METHOD FOR DETECTION OF EMISSIONS LEVELS DURING EXTENDED ENGINE SPEED CONTROLLED OPERATION
First Claim
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1. A method for controlling engine operation during extended speed controlled conditions, comprising:
- monitoring mass airflow passing through the engine while operating the engine;
adjusting mass airflow responsive to engine speed to maintain a desired engine speed; and
shutting down the engine when engine mass airflow becomes higher than a predetermined mass airflow threshold.
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Abstract
A method for detection of emissions levels during extended engine speed controlled operation is provided. The method includes monitoring mass airflow passing through the engine while operating the engine. The method further includes adjusting mass airflow responsive to engine speed to maintain a desired engine speed. The method further includes shutting down the engine when engine mass airflow becomes higher than a predetermined mass airflow threshold.
20 Citations
20 Claims
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1. A method for controlling engine operation during extended speed controlled conditions, comprising:
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monitoring mass airflow passing through the engine while operating the engine; adjusting mass airflow responsive to engine speed to maintain a desired engine speed; and shutting down the engine when engine mass airflow becomes higher than a predetermined mass airflow threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for controlling engine operation during extended speed controlled conditions, comprising:
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adjusting mass airflow responsive to engine speed to maintain a desired engine speed; correlating an increase in mass airflow to an increase in carbon dioxide concentration and a decrease in oxygen concentration in ambient air wherein the increase in mass airflow is used to maintain engine speed; shutting down the engine if the carbon dioxide concentration is greater than a predetermined maximum carbon oxide threshold;
orshutting down the engine if the oxygen concentration is less than a predetermined minimum oxygen threshold. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A system for controlling a vehicle comprising an engine while operating in extended speed controlled conditions, the system comprising:
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an engine with an intake manifold comprising a mass airflow sensor; a map of constituent gas concentrations and mass airflow such that constituent gas concentrations are estimated by mass airflow; an alarm configured to initiate based on measured mass airflow and estimated constituent gas concentrations; and an electronic controller configured to compare measured mass airflow to a predetermined mass airflow threshold and configured to compare estimated constituent gas concentrations to a predetermined maximum carbon oxide threshold and a predetermined minimum oxygen threshold, wherein the electronic controller is further configured to initiate the alarm and engine shut-down if one or more of the predetermined mass airflow threshold, predetermined maximum carbon oxide threshold, and predetermined minimum oxygen threshold is met. - View Dependent Claims (20)
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Specification