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:
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:
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, feedback control of the air-fuel ratio is carried out in accordance with the concentration of a specific composition in the exhaust gas, so that the air-fuel ratio is close to a target air-fuel ratio on the lean side with respect to the stoichimetric air-fuel ratio, the target air-fuel ratio is variable in accordance with the engine temperature.
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:
In an internal combustion engine having two bypass air passages for controlling the idling speed, one (first) of the bypass air passages is controlled in accordance with the engine speed, and the other (second) is controlled in accordance with the ON and OFF state of an electrical load such as an air conditioner. When the electrical load is in the ON state, the first bypass air passage is not closed. Also, before a predetermined time period passes after the electrical load is changed from the ON state to the OFF state, the first bypass air passage is not closed.
摘要:
An engine having a swirl control valve in the intake port. When the engine is operating at a low speed, a lean air-fuel mixture is fed into the engine cylinder, and a swirl control valve is closed in order to create a swirl motion in the combustion chamber. When a predetermined time elapses after the engine operating state is changed from the low speed-light load state to the low speed-heavy load state, the vacuum chamber of an actuator actuating the swirl control valve is opened to the outside air and, thereby, the swirl control valve is forced to open to the maximum extent. At the same time, the air-fuel mixture fed into the engine cylinder is changed to an air-fuel mixture of an approximately stoichiometric air-fuel ratio from the lean air-fuel mixture.
摘要:
In an internal combustion engine wherein feedback control of the air-fuel ratio is carried out in accordance with the concentration of a specific composition in the exhaust gas, so that the air-fuel ratio is close to an aimed air-fuel ratio, the atmospheric pressure is detected, and the aimed air-fuel ratio is varied in accordance with the detected atmospheric pressure.