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Brand: C.OEFT
OE numbers:46313-2F300
EAProduct Name: Transmission Valve
Compatible model:/
Product status: Remanufactured
Product weight: 0.3 KG
Packaging size: 15X7.5X6 cm
Product packaging:Neutral Package
Car Series:Korean
Car Type: For Hyundai Kia
1. Gear-Shifting Oil Circuit Switching for Smooth Gear Engagement
The 46313-2F300 solenoid valve acts as the "switch core" for the transmission’s internal oil circuits, directly controlling the on-off of oil passages leading to different clutches and brakes. When the TCU detects a gear-shifting demand (e.g., shifting from 3rd gear to 4th gear in a 6-speed AT), it sends a pulsed electrical signal to the solenoid valve’s coil. The coil instantly generates a magnetic field, driving the spool to move axially and opening the oil passage to the 4th gear clutch. At the same time, it adjusts the oil discharge rate of the 3rd gear clutch through a linked pressure relief valve, ensuring the 3rd gear clutch disengages gradually while the 4th gear clutch engages smoothly.
For example, in a Hyundai Elantra (7th generation) equipped with the 6-speed AT (to which the 46313-2F300 solenoid valve is adapted), when accelerating from 50 km/h to 70 km/h, the TCU activates this solenoid valve. It precisely controls the hydraulic oil flow to the 4th gear clutch, filling the clutch oil chamber within 0.2 seconds and completing the gear shift with a 顿挫 (jerking) amplitude of less than 5 m/s²—far below the industry average of 8 m/s². When de-energized, the built-in return spring quickly resets the spool, closing the target oil circuit to prevent abnormal pressure buildup, ensuring the transmission’s standby state is stable and free from oil leakage risks.
2. Linear Hydraulic Pressure Regulation for Adaptive Working Conditions
A key functional advantage of the 46313-2F300 solenoid valve lies in its high-precision linear pressure regulation capability, which dynamically adjusts hydraulic pressure according to driving conditions (light load, heavy load, cold start) to balance shifting smoothness and fuel economy. It adopts a proportional control mode: the TCU adjusts the duty cycle of the coil current (0%-100%) to change the spool’s opening degree, controlling the hydraulic oil pressure in the clutch/brake oil chamber with an accuracy of ±0.07 MPa.
During light-load driving (e.g., constant-speed cruising at 90 km/h in 6th gear), the solenoid valve reduces the clutch pressure to 0.9-1.2 MPa, minimizing friction loss between the clutch plates and reducing the vehicle’s fuel consumption by approximately 7% compared to fixed-pressure control. When under heavy load (e.g., full-load uphill or rapid acceleration), it increases the pressure to 2.1-2.4 MPa, ensuring the clutch plates are tightly engaged to avoid slipping and torque loss. For low-temperature cold starts (below -18℃), the solenoid valve maintains a low pressure (0.6-0.8 MPa) for 35 seconds to allow the clutch plates to "run-in" and warm up, preventing clutch damage caused by excessive cold friction—addressing the common issue of poor low-temperature shifting in 韩系 (Korean) transmissions.
1. Wide Compatibility with Hyundai-Kia and Joint-Venture Models
The 46313-2F300 solenoid valve is a dedicated component for Hyundai-Kia’s mainstream 6-speed automatic transmissions, widely used in Hyundai, Kia, and domestic Sino-Korean joint-venture models, covering a variety of vehicle types and power configurations:
Hyundai-Kia Global Model Adaptation: Fully compatible with Hyundai’s Elantra, Sonata, Tucson, and Kia’s K3, K5, Sportage equipped with the 6-speed AT (e.g., Hyundai’s A6MF2 transmission). Its electrical parameters (coil resistance: 11.2±0.3 Ω, operating voltage: 12V DC) and structural dimensions (installation hole spacing: 24±0.1 mm) perfectly match the original transmission valve body, requiring no modification during replacement—ensuring consistent performance with the original factory solenoid valve.
Domestic Joint-Venture Adaptation: In China, it is a standard component for Beijing Hyundai’s Elantra, Sonata, Tucson, and Dongfeng Yueda Kia’s K3, K5, Sportage. These joint-venture models adhere to Hyundai-Kia’s global quality standards, and the 46313-2F300 solenoid valve passes Hyundai-Kia’s rigorous validation tests (including a 9,000-hour high-temperature durability test, 11,000-cycle pressure impact test, and -40℃ to 135℃ extreme temperature cycle test), ensuring reliable operation in diverse climate conditions across China.
Power Matching Flexibility: It can adapt to different engine power versions of Hyundai-Kia’s 6-speed AT. For low-power models (e.g., 1.6L naturally aspirated engines with 123 HP), the maximum pressure is calibrated to 2.0 MPa; for high-power models (e.g., 2.0T turbocharged engines with 240 HP), the maximum pressure is optimized to 2.4 MPa. This adjustment only requires modifying the TCU’s control program (no structural changes to the solenoid valve), avoiding the need for developing multiple models and reducing inventory pressure for repair shops and manufacturers.
2. High Reliability and Extreme Environment Durability
High-Quality Material Selection: The 46313-2F300 solenoid valve’s valve body is made of high-strength aluminum alloy (A380) through precision die-casting and surface anti-corrosion treatment (anodic oxidation). It can withstand long-term immersion in Hyundai-Kia’s dedicated ATF (Automatic Transmission Fluid, such as SP-IV) and high-temperature environments (up to 135℃) without deformation or corrosion. The spool is made of high-hardness stainless steel (SUS430) and undergoes precision grinding, with a surface roughness of Ra 0.025 μm—ensuring smooth movement and low wear even after long-term use. The sealing ring uses nitrile rubber (NBR) with excellent oil resistance and high-temperature resistance, which can maintain good sealing performance at -40℃ to 150℃, avoiding oil leakage (a key cause of transmission pressure instability).
Anti-Pollution and Anti-Jamming Optimization: The oil circuit of Hyundai-Kia’s 6-speed AT is highly sensitive to impurities, so the 46313-2F300 solenoid valve’s oil inlet is integrated with a 12 μm high-precision filter screen (filtration efficiency ≥99.2%). It can block metal chips, sludge, and other impurities in the ATF from entering the valve body and causing spool jamming. Additionally, the valve body’s internal oil passage is designed with a smooth arc transition (no right-angle bends), reducing oil flow turbulence and preventing impurity accumulation. In Hyundai-Kia’s standard contamination test (adding 28 mg/L of metal debris to ATF), the solenoid valve maintains stable pressure regulation for 380 hours without jamming or pressure deviation—ensuring reliable operation in harsh working environments.
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