Abstract: A secondary controller for controlling the performance of a moving automobile is described. The secondary controller can be configured to communicate with one or more vehicle controllers, such as the engine control unit, while the automobile is being driven. The secondary controller can send control commands, such as self-test or diagnostic commands to the vehicle controller to effect the operation of the vehicle's power train. The secondary controller can receive power train related data from the engine control unit and based upon the received power train data determine when to send the control commands. In one embodiment, the secondary controller communicates with the vehicle controller via the vehicle's diagnostic port, such as an OBD-II port. In another embodiment, the secondary controller can be configured to control a variable displacement engine in a vehicle to improve the fuel efficiency of the vehicle while it is driven.

Abstract: An apparatus for controlling a motor determines whether or not to control the motor in order to control the variable valve lift device by using a measurement value of a valve lift and a target value of the valve lift, compares a predetermined base voltage range with a battery voltage in order to control the motor, determines a voltage factor corresponding to the battery voltage when the battery voltage is included in the base voltage range; and determines a driving signal value for the motor by applying the voltage factor to a predetermined base signal value.

Abstract: A pre-ignition estimation/control device includes: an octane number estimation module for estimating an octane number of a fuel based on detection signals received from an intake air temperature sensor, a water temperature sensor, etc; a pre-ignition-occurrence-index calculation module for calculating a pre-ignition occurrence index based on the estimated octane number and the like; a pre-ignition-occurrence-index correction module for correcting the pre-ignition occurrence index so as to cause the pre-ignition more likely to occur; an effective-compression-ratio-boundary calculation module for calculating a boundary of an effective compression ratio based on the pre-ignition occurrence index; an intake-cam-phase-advance calculation module for calculating a phase advance of an intake cam based on the boundary of the effective compression ratio and the like; and an intake-cam-phase control module for controlling an intake-cam variable phasing system based on the phase advance of the intake cam, to thereby rest

Abstract: A two-wheeled vehicle is provided including a frame, front and rear ground-engaging members each supporting the frame, a straddle-type seat, a handlebar for steering the vehicle, at least one light device configured to operate in a hazard mode, an engine supported by the frame and operably coupled to the ground-engaging members, a tilt sensor, and a vehicle control unit in communication with the tilt sensor. The vehicle control unit is operative to detect a tilt angle of the vehicle based on output from the tilt sensor. The vehicle control unit is operative to determine a tip-over condition of the vehicle based on the detected tilt angle exceeding a threshold tilt angle. The vehicle control unit activates the hazard mode of the at least one light in response to the determination of the tip-over condition.

Abstract: A laser spark plug, in particular for an internal combustion engine, includes a prechamber for accommodating an ignitable medium and means for applying laser radiation to an ignition point situated in the prechamber. The means are fashioned such that the laser radiation is focused onto at least one ignition point that, given a division of the prechamber into three partial regions that are approximately equal in volume and that extend axially away from an end face of the laser spark plug adjoining the prechamber and are separated from one another by imaginary planes situated essentially parallel to the end face, is situated in the partial region adjoining the end face or in a central partial region adjacent to said partial region, preferably in the partial region adjoining the end face.

Abstract: A system includes a mode module and an energy module. The mode module generates a mode signal based on a temperature of an engine and at least one of a deceleration signal and a regenerative braking signal. The energy module, based on the mode signal, increases cooling of a coolant of the engine during at least one of a deceleration event of a vehicle and a regenerative braking event. The energy module, while increasing the cooling of the coolant, supplies an overvoltage to a cooling pump of the engine.

Abstract: An adaptive engine speed control system includes an idle condition module that determines whether the engine is idling and determines whether an actual engine speed is different than a desired engine speed. The desired engine speed corresponds to a commanded engine speed. A torque reserve determination module adjusts at least one of a torque reserve and the desired engine speed based on the determination of whether the engine is idling and the determination that the actual engine speed differs from the desired engine speed. The torque reserve corresponds to a quantity of torque reserved to respond to an anticipated future load on the engine.

Abstract: The invention relates to a method for operating a drive device (1), which for the purpose of providing a driving torque comprises an internal combustion engine having a plurality of cylinders (10, 11, 12, 13) that, during normal operation, supply a respective torque contribution, and at least one electric motor (3) operatively connected to said engine. To this end, in a diagnostic mode a cylinder-selective measurement of at least one characteristic operating variable is carried out, for which purpose in the diagnostic mode only the cylinder (10, 11, 12, 13) to be measured is operated and the torque contributions of the remaining cylinders (10, 11, 12, 13) are simulated by the electric motor (3).

