Patent application number | Description | Published |
20100206269 | FUEL INJECTOR FLOW CORRECTION SYSTEM FOR DIRECT INJECTION ENGINES - A fuel control system for an engine includes a control module that includes a fuel rail pressure module and a comparison module. The fuel rail pressure module determines a first fuel rail pressure of a fuel rail after a first event and a second fuel rail pressure of the fuel rail after a second event. The first event includes N conditions, a first of the N conditions comprises deactivation of a fuel pump of the engine, and N is an integer. The second event includes M conditions, a first of the M conditions comprises activation of a fuel injector, and M is an integer. The comparison module adjusts a fuel injector constant of the fuel injector based on the first fuel rail pressure, the second fuel rail pressure, and an injector activation period corresponding to the second event. | 08-19-2010 |
20100318278 | ENGINE VALVE LIFT CONTROL SYSTEMS AND METHODS FOR REDUCED FUEL CONSUMPTION - A fuel control system of an engine includes a fuel economy module. The fuel economy module determines a first valve lift state and a second valve lift state of a valve of the engine. The fuel economy module generates a first fuel consumption signal based on the first valve lift state and an engine torque request signal, and generates a second fuel consumption signal based on the second valve lift state and the engine torque request signal. The fuel control system also includes a valve lift state module. The valve lift state module selects one of the first valve lift state and the second valve lift state based the first fuel consumption signal and the second fuel consumption signal. The valve lift state module generates a valve lift select signal. The valve lift select signal indicates the selected one of the first valve lift state and the second valve lift state. | 12-16-2010 |
20110056448 | DIAGNOSTIC SYSTEMS AND METHODS FOR A TWO-STEP VALVE LIFT MECHANISM - A system includes a pressure signal adjustment module that generates a maximum pressure signal based on a fluid pressure signal from a pressure sensor of a camshaft phaser system of an engine. The pressure signal adjustment module detects a maximum peak value of the fluid pressure signal and maintains the maximum pressure signal at the maximum peak value for a peak and hold period. A diagnostic module detects a fault of the camshaft phaser system based on the maximum pressure signal during the peak and hold period. | 03-10-2011 |
20110094465 | TWO-STEP VALVE LIFTER CONTROL SYSTEMS AND METHODS - A valve lifter control system includes a valve lifter control module and a forced transition determination module. The valve lifter control module determines a desired lift state of a valve lifter based on at least one of engine speed and engine load. The forced transition determination module initiates a forced transition of the valve lifter from the low-lift state to the high-lift state based on manifold vacuum independently of the desired lift state. | 04-28-2011 |
20120036839 | VEHICLE OXIDATION CATALYST EFFICIENCY MODEL FOR ADAPTIVE CONTROL AND DIAGNOSTICS - A vehicle includes a fuel tank, an internal combustion engine, an oxidation catalyst, a regenerable particulate filter in fluid communication with an outlet side of the oxidation catalyst, and a host machine. The host machine calculates an actual hydrocarbon level in the exhaust stream downstream of the particulate filter as a function of an actual energy input value and an actual output value of the oxidation catalyst, and subsequently executes a control action using the actual hydrocarbon level. A method for use aboard the vehicle includes using the host machine to calculate an actual hydrocarbon level in the exhaust stream downstream of the particulate filter, including solving a function of an actual energy input value and an actual energy output value of the oxidation catalyst, and executing a control action aboard the vehicle via the host machine using the actual hydrocarbon level. | 02-16-2012 |
20120067026 | Exhaust Gas Treatment System for an Internal Combustion Engine - An exhaust gas treatment system for an internal combustion engine comprises an oxidation catalyst device configured to oxidize the hydrocarbon and carbon monoxide in the exhaust gas. A first temperature sensor is located downstream of the oxidation catalyst device and has a temperature probe that is in fluid communication with the exhaust gas flow exiting the oxidation catalyst device. A second temperature sensor is located downstream of the oxidation catalyst device and has a temperature probe that is in fluid communication with the exhaust gas flow exiting the oxidation catalyst device. The temperature probe includes a catalyst compound coating disposed thereon and is operable to catalyze the oxidation of CO and HC, or a combination thereof, that exits the oxidation catalyst device. A controller is in signal communication with temperature sensors and is configured to monitor signals from temperature sensors to determine if the temperature differential exceeds a predetermined threshold. | 03-22-2012 |
