Abstract: Methods, systems, and computer readable storage media are provided for operating a vehicle including an engine that may be automatically shutdown in response to AESS conditions. In one example, the method comprises, determining an AESS emission credit corresponding to an amount of AESS operation; and adjusting an engine operating parameter based on the determined AESS emission credit. Further, in another example, the method comprises retarding injection timing in response to manifold air temperature, wherein an amount of retard is adjusted responsive to an amount of AESS operation.

Abstract: A variety of methods and arrangements for controlling the operation of an internal combustion engine in a skip fire variable displacement mode are described. Generally, an engine is controlled to operate in a skip fire variable displacement mode. In the variable displacement mode, selected combustion events are skipped so that other working cycles can operate at better thermodynamic efficiency. More specifically, selected “skipped” working cycles are not fired while other “active” working cycles are fired. Typically, fuel is not delivered to the working chambers during skipped working cycles. In one aspect of the invention, a firing pattern is determined that is not fixed but the active working cycles are selected to favor the firing of working chambers that have recently been fired at least in part to reduce wall wetting losses.

Abstract: A control apparatus for an internal combustion engine is employed for a multi-cylinder internal combustion engine. The control apparatus includes a variable valve operating mechanism which changes a valve characteristic of an engine valve; a valve stop mechanism which stops opening/closing of the engine valve in at least one cylinder; and a controller which executes a variable valve control that makes an actual value of the valve characteristic match a target value by executing a hydraulic pressure control for the variable valve operating mechanism, and which operates the valve stop mechanism so that a reduced-cylinder operation is performed when an engine operating state is in a preset reduced-cylinder operation region. If it is determined that a pressure of hydraulic fluid supplied to the variable valve operating mechanism satisfies a preset condition when the engine operating state is in the reduced-cylinder operation region, the controller prohibits the variable valve control.

Abstract: A control apparatus for an internal combustion engine is employed for a multi-cylinder internal combustion engine. The control apparatus includes a variable valve operating mechanism which changes a valve characteristic of an engine valve; a valve stop mechanism which stops opening/closing of the engine valve in at least one cylinder; and a controller which executes a variable valve control that makes an actual value of the valve characteristic match a target value by executing a hydraulic pressure control for the variable valve operating mechanism, and which operates the valve stop mechanism so that a reduced-cylinder operation is performed when an engine operating state is in a preset reduced-cylinder operation region. If it is determined that a pressure of hydraulic fluid supplied to the variable valve operating mechanism satisfies a preset condition when the engine operating state is in the reduced-cylinder operation region, the controller prohibits the variable valve control.

Abstract: An engine control system for a vehicle includes a variable displacement module that deactivates N of M cylinders of an engine during a fuel management mode. N is an integer and M is an integer greater than 1. A spark control module generates a spark timing signal for the N cylinders based on a pre-dwell time and a fuel management dwell modifier during the fuel management mode. The spark control module reduces dwell time of the N cylinders during the fuel management mode based on the fuel management dwell modifier.

Abstract: In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled.

Abstract: The invention relates to a process for the lambda control of an internal combustion engine with exhaust catalyst, having a lambda probe mounted downstream from the exhaust catalyst as control probe, a probe by means of which a post-catalyst lambda value of an exhaust gas flow leaving the exhaust catalyst is registered. Furthermore, a lambda control mechanism is provided by means of which the post-catalyst lambda value is set to a predetermined value such that a specific, predetermined degree of oxygen charging of an oxygen reservoir of the exhaust catalyst is set, the value predetermined for the degree of charging with oxygen of the oxygen reservoir being predetermined as a function of a predetermined degree of conversion of the exhaust catalyst.

Abstract: A control system for a vehicle that includes an engine includes an engine-stop module and a fuel control module. The engine-stop module determines whether to stop the engine based on at least one of input from a driver of the vehicle and vehicle operating parameters. The fuel control module stops the engine and controls a rate of engine speed decay by disabling fueling to cylinders of the engine according to a predetermined sequence.

Abstract: A multi-cylinder spark-ignition direct-injection internal combustion engine is re-fired subsequent to a fuel cutoff event wherein fuel to all cylinders is cutoff. Re-firing the engine includes selectively firing individual cylinders during re-firing engine cycles exclusively at a predetermined fixed fuel mass until all cylinders have been fired at least once, whereafter subsequent firing of individual cylinders is not limited to the predetermined fixed fuel mass.

Abstract: A method is provided for controlling an engine having two cylinders, one of which having an adjustable valve. The method comprising performing a combustion in two cylinders having pistons, the combustions for said cylinders occurring during a common stroke of the pistons; increasing a number of strokes in a cycle of one of the two cylinders; and returning operation of the one of the two cylinders to four strokes, so that combustion of the one of the two cylinders occurs sequentially from the other of the two cylinders.

