摘要:
An engine having a fuel injector for normally feeding a lean air-fuel mixture into the engine cylinders. Ignition timing is determined so that it is suitable for the lean air-fuel mixture. The gear changing operation of the transmission of the engine is detected from the change in the engine speed and the change in the absolute pressure in the intake passage. When the gear changing operation is carried out, a rich air-fuel mixture is fed into the engine cylinders, and the ignition timing is retarded.
摘要:
An ignition timing control apparatus for a spark ignition internal combustion engine for a vehicle having a manually operated transmission system. The apparatus includes an ignition control system for controlling ignition timing in such a manner that the timing is advanced when the engine speed drops due to engagement of the clutch of the transmission apparatus to begin the initial movement of the vehicle. The drop in the engine speed is sensed by detecting whether a second order difference value of the engine speed is lower than a reference value. This realizes quick control of the engine speed.
摘要:
Synchronous fuel injection amount of injected from a fuel injector in synchronization with rotation of an engine is controlled in relation to the second time differential of either the intake pipe pressure or intake flow rate.
摘要:
Disclosed is an engine having an air-fuel ratio control apparatus for obtaining various air-fuel ratios, the range of which is between the stoichiometric air-fuel ratio or lower than that ratio and the high air-fuel ratio providing a very lean air-fuel mixture. A plurality of ignition timing maps is provided, these maps having a respective order of priority determined by the air-fuel ratio. During operation of the engine, parameters substantially related to the air-fuel ratio ranges are detected, and a map having the highest order of priority is selected from the maps which meet the engine parameters. The ignition timing is calculated from the selected map.
摘要:
In an internal combustion engine, when the opening of a throttle valve is smaller than a relatively small definite value, the feedback of the air-fuel ratio of the engine is controlled so that the air-fuel ratio is brought close to a first target air-fuel ratio. When the opening of the throttle valve is equal to or larger than a relatively small definite value and is smaller than a relatively large definite value, the feedback of the air-fuel ratio of the engine is controlled so that the air-fuel ratio is brought close to a second target air-fuel ratio on the rich side with respect to the first target air-fuel ratio. Further, when the opening of the throttle valve is equal to or larger than the relatively large definite value, the air-fuel ratio of the engine is controlled to be a power fuel increment air-fuel ratio.
摘要:
There is disclosed a control of learning correction coefficient compensating an aging of the air flow meter and a high altitude of highlands where the motor vehicle travels. A lower limit for a altitude compensating learning correction coefficient FHAC is computed by use of the altitude compensating learning correction coefficient FHAC determined during idling of the engine. A feedback correction coefficient FAF is determined such that it gets greater as the air-fuel ratio becomes smaller than the stoichiometric level of air-fuel ratio and it gets smaller as the air-fuel ratio becomes greater than the stoichiometric level of air-fuel ratio. When the mean value FAFAV1 of the feedback correction coefficient FAF is equal to the predetermined value or more, the altitude compensating learning correction coefficient FHAC is increased. Whereas, the mean value FAFAV1 is less than the predetermined value, the altitude compensating learning correction coefficient FHAC is decreased. The altitude compensating learning correction coefficient FHAC is not exceeded the lower limit therefor.
摘要:
The fuel supply to an internal combustion engine is controlled by fuel injection signals that depend on the intake manifold pneumatic pressure PM and the engine running speed NE. The basic pulse width TP of the fuel injection signal is calculated from the equation TP=(TPBSE+TPNE)TPKNE, where TPBSE is taken from a one-dimensional function table PM-TPBSE, TPNE is taken from a one-dimensional function table NE-TPNE, and TPKNE is taken from a one-dimensional function table NE-TPKNE.
摘要:
In an internal combustion engine, the concentration of a specific composition is detected, and the fluctuation thereof is calculated. Surging in the engine is detected by comparing the calculated fluctuation with a predetermined value.
摘要:
In an internal combustion engine wherein a learning correction amount for improving the drivability in a high altitude is introduced into the feedback control of the air-fuel ratio, a lower limit is imposed on the learning correction amount, and a reference value for the lower limit is renewed in accordance with comparison of the mean value of an air-fuel ratio correction amount with a predetermined value and comparison of the learning correction amount with the reference value in an idling state.
摘要:
In an internal combustion engine having a throttle valve, a flag or switch having hysteresis characteristics using the operation of the throttle valve is provided.