摘要:
An intake air flow control apparatus for an internal-combustion engine, which includes a valve lift characteristic control means for variable control of the lift characteristics of intake and exhaust valves for the internal-combustion engine and a deceleration intake control means for controlling the quantity of intake air to be supplied to the downstream side of the intake throttle valve during the deceleration operation of the engine, comprises an intake control characteristic change means for changing the control characteristics of the deceleration intake control means in response to the valve lift characteristic control.
摘要:
Failure of a valve timing changeover control system of an internal combustion engine is detected by comparing a present value of an air-fuel ratio feedback control correction coefficient which is varied in response to output from an O.sub.2 sensor with a predetermined value of the correction coefficient obtained based on values of same obtained during the feedback control of the air-fuel ratio. Alternatively, or in combination, failure of the valve timing changeover control system is detected by determining whether a present value of the correction coefficient obtained with respect to each of a plurality of cylinders of the engine in response to output from each of O.sub.2 sensors corresponding to the each cylinder is outside a predetermined range of deviation of values of the correction coefficient from a reference value, the deviation resulting from differences in characteristics between the cylinders.
摘要:
Failure of a valve timing changeover control system of an internal combustion engine is detected by the steps of: (1) setting a predetermined state of intake air to be supplied to the engine depending on a control signal for controlling changeover of valve timing, (2) detecting a state of intake air being supplied to the engine, (3) comparing the detected state of intake air with the set predetermined state of intake air, and (4) detecting from the result of the combustion whether or not there is failure in the valve timing changeover control system.
摘要:
An electronic control apparatus for an engine of a vehicle has a first CPU for fuel control which controls the amount of fuel to be supplied to the engine and a second CPU for throttle valve control which outputs a driving signal to an actuator which operates to open or close the throttle valve disposed in an intake pipe to the engine. The apparatus has an opening degree computing member which is provided in the first CPU to compute an opening degree of the throttle valve based at least on an amount of depression of an accelerator and then to output a result thereof as an opening degree signal. The first CPU and the second CPU are connected together by a communication line which transfers the opening degree signal from the opening degree computing member from the first CPU to the second CPU.
摘要:
Disclosed is a fuel supply control device which can properly control fuel supply at any time by recovering within a short time in the event of out of phase in the drive of the step motor. In a fuel supply mechanism of an internal-combustion engine having a fuel supply control means for controlling the quantity of intake air or fuel supplied into the engine, a step motor for driving the fuel supply control means, and a control value output means for outputting control values to the step motor, the fuel supply control device comprises a position sensor for detecting the control position of the fuel supply control means, a out of phase detecting means for detecting the out of phase of the step motor from the control values supplied from the control value output means and the control position detected by the position sensor, a out of phase step value computing means for converting, into the number of steps of the step motor, a deviation between the control value and control positions at the time of detection of the out of phase condition of the step motor by the out of phase detecting means, and a control value correcting means for correcting the control values of the step motor by using the number of steps determined by the out of phase step value computing means.
摘要:
A control system for an internal combustion engine having at least one intake valve and at least one exhaust valve is disclosed. The control system includes a valve operating characteristic varying mechanism and a hydraulic control valve for controlling a hydraulic pressure to be supplied to the valve operating characteristic varying mechanism. The valve operating characteristic varying mechanism continuously varies an operating phase of the at least one intake valve and/or the at least one exhaust valve of the engine. A cleaning operation of the hydraulic control valve is performed in a predetermined operating condition of the engine. An intake air amount of the engine is controlled according to an operating condition of the valve operating characteristic varying mechanism when the cleaning operation of the hydraulic control valve is performed.
摘要:
There is provided a power output control system for an internal combustion engine, which enables the vehicle to smoothly perform refuge travel to find a place to park when an electric throttle control device becomes incapable of controlling a throttle valve, while ensuring adequate traveling performance. An ECU determines whether or not the electric throttle control device is incapable of controlling the throttle valve, and interrupts energization of the electric throttle control device when it is determined that the electric throttle control device is incapable of controlling the throttle valve. At this time, the opening of the throttle valve is held at the default opening degree by a spring. Further, basic ignition timing is calculated according to the engine rotational speed and load on the engine, and ignition timing of the engine is determined by correcting the calculated basic ignition timing according to the amount of operation of the accelerator pedal.
摘要:
A secondary air supply control system controls supply of air to a catalyst arranged in the exhaust passage of an internal combustion, for purification of exhaust gases. A temperature difference between a temperature of an engine coolant sensed at a stoppage of the engine and stored and a temperature of the engine coolant sensed at a start of the engine after the stoppage is calculated. It is determined whether or not a stop time period between the stoppage and the start of the engine is short, depending on the temperature difference. When it is determined that the stop time period is short, an operation time period over which the air pump is to be operated to supply air to the catalyst is corrected based on a temperature difference between a temperature of the engine coolant sensed at the start of the engine and a temperature of intake air sensed at the start of the engine.
摘要:
An apparatus of controlling an intake air throttle valve capable of obtaining the certain drive for the change in the load applied to the throttle valve due to the change in the intake air amount in the transient period, without any increase in current consumption and reduction in responsiveness. The apparatus includes a throttle valve for controlling an intake air amount in the internal combustion engine; a motor for electrically controlling the throttle valve; and a drive circuit for controlling the drive torque of the motor. It further includes a throttle valve opening defining device for defining a parameter indicating the opening of the throttle valve; a comparing device for comparing the value of the parameter defined by the throttle valve opening defining device; and a torque increasing device for increasing the output torque by the drive circuit when the comparing device judges that the value of the parameter is larger than the specified value.
摘要:
In the event that an abnormality is detected in a throttle valve driving apparatus, an upper limit value for a throttle valve opening is set according to a vehicle speed when a brake switch is not switched on. When the brake switch is on, the upper limit value is set at a predetermined idle opening. When the target opening which is calculated according to an accelerator pedal depression amount is larger than the upper limit value, the target opening is changed to the upper limit value.