Engine Management System Information
No Motobike Manufactor have had involvement in this product.
The use of a manufactures name and / or model designation to describe the
motorcycles on this site does not imply that the manufacturer endorses
the use of this application.
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System
Description (Speed
Triple 955i model 2002 - 2004)
Goto Speed
Triple T509 (885 cc) & 955cc Goto Speed Triple
1050
Goto
Daytona 675
Goto Rocket
III
..
Each model is fitted with an electronic engine management system which encompasses control of both ignitionand fuel delivery. The electronic control module (ECM) draws information from sensors positioned around the engine, cooling and air intake systems and precisely calculates ignition advance and fuelling requirements for all engine
speeds and loads. In addition, the system has hardware diagnostic functions | similar to the US state of California requirements for ! on-board diagnostics (OBDII).This function ensures I that, should a malfunction occur in the system, the malfunction type and engine data at the time the malfunction occurred are stored in the ECM memory. This stored data can then be recovered by a Triumph dealer using a special service tool which is mandatory for all Triumph dealers. In this way, precise diagnosis of a fault can be made and the fault quickly rectified.
System
Sensors
Intake air temperature sensor –
situated
in the top of the airbox towards the rear.
Because the density of the air (and therefore the amount of oxygen
available to
ignite the fuel) changes with temperature, an intake air temperature
sensor is
fitted. Changes in air temperature (and therefore air density) are
compensated
for by adjusting the amount of fuel injected to a level consistent with
clean
combustion and low emissions.
Barometric
pressure sensor – the
barometric pressure sensor is incorporated in the
ECM itself and is connected to the airbox via a hose The barometric
pressure
sensor measures the air pressure in the airbox. From this measurement
the air
density is calculated, and when added to other inputs to the ECM, the
engine
load is calculated.
With
this information, the amount of fuel per
injection of fuel is adjusted to suit the prevailing conditions.
Crankshaft
position sensor – situated
behind the alternator on the left side of the
engine. The crankshaft position sensor detects
movement of a
toothed wheel attached to the left hand end of the crankshaft.
The wheel has 21 teeth which are evenly
spaced, and one triple length tooth next to a triple length gap. The
triple length tooth/gap gives a
reference point from which the actual crankshaft position is calculated. The
crankshaft position sensor
information is used by the ECM to determine engine
speed and crankshaft position in relation to
the point where fuel is injected and ignition of the fuel occurs.
Oxygen
(Lambda) Sensor – situated
in the exhaust system. At idle and other
specified engine speeds, the oxygen sensor continuously senses the
content of
the exhaust gases and signals this information to the ECM. According to
the
signal received, the ECM adjusts the air/fuel ratio to within specific
parameters thus controlling idle CO and eliminating the need for manual
adjustment.
Engine
coolant temperature sensor – situated
in the left side of the cylinder head.
Coolant temperature information, received by the ECM, is used to
optimise
fuelling at all engine temperatures and to calculate hot and cold start
fuelling requirements.
Throttle
position sensor – situated
at the left hand end of the throttle spindle.
The throttle position sensor gives
a reading in the fully closed position and all other throttle opening
angles are
calculated using the fully closed position as a base. Throttle angle is
used by
the ECM to determine fuelling requirements for all throttle positions.
Neutral
switch – situated
in the gearbox. The neutral switch indicates
when the transmission is in neutral.
In addition, the neutral switch provides an interlock facility
preventing the
rider from riding off with sidestand down.
If a gear is selected with the sidestand down, the supply to the ECM is
removed
causing the engine to cut out.
Side stand switch – situated
at the top of the sidestand leg. If the
sidestand is in the down position, the engine will not run unless the
transmission is in neutral or the clutch lever, which also has a
switch, is
pulled in to the handlebar.
Clutch Switch – Situated on the clutch lever. The engine will not start unless the clutch lever is pulled to the handlebar.
System Actuators
In
response to signals received from the sensors, the
ECM directs messages to a series of electronic and electro-mechanical
actuators.
The function and location of the actuators is given below.
Idle Air Control System – located inside the airbox. The system comprises an air control valve fitted with a stepper motor. The system has a controlling influence over the following:
•
Idling.
•
Induction air supply during engine overrun.
•
Air/fuel ratio correction when operating at idle at
altitudes above sea level.
•
Cold and hot start air/fuel ratio correction. When
in operation, the stepper motor opens the air control valve by
a variable distance, allowing a controlled supply of air to flow along
a series
of pipes, into the induction system.
The air is fed to a point between the throttle plates and the inlet
valves.
Secondary Air Injection Control
Valve (not
all markets) – situated
in the
airbox. At certain specific
engine
speeds above idle (determined by the factory
programming of the engine management system), the secondary air
injection
control valve is opened by the ECM and allows an air feed into the
secondary
air system where, each time a pair of exhaust valves open, the exhaust
gases in
the exhaust port create a depression which causes reed valves in the
secondary
air injection system to open. When open, the depression in the exhaust
port
draws air from the control valve, through the open reed valves, into
the
exhaust port. This air promotes secondary combustion of the exhaust
gases in
the ports and header system. Once the exhaust valves close,
the depression is
reduced and the reed valves close.
At
other engine speeds, the system is disabled by
closing the control valve mounted in the airbox.
This
allows an oxygen sensor to control air to fuel
ratios. If air was fed to the exhaust system when the oxygen sensor was
operational, the incoming air would cause inaccuracies in the readings
sensed by
the oxygen sensor (which requires access to 'raw' combustion gases)
which would
lead to rough running.
Canister purge valve (California
models
only) – situated
in the vapour return line between
the carbon canister and the throttle. 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 ECM to give
control over
the rate at which the canister is purged. If the valve was not pulsed,
all the
stored vapour would immediately be drawn into the engine briefly causing
a rich
mixture and very high emissions.
Injectors – located
in the cylinder head. The engine is fitted with 3 quadruple-jet
injectors which
are targeted as close as possible to the back face of the inlet valves.
The
spray pattern of the injectors is fixed but the length of time each
injector
remains open is variable. The duration of each injection is calculated
by the
ECM using data received from the various sensors in the system.
Plug top ignition coils
– mounted
directly onto the top of each spark plug. The
ECM controls the point at which the coils are switched on and off. In
calculating the switch-on time, the 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.
Main power relay – situated
adjacent to the ECM, beneath the motorcycle
seat. When the ignition is switched on, the main power relay is powered
up to
provide a stable voltage supply for the ECM.
When the ignition is switched off, the ECM holds the main power relay on so that it can carry out the power down procedure which includes:
•
writing data to the ECM memory,
•
referencing the position of the idle air control
valve stepper motor,
•
running the cooling fan until the engine is
sufficiently cool.
Once
all the power down procedures have been carried
out, the main power relay is turned off.
Fuel pump – located
inside the fuel tank on the right hand side of
the motorcycle. The electric pump delivers fuel into the fuel system,
via a
pressure regulator, at a constant 3 bar pressure. The pump is run
continuously
when the engine is running and is also run briefly when the ignition is
first
switched on to ensure that 3 bar is available to the system as soon as
the
engine is cranked.
!!
Important note !!
No Motobike Manufactor have had involvement in this
product.
The use of a manufactures name and / or model
designation to describe the
motorcycles on this site does not imply that the manufacturer endorses
the use of this application.