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Brand: C.OEFT
OE numbers: U150E U151E U250E
Product Name: Transmission valve body assembly
Compatible model:
Product status: Remanufactured
Product weight:4.249KG
Packaging size: 63X41X36cm
Product packaging: Neutral Packaging
Car Series:Japanese
Car Type: for Toyota Lexus
1. Central Control of AT Hydraulic System
As the "hydraulic command center" of the AT transmission, the U150E/U151E/U250E valve bodies precisely control the flow direction, pressure, and flow rate of hydraulic oil through built-in components such as pressure valves, flow valves, and solenoid valves. When the TCU issues a gear shifting command, the valve bodies quickly switch the oil circuit (oil circuit response time ≤50ms for U150E/U151E, ≤55ms for U250E), driving the torque converter lock-up clutch and the clutches/brake bands of the planetary gear set to act, realizing precise multi-gear shifting. They are core components ensuring "power-interruption-free" transmission of the AT, which guarantees smooth power transmission from the engine to the wheels and avoids power jams caused by gear shifting deviations.
In "Economy Mode", the U150E/U151E shift up 150-250rpm in advance, and the U250E shifts up 200-300rpm in advance, targeting the lowest engine speed to prioritize fuel efficiency.
In "Sport Mode", all three valve bodies delay shifting by 200-350rpm, maintaining a high-speed range (2800-4200rpm). The U250E, which is adapted for higher power needs, extends the high-speed maintenance range to 2500-4500rpm to achieve "explosive" acceleration.
They support "Manual Mode" (simulating 6-8 fixed gears) and accurately respond to the driver's shifting operations (response delay ≤90ms for U150E/U151E, ≤100ms for U250E). At the same time, they are equipped with a gear protection function (e.g., prohibiting shifting up when the speed exceeds 6500rpm, and prohibiting engaging gears above 3rd when the vehicle speed is below 5km/h) to avoid overload damage to the AT planetary gear set.
1. Exclusive Adaptation for Toyota AT Models, OEM-Level Universal Compatibility
As core control components for specific Automatic Transmission (AT) systems in Toyota models (such as Corolla, Camry, RAV4, etc.), the U150E, U151E, and U250E transmission valve bodies are developed in strict compliance with Toyota's original factory technical specifications. The oil passage layout of the valve plate and spool stroke are fully synchronized with the torque converters and planetary gear sets of the three transmissions, and their interface specifications are seamlessly compatible with the Transmission Control Unit (TCU).
The three valve bodies maintain the commonality of core parameters in structural design, with some vulnerable parts being interchangeable. Meanwhile, the oil pressure adjustment range is optimized according to the power requirements of different models (e.g., the U250E is adapted for vehicles with larger displacements). They can be directly installed without additional modifications, effectively avoiding problems such as oil leakage and gear shifting jams caused by non-adaptive valve bodies, and ensuring that the AT transmission regains its original transmission efficiency. They are particularly suitable for scenarios such as replacing old valve bodies and troubleshooting repairs, and can operate stably without repeated debugging after installation.
2. Precise Hydraulic Control for Multi-Gears, Enhanced AT Shifting Smoothness
Targeting the characteristic of "synergistic transmission of multi-planetary gear sets" of AT transmissions, all three valve bodies adopt a combined design of multiple sets of high-precision solenoid valves (8 sets for U150E/U151E, 10 sets for U250E) and stepped pressure regulating valves. They can real-time capture parameters such as engine load, vehicle speed, and throttle opening, and fine-tune the hydraulic oil pressure with an accuracy of ±0.15MPa.
Compared with ordinary valve bodies, the gear shifting response speed is increased by 22%: the U150E/U151E can complete 4-5 gear shifts within 80-200 milliseconds, and the U250E maintains a response speed of 100-220 milliseconds when adapted for 6-speed transmission, significantly reducing the "jitter" during low-speed shifting of AT transmissions. At the same time, by optimizing the hydraulic control logic of the clutches/brake bands of the planetary gear sets, power interruption during shifting is avoided. Whether it is frequent start-stops in urban congested road conditions or gear shifts during high-speed cruising, a "shock-free" smooth driving experience can be maintained, meeting the dual comfort needs of household and commercial vehicles.
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