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 method of monitoring an exhaust gas sensor coupled in an engine exhaust in an engine is provided. The method includes adjusting engine operation responsive to exhaust gas sensor degradation, the degradation identified during deceleration fuel shut-off (DFSO) and compensated based on whether vapor purge operation is occurring in the engine during DFSO.

Abstract: The present invention relates to a power-source apparatus for a vehicle comprising a generator driven by an engine of the vehicle having a function of an idle stop and generating power, a power-storage device storing the power generated by the generator thereat, and a control device. The power-storage device supplies the power to an electric load of the vehicle when the engine is stopped by means of the idle stop. The control device is configured to restart the engine when a voltage of the power-storage device decreases below a lower-limit value after the engine is stopped by means of the idle stop, and stop the engine again when a specified requirement for determining a sufficient recovery of the voltage of the power-storage device by means of the engine's restart is met.

Abstract: A vehicle and a vehicle system are provided with a controller that is configured to generate output indicative of a static road gradient estimation based on a filtered longitudinal acceleration. The filtered longitudinal acceleration is dependent upon a derivative of a longitudinal acceleration. An initial value of the static road gradient estimation corresponds to at least one of a kinematic road gradient estimation and a dynamic road gradient estimation.

Abstract: Disclosed is a method and a system for cutting fuel for a hybrid vehicle. More specifically, a control unit in the vehicle is configured to determine margin torque according to each driving mode, determine whether a current vehicle driving condition is a coasting driving condition, compare a engine torque and a sum of friction torque and the margin torque to determine whether the engine torque is greater than the sum of the friction torque and the margin torque and cut fuel injection to the engine when the engine torque is equal to or less than the sum of the friction torque and the margin torque.

Abstract: In an idle stop system for an engine mounted in a vehicle, when it is determined predetermined stop conditions are met, the engine is automatically stopped. During the engine stop, when it is determined that predetermined restart conditions are met, the engine is automatically restarted. Further, it is determined whether or not a predetermined period of time has elapsed since the restart of the engine. When it is determined that the predetermined period of time has elapsed, the clutch mechanism is controlled into the connection thereof at and after a time instant when it is determined that the predetermined period of time has elapsed. Hence, the connected state of the clutch mechanism is realized after a controlled delay.

Abstract: In a method for operating an engine start-stop function for an engine of a motor vehicle, the engine start-stop function executes engine start-stop interventions in the form of an automatic shutting down and a subsequent automatic switching on of the engine, as a function of one or more vehicle states. An engine start-stop intervention determined by the engine start-stop function is selectively prevented as a function of a statement on the number of starting procedures of the engine carried out.

Abstract: An idling stop device is mounted on a vehicle and automatically stops and starts an engine of the vehicle. A microcomputer has an idling stop function of automatically stopping the engine when a predetermined stop condition is established and automatically starting the engine when a predetermined start condition is established during the stopping of the engine. A detecting unit detects that a power voltage of the microcomputer, which is obtained by dropping a voltage of a battery of the vehicle is lower than a minimum operating voltage of the microcomputer. A storage unit stores voltage reduction information irrespective of a state of the microcomputer if the power voltage is lower than the minimum operating voltage. A power control unit causes a capacitor which stores electric charges corresponding to power for driving a starter motor of the engine to supply power to the starter motor when the engine is started, if the voltage reduction information is stored in the storage unit.

Abstract: A method and a device for supporting a driver of a motor vehicle in utilizing an automatic engine start-stop system of the vehicle is provided. A method includes predetermining or determining a first limit value tG1 that indicates a time, which, after an engine has been stopped through the start-stop system, has to elapse until an energy saving through the stopping of the engine compared with a continued operation of the engine is obtained. A time currently carried out through the start-stop system is registered, where t0 is a point of time at which the engine is stopped through the start-stop system and t is a time. A visually, haptically, and/or acoustically perceptible information dependent on the tG1 and ?t(t) from which the driver can gather the time with effect from which the engine stop leads to the energy saving is generated and output.

