Raider 50 HP TLDI, Service Manual

Page: 12 / 193

1-5
c) ECU Control
ECU Control ECU Control
ECU Control
With TLDI, a network of connected sensors enables the Engine Control Unit (ECU) to precisely regulate fuel
mixture, injection rate and ignition timing. The ECU also uses a stratified fuel feed process to provide lean
combustion in the low-speed range, while utilizing more homogenized change to ensure the fuel mixture is
distributed uniformly throughout the combustion chamber when operating in the high-speed range to ensure
maximum combustion efficiency.
Below is a block diagram of the Engine Control Unit that allows the Raider 50 horsepower outboard to function as
a multi-fuel engine.
Input Control
Input Control Input Control
Input Control
(Sensor/Switch)
Control
Control Control
Control
(ECU)
Output
Output Output
Output
(Actuator)
Throttle-Position Sensor
(TPS)
#1, #2 &#3
Fuel injectors
Crank-Position Sensor
(CPS)
#1, #2 &#3
Air injectors
Water-
Temperature
Sensor
#1, #2 &#3
Ignition coils
Oil level Sensor Fuel Selector
Capacitor Warning indicators
De-Watering Pull
Warning oil
Stop Switch
Engine Control
Unit
(ECU)
Fuel-feed pump (FFP)
Note: All warning indicators have been silenced on the Raider to not compromise missions.
RAIDER has also integrated a series of mechanical valves into the TLDI to remove water from the system after
submersion. These valves are detailed in detail in Chapter 7.