摘要:
In an air-fuel ratio feedback control of an internal combustion engine aimed to approximate an air-fuel ratio to a target air-fuel ratio set according to operating conditions of the engine, the feedback control is carried out using the feedback control amount which is computed according to a sliding mode control, having a deviation between the target air-fuel ratio and the detected air-fuel ratio detected by the air-fuel ratio sensor set as a switching function. According to the present invention, a simple air-fuel ratio feedback control is carried out according to an accurate sliding mode control with no dispersion for each engine, that is easy to design, and that can be applied generally to any kind of vehicle or engine. Further, by varying the feedback gain depending on operating conditions, by controlling the computing cycle of the feedback control amount, or by performing a Smith dead time compensation control, the influence provided by the dead time element existing in the control object is eliminated, thereby ensuring the response characteristic and stability of the control system.
摘要:
In a valve timing control apparatus for an internal combustion engine to control a rotation phase of a camshaft relative to a crankshaft so that opening and closing timing of intake and exhaust valves is variably controlled, a feedback correction amount of the rotation phase is calculated by a sliding mode control using a switching function obtained by adding a deviation between a target value and an actual value to a differential value of the deviation, to thereby feedback control using the feedback correction amount. According to this constitution, a control can be executed with high robust and with low influence due to disturbances.
摘要:
In an apparatus for, controlling a variable valve timing mechanism that variably controls valve timing of an engine by changing a rotation phase of a camshaft relative to a crankshaft due to friction braking of an electromagnetic brake, the rotation phase is controlled while limiting a change rate of the rotation phase.
摘要:
In a fuel vapor purge system, a diagnosis section inclusive of a fuel tank is pressurized from the generation of fuel vapor in the fuel tank has been finished after an operation of an engine was stopped, and the diagnosis is performed based on a pressure in the diagnosis section.
摘要:
In a fuel vapor purge system, a diagnosis section inclusive of a fuel tank is pressurized from the generation of fuel vapor in the fuel tank has been finished after an operation of an engine was stopped, and the diagnosis is performed based on a pressure in the diagnosis section.
摘要:
A throttle valve switch unit for use with a throttle valve situated in an internal combustion engine. A mobile contact is drivingly connected to the throttle valve for movement with rotation of the throttle valve. The mobile contact is engageable with at least two fixed contacts. The first fixed contact is placed for engagement with the mobile contact when the throttle valve occupies a first predetermined position. The second fixed contact is placed for engagement with the mobile contact when the throttle valve occupies a second predetermined position. The first fixed contact is connected through a first resistance element to one of a first terminal for connection to the ground and a second terminal for connection with a source, of voltage. The second fixed contact is connected to the one terminal through a second resistance element having a resistance value different from that of the first resistance element. The mobile contact is connected to the other terminal through a third resistance element. The mobile contact is connected to a single signal terminal for producing signals having voltage levels different when the throttle valve occupies the first predetermined position than when the throttle valve occupies the second predetermined position.
摘要:
An engine control unit that controls an engine and a fuel supply control unit that controls a fuel supply apparatus are disposed separately, and the antitheft process is performed individually by the respective control units.
摘要:
In a fuel vapor purge system, an occurrence of leakage in a diagnosis zone is diagnosed, based on data indicating a pressure rise characteristic in the diagnosis zone for when the diagnosis zone is pressurized, and data indicating a pressure drop characteristic in the diagnosis zone after the pressurization of the diagnosis zone is stopped.
摘要:
An engine control unit that controls an engine and a fuel supply control unit that controls a fuel supply apparatus are disposed separately, and the antitheft process is performed individually by the respective control units.
摘要:
In a diagnosis control for periodically detecting a pressure in a fuel tank during an operation of an engine is stopped, to diagnose whether or not the leakage occurs in a fuel vapor purge system, the power supply to a sensor detecting the pressure in the fuel tank is intermittently performed at each detection period.