Abstract: A method and a device for supporting a driver of a motor vehicle in utilizing an automatic engine start-stop system of the motor vehicle is provided. The method includes registering and storing, for at least one operating time of the motor vehicle and for each engine stop of a total number initiated by the automatic engine start-stop system in the operating time, at least the respective time durations where k=0, 1, 2, . . . P, where P ? [0, 1, 2, . . . ]. A first ratio value that is dependent on the operating time and the added time durations determined: W 1 = ? k = 0 P B ? ? t MS , k t B . ( 1 ) The first ratio value is output and/or an output which is dependent on the first ratio value is generated and output.

Abstract: A stop/start vehicle includes at least one controller that, in response to predicting a vehicle stop, initiates an engine pre-shutdown protocol such that vehicle subsystems begin to prepare for engine shutdown prior to a speed of the vehicle reaching approximately zero to reduce time between the speed of the vehicle reaching approximately zero and engine shutdown.

Abstract: The fuel injection apparatus for the internal combustion engine includes: a fuel injector having a leading end portion that has an internal space in which fuel is accumulated and an injection port for injecting fuel; and an adsorbent disposed in the internal space, the adsorbent being capable of selectively adsorbing an alcohol component in a blended fuel of gasoline and alcohol. In this fuel injection apparatus, it is determined whether or not a fuel pressure is higher than a predetermined low fuel pressure when a request is issued for bringing an internal combustion engine to a stop. If it is determined that the fuel pressure is higher than the low fuel pressure, the fuel pressure is kept at the low fuel pressure for a predetermined period of time before the internal combustion engine is brought to a stop.

Abstract: Embodiments for selectively filling a cylinder block cooling jacket with oil are provided. In one example, a control unit may be rotated among a plurality of working positions to open up and/or block flow of oil into and out of the cylinder block cooling jacket.

Abstract: Methods and systems are provided for improving engine exhaust emissions while enabling exhaust catalyst regeneration following an engine lean event. Prior to a VDE event, or prior to an engine idle-stop, ammonia is produced and stored on an exhaust underbody SCR catalyst. Then, during the engine restart after the VDE mode or the idle-stop, the stored ammonia is used to treat exhaust NOx species while an upstream exhaust underbody three-way catalyst is regenerated.

Abstract: A Start-Stop method and system for optimizing a selected set of parameters to provide an ideal balance between cabin thermal comfort and fuel economy performance is disclosed. The method and system includes several parameters to manage how long and when the engine OFF time will occur. Such parameters include, but are not limited to, outside ambient temperature, cabin temperature, cabin humidity, engine coolant temperature, and evaporator thermistor temperature. A control logic monitors inputs such as cabin humidity and, under certain conditions, sends a request for the engine to be ON. Other factors influencing engine ON time include inputs from the wiper(s), the heated windshield, the heated back light, the HVAC blower, and the temperature control setting. The disclosed system has utility in both electronic automatic temperature control (EATC) systems as well as in manual temperature control (MTC) systems.

Abstract: A system and method of providing supplementary oil flow to an oil circuit of an internal combustion engine is described. The primary oil supply is from a mechanical oil pump. The supplementary oil supply is provided using a control system, one or more sensors, and an electrical oil pump. The system is beneficial in circumstances where the mechanical oil pump provides insufficient oil flow, including during engine shutdown.

Abstract: Methods and systems for disabling a fuel shut-off state of a vehicle. One method includes counting, by a controller, a number of transitions of an engine included in the vehicle between a fuel shut-off state and a fuel state, determining, by the controller, whether the number exceeds a predetermined threshold, and issuing a disable command, by the controller, to the engine included in the vehicle. The disable command causes the engine to exit a current fuel shut-off state. Another system includes a controller configured to determine whether acceleration is requested while an engine included in the vehicle is in a fuel shut-off state. When acceleration is requested while the vehicle is in a fuel shut-off state, the controller is configured to issue a disable command to the engine prior to issuing an acceleration command. The disable command causes the engine to exit the fuel shut-off state.

