Yamaha XV1700P Service Manual page 38

Fuel control during normal driving
In synchronous injection during normal driving, fuel is injected on a cylinder-by-cylinder basis when
all of the conditions below are met:
1 Other than the stop mode
2 Cylinder identification completed
3 Other than overrun
To determine the injection timing, the ECU calculates the injection timing through the use of the 3D
control map provided in the ECU, which is based on the throttle position and the engine speed.
The injection duration is based on the basic injection duration (obtained through the throttle position,
intake air pressure, and engine speed) to which injection duration compensation (based on the sig-
nals from various sensors such as the intake temperature sensor, atmospheric pressure sensor) is
added to determine the final injection duration. As a result, fuel is supplied to the cylinders.
• Normal synchronous injection
È
É
Ê
1
Ë
#1
Ê
2
Ë
Í
#2
1 Injector #1
2 Injector #2
3 Identification of cylinder #1
4 Identification of cylinder #2
3
Ì Í Î
Î Ï Ì
È Crankshaft position sensor
É Crankshaft identification signal
Ê Injection
Ë Stop
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FEATURES
4
Ï Ì Í
Í Î Ï
Ì Combustion
Í Exhaust
Î Intake
Ï Compression
GEN
INFO
Î
Ì