Abstract: A control system includes an engine enable module and a fuel control module. The engine enable module determines whether predetermined operating conditions of a spark ignition direct injection (SIDI) engine are satisfied and enables an engine prime mode when the predetermined operating conditions are satisfied. The fuel control module controls a fuel injector to deliver a prime pulse to a cylinder of the SIDI engine when the engine prime mode is enabled. The fuel injector delivers the prime pulse by opening for a pulse width to inject fuel directly into the cylinder when the SIDI engine is stopped.

Abstract: In a gas guide system, a combustion engine and a method for operating the engine comprising a gas supply arrangement for supplying gas to the engine, a gas discharge system including an exhaust gas treatment unit for releasing gas from the engine, the gas guide system including a first partial gas discharge line for discharging a first partial gas stream from a first fired cylinder group via the exhaust gas treatment unit and a second gas discharge line for discharging a second partial gas stream from a second unfired cylinder group separately from the hot gas stream directed through the exhaust gas treatment unit to keep it at operating temperatures.

Abstract: An engine control system includes a fuel cutoff (FCO) module, a fuel control module, and a spark control module. The FCO module, when a FCO event is disabled, determines a feed-forward (FF) number of cylinders to offset a delay period associated with supplying fuel to the cylinders of an engine and selectively maintains a FCO torque request at a predetermined torque. The fuel control module commands fuel be supplied to the FF number of cylinders of the engine when the FCO event is disabled. The spark control module maintains a spark timing of the FF number of cylinders at a fully retarded spark timing based on the FCO torque request.

Abstract: An internal combustion engine (1) having at least two cylinders (4) or at least two groups (2, 3) of cylinders (4), of which at least one is electronically deactivatable, has at least one inlet strand (5, 6) and at least one outlet strand (7, 8). In order to improve the quality of the operating noise in the interior of a passenger cell, at least one inlet strand (5, 6) of at least one deactivated cylinder (4) can be acoustically connected via at least one sound conducting apparatus (21, 22) to an inner chamber (20) of a vehicle (19).

Abstract: Provided is a control apparatus for an internal combustion engine that can suppress blowback of in-cylinder residual gas to an intake passage when reverting from a fuel-cut operation accompanied by valve stopping control of an intake valve while suppressing an oil ascent during execution of the fuel-cut operation, and a control apparatus for a vehicle equipped with the internal combustion engine. When executing a fuel-cut operation accompanied by intake valve stopping control, advancement control of the opening/closing timing of an exhaust valve (32) is executed. If the advancement control is being executed in a case where a request to revert from the fuel-cut operation has been detected, an advance amount of the opening/closing timing of the exhaust valve (32) is retarded so as to become less than or equal to a predetermined value.

Abstract: A method for operating an engine of a vehicle, the engine having one or more deactivatable cylinders, the method including controlling the stability of a vehicle in response to vehicle acceleration, and reactivating or deactivating combustion in at least a cylinder in response to vehicle acceleration.

Abstract: An engine control system includes a power supply module, a measurement module, and a calibration module. The power supply module disables power supplied to N components of an engine when M cylinders of the engine are deactivated, wherein M and N are integers greater than or equal to one. The measurement module measures outputs of the N engine components. The calibration module calibrates the measurement module based on unpowered measurements from one or more of the N engine components during a period after the power supplied to the N components is disabled.

Abstract: There is provided, in one aspect of the present description, a method of controlling a spark ignited internal combustion engine having a fuel injector which injects fuel directly into its combustion chamber. The method comprises stopping the fuel injection if a desired torque for the engine is a predetermined torque or less and a speed of the engine is a predetermined speed or greater. The method comprises resuming the fuel injection by injecting a first amount of fuel directly into the combustion chamber during a negative pressure period and injecting a second amount of the fuel into the combustion chamber during an intake period. The method further includes resuming the fuel injection by injecting a third amount of the fuel directly into the combustion chamber during the negative pressure period and injecting a fourth amount of the fuel into the combustion chamber during the intake period.

Abstract: A direct-injection, compression-ignition internal combustion engine control adapts nominal minimum pulsewidth parameters controlling the fuel injectors to minimize pilot fuel delivered to the cylinders required to initiate a preliminary combustion event.