Abstract: Methods and systems are provided for identifying and indicating degradation of an engine cylinder spark plug. In response to a cylinder misfire event during selected engine operating conditions, followed by an occurrence of a threshold number and/or rate of pre-ignition events in the same cylinder, a controller may determine that the spark plug is degraded. The controller may limit combustion in the cylinder in response to the degradation. Additionally, cylinder pre-ignition mitigating steps may be taken.

Abstract: A method for actuating an electric fan motor for an internal combustion engine of a motor vehicle, comprising the steps:—determining an operating duration during which the fan motor is operated below a rotational speed which is critical with regard to pasting;—wherein if the operating duration exceeds a duration which is critical with regard to pasting, the fan motor is operated for a defined time duration at a washing rotational speed which is higher than the rotational speed which is critical with regard to pasting.

Abstract: A method for computing indicated mean effective pressure (IMEP) in an internal combustion engine using sparse input data. The method uses an indirect integration approach, and requires significantly lower resolution crankshaft position and cylinder pressure input data than existing IMEP computation methods, while providing calculated IMEP output results which are very accurate in comparison to values computed by existing methods. By using sparse input data, the indirect integration method offers cost reduction opportunities for a manufacturer of vehicles, engines, and/or electronic control units, through the use of lower cost sensors and the consumption of less computing resources for data processing and storage.

Abstract: An output control device of a vehicle is provided. A flow speed ratio calculator obtains a flow speed ratio which is a ratio between a flow speed of an intake air of the internal combustion engine realizing a current base request torque which is currently calculated and a flow speed of the intake air of the internal combustion engine realizing a previous request torque which is previously calculated. A base request torque corrector corrects the base request torque based on the flow speed ratio. A controller controls a driving parameter of the internal combustion engine according to the current request torque which is currently calculated based on the current base request torque corrected by the base request torque corrector.

Abstract: A method of modeling and testing the effectiveness of an EGR cooler. The cooler effectiveness is mathematically modeled as a function of various temperatures and over an operation history that includes one or more engine shut-downs.

Abstract: Predetermined torque characteristics are obtained by multiplying by a predetermined ratio that is less than 100%, the upper value of engine output torque from the engine output torque line, for at least part of the range of engine rotation speed. Torque upper value information defines the upper value of engine output torque that changes in conformance with vehicle speed and tractive farce. When predetermined conditions for determination are satisfied, an engine output torque control part controls engine output torque based on torque upper value information. The predetermined conditions for determination at the least include that a travel condition is forward travel, that a work condition is laden condition and that a raise operation is being performed by the working machine. When the predetermined conditions for determination are not satisfied the engine output torque control part controls engine output torque based on predetermined torque characteristics.

Abstract: In a first illustrative embodiment, a processor operably programmed and configured to receive input defining one or more vehicle parameters to monitor and control during a vehicle rental. The processor may monitor and control the vehicle parameters during a vehicle rental period starting when an authorized user keylessly activates a vehicle during a defined start time. The processor may control driver behavior by limiting vehicle performance based on a predefined threshold of one or more vehicle parameters. The monitoring and control may continue until the rental period has expired or when the vehicle is returned to a predetermined geographic area designated by the vehicle owner. The processor may initiate wireless communication of the vehicle parameters to a vehicle rental administrative system through a cellular telephone located in proximity to the vehicle.

Abstract: A method for launching a vehicle is disclosed. The method comprises, during operation with an idle engine speed prior to a pedal tip-in, increasing alternator and boost pressure while maintaining the idle engine speed, and decreasing alternator load responsive to the pedal tip-in. In this way, increased turbocharger output may be used to quickly accelerate the vehicle.

Abstract: A secondary controller for controlling the performance of a moving automobile is described. The secondary controller can be configured to communicate with one or more vehicle controllers, such as the engine control unit, while the automobile is being driven. The secondary controller can send control commands to the vehicle controller to effect the operation of the vehicle's power train. The secondary controller can receive power train related data from the engine control unit and based upon the received power train data determine when to send the control commands. In one embodiment, the secondary controller communicates with the vehicle controller via the vehicle's diagnostic port, such as an OBD-II port. In another embodiment, the secondary controller can be configured to control the operational displacement of a variable displacement engine while the vehicle is driven.

