Abstract: A diagnostic system for an engine includes: a plurality of cylinders, in-cylinder injectors, port injectors and an electronic control unit. The electronic control unit configured to make an abnormality diagnosis of an air-fuel ratio due to the in-cylinder injectors and then to make an abnormality diagnosis of the air-fuel ratio due to the port injectors. The electronic control unit is configured to make an abnormality diagnosis of the air-fuel ratio due to the in-cylinder injectors in an operating situation in which fuel is injected from only the in-cylinder injectors, and to make an abnormality diagnosis of the air-fuel ratio due to the port injectors by increasing a ratio of an injection amount of the port injectors when the electronic control unit has diagnosed that there is an abnormality of the air-fuel ratio in an operating situation in which fuel is injected from both the in-cylinder injectors and the port injectors.

Abstract: Various methods and systems are provided for an exhaust gas recirculation system. In one example, an exhaust gas recirculation cooler includes an exhaust gas inlet and an exhaust gas outlet spaced from the exhaust gas inlet; a plurality of cooling tubes disposed between the exhaust gas inlet and exhaust gas outlet; and a baffle positioned proximate to the exhaust gas inlet and interposed between the plurality of cooling tubes and the exhaust gas inlet, where the baffle directs exhaust gas entering the EGR cooler through the exhaust gas inlet to the plurality of cooling tubes in a defined path.

Abstract: A method is provided for setting combustion parameters of an internal combustion engine operated with liquefied natural gas, the combustion parameters being sensed during operation of the internal combustion engine and being stored upon shutoff of the internal combustion engine. Also provided is a controller for carrying out the method. Provision is made that during a stoppage of the internal combustion engine, the duration of the stoppage, the ambient temperature and/or tank temperature, and the pressure in a liquefied gas tank are sensed; the influence thereof on a required adaptation of the combustion parameters that are to be set is identified from a characteristics diagram; and from the stored combustion parameters and the adaptation, initial combustion parameters are identified and are used upon startup of the internal combustion engine in order to control it.

Abstract: A device and method for adjusting a fuel supply advance angle of a multi-cylinder diesel engine includes a gear chamber, a connecting disc and a fuel pump, wherein the gear chamber and the connecting disc are in the diesel engine, and the fuel pump is at a left end surface outside the gear chamber. A main shaft end of the fuel pump extends into the gear chamber. A right end surface of the connecting disc connects to a timing gear. A right end surface of the timing gear has three penetrating circular-arc waist-shaped holes. Annular sizing blocks are arranged on the waist-shaped holes. A penetrating circular hole is at a tail end of the waist-shaped holes. The circular hole is provided with a T-shaped nut. A support screw is arranged in the T-shaped nut, and the screw head of the support screw is jacked against the annular sizing block.

Abstract: A method for energy ignition management of a spark-ignition engine includes receiving, by a controller, at least one ignition energy characteristic to affect control of at least one combustion cylinder. The method further includes controlling the at least one combustion cylinder via the controller. Controlling the at least one combustion cylinder via the controller includes adjusting the at least one ignition energy characteristic in response to at least one operating condition of the engine. The at least one ignition energy characteristic is a magnitude of one of a current or voltage of spark energy.

Abstract: An engine of a stop/start vehicle, after the engine has been automatically stopped, may be commanded to automatically restart in response to detecting that the vehicle is in a turn lane based on traffic data in a vicinity of the vehicle such that the engine is automatically restarted before a brake pedal is released and a steering wheel is turned.

Abstract: A cooling apparatus for an engine includes a main circuit, a warm-up circuit, a coolant passage, a coolant pump, a pre-branching passage, a coolant temperature sensor and an agitator. The warm-up circuit allows a coolant to bypass the main circuit. The coolant passage is provided inside an engine body. The coolant pump is configured to cause the coolant to flow through the coolant passage. The pre-branching passage is communicated with an outlet side of the coolant passage, and communicated with the main circuit and the warm-up circuit. The coolant temperature sensor is configured to detect a coolant temperature inside the pre-branching passage. The agitator is disposed downstream of the coolant temperature sensor in a direction of coolant flow when the coolant pump is operating. The agitator is disposed at a boundary between the pre-branching passage and the main circuit or in a vicinity of the boundary.

Abstract: A ducted combustion system is disclosed. The ducted combustion system may include a combustion chamber, which is defined as an enclosure bound at a first end by a flame deck surface of a cylinder head of an internal combustion engine and bound at a second end by a piston top surface of a piston disposed within the internal combustion engine. The system may further include a fuel injector, having at least one orifice, injecting fuel into the combustion chamber as at least one fuel jet. The system may further include at least one Venturi duct disposed within the combustion chamber between the flame deck surface and the piston top surface, the at least one Venturi duct being disposed such that each of the at least one fuel jet, at least partially, enters the at least one Venturi duct structure upon being injected into the combustion chamber.

Abstract: An internal combustion engine system includes: an in-cylinder pressure sensor; a crank angle sensor; and a seal portion that seals a space between an outer face of a housing and a wall surface of a cylinder head. A slope that is a ratio of the amount of decrease in a heat release amount relative to the amount of increase in a crank angle is calculated in a period during an expansion stroke from a combustion end point until an opening timing of an exhaust valve. The existence or nonexistence of an abnormality in the sealing function of the seal portion is determined based on whether or not a ratio of the amount of decrease in the slope to the amount of increase in an engine speed is greater than a threshold value.

