Abstract: A method for calibrating post-injections in a fuel injection system, including a fuel accumulator, of an internal combustion engine, in particular of a motor vehicle, in which it is provided in particular that the calibration of at least one post-injection takes place based on the pressure drop in the fuel accumulator caused by the fuel injection.

Abstract: Various systems are provided for filtering EMI. In one example, a system comprises a poly-modal filter coupled to a load device, and a shield disposed between the load device and the poly-modal filter. The poly-modal filter comprises an EMI filter and a differential-common mode filter.

Abstract: A fuel injection control apparatus for an internal combustion engine having cylinders each of which includes a fuel injection valve and an intake valve, includes an intake valve controller, a parameter acquiring device, and an injection quantity correcting device. The intake valve controller performs an effective-compression-ratio reducing operation. The parameter acquiring device acquires a correction parameter including at least one of a rotational speed of the internal combustion engine, the valve closing timing of the intake valve, and an intake parameter indicating an intake fresh air amount flowing into the cylinders through an intake system. The injection quantity correcting device corrects a fuel injection quantity for the fuel injection valve in accordance with the acquired correction parameter to suppress variations among air/fuel ratios of air fuel mixtures in the cylinders while the intake valve controller performs the effective-compression-ratio reducing operation.

Abstract: The present disclosure teaches a method for operating an injector with piezoelectric direct drive of an injection system of an internal combustion engine. The method may comprise providing a current to the piezoelectric actuator at a first level, then quickly reducing the current for charging the piezoelectric actuator before or after the opening of the nozzle needle and before the mechanical impacting of the needle or the hydraulic equilibrium point of the needle, the current reduced to such an extent that the sum of the forces acting on the nozzle needle become approximately zero in the case of a small needle lift (part lift), and after reducing the current, supplying a low current in a constant or ramp-shaped fashion until a predetermined setpoint energy is reached.

Abstract: An injector bore insert includes a proximate portion adjacent to a combustion face and a distal portion including an upper threaded outer diameter. The injector bore insert further includes an angled conical collar, a remote threaded portion along an upper bore portion, a circumferential slot extending distally from approximately the combustion face, and one or more sealing regions. Each sealing region is positioned on the injector bore insert to facilitate sealing between the injector bore insert and a cylinder head of an internal combustion engine.

Abstract: The invented system adds some petrol fuel to the vehicle engine which runs with natural gas (CNG or LPG). It causes a simultaneous combustion of petrol and natural gas (CNG or LPG). This action decreases depreciation of engine, increases power of the engine and reduces fuel consumption in natural gas vehicles. The above-mentioned system consists of an innovative petrol holder storage, an electronically circuit, a relay, a lever micro switch and a petrol fuel injector. Whenever the accelerator pedal is pressed more than a certain amount, the system will be activated and command to inject petrol collected in the storage into the air manifold.

Abstract: Methods and systems are provided for adjusting operation of fuel injectors of an internal combustion engine to reduce injector ticking noise during direct injection fuel rail pressure release. The method includes first reducing a significant part of the direct injection fuel rail pressure via a mechanical high pressure pump relief valve and only if further pressure relief is required then intermittently activating the direct injector to inject in small amount of fuel. Due to the reduced frequency of activation and small pulse-widths, the impact force transmitted from injectors to cylinder head is small thereby reducing the objectionable ticking noise.

Abstract: An internal combustion engine includes a plasma ignition system having an in-cylinder dielectric barrier-discharge igniter, and a direct-injection fuel injector having an in-cylinder fuel nozzle. The fuel nozzle protrudes into the combustion chamber proximal to the igniter. A controller operatively connects to the internal combustion engine, the plasma ignition system and the fuel injection system. The controller controls the internal combustion engine at an air/fuel ratio that is lean of stoichiometry. The fuel injector injects a first fuel pulse prior to activation of the igniter, and then the igniter initiates a plasma energy pulse. The fuel injector is controlled to inject a second fuel pulse during the plasma energy pulse.

Abstract: A method for controlling continuously variable valve timing (CVVT), may include determining whether a CVVT control is started, detecting a position of a cam and a position of a crankshaft when the CVVT control is started, determining whether the cam is positioned at a locking position based on the positions of the cam and crankshaft, determining whether the cam is controlled to be positioned from the locking position to an advancing position or a holding position, when the cam is positioned at the locking position, and when the cam is controlled to be positioned from the locking position to the advancing position or the holding position and when a condition for performing the CVVT control is satisfied, determining whether a cam torque is negative and performing predetermined CVVT control after waiting a predetermined time when the cam torque is negative.

Abstract: A system includes a coolant management module that, determines whether an engine of a vehicle is off, determines, in response to a determination that the engine is off, whether a heater associated with the engine is on, receives one of a plurality of engine coolant temperature (ECT) measurements and a respective location associated with the received ECT measurement, and communicates the respective location and an instruction to direct engine coolant flow from the respective location to one of the heater and engine. The system also includes a coolant control module that selectively actuates one or more coolant control valves based on the respective location and the instruction.

