Yamaha FJR1300R, Service Manual

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GEN
INFO
FEATURES
• 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-
ficient)
Changes in compensation coefficient and compensation injection duration
Compensation injection duration
Acceleration enrichment volume
Basic injection duration
Duration
Starting of acceleration
Long
Changes in acceleration
compensation coefficient
Large
Small
Changes in
throttle position
sensor angle
Duration
Starting of acceleration
Injection
duration
Short