592
• Canister purge valve - situated in front of the cylinder head. The purge valve
controls the return of vapour which has been stored in the carbon canister during the
period when the engine is switched off. The valve is 'pulsed by the engine ECM to
give control over the rate at which the canister is purged.
• Injectors - located in the cylinder head. The engine is fitted with six injectors (two for
each cylinder). The spray pattern of the injectors is fixed but the length of time each
injector can remain open is variable according to operating conditions. The duration
of each injection is calculated by the engine ECM using data received from the
various sensors in the system.
• Ignition coils - situated above the camshaft cover, attached to the frame. There are
three coils fitted, one for each of the cylinders. There are two high tension leads from
each ignition coil to the pair of spark plugs at each cylinder. The engine ECM controls
the point at which the coils are switched on and off. In calculating the switch-on time,
the engine ECM allows sufficient time for the coils to charge to a level where a spark
can be produced. The coils are switched off at the point of ignition, the timing of
which is optimised for good engine performance.
• Engine management system relay - situated infront of the battery under the rider's
seat. When the ignition is switched on, the main power relay is powered up to
provide a stable voltage supply for the engine ECM.
• Fuel pump - situated inside the fuel tank. The electric pump delivers fuel into the
fuel system, via a pressure regulator, at a constant 3.5 bar pressure. The pump is run
continuously when the engine is operating and is also run briefly when the ignition is
first switched on to ensure that fuel at 3.5 bar pressure is available to the system as
soon as the engine is cranked. Fuel pressure is controlled by a regulator also situated
inside the fuel tank.
• Cooling fan speed controller - situated behind the radiator. The cooling fans are
controlled by the cooling fan speed controller. When the coolant temperature rises
to 91°C the fans will operate at 10% speed. As the coolant temperature rises the fans
speed will gradually increase up to 100% at 103°C.
• Secondary air injection solenoid - situated in front of the cylinder head. The
secondary air injection solenoid controls airflow through the secondary air injection
system.
To Next Page
Loading...
