Acceleration Enrichment - Yamaha XV1700PCRC Service Manual

Hide thumbs Also See for XV1700PCRC:

Table of Contents

• Acceleration enrichment

Acceleration enrichment is provided in accordance with the signals from the throttle position sensor.

As the rider operates the accelerator to accelerate the motorcycle from a constant speed, the throt-

tle position sensor actuates in unison with the accelerator. The ECU interprets that acceleration has

taken place through the throttle position sensor signal and executes acceleration enrichment. The

enrichment volume is determined by the acceleration enrichment coefficient. The coefficient

increases with the changes in the throttle position sensor, which also increases the actual enrich-

ment volume. The enrichment volume is executed in accordance with the acceleration enrichment

coefficient when the movement of the throttle position sensor has met the acceleration condition as

defined by the ECU. Thereafter, the enrichment volume is regulated by the coefficient that changes

in accordance with the damping rate.

(Acceleration injection duration = basic injection duration × acceleration compensation coef-

Changes in compensation coefficient and compensation injection duration

Changes in acceleration

compensation coefficient

throttle position

sensor angle

Starting of acceleration

Acceleration enrichment volume

Basic injection duration

Starting of acceleration

Compensation injection duration