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Brand: C.OEFT
OE numbers: 46313-4J200
Product Name:Transmission Valve
Compatible model: /
Product status: Remanufactured
Product weight:0.163KG
Packaging size: 15*7.5*6 cm
Product packaging: Neutral Packaging
Car Series: Korean
Car Type: For Hyundai and Kia
1. Multi-Gear Oil Circuit Switching for Seamless Shifting
The 46313-02280 solenoid valve adopts a multi-gear dedicated oil circuit design (covering 3rd-6th gears for 6AT, 4th-8th gears for 8AT) to achieve precise control of clutch/brake engagement during high-gear shifting. When the TCU detects a gear-shifting demand (e.g., 5th-6th gear shift in 6AT during highway acceleration), it sends a pulsed electrical signal to the solenoid valve’s coil. The coil generates a magnetic field in milliseconds, driving the spool to move axially—this opens the oil passage to the 6th gear clutch and adjusts the 5th gear clutch’s oil discharge rate via a linked throttle valve, ensuring the 5th gear clutch disengages at a "gradient deceleration" rate while the 6th gear clutch engages gradually.
For example, in a Hyundai Tucson (4th generation) equipped with the 6AT transmission (A6MF1, to which the 46313-02280 solenoid valve is adapted), when accelerating from 80 km/h to 110 km/h, the TCU coordinates this solenoid valve to complete the 5th-6th gear shift. The entire process takes 0.23 seconds, with a jerking amplitude of less than 5.5 m/s²—lower than the 7 m/s² industry average for mass-market 6AT models. When de-energized, the high-elasticity return spring (stiffness 15 N/mm) resets the spool in 12 ms, closing the target oil circuit to prevent residual pressure from causing abnormal clutch drag, ensuring the transmission’s standby state is stable.
2. Adaptive Linear Pressure Regulation for Multi-Working Conditions
A key functional advantage of the 46313-02280 solenoid valve lies in its adaptive pressure regulation capability, which balances shifting smoothness, torque transmission, and fuel economy across diverse scenarios (urban stop-and-go, highway cruising, heavy-load climbing). It adopts a semi-closed-loop control mode: the TCU adjusts the coil current duty cycle (0%-100%) based on vehicle speed, engine load, and oil temperature, controlling the clutch/brake oil chamber pressure with an accuracy of ±0.07 MPa—matching the performance of mid-range solenoid valves while maintaining cost advantages.
During urban light-load driving (e.g., 40 km/h constant speed in 4th gear), the solenoid valve reduces the clutch pressure to 0.9-1.2 MPa, minimizing friction loss between clutch plates and reducing fuel consumption by about 6% compared to fixed-pressure control. Under heavy-load conditions (e.g., full-load uphill at 60 km/h), it increases the pressure to 2.0-2.3 MPa, ensuring the clutch engages tightly to avoid slipping (a common issue in low-cost AT transmissions). For low-temperature cold starts (below -20℃), the solenoid valve activates the "pre-lubrication mode": it maintains a pressure of 0.6-0.8 MPa for 40 seconds, allowing the clutch plates to pre-warm through slight friction, solving the problem of "hard shifting" in cold weather that plagues many mass-market Korean models.
1. Wide Compatibility with Hyundai-Kia Mass-Market Models
The 46313-02280 solenoid valve is a dedicated component for Hyundai-Kia’s mainstream 6AT and entry-level 8AT transmissions, widely used in compact and mid-size models across global and domestic markets:
Global Model Adaptation: Fully compatible with Hyundai’s Elantra (7th generation), Tucson (4th generation), Kia’s K3 (3rd generation), and Sportage (5th generation) equipped with 6AT (A6MF1/A6MF2) and entry-level 8AT (A8MF1) transmissions. Its electrical parameters (coil resistance: 11.0±0.4 Ω, operating voltage: 12V DC) and structural dimensions (installation hole spacing: 23.5±0.1 mm) perfectly match the original valve body, requiring no modification during replacement—ensuring consistent performance with factory parts.
Domestic Joint-Venture Adaptation: In China, it is a standard component for Beijing Hyundai’s Elantra, Tucson L, and Dongfeng Yueda Kia’s K3, Sportage Ace. These models adhere to Hyundai-Kia’s global quality standards, and the 46313-02280 solenoid valve passes rigorous validation tests: 8,000-hour high-temperature durability test (135℃), 10,000-cycle pressure impact test (0.1-2.8 MPa), and -40℃ to 135℃ extreme temperature cycle test—ensuring reliable operation in China’s diverse climates (from cold Heilongjiang to hot Hainan).
Power Matching Flexibility: It adapts to low-to-medium power engines (1.5L NA to 1.6T turbo) by adjusting pressure curves. For 1.5L NA models (e.g., Elantra 1.5L), the maximum pressure is calibrated to 2.0 MPa; for 1.6T models (e.g., Tucson L 1.6T), it is optimized to 2.3 MPa. This adjustment only requires TCU program modification (no structural changes), avoiding the need for multiple solenoid valve variants and reducing inventory pressure for repair shops.
2. Durable Material and Cost-Effective Craftsmanship
Balanced Material Selection: The valve body is made of high-strength aluminum alloy (A380) through precision die-casting—this material has good machinability and corrosion resistance, withstanding long-term immersion in Hyundai-Kia’s dedicated ATF (SP-IV) without deformation. The surface is treated with a single-layer chromate passivation coating, which balances anti-corrosion performance and cost (30% lower coating cost than double-layer solutions) while ensuring no rust after 300,000 kilometers of use. The spool is made of SUS430 stainless steel with precision grinding (surface roughness Ra 0.025 μm), reducing friction by 20% compared to ordinary steel spools. The sealing ring uses nitrile rubber (NBR) with oil resistance—cost-effective and reliable, maintaining sealing performance at -40℃ to 150℃.
Efficient Manufacturing Process: The product adopts Hyundai-Kia’s "Lean Production" process, with key dimensions controlled by CNC machining centers (accuracy ±0.003 mm) to ensure consistency. The coil is wound with 0.21 mm high-purity copper wire (purity 99.95%) using automatic winding machines, ensuring stable electrical performance. After assembly, each solenoid valve undergoes 100% pressure testing (0.1-2.8 MPa) and leakage testing (leakage rate ≤0.2 mL/min)—achieving a 99.5% pass rate while keeping production costs 15% lower than premium solenoid valves.
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