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Brand: C.OEFT
OE numbers: 8G45
Product Name: Transmission Valve Body
Compatible model:
Product status: Remanufactured
Product weight: 5.594KG
Packaging size: 63X41X36cm
Product packaging: Neutral Packaging
Car Series: for BMW
Car Type: Germany
1.Fluid Pressure Regulation
·It uses a network of valves, springs, and passages to control the hydraulic pressure of transmission fluid. This pressure is essential for engaging or disengaging clutches, bands, and other internal components that facilitate gear changes.
2.Gear Shift Control
·By directing fluid to specific clutches or bands based on inputs (e.g., driver throttle, vehicle speed, and engine load), the valve body determines when and how the transmission shifts between gears (e.g., from 1st to 2nd, or into reverse).
3.Modulating Shift Smoothness
·It adjusts pressure and fluid flow rates to ensure transitions between gears are smooth, reducing jerking or harshness that could damage components or discomfort passengers.
4.Adapting to Driving Conditions
·In modern transmissions, electronic control modules (ECMs) work with the valve body to optimize shifts for different scenarios, such as sport mode (faster shifts) or eco mode (fuel-efficient shifts).
5.Preventing Overpressure
·Safety valves within the body limit maximum pressure, protecting the transmission from damage caused by excessive hydraulic force.
The transmission valve body is a critical component in automatic and semi-automatic transmissions, responsible for regulating fluid flow, controlling gear shifts, and ensuring smooth power transfer. Its key advantages include:
1.Enhanced Shift Accuracy and Timing
·A well-engineered valve body precisely controls the timing and pressure of hydraulic fluid delivery to transmission components, ensuring gears shift at optimal moments. This minimizes delay (shift lag) and improves responsiveness to driver inputs, such as accelerating or decelerating.
2.Smoother Gear Transitions
·By regulating fluid pressure and flow rates, it softens the engagement and disengagement of clutches and bands, reducing harshness or jerking during shifts. This not only enhances driving comfort but also lowers mechanical stress on the transmission.
3.Improved Durability and Reliability
·High-quality valve bodies, often crafted with robust materials (e.g., hardened steel) and precision-machined passages, resist wear from hydraulic fluid friction and high operating temperatures. This extends the overall lifespan of the transmission.
4.Optimized Fuel Efficiency
·Efficient fluid management ensures that gear shifts occur in a way that keeps the engine operating within its most fuel-efficient RPM range. This, in turn, reduces unnecessary fuel consumption, especially in adaptive or eco-focused transmission systems.
5.Adaptability to Driving Conditions
·In conjunction with electronic control units (ECUs), modern valve bodies can adjust shift patterns to suit different scenarios—such as sport mode (faster, more aggressive shifts) or economy mode (softer, fuel-saving shifts)—enhancing versatility.
6.Protection Against Damage
·Built-in safety valves prevent excessive hydraulic pressure, safeguarding internal transmission components (e.g., seals, clutches) from overloading and potential failure.
7.Reduced Maintenance Needs
·A properly functioning valve body minimizes strain on other transmission parts, lowering the risk of premature wear and reducing the frequency of repairs or replacements.
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