SEARCH FOR YOUR PRODUCT
Brand: C.OEFT
OE numbers: 0BH325025-JD
Product Name: Transmission Mechatronic Assembly
Compatible model:
Product status: Remanufactured
Product weight:12.372KG
Packaging size: 63X41X36cm
Product packaging: Neutral Packaging
Car Series: for Volkswagen
Car Type: Gemany
1. Wet Clutch Hydraulic Control System
As the core of DQ500 transmission operation, the assembly adopts a full closed-loop hydraulic control algorithm tailored for wet clutch structures. It integrates a high-pressure gear pump (maximum pressure 18 MPa) and 12 precision solenoid valves, collecting real-time signals from 18 sensors (including clutch temperature, oil pressure, input/output shaft speed, and gear position sensors) . Data processing relies on a triple-core Infineon AURIX TC275 MCU (operating frequency up to 200 MHz)—3 times the processing capability of the 6T45E's single-core chip.
High-Torque Clutch Engagement: The assembly controls the hydraulic pressure gradient to 0.12 MPa/10 ms when engaging the clutch. For example, when the Audi S3 accelerates from a standstill, it adjusts the pressure of clutch K1 (responsible for 1/3/5/7 gears) from 0 to 12 MPa in 80 ms, ensuring smooth transmission of 400 N·m peak torque without slip ;
Wet Clutch Cooling Management: Equipped with a variable-flow oil supply module, it adjusts the cooling oil flow rate (0.8-2.5 L/min) based on clutch temperature. When the temperature exceeds 120℃ (e.g., during continuous mountain climbing), it increases flow by 40% and activates the transmission oil cooler fan, preventing overheating— a key advantage over dry DQ200 transmissions ;
Dynamic Torque Distribution: For 4MOTION four-wheel drive models (e.g., Audi Q5L), the assembly coordinates with the Haldex coupling via CAN bus, distributing torque between front and rear axles in real time. When accelerating on slippery roads, it reduces clutch engagement speed by 20% and increases pressure holding time by 150 ms to avoid torque shock.
2. High-Speed Gearshift Execution Mechanism
Leveraging the DQ500's "pre-engagement" gear design , the 0BH325025-JD assembly achieves millisecond-level gear shifts through precise control of hydraulic shift forks. Its shift logic is optimized for both performance and comfort, balancing the needs of daily driving and sporty scenarios.
Rapid Shift Response: In Sport mode, the assembly completes 1-2 gear shifts in 0.2 seconds and skip shifts (e.g., 5-3) in 0.35 seconds. When the Volkswagen Golf R accelerates at full throttle, it maintains consecutive shifts without power interruption, achieving 0-100 km/h acceleration in 4.7 seconds;
Comfort-Oriented Shift Calibration: In Normal mode, it reduces the hydraulic pressure change rate by 30% during shifts. For the Audi A4L 45 TFSI, shifting from 3rd to 4th gear at 60 km/h produces a jerk amplitude of less than 2.0 m/s²—comparable to the 6T45E's comfort level;
Load-Adaptive Shift Timing: Detected by the torque sensor (load > 450 N·m), the assembly delays upshifting (e.g., shifting from 4th to 5th gear at 90 km/h instead of 70 km/h) for the Volkswagen Amarok carrying a 1-ton load, preventing frequent gear hunting.
1. Industry-Leading High-Torque Adaptability
Torque Handling Capacity: Supports maximum input torque of 600 N·m, compatible with Volkswagen's EA888 2.0T high-power, EA288 3.0T TDI, and other high-performance engines—covering 90% of Volkswagen's mid-to-high-end models;
Structural Optimization: The wet clutch design (clutches immersed in ATF oil ) reduces wear by 60% compared to dry DQ200, extending the assembly's service life to 240,000 km under normal use;
4WD System Synergy: Pre-calibrated for Haldex and Torsen differential systems, it achieves torque distribution response time of < 100 ms—critical for off-road and performance models.
2. Balanced Performance and Comfort
Dual-Mode Shift Calibration: Switchable between Sport (rapid shifts, delayed upshifting) and Comfort (smooth engagement, early upshifting) modes, meeting both driving fun and family use needs;
Low Noise Operation: The hydraulic shift mechanism and wet clutch design reduce operating noise by 8-12 dB at high speeds (120 km/h) compared to dry DQ200, creating a quieter cabin environment;
Power Interruption Elimination: Through alternating clutch engagement (one disengages while the other engages ), it eliminates power gaps during shifts—outperforming traditional AT transmissions in acceleration continuity.
3. Robust Durability and Environmental Adaptability
Extreme Condition Resistance: The aluminum alloy housing with IP6K7 protection level resists corrosion (1,000-hour salt spray test) and high temperatures (-40℃ to 160℃), adapting to cold plateaus and high-temperature deserts;
Oil Quality Monitoring: Built-in oil viscosity and impurity sensors trigger an instrument panel reminder when oil quality deteriorates (impurity content > 0.3%), preventing failures from overdue oil changes—more sensitive than the 6T45E's mileage-based reminder;
Reliability Testing: Undergoes 15,000-hour high-torque durability testing (500 N·m continuous load) and 8,000-cycle cold start testing (-30℃), with a mean time between failures (MTBF) exceeding 1.8 million hours.
INQUIRE NOW 
