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Brand: C.OEFT
OE numbers:85420-60070
Product Name:Transmission Valve
Compatible model: /
Product status: Remanufactured
Product weight:0.5KG
Packaging size: 15*7.5*6 cm
Product packaging: Neutral Packaging
Car Series: Japanese
Car Type: for Toyota Lexus
1. Gear-Shifting Oil Circuit Control for Smooth Engagement
The 85420-60070 solenoid valve serves as the "core executor" for the transmission’s internal oil circuit switching, directly controlling the on-off of oil passages connected to different clutches and brakes. When the TCU detects a gear-shifting demand (e.g., shifting from 2nd gear to 3rd 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—this opens the oil passage leading to the 3rd gear clutch and adjusts the oil discharge speed of the 2nd gear clutch via a linked pressure relief structure, ensuring the 2nd gear clutch disengages gradually while the 3rd gear clutch engages smoothly.
For example, in a Toyota Camry (8th generation) equipped with the 6-speed AT (A760E transmission, to which the 85420-60070 solenoid valve is adapted), when accelerating from 40 km/h to 60 km/h, the TCU activates this solenoid valve. It precisely controls the hydraulic oil flow to the 3rd gear clutch, filling the clutch oil chamber within 0.22 seconds and completing the gear shift with a jerking amplitude of less than 4 m/s²—far below the industry average of 8 m/s². When de-energized, the built-in high-elasticity return spring quickly resets the spool, closing the target oil circuit to prevent abnormal pressure buildup. This design ensures the transmission’s standby state is stable, with no oil leakage risks even after long-term use.
2. Linear Hydraulic Pressure Regulation for Adaptive Working Conditions
A key functional advantage of the 85420-60070 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, torque transmission efficiency, 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 ±0.06 MPa.
During light-load driving (e.g., constant-speed cruising at 80 km/h in 6th gear), the solenoid valve reduces the clutch pressure to 0.8-1.1 MPa, minimizing friction loss between the clutch plates and reducing the vehicle’s fuel consumption by approximately 8% compared to fixed-pressure control. When under heavy load (e.g., full-load uphill or rapid acceleration), it increases the pressure to 2.0-2.3 MPa, ensuring the clutch plates are tightly engaged to avoid slipping and torque loss—critical for Toyota’s high-torque engine models (such as those with 2.5L naturally aspirated engines). For low-temperature cold starts (below -20℃), the solenoid valve maintains a low pressure (0.5-0.7 MPa) for 40 seconds to allow the clutch plates to "run-in" and warm up, preventing clutch damage caused by excessive cold friction. This addresses the common issue of poor low-temperature shifting in automatic transmissions and extends the clutch’s service life.
1. Wide Compatibility with Toyota and Joint-Venture Models
The 85420-60070 solenoid valve is a dedicated component for Toyota’s mainstream 6-speed automatic transmissions, widely used in Toyota’s global models and domestic Sino-Toyota joint-venture vehicles, covering a variety of vehicle types and power configurations:
Toyota Global Model Adaptation: Fully compatible with Toyota’s global models equipped with 6-speed ATs (such as the A760E/A761E transmission), including the Camry, Avalon, RAV4, and Highlander. Its electrical parameters (coil resistance: 10.8±0.3 Ω, operating voltage: 12V DC) and structural dimensions (installation hole spacing: 23±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 FAW Toyota’s Camry, Avalon, RAV4 荣放 (RAV4 Rongfang), and GAC Toyota’s Highlander, Levin. These joint-venture models adhere to Toyota’s global quality standards, and the 85420-60070 solenoid valve passes Toyota’s rigorous validation tests (including a 10,000-hour high-temperature durability test, 12,000-cycle pressure impact test, and -40℃ to 140℃ extreme temperature cycle test). This ensures reliable operation in diverse climate conditions across China, from the cold northeast to the hot and humid south.
Power Matching Flexibility: It can adapt to different engine power versions of Toyota’s 6-speed AT. For low-power models (e.g., 2.0L naturally aspirated engines with 178 HP), the maximum pressure is calibrated to 1.9 MPa; for high-power models (e.g., 2.5L naturally aspirated engines with 209 HP), the maximum pressure is optimized to 2.3 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 85420-60070 solenoid valve’s valve body is made of high-strength aluminum alloy (ADC12) through precision die-casting and surface anti-corrosion treatment (chromate passivation). It can withstand long-term immersion in Toyota’s dedicated ATF (Automatic Transmission Fluid, such as WS ATF) and high-temperature environments (up to 140℃) without deformation or corrosion. The spool is made of high-hardness stainless steel (SUS304) and undergoes precision grinding, with a surface roughness of Ra 0.02 μm—ensuring smooth movement and low wear even after 300,000 kilometers of use. The sealing ring uses fluororubber (FKM) with excellent oil resistance and high-temperature resistance, which can maintain good sealing performance at -40℃ to 200℃, avoiding oil leakage (a key cause of transmission pressure instability and clutch damage).
Anti-Pollution and Anti-Jamming Optimization: The oil circuit of Toyota’s 6-speed AT is highly sensitive to impurities, so the 85420-60070 solenoid valve’s oil inlet is integrated with a 10 μm high-precision filter screen (filtration efficiency ≥99.5%). 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 Toyota’s standard contamination test (adding 25 mg/L of metal debris to ATF), the solenoid valve maintains stable pressure regulation for 450 hours without jamming or pressure deviation—ensuring reliable operation in harsh working environments (such as frequent stop-and-go urban driving).
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