Patent application number | Description | Published |
20090055072 | TURBO SPEED SENSOR DIAGNOSTIC FOR TURBOCHARGED ENGINES - A method of diagnosing operation of a turbo speed sensor that monitors a turbocharger in an internal combustion engine system includes determining whether the engine system is operating in one of a high speed and a low speed range and determining a threshold turbo speed value based on whether engine system is operating in one of the high speed and the low speed range. An actual turbo speed value of the turbocharger is monitored based on a signal generated by the turbo speed sensor. The actual turbo speed value is compared to the threshold turbo speed value and a diagnostic signal is generated based on the step of comparing. | 02-26-2009 |
20090288413 | EXHAUST GAS RECIRCULATION CONTROL SYSTEMS AND METHODS - An exhaust gas recirculation control system comprises a pressure condition evaluation module and a protection module. The pressure condition evaluation module evaluates at least one of vane movement of a turbocharger and engine pressure. The protection module selectively controls an exhaust gas recirculation valve based on the at least one of the vane movement of the turbocharger and the engine pressure. | 11-26-2009 |
20090314070 | TRANSITION FROM EXHAUST BRAKING TO EXHAUST PARTICULATE FILTER REGENERATION IN A DIESEL ENGINE - An intake throttle valve (ITV) position determination module generates a desired ITV position based on at least one of a desired airflow in a regeneration mode and an exhaust braking request in an exhaust braking mode. An ITV position limitation module generates a limited ITV position based on the desired ITV position. A transition module detects a transition from the exhaust braking mode to the regeneration mode, wherein an ITV is controlled to the limited ITV position after the transition is detected. | 12-24-2009 |
20100024418 | CONTROL SYSTEM AND METHOD FOR TRANSITIONING BETWEEN POSITION CONTROL AND FORCE CONTROL FOR MULTI-STAGE TURBO ENGINE TURBINE BYPASS VALVE - A control system comprising a current control module and a force control module. The current control module selectively supplies a current to a turbine bypass valve (TBV) to adjust the TBV to a predetermined position. The force control module selectively adjusts the current in response to a determination that an actual TBV position is less than a predetermined distance from the predetermined position. | 02-04-2010 |
20100082221 | THERMAL-PROTECTION BASED ENGINE PERFORMANCE ENHANCEMENT - An engine control module includes a power module and a turbine temperature module. The power module controls engine power output based on a turbine temperature. The turbine temperature module determines the turbine temperature based on a turbine inlet temperature. The power module decreases the engine power output when the turbine temperature is greater than or equal to a predetermined threshold temperature. | 04-01-2010 |
20100122691 | SOLENOID CURRENT CONTROL WITH DIRECT FORWARD PREDICTION AND ITERATIVE BACKWARD STATE ESTIMATION - An engine control system comprises a current control module and a solenoid actuator module. The current control module determines a duty cycle based on a desired current through a solenoid of an engine system and a resistance of the solenoid and corrects the resistance based on an actual current through the solenoid. The solenoid actuator module actuates the solenoid based on the duty cycle. | 05-20-2010 |
20110067396 | PRESSURE ESTIMATION SYSTEMS AND METHODS - An intake control system comprises an estimation module and a turbocharger control module. The estimation module receives one of a first pressure within an intake manifold measured by a manifold pressure sensor and a second pressure measured by a pressure sensor at a location between a compressed air charge cooler and a throttle valve. The estimation module estimates the other one of the first and second pressures based on the received one of the first and second pressures. The turbocharger control module controls output of a turbocharger based on the estimate of the other one of the first and second pressures. | 03-24-2011 |
20110197580 | SYSTEM AND METHOD FOR ESTIMATING AIRFLOW RESTRICTION OF AN ENGINE AIR FILTER - A control system for an engine that includes a turbocharger includes a restriction estimation module and an engine protection module. The restriction estimation module estimates restriction of airflow through an air filter of the engine based on a comparison between measured and modeled temperatures at an outlet of a compressor of the turbocharger. The engine protection module, based on the estimated airflow restriction, at least one of controls turbocharger boost, controls turbocharger airflow, controls a fueling rate of the engine, and generates a warning signal for a driver of a vehicle. | 08-18-2011 |
