How to Distinguish Between Dry and Wet Dual Clutches?
1 Answers
Methods to distinguish between dry and wet dual clutches are as follows: The primary way to differentiate dry and wet dual clutches is to check whether the clutch friction plates contain lubricating oil. If the clutch friction plates are immersed in lubricating oil, it is a wet type; otherwise, it is a dry type. Additional information: 1. Principle of dry dual clutches: The dual clutch consists of three closely spaced clutch plates coaxially stacked together. The two clutch plates at each end are connected to gears 1, 3, 5, 7 and 2, 4, 6, reverse gear respectively. The central disc moves between them, engaging or disengaging with the two clutch plates to perform gear shifts. Unlike the DQ250, this "dual clutch" is not housed in a sealed oil chamber. The dry friction plates on the moving disc provide the most direct power transmission efficiency but are more prone to heat generation. Therefore, their thermal resistance is inferior to wet clutches, and they can only handle relatively lower torque. The 7-speed DQ200 has a maximum torque capacity of 250 Nm and is typically paired with small-displacement engines. 2. Principle and structure of wet dual clutches: Wet dual clutches refer to two sets of multi-plate clutches, one large and one small, coaxially assembled together. They are housed in a sealed chamber filled with hydraulic oil, giving wet clutches better adjustability and superior thermal resistance, allowing them to transmit higher torque. Due to design and friction material considerations, wet dual clutches are larger in size than dry dual clutches, which complicates the arrangement of the vehicle's powertrain. 3. Advantages and disadvantages of dual clutch friction plates: In wet dual clutch transmissions, the friction plates are submerged in transmission oil, which provides cooling and lubrication, enabling them to handle greater loads. However, because more space is required to accommodate the transmission oil and related control mechanisms, wet dual clutch friction plates are larger in size and more complex in structure, leading to reduced power transmission efficiency. On the other hand, dry dual clutch transmissions are simpler in structure and more efficient in power transmission due to the absence of these components. However, the downside is that the lack of cooling from transmission oil makes the clutch friction plates more susceptible to overheating and burning out, thus limiting the maximum torque they can transmit.