Abstract: A boost power supply may be constructed of a number of smaller switching power supplies, each switching power supply providing a respective portion of a combined output current provided by the boost power supply to a load. A different respective control signal may be provided to each switching power supply to regulate the respective portion of the combined output current provided by the switching power supply. Each different respective control signal may be provided to the corresponding switching power supply out of phase with respect to each other different respective control signal to prevent the combined output current from exceeding a specified threshold current value.

Abstract: A vehicle method for barometric pressure identification, including adjusting engine operation responsive to barometric pressure, the barometric pressure based on a pressure change at a sector of the fuel system when the sector is sealed with the vehicle travelling. The method may utilize a pressure change at the sealed sector of the fuel system, such as a sealed fuel tank, to identify barometric pressure, even with the engine off for extended durations of vehicle travel. As such, in a hybrid-vehicle application, including during hill descents in which the engine is maintained off, barometric pressure can still be updated.

Abstract: A diagnostic system for a vehicle is disclosed. A first difference module generates a first difference based on a first pressure measured at a first secondary air injection (SAI) valve and a previous value of the first pressure. A first summer module generates a first accumulated difference based on a sum of values of the first difference generated during a predetermined period. A second difference module generates a second difference based on a second pressure measured at a second SAI valve and a previous value of the second pressure. A second summer module generates a second accumulated difference based on a sum of values of the second difference generated during the predetermined period. A fault indication module selectively indicates that a fault is present downstream of one of the first and second SAI valves based on the first and second accumulated differences.

Abstract: A vehicle has an engine, a fuel tank, and a controller configured to selectively operate the engine, during one or more drive cycles, until a specified fraction of fuel from the tank has been consumed in response to expiration of a predefined time period to limit fuel degradation. A powertrain system has a traction battery, an engine, a fuel tank, and a controller configured to selectively operate the engine in response to a quality of fuel in the tank being below a threshold until a specified fraction of fuel has been consumed, thereby limiting fuel degradation. A method of controlling a vehicle includes, in response to expiration of a predefined time period, selectively operating an engine, during one or more vehicle drive cycles, such that state of charge of a traction battery is generally maintained until a specified fraction of fuel in a fuel tank has been consumed to limit degradation of the fuel.

Abstract: A vehicle is equipped with an auxiliary that is driven by the output of an internal combustion engine and which is capable of obtaining drive force by transmitting the output of the internal combustion engine to driving wheels. If an air conditioning compressor is being driven during engine idling of the internal combustion engine, an electronic control apparatus implements output-increase control for increasing the output of the internal combustion engine in comparison to when the air conditioning compressor is not being driven. If the force applied to the accelerator pedal (Pac) is equal to or more than a prescribed value (Pth), output-reduction control for reducing the output of the internal combustion engine by initiating engine idling of the internal combustion engine, and prohibiting the drive of the air conditioning compressor, is implemented.

Abstract: Embodiments for monitoring fuel system degradation are provided. In one example, a method for a vehicle comprises evacuating fuel from a first fuel tank to a second fuel tank, and indicating fuel system degradation in response to a change in fuel system pressure following the evacuation of fuel. In this way, fuel system degradation may be indicated without use of a separate pressure building device.

Abstract: A closed-loop system having a controllable variable is monitored to detect the off-nominal behavior and raise an alert when fault is detected. The faults show up in such a way that the tracking error signal is impacted and this impact manifests itself as a change in the frequency components. A filter isolates a band of frequency components of the tracking error signal that are more impacted than others by deviation caused by a fault to be detected. The filter can effectively amplify the section of the error tracking signal that contains the frequency components having impact. In addition, the filter will also have the characteristics to attenuate the impact of other frequency components. An accumulated error signal is generated from the filtered tracking error signal, compared with a predetermined fault threshold characteristic, and a fault alert is provided if a predetermined threshold is satisfied.

Abstract: An idle stop vehicle performs an idle stop to automatically stop an engine during a stop of the vehicle. The vehicle includes an idle stop condition determination unit for determining whether or not an idle stop condition holds, and an engine control unit for performing the idle stop when the idle stop condition holds before a stoppage time exceeds a specified time and prohibiting the idle stop after the stoppage time exceeds the specified time without the idle stop condition holding.

