Abstract: An engine control system to calculate the intake air quantity comprises engine revolution speed detecting means for producing an output signal of engine revolution data, intake air temperature detecting means for producing an output signal of intake air temperature data of the intake manifold, cylinder operation condition determining means for producing an output signal of the cylinder operating condition data for each engine cylinder, intake air pressure detecting means for producing an output signal of air pressure data of the intake manifold, intake air ratio compensation value calculating means for calculating, on the basis of the cylinder operation data of each cylinder an intake air ratio compensation value derived from the air pressure data of air in the intake manifold and the engine revolution speed data of the engine, and intake air quantity calculating means for calculating an intake air quantity on the basis of the intake air ratio compensation value.

Abstract: A control device for an internal combustion engine detects the air fuel ratio of the internal combustion engine at a condition with high accuracy and responsibility. Accordingly, improvement of the fuel consumption of the engine, improvement of the power of the engine, and improvement of the exhaust gas are achieved. The control device for an internal combustion engine calculates, in turn, a first air fuel ratio based on the fuel injection suction, a second air fuel ratio at the time when the gas is reached to the large area air fuel ratio sensor, and a third air fuel ratio at the time when the large area air fuel ratio sensor detects the air fuel ratio, according to the fuel amount calculated with respect to the difference between the sensed air fuel ratio and the objective air fuel ratio, to judge a jam of the large area air fuel ratio sensor by comparing the third air fuel ratio with the sensed air fuel ratio.

Abstract: A control device for an internal combustion engine and a continuous variable transmission which enables well-responsible transmission control to be carried out at a proper transmission rate without increasing the transmission shock. When engine power corresponding to an engine power torque corrected amount is changeable, then an intake air flow adjusting unit is controlled in response to a corrected engine power torque corrected amount. On the contrary, when the corrected engine power torque corrected amount is not changeable, the amount corrected engine power torque corrected is restricted within a range where the engine power can be changed.

Abstract: A parameter representing a real generation amount is detected and the intake is increased based on the detected parameter instead of on-information of the switch of the electric load. Therefor, the rotation speed in idling is stabilized without excess idle-up. The controllability is excellent due to the combination with controlling the load of the alternator itself.

Abstract: A method and apparatus for calculating a target torque of an engine in accordance with operation condition of a vehicle, calculating a target intake air amount per engine revolution cycle required to generate the target engine torque, calculating an opening of a sub throttle valve disposed in an intake path of the engine from an opening of a main throttle valve disposed in the intake path, of which an opening is controlled in accordance with an operation amount of an accelerator pedal, and the target intake air amount, or calculating an equivalent throttle opening assuming the main throttle valve and the sub throttle valve as an equivalent throttle valve in accordance with the target intake air amount, calculating the sub throttle valve opening by correcting the equivalent throttle opening with a correction coefficient determined by the relationship between the equivalent throttle opening and the main throttle valve opening, and on/off controlling the sub throttle valve in accordance with the calculated sub t

Abstract: An ignition timing controller is furnished for use in a spark-ignition internal combustion engine. The controller includes a device for setting the ignition timing of the engine in accordance with the state of operation of the engine and another device for actuating an ignition system on the basis of the ignition timing set by the ignition timing setting device. The ignition timing setting device is constructed of a device for estimating the wall temperature of a combustion chamber of the engine from a variable, which indicates the quantity of combustion energy of the engine, and another device for calculating the ignition timing from the wall temperature of the combustion chamber estimated by the wall temperature estimating device.

Abstract: A controlling system for a vehicle-carried internal combustion engine which prevents the rotational speed of the engine from rising excessively high even when an accelerator pedal is operated in a condition of a power transmitting system wherein it does not transmit the driving force of the engine from a transmission to a wheel of the vehicle whether the vehicle is in a stopping condition or in a driving condition. Such condition of the power transmitting system is detected by a driving force transmitting condition detector, and when such condition is detected, a controller controls a throttle valve of the engine so that the opening of the throttle valve may not exceed a predetermined throttle opening greater than an idling throttle opening irrespective of an operation amount of the accelerator pedal.

