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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 park by wire system engages the parking pawl of a transmission using electrical means, without the traditional mechanical system which involves linkages between the gear shifter and the transmission. Park-by-wire can be considered a part of a shift by wire system, as it shifts the transmission into park mode. [1]
Steering wheel-mounted transmission controls have made a comeback since the mid-1990s introduction of Porsche's Tiptronic system, although the controls for the selection of park, reverse, and neutral are almost always located elsewhere. They also invariably have the buttons or "paddles" for the functions that are on the steering wheel quite ...
Electronics began to be more commonly used to control the transmission, replacing mechanical control methods such as spring-loaded valves in the valve body. Most systems use solenoids which are controlled by either the engine control unit, or a separate transmission control unit. This allows for more precise control of shift points, shift ...
The TC-SST completes the clutch and gear shifts more quickly than a driver could in a conventional manual transmission, and is also quicker than either an automatic transmission with a torque converter, or a single-clutch automated manual transmission. [3] The system's high-efficiency power transmission mechanism is on par with a normal manual ...
The system offers a choice of four rear-or four-wheel driving modes with both high and low ranges, selected using a lever mounted alongside the gear shift lever, both in motion or stopped (depending on the mode to be selected). [2] The system differs significantly from 'traditional' 4WD systems in that it offers more driven-axle modes in both ...
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When a node hears an RTS from a neighboring node, but not the corresponding CTS, that node can deduce that it is an exposed node and is permitted to transmit to other neighboring nodes. [ 1 ] If the nodes are not synchronised (or if the packet sizes are different or the data rates are different) the problem may occur that the sender will not ...