20130047604 | INTERNAL COMBUSTION ENGINE AND METHOD FOR OPERATING INTERNAL COMBUSTION ENGINE - In one exemplary embodiment of the invention, an internal combustion engine includes a turbocharger configured to receive an air flow and a first exhaust flow from the internal combustion engine and a supercharger downstream of the turbocharger configured to receive a compressed air charge from the turbocharger. The engine further includes an exhaust gas recirculation circuit receiving a second exhaust flow from the internal combustion engine and supplying the second exhaust flow to the compressed air charge upstream of the supercharger, wherein the second exhaust flow and compressed air charge comprise an exhaust-air mixed flow received by the internal combustion engine. | 02-28-2013 |
20130174545 | CONTROL SYSTEMS AND METHODS FOR SUPER TURBO-CHARGED ENGINES - A method of controlling airflow of an engine system is provided. The method includes determining a supercharger operating mode and a turbocharger operating mode based on engine load; selectively generating a control signal to a turbocharger based on the turbocharger operating mode; and selectively generating a control signal to a supercharger bypass valve based on the supercharger operating mode. | 07-11-2013 |
20130269654 | METHOD OF CONTROLLING A DIESEL ENGINE - A method of controlling a diesel engine includes sensing a speed of the diesel engine, and closing a throttle of the diesel engine when the sensed speed of the diesel engine is equal to or greater than a maximum allowable engine speed to prevent oxygen from entering an intake manifold of the diesel engine, thereby preventing combustion and stopping the operation of the diesel engine. An Exhaust Gas Recirculation (EGR) valve is actuated to regulate circulation of exhaust gas from the diesel engine through the intake manifold to control pressure within the intake manifold to prevent damage to other engine components from excessive positive or negative pressure. | 10-17-2013 |
20130276443 | SYSTEM AND METHOD FOR CONTROLLING AN EXHAUST-BRAKING ENGINE MANEUVER - A method for controlling an exhaust-braking engine maneuver includes driving a compressor by a turbine so that the compressor receives and compresses an intake stream of fluid to produce a stream of compressed fluid. The method also includes receiving a stream of engine working fluid that includes the stream of compressed fluid, and discharging, to an exhaust system, an exhaust stream comprising the stream of engine working fluid. A stream of scavenged exhaust fluid comprising at least a portion of the exhaust stream is received, and work is extracted from the stream of scavenged exhaust fluid by the turbine to drive the compressor. The variable turbine nozzle and an intake throttle valve are modulated so as to satisfy one or more turbine control criterion and one or more compressor control criterion. | 10-24-2013 |
20140278012 | SYSTEM AND METHOD FOR SAMPLING AND PROCESSING MASS AIR FLOW SENSOR DATA - A vehicle includes an engine having cylinders in fluid communication with an intake air flow, a mass air flow (MAF) sensor positioned with respect to the intake air flow which outputs a pulse train signal describing the frequency of the intake air flow, and a controller. The controller includes a calibrated non-linear conversion curve recorded in memory. The controller executes a method to convert the frequency data into a corresponding mass air flow using the calibrated non-linear conversion curve, determines the instantaneous mass air flow value at each leading or trailing edge of the pulse train signal, and accumulates the instantaneous mass air flow values over a calibrated duration. A time-weighted average of the accumulated mass air flow values is then used to execute a control action. The controller includes a host computer device and memory storing the curve and instructions for executing the method. | 09-18-2014 |
20150068295 | OXIDATION CATALYST/HYDROCARBON INJECTOR TESTING SYSTEM - An oxidation catalyst (OC)/hydrocarbon injector (HCI) testing system includes a controller having a first oxygen sensor input configured and disposed to receive a first oxygen sensor value upstream of an oxidation catalyst (OC) device and a second oxygen sensor input configured to receive a second oxygen sensor value downstream of the OC device. The controller is configured and disposed to perform a first test to detect one of a faulty OC device and a faulty HCI based on a difference between the first and second oxygen sensor values. | 03-12-2015 |