Suzuki GSX-R 1000 Service Manual: Injection timing description
Injection time (injection volume)
The factors to determine the injection time include the basic fuel injection time, which is calculated on the basis of the intake air pressure, engine speed and throttle opening angle, and various compensations. These compensations are determined according to the signals from various sensors that detect the engine and driving conditions.
Compensation of injection time (volume)
The following different signals are output from the respective sensors for compensation of the fuel injection time (volume).
|
Signal |
Descriptions |
| Atmospheric pressure sensor signal | When atmospheric pressure is low, the sensor sends the signal to the ecm and reduce the injection time (volume). |
| Engine coolant temperature sensor signal | When engine coolant temperature is low, injection time (volume) is increased. |
| Intake air temperature sensor signal | When intake air temperature is low, injection time (volume) is increased. |
| Heated oxygen sensor signal | Air/fuel ratio is compensated to the theoretical ratio from density of oxygen in exhaust gas. The compensation occurs in such a way that more fuel is supplied if detected air/fuel ratio is lean and less fuel is supplied if it is rich. |
| Battery voltage signal | Ecm operates on the battery voltage and at the same time, it monitors the voltage signal for compensation of the fuel injection time (volume). A longer injection time is needed to adjust injection volume in the case of low voltage. |
| Engine rpm signal | At high speed, the injection time (volume) is increased. This is the compensation of the srad. |
| Starting signal | When starting engine, additional fuel is injected during cranking engine. |
| Acceleration signal/deceleration signal | During acceleration, the fuel injection time (volume) is increased,
in accordance with the throttle opening speed and engine rpm. During deceleration, the fuel injection time (volume) is decreased. |
Injection stop control
|
Signal |
Descriptions |
|
| Tip-over sensor signal (fuel shut-off) | When the motorcycle tips over, the tip-over sensor sends a signal to the ecm. Then, this signal cuts off current supplied to the fuel pump, fuel injectors and ignition coils. | |
| Over-rev. Limiter signal | The fuel injectors stop operation when engine rpm reaches rev. Limit rpm. The fuel cut-off circuit is incorporated in this ecm in order to prevent over-running of engine. When engine speed reaches 13 500 r/min, this circuit cuts off fuel at the fuel injectors. But under no load, the clutch lever is pulled or the gear position is in neutral, this circuit cuts off fuel when engine speed reaches 13 100 r/min.
|
Caution
Self-diagnosis function
The self-diagnosis function is incorporated in the ecm. The function has two
modes, “user mode” and “dealer mode”.
The user can only be notified by the lcd (display) panel and led (fi indicator
...
Other materials:
Ignition coil inspection
Refer to “electrical components location” in section 0a .
Ignition coil primary peak voltage
Remove the air cleaner box. Refer to “air cleaner box removal and
installation” in section 1d .
Disconnect all ignition coil. Refer to “ignition coil and spark plug
removal and installation” .
...
Throttle cable routing diagram
Throttle cable no. 1
Throttle cable no. 2
Clutch cablev
Front brake hose
Pass
the throttle cables in front of the front brake hose.
Pass the
clutch cable above the right air intake pipe.
Clamp the
clutch cable at the white taping point and m ...
Ecm removal and installation
Removal
Remove the frame covers. Refer to “exterior parts
removal and installation” in section 9d (page 9d-
6).
Disconnect the battery (–) lead wire.
Remove the tool set (1) and prop stay (2).
Disconnect the hose clamp (3) (e-33 only) and
starter relay (4).
Remo ...