Assignee: GM GLOBAL TECHNOLOGY OPERATIONS, INC.

Location: Not specified.
No. of patents: 150

Number	Title	Issue Date
7975534	Crankshaft reversal detection systems A crankshaft reversal detection system includes a sensor module and a control module that communicates with the sensor module. The sensor module detects position of a belt tensioner that communicates with a crankshaft driven accessory drive belt. The control module ...	07/12/2011
7931727	Microwave mode shifting antenna system for regenerating particulate filters A regeneration system comprises a particulate matter (PM) filter including a microwave energy absorbing surface, and an antenna system comprising N antennas and an antenna driver module that sequentially drives the antenna system in a plurality of transverse modes o...	04/26/2011
7931715	DPF heater attachment mechanisms An exhaust filter system includes a particulate filter (PF) that is disposed downstream from an engine. The PF filters particulates within an exhaust from the engine. A heating element heats particulate matter in the PF. A fastener limits expansion movement of the h...	04/26/2011
7921705	Engine coolant temperature estimation system An engine coolant temperature estimation system comprises a coolant temperature estimation module and a coolant monitoring module. The coolant estimation module estimates an engine coolant temperature based on at least one of a mass air flow, a vehicle speed, and an...	04/12/2011
7912617	Air purge method for a rotating clutch A method for controlling trapped air in a clutch of an automatic clutch-to-clutch transmission includes, calculating a pulse on time based on a clutch volume and adaptive convergence. A pulse off time is calculated based on a temperature of transmission fluid. A pul...	03/22/2011
7904233	Fuel injection measurement and diagnostics A system and method comprises operating an engine during a first cycle to drive a piston in a cylinder without energizing a fuel injector of the cylinder; acquiring first pressure data of the cylinder for a predetermined crank angle window during the first cycle; en...	03/08/2011
7901475	Diesel particulate filter with zoned resistive heater A diesel particulate filter assembly comprises a diesel particulate filter (DPF) and a heater assembly. The DPF filters a particulate from exhaust produced by an engine. The heater assembly has a first metallic layer that is applied to the DPF, a resistive layer tha...	03/08/2011
7900615	Air-fuel imbalance detection based on zero-phase filtering A control system comprising an oxygen sensor that generates an oxygen signal based on an oxygen concentration level in an exhaust gas of an engine, a filtering module that determines a filtered signal based on the oxygen signal, and an air-fuel imbalance detection m...	03/08/2011
7900606	Systems and methods for purging air of a fuel injection system A system for a vehicle includes an initialization module and a purge control module. The initialization module generates an initialization signal based on a crankshaft speed signal and/or a fuel rail pressure signal. The initialization module also generates the init...	03/08/2011
7900601	Injection advancement for piston cooling in spark ignition direct injection engines An engine system comprises a temperature determination module, a temperature comparison module, and a fuel injection control module. The temperature determination module determines an engine temperature. The temperature comparison module compares the engine temperat...	03/08/2011
7900439	Exhaust system monitoring methods and systems A diagnostic system for an exhaust system including a catalyst and a post-catalyst oxygen sensor is provided. The system generally includes a fuel control module that commands fuel to transition from a rich condition to a lean condition and that commands fuel to tra...	03/08/2011
7899600	Torque converter clutch control system A control system is provided. The control system includes a timer module that receives a first torque converter clutch (TCC) apply request and estimates at least one of a message latency time and a hydraulic latency time. A control module receives a subsequent TCC a...	03/01/2011
7894978	Diagnostic system and method for detecting tampering of vehicle software or calibrations A tamper detection system for a control module of a vehicle comprises first nonvolatile memory that stores N rewriteable components including at least one of calibration and software that is used to operate a controlled device of the vehicle, wherein N is an integer...	02/22/2011
7894968	Accelerator/brake pedal management for torque-based engine control A method and system for regulating a drive torque provided to a driveline of a vehicle includes monitoring an accelerator pedal position and a brake pedal position. An adjusted accelerator pedal position is determined based on the accelerator pedal position and the ...	02/22/2011
7891168	Flexible fuel tolerant catalytic converter diagnostic method A monitoring system for a catalytic converter is provided. The system includes: a fuel determination module that determines a fuel composition based on a sensed composition of fuel in a fuel system; a fuel/air (F/A) determination module that selectively determines a...	02/22/2011
7886585	Intake air temperature sensor diagnostic systems with adaptive learning modules A diagnostic system for an internal combustion engine includes an intake air temperature (IAT) determination module, a reference temperature determination module, and an adaptive learning module. The IAT determination modules determines a first IAT using an IAT sens...	02/15/2011
7886529	Electrically heated DPF/SCR 2-way system An exhaust system may include a canister that is disposed downstream from an engine. A particulate filter (PF) is disposed within the canister and filters particulates within an exhaust from the engine. A reducing catalyst is disposed within the canister, is on the ...	02/15/2011
7886527	Reductant injection control strategy A base dose module generates a base dose signal that corresponds to a mass flow rate of a dosing agent. A dose adjustment module receives an ammonia (NH3) signal and determines a first dose adjustment based upon the NH3 signal. The NH3 signal indicates NH3 measured ...	02/15/2011
7885748	Virtual accelerometer A vehicle control system for regulating operation of a vehicle having a transmission includes a first module that processes an output shaft signal which is based on rotation of an output shaft of the transmission through a third order Kalman filter to determine an a...	02/08/2011
7885746	System architecture optimization for electronic transmission range selection A transmission control system for a vehicle includes a first module that generates a first modified signal based on a first position of a driver input device and a second module that receives the first modified signal from the first module. The second module generat...	02/08/2011
