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Brand: C.OEFT
OE numbers: 6HP19 A053
Product Name: Transmission Valve Body Assembly
Compatible model:
Product status: Remanufactured
Product weight: 5.678KG
Packaging size: 63X41X36cm
Product packaging: Neutral Packaging
Car Series: Germany
Car Type: for BMW
1. Precise Hydraulic Oil Flow Control
The valve body integrates precision oil passages and multi-stage spools (with a bore diameter of only 0.3 mm, equivalent to the thickness of human eyelashes) inside. It can real-time adjust the direction and flow rate of hydraulic oil according to driving conditions, accurately driving the actions of actuators such as clutches and brakes. Its built-in pressure regulating valve dynamically balances the oil circuit pressure, ensuring that oil film coverage is completed within 0.8 seconds in a low-temperature environment of -15°C, and the kinematic viscosity fluctuation is controlled within ±5% under high-temperature working conditions.
2. Intelligent Gear Shift Execution
Relying on the cooperative mechanism with the Transmission Control Unit (TCU), the valve body can real-time receive signals such as vehicle speed, engine load, and accelerator depth. It switches the oil circuit channels through the shift valve to realize the automatic switching of 6 forward gears and reverse gear. For the E-version valve body, two dedicated solenoid valves (MV2 and MV3) are used to replace the traditional manual valve, further improving the shift response speed.
3. Dynamic Oil Pressure Adaptive Regulation
The main pressure regulating valve and the dedicated valve sleeve form a core regulating unit, which can steplessly adjust the system oil pressure according to different working conditions (such as starting acceleration and high-speed cruising): it reduces oil pressure at low speeds to reduce power loss, and increases oil pressure at high speeds or under heavy loads to ensure transmission rigidity, effectively avoiding shift shocks and power interruption issues.
4. Transmission Safety Protection
It has a built-in overload protection mechanism. When it detects transmission overheating, abnormal oil pressure, or excessive load, it can quickly cut off non-essential oil circuits or limit oil pressure output to prevent serious failures such as clutch ablation and gear tooth breakage. At the same time, its sealing structure can effectively prevent hydraulic oil leakage, ensuring the long-term stable operation of the system.
1. Original Equipment Manufacturer (OEM)-Level Precision Manufacturing Process
As the first-generation benchmark product of the ZF 6HP series, the valve body is manufactured with OEM-level components. The matching accuracy between the internal spools and oil passages reaches the micrometer level. Its classic layout of 6 accumulators (a characteristic of first-generation products) has undergone millions of kilometers of real-vehicle verification. It can adapt to power systems with a maximum torque of 190 N·m and is widely used in classic models such as the BMW X1 E84.
2. All-Working-Condition Adaptive Design
The oil circuit logic is optimized for complex driving environments: narrow oil passage design is used to accelerate oil flow at low temperatures; boron-nitrogen composite additive formula is adopted to reduce the acid value increase by 42% at high temperatures, significantly reducing the risk of spool jamming. It can maintain stable performance from frequent starts and stops in urban congested road conditions to continuous operation during high-speed cruising.
3. Maintenance Adaptability and Reliability
Adopting a modular structure design, core components such as the main pressure regulating valve and shift valve can be inspected and replaced independently. With professional methods such as the vacuum test method, leakage faults can be quickly located. The original remanufactured version has undergone comprehensive testing by the Hardware-in-the-Loop (HIL) system, and parameters such as shift pressure and solenoid valve current are recalibrated and coded. It can be used directly without additional debugging after installation.
4. Cost and Performance Balance Advantage
Compared with the second-generation 7-accumulator design, the 6HP19 A053 has a more mature and simple mechanical structure, resulting in lower maintenance costs. At the same time, through the optimization of ATF (Automatic Transmission Fluid) flow control, the shift time is close to that of the second-generation product, achieving the practical advantage of "undiminished performance and controllable cost".
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