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Brand: C.OEFT
OE numbers: 6HP21 A065
Product Name: Transmission Valve Body Assembly
Compatible model:
Product status: Remanufactured
Product weight: 5.714KG
Packaging size: 63X41X36cm
Product packaging: Neutral Packaging
Car Series: for BMW
Car Type: Germany
The transmission valve body assembly is the core hydraulic control unit of an automatic transmission, and its functions can be summarized into the following core modules:
1.Core Function: Hydraulic Shift Control
① Conversion of Electrical Signals to Hydraulic Commands
·Receives signals from the Transmission Control Unit (TCU) and adjusts the direction, pressure, and flow of hydraulic oil through solenoid valves to drive shift actuators (such as clutches and brakes) to complete gear shifting.
·For example: When the vehicle speed increases, hydraulic oil pushes the valve core to move and switches the oil circuit to achieve an upshift.
② Dynamic Transmission Ratio Adjustment
·Automatically adjusts the transmission ratio according to parameters such as engine load and vehicle speed to optimize power output and fuel economy.
2.Collaborative System Functions
① Linkage with Torque Converter
· Controls the engagement/disengagement of the lock-up clutch and locks the torque converter at high speeds to reduce power loss.
② Collaboration with Planetary Gear System
·Drives the planetary gear set through oil circuit distribution to achieve torque amplification and multi-gear speed change.
3. Additional Protection and Optimization
① Fault Protection Mechanism
· Automatically restricts the oil circuit in case of abnormalities to prevent shift impact or mechanical damage.
② Improvement of Emissions and Driving Experience
·Smooth shifting reduces engine emission pollution and at the same time reduces the driver's operational burden.
The transmission valve body assembly is a critical component in automatic transmissions, responsible for regulating hydraulic pressure and directing fluid flow to control gear shifts. Its advantages include:
1. Precision Control and Efficient Transmission
① High-Precision Hydraulic Regulation
·Adopts precision-machined valve cores and oil passage designs, with error controlled at the micrometer level, ensuring accurate hydraulic oil flow paths and achieving millisecond-level shift response and smooth power connection.
·Linear solenoid valves enable stepless oil pressure adjustment, reducing shift impact by more than 40%.
② Intelligent Shift Logic
·The valve body integrated with ECU can dynamically adjust the transmission ratio according to vehicle speed and load, optimizing fuel economy and reducing emissions.
2. Material and Durability Advantages
① Application of High-Strength Materials
·Aviation-grade aluminum alloy or hard anodizing process resists high temperatures (120°C) and corrosion, with a service life of up to 150,000-200,000 kilometers.
·Compared with traditional plastic valve bodies, the wear rate of metal materials is reduced by more than 60%.
② Adaptability to Extreme Environments
The modular design supports operation in a wide temperature range from -40°C to 120°C, and the oil self-cleaning system can reduce oil sludge accumulation.
3.Integration and Maintenance Convenience
① Space and Performance Optimization
·The highly integrated design saves engine compartment space while shielding electromagnetic interference.
·The labyrinth-type oil passage layout enables precise control under multiple working conditions and improves transmission efficiency.
② Enhanced Maintainability
·Modular components support separate replacement (such as solenoid valves and sealing rings), reducing maintenance costs by 40%.
·The bolted connection structure is easy to disassemble, shortening maintenance
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