20120072092 | FUEL CONTROL DIAGNOSTIC SYSTEM AND METHOD - A diagnostic system for an engine includes an error detection module and a diagnostic module. The error detection module selectively detects a fuel control error based on a change in a fuel correction value used to determine a quantity of fuel supplied directly to an exhaust system. The diagnostic module identifies a cause of the fuel control error based on a period since a last refueling event. The diagnostic module identifies the cause as one of variation in an actual heating value of the fuel and faulty operation of a fuel injection system that supplies the fuel. The diagnostic module further identifies the cause based on a first amount of the fuel contained in a fuel tank at a start of the last refueling event and a second amount of the fuel added to the fuel tank during the last refueling event. A control system and method are also provided. | 03-22-2012 |
20130041532 | SYSTEM AND METHOD FOR INCREASING OPERATING EFFICIENCY OF A HYBRID VEHICLE - A method is provided for controlling a hybrid electric vehicle that includes an internal combustion engine having a cylinder with first and second intake valves and a piston configured to rotate the engine's crankshaft. The method includes determining whether deceleration of the vehicle is desired and ceasing supply of fuel to the cylinder when such condition is satisfied. The method also includes closing the first intake valve at a first predetermined instance and closing the second intake valve at a second predetermined instance via a specifically configured device when the fuel supply has been ceased. The second predetermined instance is after the first predetermined instance relative to rotational position of the crankshaft and magnitude of compression pulses in the cylinder during deceleration is reduced relative to when the cylinder is being fueled. A system for controlling the hybrid vehicle and a vehicle employing such a system are also provided. | 02-14-2013 |
20130186063 | EXHAUST SYSTEM AND METHOD FOR CONTROLLING AN EXHAUST SYSTEM - In one exemplary embodiment of the invention, a method for controlling an exhaust system includes determining an air to fuel ratio within a combustion chamber of an internal combustion engine, measuring a temperature of an exhaust gas flow from the internal combustion engine into the exhaust system and determining a specific heat for the exhaust gas flow in a first segment of the exhaust system based on the temperature of the exhaust gas flow from the internal combustion engine and the air to fuel ratio, wherein the first segment is upstream of the particulate filter. The method also includes determining a first temperature of the exhaust gas in the first segment based on the specific heat for the exhaust gas flow and selectively controlling a regeneration process for the particulate filter using the determined temperature of the exhaust gas at the selected location. | 07-25-2013 |
20130245918 | EXHAUST SYSTEM AND METHOD FOR CONTROLLING TEMPERATURE OF EXHAUST GAS IN AN EXHAUST SYSTEM - In one exemplary embodiment of the invention, an internal combustion engine includes a fuel system in fluid communication with a cylinder to direct a fuel flow to be mixed with air in the cylinder and an exhaust system in fluid communication with the cylinder to receive an exhaust gas produced by the combustion process, wherein the exhaust system includes an oxidation catalyst, a particulate filter downstream of the oxidation catalyst. The system also includes a control module that determines an amount of energy to be provided by at least one of: a post-injection process, hydrocarbon injector, and heating device, wherein the amount of energy is based on a desired temperature at a selected location in the exhaust system, an exhaust gas flow rate, a temperature of the received exhaust gas, a flow rate and temperature of the exhaust gas at the inlet of the oxidation catalyst. | 09-19-2013 |
20130263576 | INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING INTERNAL COMBUSTION ENGINE SPEED - In one exemplary embodiment of the invention a method for controlling a speed of an internal combustion engine includes shutting off fuel flow into a cylinder to reduce the speed of the internal combustion engine. The method also includes providing an electrical load to an alternator of the internal combustion engine, further reducing the speed of the internal combustion engine. | 10-10-2013 |