Abstract: A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one example, fuel injection timing is selectively adjusted based on engine stop position and amount of time the engine is stopped. The method may improve engine starting and lower engine noise.

Abstract: In a method for stopping an internal combustion engine of a motor vehicle, stop prevention conditions are established for preventing automatic stopping of the internal combustion engine even when all stop conditions are me but one of the stop prevention conditions is not met. One of the stop prevention conditions is for example an activated risk status (GS), the risk status (GS) being activated when an acute indication (AI) is present.

Abstract: A method for starting an engine includes sensing a triggering event and monitoring pressure in a fuel rail. A cam shaft of the engine is oscillated with a cam phaser. The cam shaft does not complete a full rotation during the oscillation. A fuel rail pump is operated with the oscillating cam shaft until the monitored pressure in the fuel rail reaches a minimum level, and the engine is started after reaching the minimum level.

Abstract: A control for an internal combustion engine having a fuel injection valve for directly injecting fuel to a combustion chamber of the engine, an ignition device for burning an air-fuel mixture containing the fuel injected from the fuel injection valve, and a variable cylinder management mechanism that is capable of changing the number of operating cylinders is provided. The control includes making a transition to an operating mode where the number of operating cylinders is decreased through the variable cylinder management mechanism. It is predicted based on an operating condition of the engine that an air-fuel ratio of an exhaust atmosphere of the engine becomes lean due to a stop of the fuel injection into one or more cylinders to be halted by the transition.

Abstract: A starting system of an engine mounted in a vehicle capable of running using torque output from an electric motor includes a estimation portion that estimates engine speed and output torque of the engine when the engine is driven to realize the power requested by the driver, a comparing portion that compares a time for which the engine continues to be stopped with a first time and a second time that is longer than the first time, a first starting portion that starts the engine when estimated engine speed is greater than first speed and less than second speed, and the estimated output torque is greater than first value and less than second value, and a second starting portion that starts the engine when the time for which the engine continues to be stopped is longer than the second time.

Abstract: Various systems and methods are described for controlling an engine in a vehicle, the engine being coupled to a transmission. One example method comprises, under selected braking conditions, shutting-off the engine and spinning-down the engine to rest while the vehicle is traveling, and in response to a foot-off-brake event, restarting the engine by at least partially engaging the transmission to assist in spinning-up of the engine from rest while the vehicle is traveling. In this manner, vehicle inertia can be used to assist in spinning-up the engine from rest when the vehicle is moving.

Abstract: An electric motor system that triggers brake and steering function upon engine failure featuring an electric motor; and a vacuum pump, an oil pump, and a sensor each operatively connected to the electric motor. The vacuum pump is connected to the vehicle's brake servo and the oil pump is connected to an oil reservoir and to the vehicle's steering sector. The sensor is adapted to detect when the engine is turned off. When the engine is turned off the sensor is activated and causes activation of the electric motor. Activation of the electric motor causes activation of the vacuum pump and the oil pump. The vacuum pump functions to provide a vacuum in the servo brake of the vehicle and the oil pump functions to create oil pressure with oil in the oil reservoir and direct oil pressure to the steering sector.

Abstract: When an abnormality determining process is cancelled when a fuel cut is stopped, an EGR valve (33), which is open wider than normal from the process, is returned to its original opening amount (i.e., fully closed), and fuel injection in an engine (1) is resumed. However, during execution of the abnormality determining process, an EGR passage (32) is full of air. Also, when the EGR valve (33) is returned to the fully closed state, there is a response delay in the change in the flowrate of air that flows from the EGR passage (32) into the air passage (4) following that return, such that excess air flows into the air passage (4). As a result, the intake air amount of the engine (1) becomes excessive for the fuel injection quantity after fuel injection resumes. The fuel injection quantity is thus increase corrected to inhibit this from happening.