Abstract: A method for computing indicated mean effective pressure (IMEP) in an internal combustion engine using sparse input data. The method uses a cubic spline integration approach, and requires significantly lower resolution crankshaft position and cylinder pressure input data than existing IMEP computation methods, while providing calculated IMEP output results which are very accurate in comparison to values computed by existing methods. By using sparse input data, the cubic spline integration method offers cost reduction opportunities for a manufacturer of vehicles, engines, and/or electronic control units, through the use of lower cost sensors and the consumption of less computing resources for data processing and storage.

Abstract: A system and method is provided for using load data to control a feature in a model vehicle. In one embodiment of the present invention, a model vehicle includes a controller in communication with a remote control, a motor module, a smoke module, a sound module, and a memory device. While the model vehicle is operated under test conditions, calibration data is collected and stored in the memory device. While the model vehicle is operated under normal conditions, the controller receives a speed step instruction from the remote control and instructs the motor module to operate the motor at a corresponding speed. The data used to propel the model vehicle at the corresponding speed it then provided to the controller, where it is compared to the calibration data to identify a delta therebetween. The delta is then used by the controller to control, for example, the smoke and sound modules.

Abstract: Methods and systems are provided for purging condensate from a charge air cooler to an engine intake. During an engine deceleration event, airflow through a charge air cooler is temporarily increased to purge stored condensate to the engine intake. By delivering condensate while an engine is not fueled, misfire events resulting from ingestion of water are reduced.

Abstract: A method for operating a hybrid drive train involves operating an internal combustion engine using a low-NOx operating method in a range of low and average rotational speeds and/or loads, and operating the internal combustion engine using a spark ignition operating method in a range of higher rotational speeds and/or loads.

Abstract: The timing of a controlled event is advanced or retarded in an IC engine by emulating the engine speed and position signal pattern prior to transmission of that signal pattern to an output such as a fuel injector. In a multi-controller engine in which a second controller is controlled at least in part by signals delivered by first controller, the signal preferably is emulated in the first controller prior to transmission to the second engine controller in order to allow the shifting of a timing of a controlled event without direct data transfer from the second controller to the first controller. The technique is particularly well-suited for controlling diesel fuel injection in a dual fuel or other multi-fuel engine. In this case, the first controller must be a dual fuel controller and the second controller may be a diesel controller.

Abstract: An engine control apparatus which may be employed in automotive vehicles. The engine control apparatus is equipped with a controlled variable arithmetic expression which defines correlations between a plurality of combustion parameters and a plurality of controlled variables of actuators for control of an operation of the engine to calculate a combination of command values to be outputted to the actuators for regulating the controlled variables needed to achieve target values of the combustion parameters. When one of the command values is produced outside an allowable operation range of a corresponding one of the actuators, the engine control apparatus corrects or limits the one of the command values to an upper or a lower limit of the allowable operation range, thereby ensuring the stability in bringing engine output characteristics close to desired values.

Abstract: A driving force control device for controlling engine torque generated by an internal combustion engine mounted on a vehicle and the engine revolution speed of the internal combustion engine based on the operation amount of driving force request operation on the vehicle to control the driving force of the vehicle is characterized by executing revolution fluctuation suppression control that suppresses fluctuations in engine revolution speeds when the operating point of the internal combustion engine in accordance with the engine torque and the engine revolution speed is within an optimum fuel economy range being a region set with a specified hysteresis width relative to an optimum fuel economy line of the internal combustion engine; accordingly, it is possible to improve the efficiency of the whole driving system.

Abstract: The present invention relates to a control device for a spark-ignition internal combustion engine provided with a cylinder pressure sensor and aims to facilitate optimal control of a combustion state even in a situation where an operating condition is variable. A predetermined combustion-related parameter whose value is uniquely determined by behavior of a change in cylinder pressure relative to a crank angle is used as a control value. Ignition timing is calculated based on the control value in accordance with a calculation rule determined according to a current or target operating condition of the internal combustion engine. The control value resulting from calculation based on a target value of a predetermined physical quantity relating to torque of the internal combustion engine in accordance with a predetermined calculation rule is used as a base value and is corrected by feeding back an output value of the cylinder pressure sensor.

