
An engine air filter diagnostic method, comprising:
- indicating via a controller, engine air filter degradation in response to a mean of a pressure change across an engine air filter, the pressure change across the engine air filter based on data observed via the controller during transient air flow conditions through the engine air filter.
An engine air filter diagnostic method, comprising:
- indicating via a controller, air filter degradation in response to a mean of a pressure change across an engine air filter and a standard deviation of the pressure change across the engine air filter, the pressure change across the engine air filter based on data observed via the controller during conditions where air is flowing through the engine air filter.
An engine system, comprising:
- an engine;
- an engine air intake including an air filter, a throttle, and an intake manifold;
- a pressure sensor located along the engine air intake;
- and
- a controller including executable instructions stored in non-transitory memory to indicate degradation of the air filter in response to a mean pressure drop across the air filter during transient air flow through the air filter.
2 more elements
Dependencies are inferred from the claim text.