20140121944 | FUEL CONTROL SYSTEMS AND METHODS FOR COLD STARTS OF AN ENGINE - A control system includes a starter control module, a mode setting module, a fuel pressure control module, and a fuel control module. The starter control module initiates cranking of a spark ignition direct injection (SIDI) engine in response to user actuation of an ignition switch. The mode setting module sets a mode of operation to a cold start mode when an engine coolant temperature is less than a predetermined temperature during the cranking. The fuel pressure control module, in response to the setting of the mode to the cold start mode, determines a target fuel rail pressure. The fuel control module controls fueling during the cranking based on the target fuel rail pressure. | 05-01-2014 |
20140172274 | SYSTEMS AND METHODS FOR FUEL CONTROL DURING COLD STARTS - A cold start control system for a vehicle having a spark ignition direct injection (SIDI) engine includes a startup control module and a fuel actuator module. The startup control module sets a mode of operation to a cold start mode. In response to setting the mode to the cold start mode, the startup control module determines target combustion parameters and a predetermined amount of fuel, wherein the predetermined amount of fuel is less than an amount of fuel required to initiate a combustion stroke of the SIDI engine. The startup control module controls injection of the predetermined amount of fuel, during cranking of the SIDI engine, based on the target combustion parameters. The fuel actuator module injects the predetermined amount of fuel, during cranking, based on the target combustion parameters. | 06-19-2014 |
20140238344 | SYSTEM AND METHOD FOR LIMITING A VOLUMETRIC EFFICIENCY OF AN ENGINE DURING ENGINE CRANKING TO REDUCE EMISSION - A system according to the principles of the present disclosure includes an engine cranking module and a throttle control module. The engine cranking module determines whether an engine is cranking based on at least one of an input received from an ignition system and engine speed, and generates a signal indicating whether the engine is cranking. The throttle control module selectively adjusts a throttle of the engine to a fully closed position when the signal indicates that the engine is cranking. | 08-28-2014 |
Patent application number | Description | Published |
20090216428 | LATE INTAKE VALVE CLOSING TO IMPROVE COLD STARTABILITY FOR SPARK-IGNITION DIRECT-INJECTION (SIDI) ENGINES - An engine control system includes a cam phaser that introduces a cam phase angle θ between a camshaft intake lobe and an associated crankshaft. An engine control module communicates with the cam phaser to introduce the cam phase angle θ while an engine is being started. The cam phase angle θ is selected such that the camshaft intake lobe opens an intake valve during at least a portion of a compression stroke of a cylinder that is associated with the camshaft intake lobe. | 08-27-2009 |
20100199951 | ADAPTIVE CONTROL OF FUEL DELIVERY IN DIRECT INJECTION ENGINES - An adaptive fuel delivery control system includes a pressure monitoring module and a flow rate determination module. The pressure monitoring module determines an actual pressure drop after a fuel injection event on an injector. The flow rate determination module determines an adjusted flow rate based on a reference flow rate and the pressure drop. | 08-12-2010 |
20100224169 | METHOD AND APPARATUS FOR CONTROLLING FUEL RAIL PRESSURE USING FUEL PRESSURE SENSOR ERROR - A control system and method for controlling a fuel system of an engine includes a steady state determination module determining the engine is operating at a steady state and a memory storing a first fuel correction. A fuel pump control module commands a predetermined fuel rail pressure change. The memory stores a second fuel correction after the predetermined fuel rail pressure change. A sensor error correction module determines a fuel rail pressure sensor error based on the first fuel correction and the second fuel correction and determines a fuel rail pressure in response to the sensor error. | 09-09-2010 |
20100268439 | CONTROL OF FUEL PUMP BY QUANTIFYING PERFORMANCE - An engine control system comprises a fuel pump control module and a diagnostic module. The fuel pump control module controls a pressure pump to inject fuel into a fuel rail. The diagnostic module determines an estimated pressure increase within the fuel rail based on the injected fuel, compares an actual pressure increase within the fuel rail to the estimated pressure increase, and indicates when the actual pressure increase is less than the estimated pressure increase. | 10-21-2010 |
20100324794 | TORQUE CONVERTER CONTROL FOR VARIABLE VALVE LIFT POWERTRAIN SYSTEMS - A control system for a powertrain of a vehicle includes a torque module and a damping control module. The torque module determines a first output torque and a second output torque of the engine. The second output torque is determined after the first output torque. The torque module also determines a torque difference based on the first output torque and the second output torque. The damping control module generates a damping torque in a transmission based on the torque difference. | 12-23-2010 |