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Brand: C.OEFT
OE numbers: A960
Product Name: Transmission Valve Body Assembly
Compatible model:
Product status: Remanufactured
Product weight: 6.886KG
Packaging size: 63X41X36cm
Product packaging: Neutral Packaging
Car Series: Japanese
Car Type: for Toyota Crown 2.5
1. Central Control of High-End AT Hydraulic System
As the "hydraulic command core" of the A960 transmission, the valve body precisely controls the flow direction, pressure, and flow rate of hydraulic oil through 42 sets of precision valves including built-in main pressure valves, shift valves, lock-up control valves, and quietness regulating valves, realizing "refined management" of the torque converter and planetary gear set:
Torque converter lock-up control: During high-speed cruising (vehicle speed > 85km/h), it controls the lock-up clutch engagement pressure (20-25MPa), with a lock-up rate of over 99%. At the same time, through "flexible lock-up" technology (pressure fluctuation controlled within ±0.3MPa), mechanical noise during the lock-up moment is reduced, and transmission efficiency is improved (the measured transmission efficiency reaches 95%-97%, leading the high-end AT industry);
Planetary gear set control: After receiving the TCU command, it completes oil circuit switching within 40 milliseconds and drives the clutch/brake band to act in coordination (for example, when shifting from 2nd to 3rd gear, the time difference between the disengagement of the K2 clutch and the engagement of the K3 clutch is controlled within 0.05 seconds), realizing "zero power interruption" transmission. This ensures that engine power is smoothly transmitted to the wheels, avoiding noise and vibration caused by shifting deviations.
2. Scenario-Based Intelligent Gear Adjustment for Luxury Vehicles
Combining the diverse driving needs of luxury vehicles for "business, sport, and comfort", the valve body supports multi-mode dynamic shifting strategies to adapt to different usage scenarios:
Normal Mode: Balances power and quietness, shifts to 5th gear at 60km/h and 6th gear at 100km/h. The engine operates at 1,800-2,200rpm, and the shifting interval is controlled within 1.2-1.5 seconds;
Sport Mode: Delays upshifting by 300-400rpm, maintaining a high-power speed range of 4,000-5,500rpm. During rapid acceleration, it supports "skip-gear downshifting" (e.g., directly shifting from 6th to 3rd gear at 80km/h) to improve power response.
1. Precise High-Torque Hydraulic Control, Adapted to Quiet Transmission of Luxury Vehicles
Targeting the "maximum bearing torque of 550N·m" characteristic of the A960 transmission (adapted to high-end engines such as Lexus 3.5L V6 and Toyota 5.7L V8), the valve body adopts a combined design of 14 sets of high-precision proportional solenoid valves (PWM control frequency of 220Hz) and a four-stage pressure regulating valve. It can real-time capture dynamic parameters such as engine torque, vehicle speed, throttle opening, and driving mode (Normal/Sport/Eco/Luxury), and fine-tune the hydraulic oil pressure with an accuracy of ±0.04MPa. Compared with ordinary luxury vehicle valve bodies, the shifting response speed is increased by 35%, and the shifting delay from 2nd to 6th gear is controlled within 50-160 milliseconds. Through the dual mechanism of "oil pressure pre-charging + linear buffering", the "mechanical impact feeling" during low-speed (25-45km/h) shifting is completely eliminated — for example, when shifting from 3rd to 4th gear, the oil pressure is pre-charged to 15-18MPa first, then linearly increased to 22MPa at a rate of 0.5MPa/0.1s to achieve "imperceptible shifting". Even under conditions of rapid acceleration (throttle opening > 95%) and high-speed cruising (130km/h), the noise inside the transmission compartment can be controlled below 55 decibels (8-10 decibels lower than ordinary valve bodies), adapting to the dual needs of luxury vehicles for quietness and driving texture.
2. Durable Material & Craftsmanship for High Load, Adapted to Long-Term High-Frequency Use of Luxury Vehicles
Considering that luxury vehicles often face complex usage scenarios such as "high-frequency start-stops in cities, long-distance high-speed cruising, and low-temperature alpine environments", the valve body enhances "fatigue resistance", "corrosion resistance", and "low-temperature adaptability" in materials and craftsmanship:
Core valve plate: High-strength A383 die-cast aluminum alloy is used, undergoing T8 heat treatment (solution temperature of 540℃ + age hardening + stabilization treatment) and surface ceramic composite coating (coating thickness of 15-18μm). Its hardness is increased to over HV900, which can withstand high-frequency oil pressure impacts of 45MPa. The deformation of the valve body under long-term high-load use is controlled within 0.01mm, effectively resisting wear caused by repeated oil circuit scouring (main oil passage wear ≤ 0.005mm per 100,000km);
Internal spool: SUS440C stainless steel base material + diamond-like carbon (DLC) multi-layer coating is adopted, reducing the friction coefficient by 50%. In a low-temperature environment of -35℃, the spool movement resistance increases by no more than 8%, eliminating cold-start jamming (the cold-start failure rate in winter in alpine regions of Northeast China is less than 0.08%);
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