Glossary of terms (Triumph Rocket III)
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- Triumph
- Rocket
- Rocket III
- Engine and systems
- Fuel and control system
- Glossary of terms
The following terms and abbreviations will be found in this section. Below is given a brief explanation of what some of the more common terms and abbreviations mean.
The air temperature in the air box and intake hose.
Sensor located in the airbox to detect the temperature of the incoming air.
After Top Dead Centre.
Pressure of the air in the airbox.
The voltage at the input to the Electronic Control Module (ECM).
[The text is taken from a website MOTOINSTRUCTION]
Before Top Dead Centre (TDC).
Device placed in the exhaust system which reduces exhaust emissions by stimulating secondary combustion of the exhaust gases.
Throttle position at idle (i.e. against end stop), measured as a voltage and expressed as percentage.
The coolant temperature in the cylinder head.
Sensor which detects coolant temperature.
The "on" or "off" condition of the cooling fan.
Diagnostic Trouble Code.
Engine Control Module.
The crankshaft revolutions per minute.
A data set captured at the time a Diagnostic Trouble Code (DTC) is set.
The percentage above or below the nominal fuel requirement for the volume of air entering at idle.
Adjustment of fueling at idle to suit the actual air inducted.
The target idle speed as determined by the Electronic Control Module (ECM). (It should be the same as the actual idle speed if the motorcycle is operating correctly).
The timing of ignition at the spark plug relative to top dead centre.
The "on" or "off" position of either or both the ignition switch and the engine stop switch.
Same as "ignition advance".
The time during which an injector remains open (i.e. delivering fuel).
Fueling after adapting to the engine's long term fueling requirements (closed loop only). See also short term fuel trim.
Manifold absolute pressure (the air pressure in the intake system).
Malfunction Indicator Lamp. Illuminates when most Diagnostic Trouble Codes (DTC's) are set.
The "neutral" or "in gear" status of the gearchange.
The percentage above or below the nominal fuel requirement for the volume of air entering at engine speeds other than idle. This function is not currently used in the Triumph system.
A break in an electrical circuit - current cannot flow.
High temperature within the Electronic Control Module (ECM) caused by an internal or external failure.
Sensor for the primary (lower) throttle position.
Stepper motor used to vary throttle opening at idle and when the engine is clod.
The time the purge valve is open in an open / close cycle, expressed as a percentage of the cycle time.
Gearbox mounted sensor which delivers information to the ECM that is converted to the road speed value that is displayed on the speedometer.
Sensor for the second (upper) throttle position.
Stepper motor used to vary all second throttle positions, on or off idle.
Supply voltage to the system sensors (nominally 5 volts).
A "short cut" in an electrical circuit - current by-passes the intended circuit (usually to earth).
A correction applied to the fuel mixture during closed loop catalyst operation. This, in turn has an effect on the long term fuel trim in that, if an engine constantly requires mixture correction, the long term fuel trim will adapt to this requirement thus reducing the need for constant short term adjustment.
The "up" or "down" position of the side stand.
The actual time from coil "on" to coil "off".
The position of the throttle butterfly given as a percentage of the movement range. When the data is displayed on the tool, fully open need not be 100% nor fully closed 0%.
Voltage at the throttle potentiometer.
Battery voltage.
Air temperature
The air temperature in the air box and intake hose.
Air temperature sensor
Sensor located in the airbox to detect the temperature of the incoming air.
ATDC
After Top Dead Centre.
Barometric pressure
Pressure of the air in the airbox.
Battery voltage
The voltage at the input to the Electronic Control Module (ECM).
[The text is taken from a website MOTOINSTRUCTION]
BTDC
Before Top Dead Centre (TDC).
Catalyst
Device placed in the exhaust system which reduces exhaust emissions by stimulating secondary combustion of the exhaust gases.
Closed throttle position
Throttle position at idle (i.e. against end stop), measured as a voltage and expressed as percentage.
Coolant temperature
The coolant temperature in the cylinder head.
Coolant temperature sensor
Sensor which detects coolant temperature.
Cooling fan status
The "on" or "off" condition of the cooling fan.
DTC
Diagnostic Trouble Code.
ECM
Engine Control Module.
Engine speed
The crankshaft revolutions per minute.
Freeze frame
A data set captured at the time a Diagnostic Trouble Code (DTC) is set.
Idle fuel trim
The percentage above or below the nominal fuel requirement for the volume of air entering at idle.
Idle fueling
Adjustment of fueling at idle to suit the actual air inducted.
Idle reference speed
The target idle speed as determined by the Electronic Control Module (ECM). (It should be the same as the actual idle speed if the motorcycle is operating correctly).
Ignition advance
The timing of ignition at the spark plug relative to top dead centre.
Ignition switch position
The "on" or "off" position of either or both the ignition switch and the engine stop switch.
Ignition timing
Same as "ignition advance".
Injector pulse time
The time during which an injector remains open (i.e. delivering fuel).
Long term fuel trim
Fueling after adapting to the engine's long term fueling requirements (closed loop only). See also short term fuel trim.
MAP sensor
Manifold absolute pressure (the air pressure in the intake system).
MIL
Malfunction Indicator Lamp. Illuminates when most Diagnostic Trouble Codes (DTC's) are set.
Neutral switch status
The "neutral" or "in gear" status of the gearchange.
Off idle fuel trim
The percentage above or below the nominal fuel requirement for the volume of air entering at engine speeds other than idle. This function is not currently used in the Triumph system.
Open circuit
A break in an electrical circuit - current cannot flow.
Over temp
High temperature within the Electronic Control Module (ECM) caused by an internal or external failure.
Primary Throttle Position Sensor
Sensor for the primary (lower) throttle position.
Primary Throttle Stepper Motor
Stepper motor used to vary throttle opening at idle and when the engine is clod.
Purge valve duty cycle
The time the purge valve is open in an open / close cycle, expressed as a percentage of the cycle time.
Road Speed Sensor
Gearbox mounted sensor which delivers information to the ECM that is converted to the road speed value that is displayed on the speedometer.
Second Throttle Position Sensor
Sensor for the second (upper) throttle position.
Second Throttle Stepper Motor
Stepper motor used to vary all second throttle positions, on or off idle.
Sensor reference voltage
Supply voltage to the system sensors (nominally 5 volts).
Short circuit
A "short cut" in an electrical circuit - current by-passes the intended circuit (usually to earth).
Short term fuel trim
A correction applied to the fuel mixture during closed loop catalyst operation. This, in turn has an effect on the long term fuel trim in that, if an engine constantly requires mixture correction, the long term fuel trim will adapt to this requirement thus reducing the need for constant short term adjustment.
Sidestand status
The "up" or "down" position of the side stand.
Target dwell time
The actual time from coil "on" to coil "off".
Throttle position
The position of the throttle butterfly given as a percentage of the movement range. When the data is displayed on the tool, fully open need not be 100% nor fully closed 0%.
Throttle voltage
Voltage at the throttle potentiometer.
Vbatt
Battery voltage.
See this article in russian language
This article has been reviewed: Serafim Sazonov
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- Information for owner
- Introduction to manual
- Engine and systems
- Engine repair
- Cooling system
- Lube system
- Fuel and control system
- Transmission
- Running gear and frame
- Frame and hinged elements
- Front suspension and handlebar
- Rear suspension
- Brake system
- Wheels and tires
- Electric equipment
- Equipment and devices
- Starting and charging system
- Electrical circuits