Abstract: In a fuel injection apparatus of an internal combustion engine comprising a fuel injector, an intake valve device for opening and closing an intake port, and an intake air flow control device arranged in an upstream side of the intake valve device, a fuel injection is synchronized with an intake stroke of the engine. A fuel spray is oriented to an inner wall face which is positioned in an opposite side to an inner wall face of a cylinder heads in a fuel injector side and the fuel spray is transported by an air flow having a strong fluidization which is entered from the intake air control device. In a port injection lean burn engine, an adhesion to the wall face according to the fuel spray can be reduced, and a quality and a formation state of an air-fuel mixture in a cylinder can be improved.

Abstract: In an engine control apparatus for a multicylinder engine including an injection pulse width-setting unit for setting an injection pulse width for an injection valve situated in each cylinder based on signals output from an engine operational condition-detection system situated in a vehicle; the injection pulse width-setting unit includes an engine starting injection pulse-setting unit for setting an injection pulse width for each cylinder in the engine starting operation, and the engine starting injection pulse-setting unit includes an injection pulse width-correction unit for determining a correction coefficient to a basic injection pulse width, for each cylinder at each cycle.

Abstract: The present invention relates to a cylinder identifying device to identify the cylinder or cylinders of a running internal combustion engine in a specific stroke, and more particularly to a cylinder identifying device for internal combustion engines suitable for automotive use. A signal plate for detecting revolutions, fitted to the camshaft, is provided with two signal generating means per cylinder; a cylinder identifying signal is added before said two signals; and two sensors are so arranged as to have a phase difference from the detection of said projection. Bit patterns are prepared from the outputs of these two sensors correspondingly to individual cylinders, and cylinder identification is accomplished according to the combination of these patterns.

Abstract: A control apparatus for a multi-cylinder engine of direct injection, is composed of a pressure change estimation part for estimating in advance the pressure in each cylinder, from the fuel injection start to the fuel injection end, a part for calculating the difference between the estimated pressure in the cylinder and the pressure of fuel, and a part for calculating a supposed decreased amount of injected fuel, caused by the decrease of the difference between the pressure in the cylinder and the pressure of fuel, in a compression stroke. A part for determining an additional fuel injection time interval to a base fuel injection time interval also determined by the control apparatus, compensates the supposed decreased amount of injected fuel.

Abstract: An ignition timing controller for an automobile in which at least two reference ignition point signals are established for each cylinder, and the ignition timing is set according to the reference ignition point signal that is closer to the target ignition timing.

Abstract: Data for engine conditions such as engine speed (r.p.m.), a flow rate of air taken in each of a plurality of cylinders of the engine, etc. are detected by various sensors; an amount of fuel to be injected into each engine cylinder is calculated repeatedly on the basis of the detected data at fixed time intervals; the calculated amount of fuel is injected into each engine cylinder, wherein the calculated fuel injection amount is injected each cylinder at an optimum fuel injection time in an engine cycle and the calculated fuel amount can be renewed at least once in a time from starting of fuel injection until completion of the fuel injection in an load operation of the engine in which an engine load is larger than in idling.

Abstract: A control system for controlling the full current of a generator for a vehicle having an internal combustion engine operates to control the field current so as to change the output power of the generator. A storage unit is charged by the generator; a field current control unit for controlling the field current of the generator detects the output generated by the storage unit; and an engine control unit to which operation parameters of the internal combustion engine are applied controls at least one of a fuel supply and an ignition timing for the internal combustion engine. The engine control unit further operates to determine a kind of change of load being applied to the internal combustion engine when the load has changed and to control the field current of the generator in accordance with a predetermined control pattern corresponding to the kind of change of the load.

Abstract: An altitude decision system and engine operating parameter control system using the same for accurately detecting and correcting for altitude uses three signals, viz, the signal from an engine revolution number sensor, the signal from a throttle sensor for detecting the angle of opening of a throttle valve, and a fundamental fuel injection pulse width signal which is computed by engine operational parameter-computer from inputted signals from a mass air flow sensor and the revolution number detection sensor. Having accurately derived the altitude, the fuel injection pulse rate, the intake air flow and the ignition timing are corrected.

Abstract: A method of an electronic engine control for an internal combustion engine having a plurality of cylinders, wherein the very same air fuel ratio feed back coefficient obtained at a predetermined sequential timing which has been used for calculating the amount of fuel to be injected to a specific cylinder is also used for correcting timing of ignition for the same cylinder which follows immediately after the calculated amount of fuel has been injected into the specific cylinder, thereby the engine torque fluctuation is effectively suppressed, stability of engine operation during idling operation is improved and the surge during a low speed running is prevented.

Abstract: A method and a controller for supplying a fuel to a plurality of cylinders of an internal combustion engine, in which engine operation conditions including the operating temperature of the engine are detected by various sensors attached to the engine and by using a microcomputer, and the fuel is successively supplied by being injected to the engine cylinders based on the detected engine operation conditions. The timing of fuel injection into each of the plurality of cylinders is shifted from an exhaust stroke period to a suction stroke period according to the operating temperature of the engine among the detected engine operation conditions.

