Abstract: A control system for an engine having at least one manifold, a throttle, and a crank wheel, includes a pressure sensor to measure a pressure in the at least one manifold, a throttle position sensor to measure a position of the throttle of the engine, a revolution sensor to measure a rate of rotation of the crank wheel of the engine, a processor in communication with each of the pressure sensor, the throttle position sensor, and the revolution sensor to receive an input signal, analyze the input signal based upon an instruction set, and generate a control signal in response to analysis of the input signal, wherein the input signal is representative of at least one of the pressure, the throttle position, and the rate of rotation, and an engine system in communication with the processor and responsive to the control signal to control a function thereof.

Abstract: A control system for an engine having at least one manifold, a throttle, and a crank wheel includes a pressure sensor to measure a pressure in the at least one manifold and generate a pressure signal representing the pressure measured, a revolution sensor to measure a rate of rotation of the crank wheel of the engine and generate a rotation signal representing the rate of rotation measured, a processor in communication with each of the pressure sensor and the revolution sensor to receive the pressure signal and the rotation signal, analyze the pressure signal and the rotation signal based upon an instruction set to estimate a position of the throttle, and generate a control signal in response to the analysis of the pressure signal and the rotation signal; and an engine system to receive the control signal to control a function of the engine system.

Abstract: A control system for an engine having at least one manifold, a throttle, and a crank wheel, includes a pressure sensor to measure a pressure in the at least one manifold, a throttle position sensor to measure a position of the throttle of the engine, a revolution sensor to measure a rate of rotation of the crank wheel of the engine, a processor in communication with each of the pressure sensor, the throttle position sensor, and the revolution sensor to receive an input signal, analyze the input signal based upon an instruction set, and generate a control signal in response to analysis of the input signal, wherein the input signal is representative of at least one of the pressure, the throttle position, and the rate of rotation, and an engine system in communication with the processor and responsive to the control signal to control a function thereof.

Abstract: A method for detecting failures in a fuel system of a motor vehicle including monitoring a feed-forward table of a fuel pump controller that is electrically connected to a fuel pump of the fuel system. The fuel pump controller is electrically connected to a rail pressure sensor, which is coupled to the fuel injector rail. The actual fuel injector rail pressure measured by the rail pressure sensor is compared to a desired fuel injector rail pressure associated with the feed-forward table. The feed-forward table is adjusted if the actual fuel injector rail pressure is less than the desired fuel injector rail pressure. A fuel system error is signaled if an adjusted feed-forward table differs from an initial feed-forward table. A fuel system failure is signaled of the adjusted feed-forward table requires a saturation voltage of the controller.

Abstract: A method for detecting failures in a fuel system of a motor vehicle including monitoring a feed-forward table of a fuel pump controller that is electrically connected to a fuel pump of the fuel system. The fuel pump controller is electrically connected to a rail pressure sensor, which is coupled to the fuel injector rail. The actual fuel injector rail pressure measured by the rail pressure sensor is compared to a desired fuel injector rail pressure associated with the feed-forward table. The feed-forward table is adjusted if the actual fuel injector rail pressure is less than the desired fuel injector rail pressure. A fuel system error is signaled if an adjusted feed-forward table differs from an initial feed-forward table. A fuel system failure is signaled of the adjusted feed-forward table requires a saturation voltage of the controller.

Abstract: Method and system for controlling an internal combustion engine of a vehicle where a catalyst is communicated to engine exhaust gases including predicting occurrence of an impending engine operating event that will change an exhaust constituent in the engine exhaust gases, determining an oxygen content of exhaust gases downstream of the catalyst, and adjusting an air-fuel ratio of the engine based on the determined oxygen content and the predicted engine operating event to precondition the catalyst prior to occurrence of the particular event.

Abstract: Method and system for controlling an internal combustion engine of a vehicle where a catalyst is communicated to engine exhaust gases including predicting occurrence of an impending engine operating event that will change an exhaust constituent in the engine exhaust gases, determining an oxygen content of exhaust gases downstream of the catalyst, and adjusting an air-fuel ratio of the engine based on the determined oxygen content and the predicted engine operating event to precondition the catalyst prior to occurrence of the particular event.

Abstract: A system and method for adjusting fuel vapor delivery from a fuel vapor recovery system in an internal combustion engine. An engine controller calculates a purge fuel fraction that is indicative of an amount of fuel vapor passing through the vapor recovery system relative to a total amount of purge flow, including air, passing through the vapor recovery system. A purge percent fuel parameter indicative of an amount of fuel vapor delivered to the engine from the fuel vapor recovery system relative to a total amount of fuel delivered to the engine is calculated based on the purge fuel fraction. Finally, the controller adjusts an amount of fuel vapor released from the vapor recovery system based on the purge percent fuel parameter.

Abstract: A system and method for adjusting fuel vapor delivery from a fuel vapor recovery system in an internal combustion engine. A requested amount of fuel vapor delivery is determined based upon a desired fuel vapor delivery amount and various system constraints, which ensure continued optimal operation of the vehicle. Purge fuel ratios are calculated by comparing desired levels to actual levels of various operating parameters. The purge fuel ratios are compared to each other to determine the minimum value from among the various purge fuel ratios, which is indicative of the most limiting system constraint. The most limiting system constraint is used to calculate an amount of fuel vapor to be delivered from the vapor recovery system.