Abstract: A fuel system includes a plurality of fuel injectors connected to a common drain conduit, and a plurality of isolation valve assemblies each positioned fluidly between the common drain conduit and one of the plurality of fuel injectors. Each isolation valve assembly includes a valve member movable between a closed position to block an injection control valve assembly in the fuel injector from the common drain conduit, and an open position, and a biaser biasing the isolation valve member toward the closed position such that fuel injectors are isolated from fluid pressure pulses produced by nozzle check actuation to limit cross-talk among the fuel injectors.

Abstract: A method of compensating for fuel injection deviations of injectors includes: in a case of a low flow rate operating range, learning cylinder-specific lambda deviations regarding cylinder-specific engine roughness deviations using a characteristic map defining a relationship between engine roughness deviations and lambda deviations; calculating cylinder-specific amounts of injection compensation necessary to remove the cylinder-specific lambda deviations; and compensating for amounts of injection of injectors a by adding the cylinder-specific amounts of injection compensation to cylinder-specific target amounts of injection.

Abstract: Systems and methods for determining whether an authorized or genuine filter element is installed in a filtration system are described. The authorized filter determination may be based on radio frequency identification (“RFID”) technology. RFID readers with antennas in the monitored filter systems read the RFID tag information from the installed filter elements and feed any detected information into the filter monitoring system. The filter monitoring system or a remote diagnostic system analyzes the returned data (or absence thereof) to determine if a genuine (i.e., authorized, OEM approved, etc.) filter element is installed or not.

Abstract: Disclosed is a method for determining reliability regarding misfire determination of cylinders of an engine, comprising detecting a pressure in an exhaust manifold for a set of operation parameters comprising a certain range of crank angles for a certain engine load and certain engine speed so as to, for an actual cylinder setup of the engine, create pressure sample value patterns for combustion and misfire conditions. A template course is created for the thus created pressure sample value patterns comprising a set of sample points. The pressure for the created template courses is normalized at a desired crank angle. Difference values are determined based upon differences between sample points and corresponding detected and the normalized pressure values. The determined difference values are summarized so as to determine whether a predetermined share of the summarized difference values lies above or below a predetermined threshold value indicating reliability regarding misfire determination.

Abstract: Methods and systems are provided for operating a variable displacement engine that includes a knock control system. Engine background noise levels for detecting engine knock may be the basis for determining whether or not the engine is operating in a cylinder deactivation mode. Further, select variable engine displacement modes may be avoided so that engine background noise level changes may be reduced to improve engine knock detection.

Abstract: An inventive ignition coil has a transformer that includes a primary coil, a secondary coil and a core formed from stacked metal sheets. A plastic frame holds the sheets. A housing surrounds an interior in which the transformer is arranged and the interior is sealed with an electrically insulating casting compound. The housing comprises an interior wall bounding bounds a compartment in which a part of the core is arranged, the part of the core being outside the primary coil and the secondary coil.

Abstract: Methods and systems are provided for increasing engine power while reducing vehicle emissions and engine system degradation. In one example, a method may include, responsive to an engine load reaching a threshold load, increasing engine torque by increasing an amount of boost without providing exhaust gas recirculation (EGR), and, responsive to the engine torque reaching a first threshold torque, increasing the engine torque by increasing an EGR rate over a plurality of engine cycles while further increasing the amount of boost. In this way, cooling effects from the EGR enable engine air flow, and thus engine power, to be increased while engine vibrations and heat-related exhaust component degradation are decreased.

Abstract: Methods and systems are provided for increasing engine power via partial engine enrichment and exhaust gas recirculation. In one example, a method may include enriching a first set of engine cylinders, enleaning a second set of the engine cylinders, and operating a third set of the engine cylinders at stoichiometry, exhaust gas from all of the engine cylinders producing a stoichiometric mixture at a downstream emission control device, and providing exhaust gas recirculation (EGR) to an intake passage of the engine from the first set of cylinders. In this way, cooling effects from the partial enrichment and the EGR enable engine air flow, and thus engine power, to be increased while an efficiency of the emission control device is maintained, thereby decreasing vehicle emissions.

Abstract: A method for monitoring crankcase pressure, in which a learning curve is calculated according to a target-actual deviation of the crankcase pressure, the target crankcase pressure is adjusted according to the learning curve, and a limit curve is calculated according to the target crankcase pressure. The actual crankcase pressure is monitored for exceedance of the limit curve. After an engine start, upon identification of a steady-state operation of the internal combustion engine, the actual crankcase pressure is compared with a limit value and, if the limit value is identified as being exceeded, the learning curve and, as a result, the limit curve are reset to their initial values.

Abstract: Present application discloses fuel supply device which includes: fuel injection valves respectively arranged on center axes of cylinders, fuel injection valves being configured to inject fuel into the cylinders; fuel distribution portion configured to distribute fuel to fuel injection valves; and fuel supply tubes configured to form supply paths for fuel from fuel distribution portion to fuel injection valves. Fuel distribution portion includes connection portions arranged in arrangement direction so as to be connected to fuel supply tubes. Connection portions include pair of reference connection portions situated at positions distant from each other in arrangement direction by distance between respective bore center axes of cylinders. Fuel supply tubes include pair of fuel supply tubes respectively connected to pair of reference connection portions and two fuel injection valves on two cylinders arranged adjacently to each other. Pair of fuel supply tubes have a common shape.

Abstract: An autonomous vehicle and a method of controlling the vehicle are provided. The vehicle has an accessory powered by an engine with a compressor. An ejector has an inlet positioned to receive compressed air from the air intake system downstream of the compressor, and an outlet positioned to provide compressed air into the air intake system upstream of the compressor. A check valve is positioned between and fluidly connects the canister purge valve and the ejector. A controller is configured to stimulate boosted operation of the engine by activating the accessory and increasing a torque output of the engine to open the second check valve.