7882702	Control system to minimize white smoke using variable nozzle turbo An engine system and method for operating an internal combustion engine includes a turbocharger that generates a boost to the engine. A coolant temperature of the engine is determined along with other based engine inputs and calculated values. A normal boost based o...	02/08/2011
7881859	Torque converter clutch control system and post oxygen sensor performance diagnostic system A system comprises a post oxygen performance diagnostic (POPD) module that performs a POPD of a post oxygen sensor, wherein the POPD includes a deceleration fuel cutoff (DFCO) portion. A torque converter control module adjusts operation of a torque converter clutch ...	02/01/2011
7881846	Driveline clunk detection and control A driveline clunk control system for a vehicle having an engine that drives a driveline through a transmission includes a transmission output shaft speed (TOSS) sensor that generates a TOSS signal and a first module that receives the TOSS signal and that determines ...	02/01/2011
7848874	Control system and method for starting an engine with port fuel injection and a variable pressure fuel system A fuel control system includes a pressure comparison module that generates a pressure control signal when a fuel supply pressure is greater than a predetermined pressure value, a temperature comparison module that generates a temperature control signal when a temper...	12/07/2010
7845319	Valvetrain control systems with independent intake and exhaust lift control A valve control system for an internal combustion engine includes a valve actuation system. The valve actuation system includes at least one of first and second configurations. The first configuration includes a shared lift control valve that actuates an intake valv...	12/07/2010
7878175	Torque reserve and emission control system for coordinated torque control A coordinated torque control system includes a catalyst module that generates a multi-mode enable signal based on a catalyst light off enable signal. A torque reserve module generates a torque reserve signal based on the multi-mode enable signal, an engine speed sig...	02/01/2011
7878057	System for detecting failures in fuel systems A diagnostic system and method includes a fuel level sensor that senses a fuel level in a fuel tank and a sensor diagnostic module that monitors a fuel transfer mechanism for a time period, that calculates a change in the fuel level, and that evaluates operation of ...	02/01/2011
7878053	Engine off brake booster leak diagnostic systems and methods A control system for evaluating a brake booster system is provided. The control system includes an engine evaluation module that detects an engine off condition. A pressure evaluation module monitors hydraulic brake line pressure and detects changes in brake booster...	02/01/2011
7877987	Electrically heated particulate filter regeneration using hydrocarbon adsorbents An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine. A grid of electrically...	02/01/2011
7874406	Thermal simulation friction device cooling control A cooling system for cooling a friction device includes a flow control device which controls a flow of fluid through the friction device. A controller estimates a temperature state of the friction device and calculates a flow command based on the temperature state. ...	01/25/2011
7873464	Block heater usage detection and coolant temperature adjustment A control system for an engine includes a block heater determination module, an adjustment module, and an engine control module. The block heater determination module generates a block heater usage signal based on ambient temperature, measured engine coolant tempera...	01/18/2011
7873461	Fuel temperature estimation in a spark ignited direct injection engine A fuel control system that includes a fuel injector control module that selectively applies a power source to a coil of a fuel injector. The fuel control system also includes a current determination module that selectively measures current flowing through the coil. ...	01/18/2011
7870843	Torque control system with scavenging An engine control system includes a scavenging module that generates a scavenging signal when both a driver torque request is greater than a predetermined torque threshold and a rotational speed of an engine crankshaft is less than a predetermined speed threshold. A...	01/18/2011
7862635	Shielded regeneration heating element for a particulate filter An exhaust system includes a particulate filter (PF) that is disposed downstream from an engine. The PF filters particulates within an exhaust from the engine. A heating element heats particulate matter in the PF. A catalyst substrate or a flow converter is disposed...	01/04/2011
7862471	Valve control system A solenoid control system for implementation with an electronic range selection (ETRS) system that shifts a transmission range between a park position and an out-of-park position. A first solenoid assembly is operable to control a fluid valve to supply pressurized f...	01/04/2011
7858252	Active control strategy for PEM fuel cell liquid water evacuation The present invention provides a fuel cell stack and a method of operating the same that allows for removal of liquid water and minimizes the impact of liquid water on the performance of the fuel cells. By selectively blocking the cathode reactant flow from exiting ...	12/28/2010
7858052	Catalytic converter optimization A catalytic converter includes an inlet. A first sub-section of substrate is located a first distance from the inlet that includes a first catalyst coating having a first density. A second sub-section of substrate is located a second distance from the inlet that inc...	12/28/2010
7856867	Injector control performance diagnostic systems A diagnostic system for a fuel injector control system according to the present disclosure includes a plurality of state monitoring modules and a fault determination module. The plurality of state monitoring module monitor a plurality of states of a driver circuit f...	12/28/2010
7856309	Cold start emission reduction strategy for coordinated torque control systems A cold-start control system for an internal combustion engine includes a heat estimation module, a torque request module and a propulsion torque determination module. The heat estimation module determines an exhaust system temperature and estimates heat required to ...	12/21/2010
7856304	Engine torque control A method of achieving a desired torque output of an internal combustion engine includes determining a first air-per-cylinder (APC) value based on a first APC relationship and determining a second APC value based on a second APC relationship. An APC error is determin...	12/21/2010

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Assignee: GM GLOBAL TECHNOLOGY OPERATIONS, INC.