Abstract: A variable valve mechanism provided on a exhaust side of an internal combustion engine, in which a most advanced state is set as an initial state, operating condition detecting means for detecting operating conditions, variable valve control means for controlling an operation of the variable valve mechanism in accordance with the operating conditions, engine condition determining means for determining whether the internal combustion engine is in a cold state or a warm state, and stop request determining means for determining whether or not a stop request has been issued in relation to the internal combustion engine are provided. When a stop request is issued in the cold state, the internal combustion engine is stopped after returning the variable valve mechanism to the initial state.

Abstract: In a hybrid vehicle including an engine provided with a plurality of VVTs (variable valve timing mechanisms) as one motive power source, an ECU increments a time lapse counter when a sensor detects the fact that a greatest-retard command has been output to all VVTs and an operation position of each VVT has actually returned to a greatest-retard position in response to the greatest-retard command. The ECU determines whether count by the time lapse counter has exceeded a predetermined defined time or not, and it does not permit engine stop until count by the time lapse counter reaches the predetermined defined time and permits engine stop when count by the time lapse counter has exceeded the predetermined defined time.

Abstract: An ECU executes a program including a step (S102) of prohibiting idle priority control if automatic stop control of an engine is prohibited (YES in S100), and a step (S104) of permitting the idle priority control if the automatic stop control of the engine is not prohibited (NO in S100).

Abstract: A semiconductor device has a first and a second external terminals coupled to power supply wiring that couples one end of a current detecting resistance and a power supply terminal of a battery, a third external terminal coupled to an other end of the current detecting resistance, and a control circuit for controlling an output of a second measurement current destined to the third external terminal, and measures a voltage difference between the first external terminal and the second external terminal.

Abstract: Methods and systems are provided for accurately determining cylinder fueling errors during an automatic engine restart. Fueling errors may be learned during a preceding engine restart on a cylinder-specific and combustion event-specific basis. The learned fueling errors may then be applied during a subsequent engine restart on the same cylinder-specific and combustion event-specific basis to better anticipate and compensate for engine cranking air-to-fuel ratio deviations.

Abstract: In a control method suitable for an internal combustion engine (1) of a motor vehicle with an automatic engine cut-off and starting system (33) by which the internal combustion engine (1) can be cut off and started independently from the driver of the motor vehicle, the starting of the internal combustion engine (1) is detected and a variable determined, which represents a measure for the work performed by the internal combustion engine (1) since it has been started. The cut-off of the internal combustion engine (1) is controlled by the automatic engine cut-off and starting system (33) according to the variable.

Abstract: A method and apparatus for controlling a diagnostic module for an exhaust gas sensor in a vehicle is provided. The exhaust gas sensor is located in an exhaust pathway in the vehicle. The diagnostic module may be configured to perform a signal range verification of an oxygen sensor portion of the exhaust gas sensor. A controller is operatively connected to the exhaust gas sensor and to the vehicle engine. The controller disables the diagnostic module when one or more entry conditions are satisfied. The entry conditions may include requiring the engine speed to be greater than a fuel cut-off threshold, the fuel cut-off threshold being the engine speed at which the fuel to the engine is terminated. The entry conditions may include: no fuel being delivered to the engine; and a vehicle exhaust brake mode being activated such that the exhaust pathway from the engine is obstructed.

Abstract: An auto-stop/start system for a vehicle includes an object identification module, a distance determination module, and an auto-stop/start control module. The object identification module determines a location of an object that is in a path of the vehicle. The distance determination module determines a distance between the vehicle and the location of the object. The auto-stop/start control module selectively disables provision of fuel to an engine of the vehicle while an ignition system of the vehicle is ON based on the distance.

Abstract: Various systems and methods are described for an exhaust gas sensor coupled to an exhaust system of an engine. One example method comprises, during selected engine fueling conditions, alternating between applying different voltages to the sensor; and identifying an amount of alcohol in fuel injected to the engine based on sensor outputs at the different voltages.

Abstract: In a power-steering control system installed in a vehicle, a state determiner determines whether an engine is in a state in which the engine is stopped. A steering-torque detector measures steering torque applied to a steering wheel by a driver of the vehicle. A controller holds the power steering motor in a ready state to generate the assist torque if it is determined that the engine is in the stop state and that the measured steering torque is equal to or higher than first threshold torque.