Abstract: In an engine output control apparatus including an engine output control means for controlling the output of an engine, an electric motor for driving the means, and a motor control means for controlling the electric motor commensurate with the state of operation of an accelerator pedal, a method of controlling the output of the engine, comprising: obtaining an engine torque target (Te) commensurate with the state of operation of the accelerator pedal; calculating a target amount of engine control (.theta.t) based on the engine torque target (Te) and an engine speed (Ne); and controlling the engine output control means by the electric motor so as to meet with the target amount of engine control (.theta.t).

Abstract: A slip value of a driving wheel is calculated on the basis of driving and driven wheel velocities detected by wheel velocity sensors, a target engine output of a vehicle is set in accordance with the slip value of the driving wheel, a target intake air amount to the engine is set in accordance with the target engine output, a target opening of a throttle valve is set based on the target intake air amount, an opening correction value of the throttle valve is calculated in accordance with a deviation between the target intake air amount and an actual intake air amount detected by an air flow sensor, the opening of the throttle valve is controlled to attain an opening as a sum of the target opening and the opening correction value when the air flow sensor is in a normal state, and the throttle valve opening is controlled to a basic target opening when a malfunction occurs in the air flow sensor, thereby achieving engine output control by a traction controller even when a malfunction occurs in the air flow sensor

Abstract: In an output control apparatus for an internal combustion engine according to this invention, a target torque of a driving shaft of an automobile is determined in accordance with the pedaling stroke of an accelerator pedal, and a deviation between the target torque and an actual torque of the driving shaft is obtained. On the assumption that the whole system of the automobile, including the internal combustion engine, is in a steady-state operation mode, on the other hand, a steady-state output torque of the internal combustion engine, required for applying the target torque to the driving shaft, is obtained.

Abstract: Throttle valves are individually disposed in a plurality of intake passages of an engine. In normal operation condition of the throttle valves, a first control device controls the throttle valves according to the detection result of an operation condition detecting device to control the amounts of intake air of the individual intake passages, thereby obtaining good engine performance from low-speed to high-speed ranges. When an abnormality detecting device detects an abnormality in a throttle valve, a determination device determines a normal throttle valve, and a second control device controls only the normal throttle valve in preference to the first control device to control the intake air amount, thereby ensuring continued operation even if a malfunction occurs in one of the throttle valves.

Abstract: A failure diagnostic apparatus in an engine intake system is provided comprising a throttle valve arranged in an intake path of the engine, a detecting unit detecting an opening of the throttle valve, a detecting unit detecting an air amount passing through the intake pipe, a detecting unit detecting an output torque of the engine, an estimating unit estimating an air amount passing through the throttle valve on the basis of the opening of the throttle valve, an estimating unit estimating an air amount on the basis of the output torque, a correction unit adding time delay correction to the output data of the air amounts, and a failure judging circuitry comparing the three air amount provided by the respective unit, thereby making a judgement of a failure on any one of the detecting units.

Abstract: A slip value of a driving wheel is calculated on the basis of driving and driven wheel velocities detected by wheel velocity sensors. A target engine output of a vehicle is set in accordance with the slip value of the driving wheel. A target fuel amount to the engine is set in accordance with the target engine output. A target opening of a throttle valve is set based on the target fuel amount. An opening correction value of the throttle valve is calculated in accordance with a deviation between the target fuel amount and an actual fuel amount to the engine detected by a fuel controller. A traction controller controls to cause the engine output to coincide with the target engine output by ontrolling the opening of the throttle valve to attain an opening as a sum of the target opening and the opening correction value.

Abstract: A driving wheel rotational speed and a driven wheel rotational speed are detected by corresponding wheel speed sensors to calculate a slip value DV of driving wheels. A target output torque of an engine of a vehicle is calculated on the basis of the slip value DV. A target intake air amount per a predetermined number of revolutions of the engine is set in accordance with the target torque. Opening correction of a throttle valve is performed at every control cycle time .DELTA.t on the basis of an difference between a target intake air amount per the predetermined number of revolutions of the engine and an actual intake air amount per the predetermined number of revolutions of the engine in the controller. The opening of the throttle valve is increased/decreased in accordance with the opening correction value .DELTA..theta.ti by the motor drive circuit.

Abstract: A method and device for determining and controlling the condition of a spark ignition internal combustion engine involves detecting a physical value of combustion varying in association with combustion in the combustion chamber, then calculating the heat evolution rate from the physical value, and then determining the adjusting the combustion condition in dependence on the falling area of the heat evolution rate.