2) Fuel consumption control

1. The engine electronic control box (6) calculates the target speed based on:

- working mode data sent via CAN communications from the main electronic control box (5),

- voltage signals from the acceleration control (3),

- voltage signals from the water temperature sender (10),

- voltage signals (starter motor switch 1) which feed the engine electronic control box.

2. The engine electronic control box calculates the fuel flow from the difference between the target speed (electronic acceleration tachometric sender) and the real speed (engine speed detector 8), 3. The engine electronic control box converts the fuel flow at the target position of the electronic acceleration rack (7) and corrects that target position in accordance with the regulating resistance (9).

3) Engine starting control

1. When the contact switch (1) is in the starting position the starting signal is sent simultaneously to the starter motor and the engine electronic control box.

2. The engine electronic control box determines the fuel injection flow. This flow is determined from the water temperature data and the real number of revolutions of the engine.

3. Once the starting signal is extinguished, the engine electronic control box changes from starting fuel control to normal fuel injection flow control.

4) Engine stop control

When the engine stop signal is received (when the ignition switch is turned off or the emergency stop control is (2) is operated), the engine electronic control box transmits the rack position signal "no injection" to the electronic acceleration and activates the engine stop signal.

5) Electronic acceleration assistance error and emergency mode

1. The rack detector signal reaches the engine electronic control box.

2. The engine electronic control box compares the target position and the real position of the rack.

3. If the engine electronic control box determines that the rack is not in the correct target position, it will consider it to be an assistance error and will stop the engine.

4. If the emergency mode is activated when an electronic acceleration assistance error occurs, the engine operates in emergency mode (See "Emergency Mode" Section).

3) Mode selector switch

a) When the ignition is switched on, "S" is selected by default (unless auto mode auto was selected when the ignition was switched off)

b) Every time the travel mode switch (1) is pressed, the mode changes:

S -> H -> L -> S -> H

c) If the auto mode switch (2) is operated, the mode changes to auto mode. If the auto mode switch is pressed again, the mode changes to "S" mode.

d) When auto mode is running, if the work mode switch (1) is pressed, the mode does not change.

e) If the ignition is switched off in auto mode, the mode stays in auto when the ignition is switched on again.

4) Operation

1. The mode switch signal (1 and 2) is managed by the main electronic control box (4) which changes the mode in accordance with the input signal.

2. The electronic control box (4) transmits the selected mode to the control screen (LCD) via series communications (9). The control screen shows the mode selected.

3. The main electronic control box (4) transmits the selected mode to the engine electronic control box (6) via CAN communications which controls the electronic acceleration (7).

The engine electronic control box (6) transmits the mode and the data concerning the number of revolutions to the main electronic control box (4) via CAN communications.

4. The main electronic control box (4) calculates the proportioning valve current (5) based on the mode selected and the data concerning the real number of revolutions of the engine and the target number of revolutions.

5. The main electronic control box (4) transmits the new data to the display screen (LCD) via series communications.