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A transmission control unit (TCU), also known as a transmission control module (TCM), or a gearbox control unit (GCU), is a type of automotive ECU that is used to control electronic automatic transmissions. Similar systems are used in conjunction with various semi-automatic transmissions, purely for clutch automation and actuation.
A relay valve is an air-operated valve typically used in air brake systems to remotely control the brakes at the rear of a heavy truck or semi-trailer in a tractor-trailer combination. Relay valves are necessary in heavy trucks in order to speed-up rear-brake application and release, since air takes longer to travel to the rear of the vehicle ...
The TCM will also be given a directive to "Bump" or "Creep". Bumping is when the transmission releases all the pressure on the reverse gear for a specified amount of time, allowing the car to "bump" forward. "Creep" is allowing the transmission to release some of the pressure for the duration of the time the driver holds the Secondary button.
An electronic control unit (ECU), also known as an electronic control module (ECM), is an embedded system in automotive electronics that controls one or more of the electrical systems or subsystems in a car or other motor vehicle.
Honda was forced to invent their new system due to the vast array of patents on automatic transmission technology held by BorgWarner and others. Honda initially chose to integrate the transmission and engine block for its first application (in the N600) as in the Mini. The Hondamatic incorporated a lockup function, which Honda called a third ...
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If brake pressure is distributed from the rear wheel to the front wheel and the friction of the surfaces changes suddenly (puddle, ice on the street) the front wheel might lock even if only the rear brake has been applied. This would lead to a loss of stability and a fall down. CBS is therefore combined with ABS to avoid this on a motorcycle.
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