877-764-3337 • 406-388-2377 • Mon-Fri 9am-5pm MST Shopping Cart  |  0 Items
Dobeck Performance   Dobeck YouTube   Dobeck Twitter   Dobeck Facebook   Made in the USA
TFI Fuel Tuning

Power Sports and Electronic Fuel Injection Glossary


Speed variation as a function of time.


During normal driving, many Motronic functions are operational only under specific conditions. This renders it impossible to activate all actuators (such as the EGR valve) for operational checks while on the road.


During acceleration, the L-Jetronic meters additional fuel to the engine. If the throttle is opened abruptly, the air-fuel mixture is momentarily leaned-off, and a short period of mixture enrichment is needed to ensure good transitional response.


The good acceleration response is a result of overswing of the air-flow sensor plate. Transitions from one operating condition to another produce changes in the mixture ratio which are utilized to improve driveability.


Chemicals added to fuel in very small sizes to improve and maintain fuel value. Detergents and corrosion inhibitors are examples of gasoline additives.


Way back after World War I, BMW was prohibited from making any 'machines of war' which primarily included airplanes. The brass at BMW decided that they'd like to stay in business, so they borrowed an engine design that reminded them of an airplane engine -- the Boxer -- to put into a motorcycle. That engine design stayed with them for a long, long time, and its penultimate (so far) form was the Airhead.


A measure of distance above sea level.


The hot-wire and hot-film air-mass meters are thermal load sensors. They are installed between the air filter and the throttle valve and register the air-mass flow [kg/h] drawn in by the engine. Both the sensors operate according to the same principle.


The air-temperature sensor incorporates a NTC resistor element. Changes in intake-air temperature can be registered immediately, the resistor protrudes from the end of a trunk shaped molding into the area of maximum air-flow speed. The 4-pole plug-and-socket connection includes the plug for the fuel injector.


Operation of the spark-ignition engine is contingent upon availability of a mixture with a specific air/fuel ratio. The theoretical ideal for complete combustion is a mass ratio of 14.7:1, referred to as the stoichiometric ratio. In concrete terms this translates into a mass relationship of 14.7 kg of air to burn 1 kg of fuel, while the corresponding volumetric ratio is roughly 9,500 liters of air for complete combustion of 1 liter of fuel.


Because the A/F ratio is a crucial factor in defining an engine's emissions, the engine-management system is of immense importance in determining exhaust content.


The ambient-pressure sensor shares its design with the manifold-pressure sensor, but is located inside the ECU. Barometric pressure readings are needed by systems that rely on throttle-valve aperture instead of an air-mass meter to monitor the incoming air supply. The precise data on ambient air density registered by this sensor serve as a significant factor in numerous diagnosis functions.


The signals from the throttle-valve potentiometer are continuous analog signals. As are the lambda-sensor signal, the engine-temperature signal, the intake-air signal, the battery voltage, and a voltage-reference signal generated in the ECU. These analog signals are converted to data words by the analog-digital converter and transmitted to the microprocessor via the data bus.


Manufacturer of power sports equipment and recreational vehicles.

Key Features Find Dealer Installation Contact
Competitor Comparisons Dealer Application FAQ Facebook
TFI Basics Product Discounts Tuning Twitter
Testimonials Instructions YouTube

 A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z 
Thank you for visiting TFIcontrollers.com where we provide power sport enthusiasts tuning electronics.

© 1997-2024 Dobeck Performance. Manufacturer of the TFI. All Rights Reserved. Privacy Policy