Abstract: A method for operating an internal combustion engine (2) having multiple cylinders (3); fuel may be injected into the multiple cylinders (3) via corresponding injectors, and air may be let in via corresponding intake valves (9) in order to form an air-fuel mixture in the cylinders (3) for providing a drive torque, and combustion exhaust gas may be discharged from the cylinders (3) via a catalytic converter (6); having the following steps: operating the internal combustion engine (2) in a first engine operating mode in which no fuel is injected into at least one first cylinder (3), so that the at least one first cylinder (3) does not contribute to the drive torque, and fuel is only injected into at least one second cylinder (3) in order to provide the drive torque; and switching to a second engine operating mode in which fuel is injected into the at least one first cylinder (3) and into the at least one second cylinder (3), so that the at least one first cylinder (3) and the at least one second cylinder (3) co

Abstract: Various systems and methods are described for operating an engine in a vehicle in response to an ambient humidity generated from an exhaust gas sensor. One example method comprises, during engine non-fueling conditions, where at least one intake valve and at least one exhaust valve of the engine are operating, generating an ambient humidity from the exhaust gas sensor and, under selected engine combusting conditions, adjusting an engine operating parameter based on the ambient humidity.

Abstract: A system or method for controlling a multiple cylinder internal combustion engine operable in a reduced displacement mode with at least one valve or cylinder selectively deactivated include monitoring valve operation by analyzing camshaft position to detect valve operation inconsistent with a current cylinder state (activated or deactivated) and controlling the engine in response to detecting the inconsistent operation. The camshaft position may be used to produce a surrogate signal indicative of intake/exhaust valve lift generated using camshaft sensor tooth deviation relative to an expected or reference tooth position for a corresponding crankshaft position and compared to a corresponding threshold. The surrogate signal indicative of valve lift may also be generated by pattern matching or correlation of one or more reference tooth position patterns to a measured or inferred tooth position pattern.

Abstract: In a startup operation of an internal combustion engine, the internal combustion engine is started by supplying fuel to only a first cylinder group formed of a portion of cylinders, from among a plurality of cylinders that make up the internal combustion engine, when a startup condition of the internal combustion engine has been satisfied, and then fuel starts to be supplied to a second cylinder group formed of the remaining cylinders after the internal combustion engine has started. Meanwhile, in a stopping operation of the internal combustion engine, the internal combustion engine is stopped when a shutoff condition of the internal combustion engine is satisfied, by first stopping the supply of fuel to the second cylinder group and then stopping the supply of fuel to the first cylinder group after the supply of fuel to the second cylinder group has been stopped.

Abstract: An internal combustion engine control apparatus includes a fuel supplying mechanism supplying fuel to the internal combustion engine; an exhaust gas recirculating mechanism recirculating exhaust gas of the internal combustion engine to an intake side of the internal combustion engine; a flow adjuster selectively increasing and decreasing a strength of flow of the supplied fuel and the recirculated exhaust gas in a cylinder of the internal combustion engine; a stop controller controlling the fuel supplying mechanism to stop the supply of fuel and controlling the exhaust gas recirculating mechanism to stop the recirculation of exhaust gas, when the internal combustion engine is operated in a predetermined deceleration mode; and in-cylinder flow controller controlling the flow adjuster to increase the strength of the flow when the control to stop the supply of fuel is cancelled.

Abstract: An engine control system includes an active fuel management (AFM) control module that selectively enables and disables an AFM mode using at least one AFM valve. The engine control system further includes a solenoid fault correction module that selectively opens and closes at least one AFM valve when AFM mode is disabled.

Abstract: The invention relates to a method for controlling the operating mode of an internal combustion engine (1) comprising several cylinders (3) and an injection system (4) with one injection unit (5) per cylinder (3). According to said method: a digital measuring signal, which characterizes the combustion of fuel (6) in the internal combustion engine (1), is first determined; said digital measuring signal is then transformed into a frequency range; a misfiring of the ignition is detected using the amplitude information of the transformed measuring signal and if a misfiring has occurred, the injection of the individual cylinders (3) is deactivated sequentially for a predefined period and for each cylinder the corresponding digital measuring signal that characterizes said cylinder is determined and transformed into the frequency range and a misfiring cylinder (3) is identified during the evaluation of the transformed measuring signal using the amplitude information.

Abstract: A method of operating the evaporative purge system for an engine of a vehicle propulsion system is provided. In one example, the method provides for charging and purging two fuel vapor canisters independently or at the same time. The method may provide for improved fuel vapor processing under some conditions.

Abstract: A multi-cylinder engine is configured to be able to perform a selected cylinder operation in which combustion is stopped in some cylinders. The multi-cylinder engine includes an ignition-timing adjustment section. This ignition-timing adjustment section retards ignition timing of each operating cylinder when the number of operating cylinders is small or when the engine operates in a selected cylinder operation mode in which explosion occurs at irregular intervals. In such a case, the peak of cylinder internal pressure is lowered by ignition timing retard. Thus, vibration and noise can be suppressed effectively.