Abstract: Is provided herein a torque-limiting electronically controlled CVT comprising a drive portion having a drive pulley including two opposed sheaves adapted to be actuated with an electric motor to set a transmission ratio between an engine and a ground contacting rotating member of a vehicle, an input module adapted to receive a signal indicative of whether a ground-contacting rotating member is airborne, a processing module adapted to determine a desired CVT ratio, and an output module adapted to actuate the electric motor to obtain the desired CVT ratio to match the circumferential velocity of the vehicle's airborne ground-contacting rotating member with the speed of the vehicle in order to limit a mechanical peak torque sustained by a drive system of the vehicle. Also provided hereby is a vehicle equipped with the CVT, a kit including such a CVT and a method of managing the CVT to limit the mechanical peak torque sustained by a drive train of a vehicle.

Abstract: 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.

Abstract: A method controls a supercharged internal-combustion engine and comprises steps of: establishing predetermined lower-limit and higher-limit speeds (PLLS, PHLS) of a turbocharger; calculating a reduced lower-limit speed (RLLS) according to the PLLS and an absolute temperature upstream of a compressor; calculating a reduced higher-limit speed (RHLS), according to the PHLS and temperature, higher than the RLLS; determining an “over-speed” interval (OSI) between the RRLS and RHLS; calculating a current reduced-limit speed (CRLS); controlling the turbocharger to bring the CRLS back to no greater than the RLLS every time the CRLS is detected and within the OSI; establishing in a preliminary adjustment and set-up phase a threshold value; and controlling the turbocharger to bring the CRLS back to no greater than the RLLS after a time interval, which is equal to the threshold value, has elapsed from a moment in which the CRLS is detected and within the OSI.

Abstract: A method is provided for sensing the position of a camshaft in an internal combustion engine having a camshaft phaser for controllably varying the phase relationship between a crankshaft of the internal combustion engine and the camshaft, the camshaft phaser being actuated by an electric motor and having a gear reduction mechanism with a predetermined gear reduction ratio and a sensor for determining the rotational position of the electric motor. The method includes generating a rotational position signal indicative of the rotational position of the electric motor by using the sensor to determine the rotational position of the electric motor and calculating the position of the camshaft based on the rotational position signal and the gear reduction ratio of the gear reduction mechanism.

Abstract: An apparatus includes an operating conditions module that interprets a number of compressor operating parameters; a compressor flow module that determines a compressor inlet flow in response to the number of compressor operating parameters; and a fresh air flow module that provides a fresh air flow value in response to the compressor inlet flow. The operating conditions module further interprets a current mass air flow value, and the apparatus further includes a mass air flow sensor trimming module that adjusts a mass air flow sensor drift value in response to the current mass air flow value and the fresh air flow value. The apparatus includes a diagnostics module that determines a mass air flow sensor is failed in response to the current mass air flow value and the fresh air flow value.

Abstract: A system and method is provided for the use of the ion current signal characteristics for onboard cycle-by-cycle, cylinder-by-cylinder measurement, for example soot measurement, load measurement such as indicated or brake mean effective pressure, or fuel consumption measurement in an internal combustion engine. The system may acquire an ion current signal, measures one or more of soot, load, fuel consumption and may control the engine operating parameters accordingly.

Abstract: An agricultural working system includes a self-propelled agricultural working machine equipped with an attachment in the form of a soil-management device such as a plow, a cultivator, or a harrow, a drive unit that acts as a drive train on land wheels, a control arrangement and a user interface and display unit associated with the control arrangement (5). The control arrangement ascertains the torque loads that occur during the working operation for at least one drive-train component, for example, drive shafts of the land wheels and provides at least one control function on the basis of the ascertained torque loads.

Abstract: A diagnostic device for ascertaining an effect of an additive addition on a motor vehicle drive train, having a control device to control an internal combustion engine thereof during the additive addition, based on a control unit parameter(s); a detection device to detect at least one process parameter of the additive addition and at least one operating parameter of the drive train during the additive addition; a comparison device coupled to the detection device to compare the at least one detected process parameter and the at least one detected operating parameter to parameter values stored in a memory device and based thereon to ascertain at least one comparison result; and an evaluation device, coupled to the comparison and control devices, to ascertain the effect of the additive addition on the drive train based on the at least one ascertained comparison result and the at least one control unit parameter.

Abstract: A control system for a machine may include a processor configured to communicate with a power source. The processor may also be configured to communicate with a transmission assembly. The processor may be configured to determine whether the power source is in a potential stall condition based at least in part on an actual speed of the power source and a requested speed of the power source. If the power source is in the potential stall condition, the processor may be configured to request that fuel be supplied to the power source although the fuel is not currently required by the power source, in anticipation of an increase in load on the machine.