Abstract: The invention provides an inter-cylinder air/fuel ratio imbalance determination apparatus and method. The determination apparatus includes a “limiting current type air/fuel ratio sensor”, and acquires a pre-correction index quantity that is greater the greater the degree of non-uniformity of the cylinder-by-cylinder air/fuel ratios, on the basis of a time differential value of the output value of the air/fuel ratio sensor. The determination apparatus obtains as the correction-purpose output value an average value of the output value obtained during a fuel-cut operation. The correction-purpose output value is greater the higher the responsiveness of the air/fuel ratio sensor. The determination apparatus acquires an air/fuel ratio imbalance index value by correcting the pre-correction index quantity so that the pre-correction index quantity is smaller the greater the correction-purpose output value.

Abstract: An engine control system comprises a driver input module, a cylinder actuation module, and an active fuel management (AFM) module. The driver input module generates a fuel saver mode (FSM) signal having a first state based upon a driver input. The cylinder actuation module selectively disables at least one of a plurality of cylinders of an engine based upon a deactivation signal having a first state. The AFM module generates the deactivation signal based on at least one engine parameter and at least one threshold. The at least one threshold is modified when the FSM signal has the first state.

Abstract: To provide a stop control system for an internal combustion engine, which is capable of accurately stopping a piston at a predetermined position while compensating for variation in the stop characteristic of the piston and aging thereof. The stop control system 1 for the engine 3 according the present invention controls a throttle valve 13a toward an open side when an engine speed NE becomes lower than a stop control start rotational speed NEIGOFTH after the engine 3 is stopped (step 42), whereby a final compression stroke rotational speed NEPRSFTGT is controlled to a predetermined reference value NENPFLMTO, to thereby control the stop position of the piston 3d to a predetermined position. Further, the correlation between the stop control start rotational speed NEIGOFTH and the final compression stroke rotational speed NEPRSFTGT is determined (step 5, FIG.

Abstract: A fuel control system for controlling the purging of alternate fuel in an internal combustion engine at shutdown includes: at least one valve device configured to deliver a fuel supply to the engine; a first fuel source configured to provide a primary fuel to the valve device; a second fuel source configured to provide an alternate fuel to the valve device; and a controller connected to the valve device and adapted to be connected to an ignition system. The controller is configured to control the valve device responsive to a status of one of the engine and the ignition system.

Abstract: In an ordinary mode, when an abnormality diagnosis of a PM sensor attached to a downstream opening downstream of a filter is performed, the PM sensor is moved to a first upstream opening upstream of the filter, and an exhaust gas is discharged from an engine. An ECU stores a program for the abnormality diagnosis. In an abnormality diagnosis mode, the ECU diagnoses the PM sensor by comparing an output value of the PM sensor to a standard output after performing the program. The first upstream opening may be closed by a cover in the ordinary mode.

Abstract: Provided is an automatic stop and restart device for an engine that is capable of suppressing occurrence of an abnormal condition even if a transmission state is changed during an engine restart process after an engine restart condition is satisfied in an automatic engine stop process. A controller performs the automatic engine stop process and the engine restart process. If a determined state of a transmission is a drive range, a transmission state determination unit drives a pinion gear thrust unit at timing determined by a first pinion gear thrust timing determination unit. If the determined state of the transmission is a non-drive range, the transmission state determination unit drives the pinion gear thrust unit at timing determined by a second pinion gear thrust timing determination unit.

Abstract: An electric control unit is used to generate control signals for the alternator-starter assembly on the basis of first information signals representative of a state of the vehicle and a control unit is used to generate control signals for power circuits on the basis of diagnosis signals representative of the state of the alternator-starter assembly. The control signals are generated using the electronic control unit also on the basis of at least one first diagnosis signal, and control signals are generated using the control circuit also on the basis of second information signals from a data communication bus.