Abstract: A vehicle control system includes a sensor that generates a vehicle speed signal. A cruise control system generates a cruise control signal to maintain a vehicle at a target speed. A control module compares the vehicle speed signal to the target speed signal. The control module calculates different cruise control gains to delay changes in throttle position of the cruise control system when the vehicle speed signal is greater than the target speed.

Abstract: A method for operating an engine of a vehicle, the engine having one or more deactivatable cylinders, the method including controlling the stability of a vehicle in response to vehicle acceleration, and reactivating or deactivating combustion in at least a cylinder in response to vehicle acceleration.

Abstract: In an engine which may show a behavior where an engine speed is not always minimized after compression top dead center of a cylinder in which poor fuel injection occurred, the cylinder in which poor fuel injection occurred is detected.

Abstract: A method of changing an active cylinder count of an engine may include determining a vehicle vibration limit and a vehicle vibration level. The cylinder count may be modified (increased or decreased) based upon the vehicle vibration limit and the vehicle vibration level. The vehicle vibration limit may be based upon a vehicle speed, and a coolant temperature of the engine. The vehicle vibration level may be based upon at least one of a desired torque of the engine and a number of active cylinders of the engine. According to other features, the vehicle vibration level may be based upon a measured vibration level of a vehicle component.

Abstract: Method to detect a faulty operating condition during a cylinder cutoff of an internal combustion engine with at least two cylinder banks, wherein the internal combustion engine comprises in each case a separate mechanism to determine the Lambda value of the combustion for each cylinder bank. When the Lambda values of the cylinder banks change in opposite directions, a faulty cylinder cutoff is suggested.

Abstract: A method for controlling an internal combustion engine, in which a traveling with reduced cylinders is controlled according to the idle-speed after the engine starting, so as to restrain the discharge of white smokes at the time lag for temperature equilibration soon after a cold starting. The method comprises a coolant water temperature detecting means 10 for detecting the coolant water temperature in the internal combustion engine 1, a rotation speed detecting means 12 for detecting the rotation speed of the internal combustion engine 1 and a control means for controlling the operation of the internal combustion engine 1 in accordance with the coolant water temperature and the rotation speed. When the internal combustion engine is evaluated that it is at the cold starting and the rotation speed reaches the predetermined rotation speed after the engine starting, a traveling with reduces cylinders is performed, which reduces the number of cylinders injecting fuels for a certain period of time.

Abstract: Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection.

Abstract: The engine operational region in which the cylinder deactivation operation is performed in the cylinder deactivation control is switched between the cylinder deactivation region AP1 and the cylinder deactivation region AP2 depending on whether a variable valve timing mechanism is in an operation allowed state and control of the valve timing of an intake valve is being performed, or the variable valve timing mechanism is in an operation inhibited state and the control of the valve timing of the intake valve is stopped. In this way, depending on whether the variable valve timing mechanism is in the operation allowed state or in the operation inhibited state, the engine operational region in which the cylinder deactivation operation is performed can be set so that the engine operational region is made suitable for each of these state.

Abstract: A control system includes an engine mode transition module that initiates a deactivated mode to deactivate at least one cylinder. A scheduling module schedules a command to disable a spark plug at least one engine cycle after a command to disable a fuel injector for the at least one cylinder.

Abstract: A system or method for controlling a multiple cylinder internal combustion engine operable in a reduced displacement mode with at least one valve or cylinder selectively deactivated include controlling the engine in response to detecting opening of an exhaust valve after deactivation based measured or inferred exhaust pressure changes after deactivation. In one embodiment, controlling the engine includes reactivating one or more deactivated cylinders/valves, inhibiting subsequent deactivation, and/or storing a diagnostic code in a computer readable storage medium in response to detecting valve opening after deactivation.

Abstract: In a method for improving the running smoothness of an internal combustion engine (1) which has at least one combustion chamber and at least one controllable actuator whose position has an influence on the combustion in the at least one combustion chamber, an irregular running value (f) of the internal combustion engine (1) is determined and compared with a predefined first irregular running limit value (f1thres), and in the event of the irregular running value (f) exceeding a predefined first irregular running limit value (f1thres), the actuator is moved from a starting position into an end position while the combustion in all of the combustion chambers of the internal combustion engine (1) is continued.