Abstract: In an engine control system of the type in which engine control data is calculated for each of a plurality of cylinders, rotation angular speeds of the crank shaft are sequentially detected as individual pistons of the plurality of cylinders take an identical, predetermined stroke position, for example, top speed position and rotation speed data and control data are calculated on the basis of the detected rotation angular speed.

Abstract: A method of detecting the condition of combustion in each cylinder of an internal combustion engine while monitoring a variation in rotation of a crankshaft in the engine for each cylinder, in which the degree of irregular combustion is judged based on the magnitude of the rotational variation, and/or in which the condition of combustion in a succeeding cylinder is judged based on the difference between rotational variations within one combustion period, of adjacent cylinders, and/or in which the rotational ascending rate within one combustion period, of each cylinder is detected to judge the condition of combustion in the cylinder based on the dropping state of the rotational ascending rate, and/or in which the rotational angular acceleration within one combustion period, of each cylinder is detected to thereby judge that a predetermined cylinder is in a condition of irregular combustion when the quantity of the variation in rotational angular acceleration between adjacent cylinders exceeds a predetermined v

Abstract: In a multi-cylinder engine control method and a control apparatus therefor, rotating speeds of the multi-cylinder engine at explosion strokes of the respective cylinders are detected for estimating combustion pressures in the respective cylinders, and deviations of the combustion pressures in the cylinders are derived from the estimated combustion pressures in the respective cylinders, so that ignition timings or fuel amounts supplied to the respective cylinders are regulated in response to the derived deviations of the combustion pressures.

Abstract: With regard to the engine control method which determines control variables for the individual cylinders of a multicylinder internal combustion engine independently of one another, this specification discloses improved control method and apparatus whereby the optimum control variables are determined. The control method of a multicylinder internal combustion engine according to this invention includes a step of detecting data representing the operating condition of the engine, a step of storing data, a step of determining a first control variable at a certain time of a certain stroke of each cylinder according to the stored data, and a step of determining a second control variable at a later time in the stroke according to the same stored data.

Abstract: A basic fuel injection pulse width value indicating an individual performance of an injector and an intake air flow amount value indicating an individual performance of an air flow sensor are prepared so as to memorize in plural memory areas in a store table, respectively. Deviations due to the basic fuel injection pulse width and deviations due to the intake air flow amount are memorized in the memory areas as learning values for controlling an air-fuel ratio, respectively. A corrected fuel injection pulse width is requested under the memorized learning values. An estimation learning is carried out at a first time learning. A first time learning value of the basic fuel injection pulse width is memorized in a whole area of the store table, and a first time learning value of the intake air flow amount is memorized in a corresponding area of the store table.

Abstract: An ignition timing control unit for an internal combustion engine is constructed such that a predetermined amount of correction for the ignition timing of the engine is set beforehand in accordance with directions of change in the number of revolutions of the engine so that, during a predetermined period of time after the detection of an operation to accelerate the engine, the predetermined amount of correction for the ignition timing is added to standard ignition timing of the engine to suppress the change in the number of revolutions of the engine.

Abstract: A detection processing of a rotational number of an engine is executed periodically in synchronism with a rotation of the engine. A calculation processing of an ignition timing correction amount (.DELTA.IGN) is executed periodically in every predetermined time independently on the rotational number detection of the engine. After the engine is accelerated, the ignition timing control of the engine is executed based on the ignition timing correction amount.

Abstract: An ignition timing adjusting apparatus of an internal combustion engine is provided so as to suppress the vibration of the body of a vehicle when it is accelerated. This is achieved by obtaining a first ignition timing compensation magnitude determined on the basis of the revolution speed fluctuation of the internal combustion engine and a second ignition timing compensation magnitude determined on the basis of the engine load condition, and by compensating a basic ignition timing in accordance with the first and second ignition timing compensation magnitude when the vehicle is accelerated.

Abstract: Values of a correction amount of correcting a fundamental control amount of an internal combustion engine are stored in a rewritable memory having divisional storage areas corresponding to divisional running areas. When a value of the correction amount for a particular divisional running area is renewed, concurrently therewith, values of the correction amount for divisional running areas adjacent to the particular divisional running area are also renewed.

Abstract: A method and a controller for supplying a fuel to a plurality of cylinders of an internal combustion engine, in which engine operation conditions including the operating temperature of the engine are detected by various sensors attached to the engine and by using a microcomputer, and the fuel is successively supplied by being injected to the engine cylinders based on the detected engine operation conditions. The timing of fuel injection into each of the plurality of cylinders is . .shifted from an exhaust stroke period to a suction stroke period according to the operating temperature of the engine among the detected engine operation conditions.!. .Iadd.set in a suction stroke period at the time of the engine starting in a low temperature condition, and is shifted to an exhaust stroke period as the level of the engine temperature rises.Iaddend..