Abstract: A hybrid vehicle battery life evaluating apparatus 1 includes an actual traveling measuring section 2 measuring, for each driving pattern, actual gasoline mileage data on a hybrid vehicle equipped with a battery as a power source, a test traveling storage section 3a storing test gasoline mileage data set for each driving pattern on the basis of a traveling test on the vehicle, a battery life evaluating section 5 comparing the measured actual gasoline mileage data with the test gasoline mileage data on the corresponding driving pattern to evaluate a degradation level of the battery on the basis of a value of a decrease in gasoline mileage set for each degradation level of the battery and transmitting information on battery degradation to a battery life display section 6, and the battery life display section 6 displaying the information on battery degradation.

Abstract: A vehicle drive motor control system is provided, which, when a vehicle drive motor is in a locked state, may urge a driver to make a switch from actuation of an accelerator to actuation of a brake, thereby preventing thermal damage to coils inside the motor. The vehicle drive motor control system is capable of, when a vehicle drive motor is in a locked state as a result of actuating an accelerator, making the vehicle slowly move backward (or providing other stimulus to the driver) by decreasing a maximum drive torque value. This may effectively cause the driver to make the switch from actuation of the accelerator to actuation of the brake.

Abstract: A system and method for real-time, self-learning characterization of fuel injector performance during engine operation. The system includes an algorithm for an engine controller which allows the controller to learn the correlation between the fuel mass and pulse width for each injector in the engine in real time while the engine is running. The controller progressively perceives those pulse widths that achieve the desired fuel mass, while it can continuously adapt what it has learned based on various input variations, such as temperature and fuel rail pressure. The controller then uses the learned actual performance of each injector to command the pulse width required to achieve the desired quantity of fuel for each cylinder on each cycle.

Abstract: A control system for an engine includes a target air per cylinder (APC) module, a target area module, and a phaser scheduling module. The target APC module determines a target APC based on a target spark timing, a target intake cam phaser angle, and a target exhaust cam phaser angle. The target area module determines a target opening of a throttle valve of the engine based on the target spark timing, the target intake cam phaser angle, and the target exhaust cam phaser angle. The target area module controls the throttle valve based on the target opening. The phaser scheduling module determines the target intake and exhaust cam phaser angles based on the target APC. The phaser scheduling module controls intake and exhaust cam phasers of the engine based on the target intake and exhaust cam phaser angles, respectively.

Abstract: A method for controlling a vehicle driveline includes determining, for current vehicle operating conditions, an initial engine output torque, at which the driveline meets predetermined structural criteria, establishing a factor that varies with torque converter slip, determining an engine torque limit by multiplying the factor corresponding to a current torque converter slip by the initial engine output torque, and limiting torque produced by an engine connected to the driveline to the engine torque limit.

Abstract: A vehicle has an engine, an exhaust aftertreatment system, an electric machine, and a controller configured to, in response to an actual engine torque output being less than an inferred engine torque, shut down the engine. A vehicle has an engine, an exhaust aftertreatment system, an electric machine, and a controller configured to, in response to an actual engine torque output being less than a first threshold and a torque request to the engine being greater than a second threshold, set a diagnostic code. A method includes receiving an actual engine torque output, receiving an engine torque request, and shutting down the engine when the actual engine torque output is less than a first threshold and the engine torque request is greater than a second threshold for a predetermined time period to limit temperature increase of a catalyst.

Abstract: A turbocharger control method includes: determining a first desired pressure ratio across a first compressor of a first turbocharger; based on the first desired pressure ratio, determining a first desired duty cycle for a first wastegate of the first turbocharger; determining a second desired pressure ratio across a second compressor of a second turbocharger based on the first desired pressure ratio; based on the second desired pressure ratio, determining a second desired duty cycle for a second wastegate of the second turbocharger; generating a first target duty cycle for the first wastegate based on the first desired duty cycle; opening the first wastegate based on the first target duty cycle; generating a second target duty cycle for the second wastegate based on the second desired duty cycle; and opening the second wastegate based on the second target duty cycle.

Abstract: A system and method for improving engine emissions is described. In one example, engine emissions may be improved via increasing rotational resistance of a turbocharger while a temperature of an exhaust after treatment device is less than a threshold temperature. The system and method may reduce an amount of time for the after treatment device to reach an operating temperature.