Abstract: It is suppressed that nanoparticles generated in an internal combustion engine are discharged into the atmosphere. In a cylinder or an exhaust system of the internal combustion engine, microparticles having a particle diameter larger than that of the nanoparticles are generated, and the nanoparticles generated in the internal combustion engine are adsorbed by the microparticles, thereby increasing the diameter of the nanoparticles. The microparticles can be generated in the cylinder as the soot, for example. Additionally, by providing a carbon microparticle generation device in the exhaust system, the microparticles can be generated, too. By making the nanoparticles adsorbed by the microparticles and increasing the diameter of the nanoparticles, discharging of the nanoparticles can be suppressed.

Abstract: A method of output torque smoothing for a hybrid powertrain having an electric machine and a spark ignition engine with a first cylinder and a second cylinder includes commanding a fuel-cut transition, including consecutively initiating and completing deactivation of the first cylinder and initiating and completing deactivation of the second cylinder. The fuel-cut transition is characterized by an absence of retarding spark to the first cylinder and second cylinder. Fuel is supplied to the first cylinder until the first cylinder completes deactivation and to the second cylinder until the second cylinder completes deactivation. The electric machine captures a first torque from the first cylinder by generating electricity until the first cylinder completes deactivation and captures a second torque from the second cylinder by generating electricity until the second cylinder completes deactivation.

Abstract: A control system comprising a spark knock detection module that detects a spark knock in an engine of a hybrid vehicle, and a torque control module that selectively regulates an engine torque output and an electric machine torque output based on the spark knock. A method comprising detecting a spark knock in an engine of a hybrid vehicle, and selectively regulating an engine torque output and an electric machine torque output based on the spark knock.

Abstract: An engine having a first and second bank of cylinders is disclosed. The engine may have improved fuel economy and emission as compared to other similar engines. In one example, engine cylinders may be deactivated.

Abstract: When a vehicle speed V is greater than a threshold value Vref when an engine speed difference ?N between an engine speed Ne and a target engine speed Ne* is greater than a threshold value Nref and a catalyst degradation flag Fc is 1, that engine speed Ne is brought to the target engine speed Ne* while the engine is kept firing. However, when the vehicle speed V is less than the threshold value Vref, a fuel cut is executed even if the engine speed difference ?N is greater than the threshold value Nref and the catalyst degradation flag Fc is 1. The threshold value Vref is set based on a catalyst bed temperature CT so control to suppress catalyst degradation can be continued for longer the more the operating state is such that the catalyst bed temperature CT is high and degradation of the catalyst is promoted.

Abstract: A cylinder deactivation system comprises a fuel injection module and a cold start control module. The fuel injection module injects a desired amount of fuel into a cylinder of an engine during engine cranking. The cold start control module maintains an intake valve and an exhaust valve associated with the cylinder in respective closed positions while the desired amount of fuel is injected when at least one of an air temperature and a coolant temperature is less than a predetermined cold start temperature.

Abstract: A method for determining degraded valve operation. According to the method, valve degradation can be determined from the duration of a spark event. This method allows for the determination of both intake and exhaust valve degradation.

Abstract: A method of controlling a cylinder deactivation system is disclosed. Information from one or more sensors is received by a control unit. The control unit compares the current values of a parameter with one or more prohibited ranges in order to determine if cylinder deactivation should be prohibited. The one or more prohibited ranges are discrete ranges, each with a lower limit and an upper limit.

Abstract: A method for a boosted engine including first and second injectors includes adjusting boost during a disabled condition of a first injector to compensate for lack of fuel injected from said first injector, said first injector supplying a fuel to a cylinder of said engine; and adjusting boost during a disabled condition of a second injector to compensate for lack of fuel injected from said second injector, said second injector supplying said fuel to said cylinder of said engine.

Abstract: A method and a device for operating an internal combustion engine are provided which make it possible to implement different deceleration requests to the internal combustion engine by switching over between half engine operation and full engine operation. A deceleration request is received particularly in a nonoperating state. A switchover is made between a first operating state and a second operating state of the internal combustion engine as a function of the magnitude of the deceleration request. The first operating state and the second operating state differ, in this instance, in the number of cylinders whose charge changing process is interrupted.

Abstract: A variety of methods and arrangements for controlling the operation of an internal combustion engine in a skip fire variable displacement mode are described. Generally, an engine is controlled to operate in a skip fire variable displacement mode. In the variable displacement mode, selected combustion events are skipped so that other working cycles can operate at better thermodynamic efficiency. More specifically, selected “skipped” working cycles are not fired while other “active” working cycles are fired. Typically, fuel is not delivered to the working chambers during skipped working cycles. In one aspect of the invention, a firing pattern is determined that is not fixed but the active working cycles are selected to favor the firing of working chambers that have recently been fired at least in part to reduce wall wetting losses.