Introduction To The Engine Control System; Specific Operating Strategies; Inputs And Outputs Of Engine Control Unit And Connection To Can Network - Ducati Diavel Workshop Manual

Introduction to the engine control system

9 -Introduction to the engine control system
The engine control system used on the Diavel consists of the following elements:
- Ride-by-wire system (motorised throttle valves with electric actuator, throttle grip position sensor and throttle valve
position sensor)
- One injector per cylinder installed downstream of throttle valve
- One coil per cylinder, in spark plug bore
- Two oxygen sensors (one per cylinder, installed on each exhaust manifold)
- Two absolute pressure (MAP) sensors installed downstream of throttle valve (one per cylinder connected to each intake
duct)
- One three-way catalytic converter for exhaust gas post-treatment
The system also includes conventional sensors for water and air temperature, engine speed-timing etc.

Specific operating strategies

Idle speed
No electric motor is used for idle speed regulation (bypass is modulated instead with the throttle valve), as idle speed
control is effected by the ride-by-wire system. Idle speed is maintained by the control unit when the speed drops below a
specific threshold and when the clutch lever is operated and/or the gearbox is in neutral. The "clutch lever operated"
signal is generated by a button on the lever itself, which interacts directly with the engine control unit. The "gearbox in
neutral" signal is generated by the gear sensor connected to the BBS, and is transmitted to the engine control unit via the
CAN line (target idle speed with engine stabilised at operating temperature is 1,350 rpm). The CO value for each cylinder,
always with engine stabilised at operating temperature, must be within 0.4 and 1.4 in volume percentage.
Throttle valve aperture regimens
The rider may select between four different riding modes (Sport, Touring, Urban) from the tank dashboard and via the
handlebar controls. Each riding mode contains three configurable throttle valve opening strategies (the engine control
calibration parameters, in other terms the maps for quantity of fuel injected and ignition timing advance, are the same for
all). This allows the rider to adapt power delivery and maximum power as follows to suit personal preferences:
- 162 HIGH (torque delivery tuned to give the bike a sports character, with maximum power of 162 hp available (HIGH for
French and Japanese market))
- 162 LOW (torque delivery tuned to give the bike a tourist character, with maximum power of 162 hp available (MIDDLE
for French and Japanese market))
- 100 HP (softened torque delivery with maximum power limited to 100 HP (LOW for French and Japanese market))

Inputs and outputs of engine control unit and connection to CAN network

The diagram illustrates the inputs and outputs for the engine control unit. The signals from the brake buttons, the exhaust
By-pass valve command signal and the gear sensor signal are transmitted over the CAN line.