Abstract: When the starting timing of a negative valve overlapping (NVO) period exists at the delayed-angle side of the starting timing of a first NVO period, fuel injection into a cylinder is not started; when the starting timing of an NVO period exists between the starting timing of the first NVO period and the starting timing of the second NVO period, fuel injection into the cylinder is started at a given timing that includes the exhaust top dead center; when the starting timing of an NVO period exists between the starting timing of the second NVO period and the starting timing of the third NVO period, fuel injection into the cylinder is started at a given timing that does not include the exhaust top dead center, and that exists at both the advanced-angle and delayed-angle sides of the exhaust top dead center.

Abstract: An ignition apparatus includes a blow-off determining unit 5b. The blow-off determining unit 5b determines, when the value ?I2 of the time derivative of a secondary electric current exceeds a predetermined threshold value Z during a determination period, that blow-off has occurred; the determination period is a predetermined time period ?T from the start of a spark discharge by a main ignition circuit 3. Further, when it is determined that blow-off has occurred during a main ignition (full-transistor ignition), it is controlled to perform a continuing spark discharge after the main ignition in a next cycle. Moreover, a secondary electric current command value in performing the continuing spark discharge is set to an electric current value that is obtained by adding a predetermined electric current value ? to the secondary electric current value I2x immediately before the occurrence of blow-off. Consequently, in the next cycle, it is possible to reliably prevent blow-off, thereby reliably preventing misfire.

Abstract: An apparatus and a method for charging an LPG fuel vehicle are provided to charge a LPG tank with LPG fuel by decreasing part of pressure in the LPG tank when pressure in the LPG tank, which stores the LPG fuel, is greater than charging pressure. That is, pressure in the LPG tank is decreased to be equal to or lower than charging pressure of a charger and the LPG tank with LPG fuel is charged more smoothly from the charger, by capturing part of the LPG fuel in the LPG tank and allowing the LPG fuel to be combusted in the engine when pressure in the LPG tank of the vehicle is greater than LPG charging pressure of the charger.

Abstract: A compression-ignition, opposed-piston engine using a low reactivity fuel as an ignition medium manages trapped temperature and trapped combustion residue within, and fuel injection into, the combustion chambers of the engine, and controls the compression ratio of the engine in order to realize reductions in emissions as well as improved fuel consumption efficiencies.

Abstract: The invention pertains to a valve, particularly an exhaust gas recirculation valve, said valve comprising a conduit (4) for circulating a cooling fluid having a wall (10) intended to come in contact with a circulation flange of said cooling fluid, said wall (10) having a plurality of grooves (16) and ribs (14) configured to limit contact between said flange and said wall (1) at said ribs (14), said ribs (14) being formed by machining and said grooves (16) being produced from molding the valve.

Abstract: An ignition device for an internal combustion engine includes optical focusing lenses, including a center optical focusing lens and satellite optical focusing lens. The center optical focusing lens focuses laser light from a laser generator to a center ignition point in a combustion chamber of a cylinder of the internal combustion engine. The satellite optical focusing lenses focus laser light from the laser generator to satellite ignition points in the combustion chamber of the cylinder of the internal combustion engine. The satellite optical focusing lenses are directionally angled away from the center optical focusing lens. A firing depth of the center ignition point is greater than a firing depth of the at least one satellite ignition point.

Abstract: An internal combustion engine includes a combustion chamber, a fuel injector injecting fuel into the combustion chamber, a cylinder, a piston having a crown and reciprocating in the cylinder, the crown being exposed to the combustion chamber, and an ignition delay enhancer prolonging an ignition delay of a fuel-air mixture in the combustion chamber. A ceramic member is disposed on at least a fuel injection port, to which fuel is injected from the fuel injector, of the crown of the piston.

Abstract: An intake air temperature estimation system includes: an adiabatically compressed intake air temperature computing unit that computes an adiabatically compressed intake air temperature based on an intake air temperature before compression, an intake air pressure before compression and an intake air pressure after compression; and an estimated intake air temperature computing unit that computes an estimated intake air temperature. The estimated intake air temperature computing unit variably sets a coefficient of the function in response to an amount of change per unit time in the intake air pressure after compression such that a followability of the estimated intake air temperature to the adiabatically compressed intake air temperature at the time when the amount of change is large is higher than a followability of the estimated intake air temperature to the adiabatically compressed intake air temperature at the time when the amount of change is small.

Abstract: A chamber for reducing operating noise of a purge control solenoid valve (PCSV) for an evaporative emission control system comprises a first housing into which operating noise of the PCSV enters. The first housing has an inner space to change a cross sectional area of an operating noise path or an operating noise transfer direction at least once. A second housing has an upper portion coupled to a lower portion of the first housing to transfer the operating noise outside. At least one end of the chamber in a length direction thereof is connected with a vapor hose which connects a canister collecting fuel evaporation gas generated from a fuel tank with the PCSV to deliver the fuel evaporation gas to an engine and through which the fuel evaporation gas flows.

Abstract: The present invention relates to a method for controlling the performance of an engine, comprising the steps detecting an ion current in the form of a first signal analysing said first signal to determine at least one property determining a knock index based on said first signal and preferably on said at least one property combining said knock index with a plurality of factors related to properties of the engine or the operation of the engine to arrive at a engine index, and comparing said engine index with a sensitivity map of the engine to determine a correction required to improve the operation of the engine, and correcting the operation of the engine in accordance with the correction determined. The invention also relates to a system for controlling the performance of an engine.