Yamaha 2004 FJR1300(S), Дополнительное руководство по обслуживанию

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GEN
INFO
FEATURES
FI SYSTEM
The fuel pump delivers fuel to the injector via the fuel filter. The fuel pump maintains the fuel pres-
sure that is applied to the injector at only 324 kPa (3.24 kg/cm
2
, 46.08 psi). Accordingly, when the
energizing signal from the ECU energizes the injector, the fuel passage opens, causing the fuel to
be injected into the intake manifold only during the time the passage remains open. Therefore, the
longer the length of time the injector is energized (injection duration), the greater the volume of fuel
that is supplied. Conversely, the shorter the length of time the injector is energized (injection dura-
tion), the lesser the volume of fuel that is supplied.
The injection duration and the injection timing are controlled by the ECU. Signals that are input from
the throttle position sensor, crankshaft position sensor, intake air pressure sensor, intake air tem-
perature sensor, coolant temperature sensor, and O
2
sensor enable the ECU to determine the
injection duration. The injection timing is determined through the signals from the crankshaft posi-
tion sensor and the cylinder identification sensor. As a result, the volume of fuel that is required by
the engine can be supplied at all times in accordance with the driving conditions.
1
Fuel pump
2
Fuel injector
3
Throttle body
4
Intake air temperature
sensor
5
Throttle position sen-
sor
6
Intake air pressure
sensor
7
ECU
8
Coolant temperature
sensor
9
O
2
sensor
0
Cylinder identification
sensor
A
Crankshaft position
sensor
È
Fuel system
É
Control system
Illustration is for reference only.
#4 #3 #2 #1
1
5
7
4
6
3
A
8
2
0
9
È
É