Abstract: A motor generator and a power converter are driven by an engine, to supply electric power to a power storage device. ECU causes the engine to start if SOC of the power storage device falls below a first threshold value, and causes the engine to stop if SOC exceeds a second threshold value which is larger than the first threshold value. During a vehicle stop, if SOC exceeds a third threshold value which is larger than the first threshold value and smaller than the second threshold value, ECU causes the engine to stop.

Abstract: Systems and methods for improving operation of a stop/start vehicle are presented. In one example, an engine throttle position is adjusted in response to whether or not a starter engages a flywheel during engine stopping.

Abstract: A method for diagnosing an exhaust gas catalytic convertor and/or an exhaust gas sensor arranged downstream and/or upstream of the exhaust gas catalytic convertor in an exhaust gas system of a motor vehicle internal combustion engine. The internal combustion engine is operated with an air/fuel mixture having a substoichiometric air/fuel ratio. The internal combustion engine is switched off and an unfired towed operation with disabled fuel supply is performed in which air drawn in by the internal combustion engine is conveyed through the exhaust gas system to the exhaust gas catalytic convertor and exhaust gas sensor. The internal combustion engine is then operated with a substoichiometric air/fuel ratio and a signal of the exhaust gas sensor is evaluated with regard to a predefinable evaluation criterion, the signal being provided at least in a period of time between switch-off and the subsequent self-running of the internal combustion engine.

Abstract: An ISG entry apparatus and method is capable of operating ISG logic without employing a battery sensor. The ISG entry apparatus includes a starting voltage detection unit detecting a starting voltage of an ISG vehicle having no battery sensor mounted therein, a cooling water detection unit detecting a cooling water temperature of the ISG vehicle, an ISG entry frequency detection unit detecting an ISG entry frequency of the ISG vehicle, an accumulated charge amount detection unit detecting an accumulated charge amount of the ISG vehicle during driving, a starting number counting unit counting the starting number of the ISG vehicle, and an engine control unit determining whether or not to enter a mode in which an ISG operation is performed based on the starting voltage, the cooling water temperature, the ISG entry frequency, the accumulated charge amount, and the starting number and performing an ISG operation.

Abstract: A method for improving starting of an engine that may be automatically started is provided. In one example, spark timing of an automatically started engine is in advance of spark timing for an operator requested engine start. The approach may reduce vehicle driveline disturbances.

Abstract: A power supply degradation determination apparatus which is mounted to the vehicle includes a controller and a DC-DC converter that control execution of a charge phase in which a capacitor capable of accumulating regenerative energy of the vehicle is charged and execution of a discharge phase in which the capacitor is discharged. The controller detects the internal resistance of the capacitor using the difference between the terminal voltage and the open circuit voltage of the capacitor during the execution of the discharge phase and the discharge current thereof, determines whether the internal resistance is a predetermined value or more, and delays the execution start of the discharge phase for a predetermined time when the internal resistance is determined to be the predetermined value or more.

Abstract: In a method for generating an internal combustion engine configured to run on both a gas fuel and a liquid fuel, the shutoff valve of the gas injection system is initially closed, the engine is then operated with the liquid fuel, and subsequently all gas injection valves of the gas injection system are opened in a predefined pattern while the shutoff valve is still closed.

Abstract: A control apparatus for an internal combustion engine is provided, which is capable of suppressing deterioration of exhaust emission due to an unburned fuel contained in oil which enters a combustion chamber during valve stop control while preventing inflow of fresh air to a catalyst, at a time of valve return following return from fuel cut. Variable valve operating apparatuses having valve stop mechanisms capable of changing operation states of an intake valve and an exhaust valve between valve operation states and valve closed and stopped states are included. Valve stop control that changes the operation states of the intake valve and the exhaust valve to the valve closed and stopped states is performed, at a time of execution of the fuel cut. When a return request from the fuel cut with the valve stop control is detected, a fuel is supplied to a combustion chamber before the operation state of the exhaust valve is returned to the valve operation state.