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The valve body is responsible for hydraulic control in the automatic transmission. The solenoids can work on a higher frequency, and this can help in faster gear changing. Their main function is to manage the hydraulic valves in the valve body by allowing the transmission fluid to flow under specific pressure.
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The solenoids are electrohydraulic valves, and they are the executive elements of the control unit in the mechatronic. From the gathered information, the control unit is able to optimise and equally execute the program for gear changing and, at the same time, monitor for errors in the electronics and mechanics. The control units collect and analyse data about the current condition of the mechatronics and fluid via speed sensors, temperature sensors, and pressure sensors. Whether it's a VW mechatronic unit or an Audi mechatronic unit you have, the parts will generally include the following: The mechatronic unit evaluates the selection of data, from which it recognises whether the gearbox needs to change from first to second gear, for example. The unit processes the sensor signal, operates the valves, measures the RPMs, and slides of the hydraulic gear mechanism. This results in smooth shifting without any interruption of the tractive force. The electronic control unit is made up of sensors and valves (actuators) in one single component with the main function of opening one clutch and closing the other at the right moment.
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The dual-clutch transmission consists of two sub gearboxes, each with its clutch, that work together to shift the gear. This unique advanced dual-clutch automatic transmission is found in many cars, but mostly Audis and Volkswagens. Simply put, the mechatronic unit is a computerised control part of the dual-clutch system. The gearbox’s control unit is in constant communication with the engine control unit, and this helps determine the right time when changing gear. It is capable of performing shift operations in a second. Its task is to manage the torque converter and the clutch pad of the gearbox via the transmission fluid under specific pressure. It is found in the gearbox where we have the direct-shift gear oil (DSG). A mechatronic unit is the control centre of the gearbox.