Abstract: The invention relates to the field of methods and devices for reducing the difference between normalized air-fuel ratio of the various cylinders compared with a predetermined value between 0.7 and 1.1, of the normalized air-fuel ratio in an internal combustion engine. The method and devices utilize the signal of the ionization current produced by a suitable device, modifying the quantity of fuel on the basis of the signal determined by means of the method in question in the invention.

Abstract: Methods and devices for controlling the normalized air-fuel ratio of an internal combustion engine, otherwise known, in technical terms, as Lambda. The present invention is based on the use of the ionization current released by a device positioned on each cylinder of the engine. This ionization current is measured by a Control Unit equipped with a low-pass filter and electronic means which implement the invention.

Abstract: The invention relates to the field of method and devices therefore for identifying which cylinder is in the compression phase in a gasoline indirect electronic injection internal combustion engine. The present invention develops over various phases, measuring the signal of the ionisation current of each cylinder in which the piston is located at the top dead centre, registering the average value thereof and comparing it with a predetermined value.

Abstract: The present invention falls into the field of methods and devices for identifying the various phases of the ionization current during combustion in a cylinder of an internal combustion engine. The present invention develops over various phases comprising the measurement of the ionization current signal and the sampling of the signal within predetermined windows, with the subsequent identification of the sample signal which is preceded by a signal whose derivative has a positive value and followed by a signal whose derivative has a negative value.

Abstract: Methods and devices for determining and putting in fuel into an internal combustion engine on the basis of an air-fuel ratio in proximity to the stechiometric value, based on the use of the ion current released by a device, positioned on each cylinder of said engine. This ion current is acquired by a Control Unit equipped by means, preferably electronic ones, which implement the invention, repeated continually for each engine cycle and for each cylinder, characterized in that the method develops over various phases.

Abstract: The invention relates to the field of methods and devices for reducing the difference between normalized air-fuel ratio of the various cylinders compared with a predetermined value between 0.7 and 1.1, of the normalized air-fuel ratio in an internal combustion engine. The method and devices utilize the signal of the ionization current produced by a suitable device, modifying the quantity of fuel on the basis of the signal determined by means of the method in question in the invention.

Abstract: The present invention falls into the field of methods and devices for identifying the various phases of the ionization current during combustion in a cylinder of an internal combustion engine. The present invention develops over various phases comprising the measurement of the ionization current signal and the sampling of said signal within predetermined windows, with the subsequent identification of the sample signal which is preceded by a signal whose derivative has a positive value and followed by a signal whose derivative has a negative value.

Abstract: The present invention fall into the field of methods and devices therefor for controlling the normalised air-fuel ratio of an internal combustion engine, otherwise known, in technical terms, as Lambda. The present invention is based on the use of the ionisation current released by a device positioned on each cylinder of said engine. This ionisation current is measured by a Control Unit equipped with a low-pass filter and electronic means which implement the invention.

Abstract: The invention relates to the field of method and devices therefore for identifying which cylinder is in the compression phase in a gasoline indirect electronic injection internal combustion engine. The present invention develops over various phases, measuring the signal of the ionisation current of each cylinder in which the piston is located at the top dead centre, registering the average value thereof and comparing it with a predetermined value.

Abstract: The invention relates to the field of method and devices for determining and putting in fuel into an internal combustion engine on the basis of an air-fuel ratio in proximity to the stoichiometric value. The present invention is based on the use of the ion current released by a device, positioned on each cylinder of said engine. This ion current is acquired by a Control Unit equipped by means, preferably electronic ones, which implement the invention, repeated continually for each engine cycle and for each cylinder, characterized in that said method develops over various phases.

Abstract: The invention relates to the field of methods and devices for evaluating the knocking inside every cylinder of an internal combustion engine by making advantageous use of the ionisation current generated during the combustion of the fuel in each cylinder of said engine. The invention develops over various phases, each of which is repeated continually for each cycle of said combustion engine and is characterised by the fact that ionisation current values are selected during determined lengths of time, and said values are entered in a high-pass filter, the values determined by said filter then being squared and the value Vd calculated, said value being the relation between the value of the sum of the squares of said values obtained by said filter and a known normalisation coefficient, thus generating the spark at the spark plug in each cylinder on the basis of said value Vd.

Abstract: The invention provides a method of compensating for the error of a signal indicative of the mass of air flow output from an air mass flow sensor for an internal combustion engine, the method comprising deriving an air mass flow value from an air mass flow sensor output, calculating a compensated air mass flow value based on the air mass flow value and a compensation value, calculating an estimated air mass flow value from engine operating parameter values, calculating a new compensation value based upon the compensated air mass flow value and the estimated air mass flow value and using the new compensation value for subsequent calculations of the compensated air mass flow value.

