Throttle valve positioning control apparatus

The throttle valve positioning control apparatus, for controlling the positioning of a throttle valve situated to control the amount of air permitted to enter an internal combustion engine operable in a plurality of control modes, comprising:

• drive means responsive to a drive signal indicating a target throttle valve position for moving the throttle valve to the target throttle valve position;
• sensor means sensitive to the movement of the throttle valve for producing a sensor signal indicative of a sensed throttle valve position;
• and
• control means connected between the sensor means and the drive means for producing the drive signal to bring the sensed throttle valve position into coincidence with the target throttle valve position, the control means including disturbance estimating means for estimating disturbances introduced onto the drive means and the sensor means based on the target and sensed throttle valve positions, and means for correcting the target throttle valve position based on the estimated disturbances, wherein the sensor means includes a sensor for producing an analog sensor signal indicative of the sensed throttle valve position and an analog-to-digital converter for repetitively converting the analog sensor signal into a corresponding digital value at uniform intervals of time, and means for averaging the digital values converted for a predetermined period of time to produce the sensor signal.

An apparatus for controlling the positioning of a throttle valve situated to control the amount of air permitted to enter an internal combustion engine operable in a plurality of control modes, comprising:

• drive means responsive to a drive signal indicating a target throttle valve position for moving the throttle valve to the target throttle valve position;
• sensor means sensitive to the movement of the throttle valve for producing a digital sensor signal indicative of a sensed throttle valve position;
• and
• control means connected between the sensor means and the drive means for producing the drive signal to bring the sensed throttle valve position into coincidence with the target throttle valve position, the control means including disturbance estimating means for estimating disturbances introduced onto the drive means and the sensor means based on the target and sensed throttle valve positions, and means for correcting the target throttle valve position based on the estimated disturbances;
• wherein the sensor means includes a sensor for producing an analog sensor signal indicative of the sensed throttle valve position, a plurality of amplifiers for amplifying the analog sensor signal at different amplification factors, analog-to-digital converters for converting the respective amplified analog sensor signals into corresponding digital values, and means for selecting one of the digital values according to the control mode where the engine is operating to produce the sensor signal.

The throttle valve positioning control apparatus, for controlling the positioning of a throttle valve situated to control the amount of air permitted to enter an internal combustion engine operable in a plurality of control modes, comprising:

• drive means responsive to a drive signal indicating a target throttle valve position for moving the throttle valve to the target throttle valve position;
• sensor means sensitive to the movement of the throttle valve for producing a sensor signal indicative of a sensed throttle valve position;
• and
• control means connected between the sensor means and the drive means for producing the drive signal to bring the sensed throttle valve position into coincidence with the target throttle valve position, the control means including disturbance estimating means for estimating disturbances introduced onto the drive means and the sensor means based on the target and sensed throttle valve positions, and means for correcting the target throttle valve position based on the estimated disturbances, wherein the sensor means includes a sensor for producing analog sensor signal indicative of the sensed throttle valve position, a plurality of amplifiers for amplifying factors, analog-to-digital converters for converting the respective amplified analog sensor signals into corresponding digital values, and means for interpolating the digital values to produce the sensor signal.