Abstract: Various technologies presented herein relate to enhancing mixing inside a combustion chamber to form one or more locally premixed mixtures comprising fuel and charge-gas with low peak fuel to charge-gas ratios to enable minimal, or no, generation of soot and other undesired emissions during ignition and subsequent combustion of the locally premixed mixtures. To enable sufficient mixing of the fuel and charge-gas, a jet of fuel can be directed to pass through a bore of a duct causing charge-gas to be drawn into the bore creating turbulence to mix the fuel and the drawn charge-gas. The duct can be located proximate to an opening in a tip of a fuel injector. The duct can comprise of one or more holes along its length to enable charge-gas to be drawn into the bore, and further, the duct can cool the fuel and/or charge-gas prior to combustion.

Abstract: Methods and devices are provided for controlling an engine provided with a continuously variable valve timing (CVVT) device disposed on an intake valve side, and with a continuous variable valve duration (CVVD) device and a continuously variable valve timing (CVVT) disposed on an exhaust valve side according to an exemplary form of the present disclosure. A method may include classifying a plurality of control regions depending on an engine speed and an engine load, and based upon which of the plurality of control regions is a control region of the engine, controlling opening and closing timing of the intake valve, controlling opening and closing timing of the exhaust valve, and controlling open duration of the exhaust valve.

Abstract: A system and method for measuring fuel pressure decreases in a fuel accumulator caused by a fuel injector of an internal combustion engine is provided. The system includes the ability to stop a fuel flow to a fuel accumulator of the engine. Pressure signals are transmitted to a control system of the engine until the fuel pressure in the fuel accumulator drops by a predetermined amount, at which time fuel flow is re-enabled. The pressure signals are then analyzed to determine the amount or quantity of fuel delivered by each fuel injector. The system and method maintain engine and emissions performance by limiting the amount of fuel pressure decrease in the fuel accumulator.

Abstract: A method and a device for supplying fuel into a combustion chamber of a cylinder of an internal combustion engine, in which an air-fuel mixture is supplied to the cylinder via at least two intake sections, which are connected to the cylinder via an intake valve, and each of the intake sections is assigned an injector, fuel being injected into the intake sections in at least intermittently asynchronous manner.

Abstract: Methods and systems are described for monitoring air/fuel imbalance in cylinders of an engine. Engine speed signals are sampled and then run through a notch filter set to the sampling frequency. Based on a first frequency content of the resulting filtered engine speed, cylinder imbalance is detected and addressed.

Abstract: A two-stage changeover valve is provided in a vaporized fuel passage connected between a fuel tank and a canister. A valve member is movably accommodated in a fluid passage formed in a valve housing. A valve seat is formed at an inner peripheral wall of the valve housing, so that the valve member is operatively seated on the valve seat. A restricted communication hole is formed in the valve member, so that an upstream side and a downstream side of the valve member are communicated with each other, even when the valve member is seated on the valve seat. The restricted communication hole is formed in a Laval-nozzle shape, so that vaporized fuel passing through the restricted communication hole is accelerated. As a result, a process for depressurizing inner pressure of the vaporized fuel in the fuel tank can be carried out in a shorter time.

Abstract: Methods and systems are provided for generating vacuum via an ejector arranged in a compressor recirculation flow path and an aspirator arranged in a throttle bypass path, where a suction port of the ejector is coupled with a canister purge valve having two outlet ports. In one example, the canister purge valve may include only a single flow restriction, the flow restriction arranged in a path coupling a fuel vapor purge system with the intake manifold when a solenoid of canister purge valve is open, such that a path coupling the fuel vapor purge system with the suction port of the ejector does not include any flow restrictions upstream of the suction port.

Abstract: A fuel distributor, which is used, in particular, for fuel injection systems of mixture-compressing, internal combustion engines having externally supplied ignition, includes a distributor pipe, a first holder and at least one second holder. The distributor pipe has a longitudinal axis. In this connection, the first holder and the second holder are situated at the distributor pipe so as to be axially set apart from one another with respect to the longitudinal axis. The distributor pipe is designed to allow axial length compensation. It is also possible for at least one holder to be designed to allow axial length compensation.

Abstract: Methods and systems are provided for addressing pre-ignition that may be induced in response to actions taken to mitigate a cylinder misfire. An amount of engine load limiting applied may be adjusted to reduce the likelihood pre-ignition while also addressing component over-temperature issues. By limiting an engine load while shutting off fuel in a misfiring cylinder, and while combusting a lean air-fuel mixture in the remaining cylinders, pre-ignition induced by the misfire-mitigating lean combustion conditions can be reduced.

Abstract: Methods and systems for operating an engine during conditions where ambient humidity changes over time are presented. In one non-limiting example, an engine air flow limit is adjusted to increase engine air flow during high humidity conditions such that an engine may provide equivalent torque output during the high humidity conditions as compared to when the engine is operated during low humidity conditions.

Abstract: Embodiments for controlling fuel vapors are disclosed. In one example, a method comprises during a purge of a fuel vapor canister, adjusting a heater of the fuel vapor canister based on a rate of a purge flow exiting the fuel vapor canister and a concentration of hydrocarbons released from the fuel vapor canister. In this way, a fuel vapor canister purge efficiency may be increased.