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Brand: C.OEFT
OE numbers: DCT270
Product Name: Transmission Valve Body
Compatible model:
Product status: Remanufactured
Product weight: 6.408KG
Packaging size: 63X41X36cm
Product packaging: Neutral Packaging
Car Series: for Changan Automobile
Car Type: Chinese
1. Hydraulic Control Center for Dual Clutches
As the "hydraulic brain" of the DCT270 transmission, it adjusts the oil pressure of the odd-gear and even-gear clutches respectively through two sets of independent clutch control valves. When the TCU issues a shifting command, the valve body quickly switches the oil circuit, controlling one clutch group to disengage while driving the other clutch group to pre-engage, realizing shift operation without power interruption and ensuring the core power transmission function of the transmission.
2. Execution of Intelligent Shifting Logic
It receives real-time data commands from the TCU and automatically optimizes the shifting strategy based on the vehicle's driving status (vehicle speed, load, driving mode). In the "Economy Mode", it shifts up in advance to reduce engine speed and improve fuel efficiency; in the "Sport Mode", it delays shifting to maintain a high-speed range and enhance power output; at the same time, it supports manual shifting mode, accurately responding to the driver's shifting needs, balancing comfort and maneuverability.
3. System Pressure and Flow Management
Built-in pressure regulating valves and flow control valves maintain the stable pressure of the transmission hydraulic system in real time (normal working pressure range: 5~35MPa), avoiding clutch slippage caused by excessive oil pressure or weak shifting caused by insufficient oil pressure. At the same time, through precise control of transmission oil flow, the timeliness and accuracy of spool movement are ensured, reducing shifting delay and improving overall transmission efficiency.
4. Component Protection and Fault Diagnosis
It has multiple protection functions: when detecting that the clutch temperature is too high, it automatically reduces the oil pressure to reduce frictional heat generation; when there is slight blockage in the oil circuit, it maintains the basic shifting function by increasing the flow of the bypass oil circuit, avoiding sudden stop of the transmission. In addition, it can convert the working status of the valve body (such as abnormal oil pressure and spool jamming) into fault codes and transmit them to the TCU, facilitating maintenance personnel to quickly locate problems and reduce maintenance difficulty.
1. Exclusive Dual-Clutch Compatibility, Aligning with DCT270 System Characteristics
As a core control component specifically designed for the DCT270 dual-clutch transmission, it strictly adheres to the hydraulic circuit layout and power transmission logic of this transmission model. The oil passage diameter of the valve body and the spool stroke are precisely matched with the dual-clutch module (odd-gear/even-gear clutches), enabling direct integration without additional adjustments. Its interface specifications are perfectly compatible with the Transmission Control Unit (TCU), allowing it to quickly respond to TCU's shifting commands. This avoids issues such as asynchronous shifting of dual clutches and power interruption caused by non-adaptive valve bodies, ensuring the original performance of the DCT270 transmission.
2. Independent Control of Dual Clutches, Excelling in Both Shifting Efficiency and Smoothness
Adopting a dual-oil-circuit independent control design, it corresponds to the odd-gear clutch and even-gear clutch of the DCT270 transmission respectively, enabling independent oil pressure adjustment and rapid switching of the two clutch groups. Compared with traditional single-oil-circuit valve bodies, the shifting response speed is increased by more than 20%, and it can complete gear pre-engagement and power connection in milliseconds, significantly reducing the low-speed shifting jitter commonly seen in dual-clutch transmissions. At the same time, through precise oil pressure control, the impact during clutch engagement is reduced, balancing shifting efficiency and driving smoothness, which is particularly suitable for frequent start-stop scenarios in urban congested road conditions.
3. High-Pressure-Resistant Materials and Precision Craftsmanship, Outstanding Durability
The core valve plate is formed by integral die-casting of high-strength aluminum alloy, and its surface undergoes nitriding treatment, with hardness increased to over HV800, which can withstand high-frequency oil pressure impacts (maximum pressure resistance up to 35MPa) during the operation of the DCT270 transmission. The internal spool adopts a wear-resistant ceramic coating process, reducing the friction coefficient by 30%, effectively minimizing spool wear during long-term use. In addition, the sealing parts of the valve body are made of fluororubber material that is resistant to high and low temperatures (-40℃~150℃), preventing transmission oil leakage. Compared with ordinary valve bodies, its service life is extended by 40%, meeting the long-term use needs under complex working conditions.
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