Method for detection of emissions levels during extended engine speed controlled operation
First Claim
Patent Images
1. An engine control method of a hybrid vehicle, comprising:
- during extended idle-speed control engine operating conditions of the hybrid vehicle;
monitoring mass airflow passing through an engine;
adjusting mass airflow responsive to engine speed to maintain a desired engine speed; and
automatically shutting down the engine when engine mass airflow becomes higher than a predetermined mass airflow threshold for a duration greater than a threshold duration.
1 Assignment
0 Petitions
Accused Products
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.
15 Citations
19 Claims
-
1. An engine control method of a hybrid vehicle, comprising:
during extended idle-speed control engine operating conditions of the hybrid vehicle; monitoring mass airflow passing through an engine; adjusting mass airflow responsive to engine speed to maintain a desired engine speed; and automatically shutting down the engine when engine mass airflow becomes higher than a predetermined mass airflow threshold for a duration greater than a threshold duration.
-
2. An engine control method, comprising:
during extended idle-speed control engine operating conditions; monitoring mass airflow passing through an engine; adjusting the mass airflow responsive to engine speed to maintain a desired engine speed; and automatically shutting down the engine when engine mass airflow becomes higher than a predetermined mass airflow threshold for a duration greater than a threshold duration. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
14. A method for controlling engine operation during extended speed controlled conditions, comprising:
during extended engine idling conditions; adjusting mass airflow responsive to engine speed to maintain a desired engine idle 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 an engine if the carbon dioxide concentration is greater than a predetermined maximum carbon oxide threshold; and shutting down the engine if the oxygen concentration is less than a predetermined minimum oxygen threshold. - View Dependent Claims (15, 16, 17, 18, 19)
Specification