Abstract: A precombustion chamber gas engine includes a main-chamber forming portion forming a main combustion chamber, a precombustion-chamber forming portion forming a precombustion chamber communicating with the main combustion chamber via nozzle holes, and an ignition device disposed in the precombustion chamber and having an ignition portion spaced from the main chamber central axis at a predetermined distance. In a plan view, the precombustion chamber has a near-ignition region including the ignition portion and a far-ignition region opposite to the near-ignition region separated by a borderline passing through the precombustion chamber central axis and perpendicular to a straight line passing through the precombustion chamber central axis and the ignition portion. The cross-sectional area of a specific near nozzle hole which is at least one nozzle hole in the near-ignition region is smaller than the cross-sectional area of a specific far nozzle hole which is at least one nozzle hole in the far-ignition region.

Abstract: A method of controlling an air-fuel ratio in a pre-ignition (PI) situation, may include: monitoring, by a PI detector, whether PI occurs in a cylinder of a plurality of cylinders of an engine; and when the PI occurs in the cylinder of the plurality cylinders, controlling, by a controller, an air-fuel ratio of the cylinder in which the PI occurs to be smaller than a theoretical air-fuel ratio, and controlling an air-fuel ratio of a remaining cylinder of the plurality of cylinders in which PI does not occur to be larger than the theoretical air-fuel ratio.

Abstract: Systems and methods are provided for determining and correcting air/fuel imbalance between cylinders of an internal combustion engine. A deactivation strategy is determined and implemented. An evaluation is made of whether the engine is operating with an air/fuel imbalance between cylinders. When an imbalance is identified, an alternate deactivation strategy is implemented. Based on outcomes of the alternate deactivation strategy, a source cylinder of the air/fuel imbalance is identified, and fuel flow to the source cylinder is corrected.

Abstract: Occlusion diagnosis of a vent passage is executed with high accuracy based on an estimated value of the volume of a sealed space. An occlusion diagnosis device includes a diagnosis unit for the diagnosis. An occlusion diagnosis unit of the diagnosis unit executes the occlusion diagnosis, based on whether or not an estimated volume of a sealed space of a fuel-vapor sealing system exceeds a volume threshold. The occlusion diagnosis determines that the vent passage is suspected of being occluded if the estimated volume is equal to or less than the volume threshold, while diagnoses that the vent passage is not occluded if the estimated volume exceeds the volume threshold. If it is determined that the vent passage is suspected of being occluded, the occlusion diagnosis unit causes the occlusion diagnosis of the vent passage to remain incomplete until a cumulative exhaust amount of fluid exceeds an exhaust amount threshold.

Abstract: An engine controller is provided. A second calculation process calculates an intake air amount without using an output of an air flow meter. A second determination process determines whether an intake air pulsation in an intake passage is great without using the output of the air flow meter. When the intake air pulsation is determined to be great by at least one of a first determination process and the second determination process, a calculation method switching process selects the calculated value of the intake air amount obtained by the second calculation process as a calculated value of the intake air amount used to determine an operation amount of an actuator.

Abstract: An ignition control system and method for an engine having a two-step variable valve lift (VVL) system utilizes an ignition control system comprising a plurality of spark plugs each configured to generate one or more ignition strikes during a combustion event in a respective cylinder of the engine and a controller configured to detect a low-to-high or high-to-low lift mode transition of the VVL system and, in response to detecting the low-to-high or high-to-low lift mode transition of the VVL system, command the ignition control system to perform multi-strike ignition for at least one combustion event, wherein commanding the multi-strike ignition mitigates or eliminates at least one of engine torque variations and increased engine emissions resulting from poor combustion quality caused by residual exhaust components within the cylinder from a previous combustion event prior to the low-to-high or high-to-low lift mode transition of the VVL system.

Abstract: A fuel supply device includes a pump unit, a lid unit and a strut linking unit. The pump unit is located on a bottom of a fuel tank for discharging fuel from the fuel tank to an outside thereof. The lid unit is attached to an upper wall of the fuel tank to close an opening formed in the upper wall. The lid unit has a fuel discharge port. The strut linking unit connects the lid unit to the pump unit. The strut linking unit includes an upper-side strut member, which is formed as an independent component from the lid unit. The strut linking unit includes a lower-side strut member, which is movably connected to the upper-side strut member in a vertical direction. The upper-side strut member is connected to the lid unit by a snap-fit connection. A connecting portion between the upper-side strut member and the lid unit has a stress concentration portion, which is preferentially damaged when an external force is applied to the strut linking unit.

Abstract: A regulating flap, especially exhaust flap for the exhaust gas stream of an internal combustion engine, includes a flap body (12), a flap diaphragm (16) carried on a pivot shaft (14) that is rotatable about a pivot axis (S) in the interior of the flap body (12). A pivot drive (20) has a drive element (30) to be coupled with the pivot shaft (14). A fixing device (40) fixes the pivot drive (20) in relation to the flap body (12). The fixing device (40) includes a bayonet fastener (38).

Abstract: An internal combustion engine including a fuel reformation unit that generates reformed fuel based on liquid fuel and higher in octane rating than the liquid fuel and introduces the generated reformed fuel to an output cylinder. The fuel reformation unit includes a first fuel reformer that includes a reciprocal mechanism where a piston reciprocates in a cylinder, a second fuel reformer that includes a reformation catalyst, and a reformed gas passage that connects the first and second fuel reformers together. First reformed gas discharged from the first fuel reformer is introduced to the second fuel reformer through the reformed gas passage.