CONTROL FUNCTIONS (CONT’D)

Application Interface Outline (Cont’d)

•Control failure

A failure detected by the E-ECU may cause the engine to stop. For details see "Engine/control failure detection" sections.

CONTROL FUNCTIONS (CONT’D)

Application Interface Outline (Cont’d)

Emergency stop feature

By installing the emergency stop switch in either *2 or *3 position of [Figure 10-20-1], the engine can be stopped.

Switch installation position Advantage Disadvantage

*2 of [Figure 10-20-1] (recommended)

•The failure log isn’t left in the ECU.

•Even if the rack actuator relay contact is fastened, the E-ECU cuts off the rack actuator output, so that it’s possible to stop the engine.

•When the rack actuator relay contact is fastened, the stop operation is by the E-ECU control.

*3 of [Figure 10-20-1] (recommended)

Idling speed up

•The engine can be stopped without relying on the rack actuator relay.

•The engine can be stopped without using the E-ECU.

•The rack actuator failure remains in the ECU.

•Be noted that the total length of the rack actuator line must not exceed 10 m.

The feature allows the low idling speed to increase gradually until the coolant reaches a specified temperature, helping the engine warm up quickly. See the figure below. See [Figure 10-40-42]. In case of the standard engine with the low idling speed of 600minñ1, this feature is set by default to keep the minimum speed above 1000min-1 to stabilize the engine speed fluctuation in low temperature with the coolant temperature below 10°C. See [Figure 10-40-43] usual low idle speed coolant temperature accelerator position warm up

As in the case of the before-mentioned CSD actuation speed increase, the speed is increased at the same time.

Target speed = speed command from the accelerator + idling speed up speed increase + the CSD actuation speed increase.

For example, the target speed becomes 1075min-1 (800+200+75) in case of the NV3 engine with the low idling speed of 800min-1 in the coolant temperature 10°C.

With the setting of the low idling speed above 1000min-1, this feature isn’t required.Be noted that by keeping this feature effective, the engine speed of the NV2 engine increases to 250min-1; the engine speed of the NV3 increases to 275min1 in the coolant temperature below 10, as mentioned before.