Abstract: The invention provides a method of compensating for the error of a signal indicative of the mass of air flow output from an air mass flow sensor for an internal combustion engine, the method comprising deriving an air mass flow value from an air mass flow sensor output, calculating a compensated air mass flow value based on the air mass flow value and a compensation value, calculating an estimated air mass flow value from engine operating parameter values, calculating a new compensation value based upon the compensated air mass flow value and the estimated air mass flow value and using the new compensation value for subsequent calculations of the compensated air mass flow value.

Abstract: A method for controlling the titre of the exhaust gases in an internal combustion engine. An oxygen sensor provides a signal indicative of a titre (lambda) of the exhaust gases. The method includes selecting respective values of operating parameters on the basis of an objective lambda value and engine-related parameters, calculating a correction parameter on the basis of the respective values of the operating parameters and the lambda signal and calculating an adjustment quantity of fuel on the basis of the correction parameter and a nominal quantity of fuel. The method further includes selecting respective values of a first and a second of the operating parameters, determining magnitudes as a function of the respective values of the first and the second operating parameters and determining a third of the operating parameters as a function of the first and the second operating parameters and a mean value of the correction parameter.

Abstract: Method for controlling the injection and ignition in a direct-injection endothermic engine, in order to accelerate heating of a catalytic converter , which is disposed along the exhaust pipe of the engine, The method comprising the steps of executing, during a single cycle of the engine, and for each cylinder of the engine itself, at least a first injection of fuel, during suction stroke and/or compression stroke of the cylinder itself, in order to supply a weak mixture; priming combustion in each cylinder, at a priming moment which is pre-determined such that the combustion in each cylinder generates the same torque; and executing, in at least one cylinder of the engine, a second injection of fuel, during the exhaust stroke of the cylinder itself, such that the ratio of air/fuel of the mixture as a whole, which is supplied to the cylinder during suction stroke, compression stroke, expansion stroke and exhaust stroke, is close to the stoichiometric value; the fuel which is injected in the said second injectio

Abstract: A method for controlling the titre of the exhaust gases in an internal combustion engine, in a control system comprising a control unit and oxygen sensor means, disposed along an exhaust duct of the engine and supplying a signal indicative of a titre of the exhaust gases; the control unit comprising a table, a controller and a correction and actuation block, the table receiving as input a plurality of engine-related parameters and an objective titre value and supplying as output a plurality of operating parameters; the controller receiving as input the operating parameters and the signal and supplying as output a correction parameter.

Abstract: A method for controlling the titre of the air-fuel mixture in an internal combustion engine provided with at least two cylinders, in which the exhaust gas present in a common exhaust manifold is analyzed in order to measure at least two successive values of the overall air-fuel ratio of the cylinders; a value of the air-fuel ratio of a final combusted cylinder being estimated by carrying out a linear composition of the two successive values of the overall air-fuel ratio of the cylinders and the value of the air-fuel ratio of the final combusted cylinder being attributed to a first of the cylinders and being used to correct a titer of the air-fuel mixture introduced into the first cylinder.

Abstract: A method for controlling the titer of the air-fuel mixture in an internal combustion engine provided with at least two cylinders, in which the exhaust gas present in a common exhaust manifold is analyzed in order to measure at least two successive values of the overall air-fuel ratio of the cylinders; a value of the air-fuel ratio of a final combusted cylinder being estimated by carrying out a linear composition of the two successive values of the overall air-fuel ratio of the cylinders and the value of the air-fuel ratio of the final combusted cylinder being attributed to a first of the cylinders and being used to correct a titer of the air-fuel mixture introduced into the first cylinder.

Abstract: Method of controlling the direct injection of fuel into a combustion chamber of an internal combustion engine, according to which, in order to effect injection in relation to a first stroke of the cylinder starting from a dead center, the following steps are performed: estimating during a stroke of the cylinder preceding the first stroke the pressure which will be present in the suction manifold at the first dead center, estimating an injection advance for the injection on the basis of the estimation of the pressure in the suction manifold, detecting the pressure in the fuel manifold, estimating the mean pressure which will be present in the chamber during the injection on the basis of the estimates effected in the preceding steps and on the basis of a function representative of the course of the pressure in the combustion chamber under reference operating conditions of the engine, estimating the mean flow rate of the injector during the injection on the basis of the pressure difference defined by the pressur