摘要:
An engine control method and apparatus wherein a combustion state in each cylinder of an internal combustion engine is detected based on the fluctuation the rotating angular speed of an engine. A correction control is performed to make the combustion states in each of the cylinders uniform, followed by the base value for the purpose of correction control is obtained when the fluctuation in the rotating angular speed is small.
摘要:
Disclosed is an apparatus for controlling the fuel injection quantity for an internal combustion engine. The apparatus includes an operating condition detecting unit for detecting the operating conditions of an internal combustion engine on the basis of the engine speed and the intake air amount or the internal pressure of an intake pipe, a purge control variable calculating unit for calculating the amount of the purge control on the basis of the detected operating conditions, an A/F ratio learning and calculating unit for learning the deviation from the desired A/F ratio control by inputting the effect of the disturbance due to the canister purge and performing the A/F ratio feedback control, a memory unit for storing the deviation learned by the calculating unit, and a fuel injection quantity calculation means unit for determining the fuel injection quantity by the amount of correction based on the result of the learned deviation and the A/F ratio deviation obtained by the A/F ratio control.
摘要:
A control device for an internal combustion engine capable of conducting lean burn control, such as exhaust gas emission control, always optimally regardless of a timewise change of the internal combustion engine, variations in engines, and an environmental change. The control device includes a detector for detecting a burn condition of the internal combustion engine, a lean limit air-fuel ratio factor map, a lean burn feedback logic, an oxygen concentration sensor, and a feedback control logic for controlling an air-fuel ratio to a theoretical air-fuel ratio, wherein lean burn is performed at the middle point between the lean limit air-fuel ratio and the theoretical air-fuel ratio.
摘要:
A car control apparatus in which correction characteristics indicating whether or not various control constants are proper or not are calculated through loop control of one of the car's operation parameters, such as the air-fuel ratio, on the basis of the air-fuel ratio correction factors subjected to learning to thereby rationalize the control constants such as the fundamental injection time so as to realize proper fuel injection and proper ignition timing control.
摘要:
An engine control system is disclosed in which the air-fuel ratio is controlled by feedback in accordance with the oxygen concentration detected of the exhaust gas, and a feedback control system thereof separate learning compensation values for compensating for the changes of the input/output characteristics of an air flow meter and a fuel injector respectively. The engine control system comprises a device for detecting the engine intake air flow, a device for detecting the engine speed, a device for detecting the oxygen concentration of the exhaust gas, a device for calculating the error between actual and target air-fuel ratios from the oxygen concentration of the exhaust gas, a device for learning the changes in the input/output characteristics of the intake air flow, a detection device to determine a first compensation factor corresponding to the changes in the input/output characteristics thereof, a device for learning the changes in the input/output characteristics of the fuel injection device to determine a second compensation factor corresponding to the changes in the input/output characteristics thereof, a device for calculating a basic fuel injection amount from the first compensation factor, the engine speed and the intake air amount, a device for calculating a required fuel flow rate reducing the air-fuel ratio error from the basic fuel injection amount, the second compensation factor and the air-fuel ratio error, a device for generating a drive signal indicating the required fuel flow rate, and the device for injecting fuel into the intake air path in the engine in response to the drive signal indicating the required fuel flow rate.
摘要:
A control device employing a computer readable program code, for an engine is provided with an electromagnetic actuator controlling opening and closing operation of an intake valve in response to an electric driving signal. The device determines a target A/F based on a signal corresponding to a requested engine output value and a signal representing a driving condition of the engine, determines a requested intake air flow of a cylinder of the engine based on the signal representing a driving condition of the engine and the target A/F, and determines control values for opening and closing operation of an intake valve based on the requested intake air flow and the target A/F. The control values include at least one of a valve opening timing, a valve opening time and a maximum valve lifting amount of the intake valve. Electric driving signals are generated according to the control values.
摘要:
A control apparatus of an internal combustion engine has: an air flow amount determining unit for determining a request intake air flow amount corresponding to a target output of an engine; a fuel flow amount determining unit for determining a request fuel flow amount to be supplied to the engine; an intake air amount limiting unit for outputting a predetermined limit value as an intake gas total amount value when the determined request intake air flow amount exceeds the predetermined limit value under a predetermined control condition; and a correcting unit for correcting the value of the request fuel flow amount so that the engine generates the target output on the basis of the request intake air flow amount and the limit intake air flow amount when the intake air amount of the engine is limited.
摘要:
When a pulse width limitation control is carried out, an air-fuel ratio feedback correction control such as O2 feedback or an A/F (air-fuel ratio) learning correction control is prohibited or limited. When the pulse width limitation control is carried out, various kinds of factors for carrying out a basic injection amount are made a prohibition condition or a limitation condition, and when other operation conditions arise, the operability is not damaged.
摘要:
A failure diagnosis apparatus for an internal combustion engine having an intake air swirl control valve, includes a broken wire detection unit, a target opening degree/actual opening degree deviation detection unit, an opening degree abnormally detection unit and a target opening degree execution abnormality detection unit. Outputs from these detection units are used to detect a failure of the swirl control valve which becomes a factor for inviting an aggravation of an operability such as a knocking etc.
摘要:
An engine fuel supply apparatus is provided with an accident judging device for effecting accident judgement in a fuel control system under the conditions that the fuel pressure regulator driver is subjected to feedback control of the fuel pressure, and that there is a change in the fuel pressure and the change continues for a predetermined time of period within a set time range.