Abstract: A secondary air injection system to aid in the warm-up of a catalyst employed as part of an emissions control system of a vehicle to obtain efficient reduction in engine emissions. A compressor utilized to compress or boost air for increased engine performance is additionally used as a secondary air injection source, eliminating the need for external air pumps. The compressor is configured to transmit boosted air to the engine of the vehicle or to the catalyst to aid in the warm-up of the catalyst. A valve having an open configuration and a closed configuration controls the passage of the boosted air to the engine or to the catalyst. The valve may be controlled by a controller based upon airflow, temperature, pressure, or time. A control map relating engine speed to airflow may be used for obtaining airflow values for controlling the configuration of the valve.

Abstract: A secondary air injection system to aid in the warm-up of a catalyst employed as part of an emissions control system of a vehicle to obtain efficient reduction in engine emissions. A compressor utilized to compress or boost air for increased engine performance is additionally used as a secondary air injection source, eliminating the need for external air pumps. The compressor is configured to transmit boosted air to the engine of the vehicle or to the catalyst to aid in the warm-up of the catalyst. A valve having an open configuration and a closed configuration controls the passage of the boosted air to the engine or to the catalyst. The valve may be controlled by a controller based upon airflow, temperature, pressure, or time. A control map relating engine speed to airflow may be used for obtaining airflow values for controlling the configuration of the valve.

Abstract: The present invention relates to a method and apparatus for three dimensional calibration of an on-board diagnostics system. In one embodiment, the present invention is a method for calibrating an on-board diagnostic system for an automobile including the steps of generating a three dimensional surface corresponding to an engine operating under a first condition, generating a three dimensional surface corresponding to the engine operating under a second condition, and generating a three dimensional threshold surface using the three dimensional surface corresponding to the engine operating under the first condition and the three dimensional surface corresponding to the engine operating under the second condition.

Abstract: The present invention relates to a method and apparatus for three dimensional calibration of an on-board diagnostics system. In one embodiment, the present invention is a method for calibrating an on-board diagnostic system for an automobile including the steps of generating a three dimensional surface corresponding to an engine operating under a first condition, generating a three dimensional surface corresponding to the engine operating under a second condition, and generating a three dimensional threshold surface using the three dimensional surface corresponding to the engine operating under the first condition and the three dimensional surface corresponding to the engine operating under the second condition.

Abstract: The present invention relates to a method and apparatus for three dimensional calibration of an on-board diagnostics system. In one embodiment, the present invention is a method for calibrating an on-board diagnostic system for an automobile including the steps of generating a three dimensional surface corresponding to an engine operating under a first condition, generating a three dimensional surface corresponding to the engine operating under a second condition, and generating a three dimensional threshold surface using the three dimensional surface corresponding to the engine operating under the first condition and the three dimensional surface corresponding to the engine operating under the second condition.

Abstract: The present invention relates to a method and apparatus for three dimensional calibration of an on-board diagnostics system. In one embodiment, the present invention is a method for calibrating an on-board diagnostic system for an automobile including the steps of generating a three dimensional surface corresponding to an engine operating under a first condition, generating a three dimensional surface corresponding to the engine operating under a second condition, and generating a three dimensional threshold surface using the three dimensional surface corresponding to the engine operating under the first condition and the three dimensional surface corresponding to the engine operating under the second condition.

Abstract: Injection of secondary air into an exhaust of an automotive vehicle at a location upstream of a catalytic converter of the vehicle in which the airflow rate is calculated by the air injection system pressure and by the pulsation of the air injection system pressure in reference to stored values in a data table.

Abstract: Injection of secondary air into an exhaust of an automotive vehicle at a location upstream of a catalytic converter of the vehicle in which the airflow rate is calculated by the air injection system pressure and by the pulsation of the air injection system pressure in reference to stored values in a data table.