Patent application number | Description | Published |
20080208420 | Torque control arbitration in powertrain systems - A method of regulating a torque output of a vehicle powertrain includes generating a plurality of torque requests and associating each of the plurality of torque requests with one of a plurality of arbitration domains to form torque request sets associated with each of the plurality of arbitration domains. A first torque request set is arbitrated within a first of the plurality of arbitration domains to provide a first torque request. The first torque request is introduced into a second torque request set associated with a second of the plurality of arbitration domains. The second torque request set is arbitrated within the second arbitration domain to provide a second torque request. A torque source is regulated based on the second torque request. | 08-28-2008 |
20080234106 | ENGINE CONTROL FOR DISPLACEMENT ON DEMAND - An engine control system for controlling a displacement on demand engine having a plurality of cylinders includes a torque converter with a torque converter clutch. A control module determines a slip speed of said torque converter clutch, estimates a temperature state of said torque converter clutch based on said slip speed, and selectively activates at least one of said cylinders based on said temperature state. | 09-25-2008 |
20090043475 | CYLINDER PRESSURE SENSOR DIAGNOSTIC SYSTEM AND METHOD - A control module comprising a cylinder torque determination module that determines an indicated torque for a cylinder in an engine based on a pressure in the cylinder, a cylinder torque balancing module that determines a derivative term for the cylinder based on rotation of a crankshaft, and a cylinder pressure error detection module that detects a pressure error for the cylinder based on the indicated torque and the derivative term. A method comprising determining an indicated torque for a cylinder in an engine based on a pressure in the cylinder, determining a derivative term for the cylinder based on rotation of a crankshaft, and detecting a pressure error for the cylinder based on the indicated torque and the derivative term. | 02-12-2009 |
20090239707 | ACTIVE FUEL MANAGEMENT MODE TORQUE CONVERTER CLUTCH CONTROL - A system comprises a slip module and a gas temperature module. The slip module adjusts slipping of a clutch of a torque converter based on a first slip value before a cylinder of an engine is deactivated. The gas temperature module determines a temperature of a gas within the cylinder after the cylinder is deactivated. The slip module determines a second slip value based on the temperature of the gas and adjusts the slipping of the clutch based on the second slip value, wherein the second slip value is less than the first slip value. | 09-24-2009 |
20090276138 | TIME AND ANGLE BASED CYLINDER PRESSURE DATA COLLECTION - A control module for determining a time and angle based cylinder pressure includes a crankshaft position determination module that determines a first crankshaft position in an engine at a first time, a time-based cylinder pressure determination module that determines N time-based cylinder pressures in the engine at N times, wherein N is an integer greater than one, and an angle-based cylinder pressure determination module that determines an angle-based cylinder pressure at the first crankshaft position based on the first time, the N cylinder pressures, and the N times. | 11-05-2009 |
20100154526 | SOLENOID DIAGNOSTIC SYSTEMS FOR CYLINDER DEACTIVATION CONTROL - A solenoid diagnostic system includes a pressure monitoring module that determines a first pressure in an intake cam phaser for an intake camshaft and a second pressure in an exhaust cam phaser for an exhaust camshaft associated with a cylinder. A fuel injection monitoring module determines a fuel injection status associated with the cylinder. A fault determination module diagnoses a fault in a solenoid associated with the cylinder based on the first pressure, the second pressure, and the fuel injection status. | 06-24-2010 |
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 |
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 |
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 |
20100250089 | METHOD AND SYSTEM FOR GENERATING A DIAGNOSTIC SIGNAL OF AN ENGINE COMPONENT USING AN IN-CYLINDER PRESSURE SENSOR - A method and a control module for diagnosing an engine component function includes a comparison module comparing an in-cylinder pressure signal to a threshold and a fault indication module generating a diagnostic signal for an engine component in response to comparing. | 09-30-2010 |
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 |
20100282192 | METHOD AND SYSTEM FOR CONTROLLING A CAM PHASER - A method and control module includes a control hold duty cycle module generating a control hold duty cycle signal and a voltage correction module generating a voltage correction signal. The control module also includes a correction module generating a corrected proportional correction signal based on a proportional correction signal and the voltage correction signal, and generating a corrected integral correction signal based on an integral correction signal and the voltage correction signal. The control module also includes a force determination module controlling a duty cycle to a phaser operator based upon the control hold signal, the corrected proportional correction signal and the corrected integral correction signal. | 11-11-2010 |
20110083498 | IN-CYLINDER PRESSURE SENSOR DIAGNOSTIC SYSTEMS AND METHODS - A pressure sensor diagnostic system of the present disclosure includes an excitation module, a frequency determination module, and a fault determination module. The excitation module excites an in-cylinder pressure sensor and causes the in-cylinder pressure sensor to oscillate. The frequency determination module determines an oscillation frequency of the in-cylinder pressure sensor. The fault determination module diagnoses the in-cylinder pressure sensor based on the oscillation frequency. | 04-14-2011 |
20110106405 | METHOD AND SYSTEM FOR DETECTING OPERATING ERRORS IN A VARIABLE VALVE TIMING ENGINE - A method and control module includes a manifold absolute pressure comparison module that determines a function of the manifold absolute pressure and an average manifold absolute pressure for a plurality of cylinders and that compares the manifold absolute pressure parameter to a manifold absolute pressure threshold. The control module includes a misfire event module that compares the misfire parameter to a misfire threshold. A hardware remedy module performs a valve actuation hardware remedy in response to comparing the manifold absolute pressure and comparing the misfire parameter. | 05-05-2011 |
20110153181 | SYSTEMS AND METHODS FOR DIAGNOSING VALVE LIFT MECHANISMS AND OIL CONTROL VALVES OF CAMSHAFT LIFT SYSTEMS - A system for diagnosing a switchable roller finger follower (SRFF) and an oil control valve (OCV) includes a signal monitoring module and a fault detection module. The signal monitoring module receives at least one of an individual cylinder fuel correction (ICFC) signal and an air/fuel ratio imbalance (AFIM) signal when: an engine speed signal is within a predetermined range of speed; an engine load signal is within a predetermined range of load; and a charcoal canister vapor signal is within a predetermined range of flow rate. The fault detection module detects a fault of at least one of a SRFF and an OCV based on an exhaust gas recirculation value and at least one of the ICFC and AFIM signals. The ICFC and AFIM signals are generated based on: an engine position signal; and at least one of an oxygen signal and a wide range air fuel signal. | 06-23-2011 |
20110246044 | CYLINDER PRESSURE SENSOR RESET SYSTEMS AND METHODS - A system for a vehicle includes a cylinder pressure sensor and a control module. The cylinder pressure sensor measures pressure within a cylinder of an engine, generates increases in a cylinder pressure signal based on the pressure, selectively generates a predetermined profile in the cylinder pressure signal, and selectively resets the cylinder pressure signal to a predetermined reset level after generating the predetermined profile in the cylinder pressure signal. The control module receives the cylinder pressure signal, detects the predetermined profile of the cylinder pressure signal, and detects the resetting of the cylinder pressure signal to the predetermined reset level when the predetermined profile is detected. | 10-06-2011 |
20110290212 | SYSTEMS AND METHODS FOR IMPROVED ENGINE START-STOP RESPONSE - A control system for a vehicle that includes an engine includes an engine-stop module and a fuel control module. The engine-stop module determines whether to stop the engine based on at least one of input from a driver of the vehicle and vehicle operating parameters. The fuel control module stops the engine and controls a rate of engine speed decay by disabling fueling to cylinders of the engine according to a predetermined sequence. | 12-01-2011 |