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Brand: C.OEFT
OE numbers:35290-34010,35290-50010
EAProduct Name: Transmission Valve
Compatible model:A750E A750F
Product status: Remanufactured
Product weight: 0.2 KG
Packaging size: 15X7.5X6 cm
Product packaging:Neutral Package
Car Series:Japanese
Car Type: for Toyota
1. Hydraulic Pressure Regulation: The "Precision Switch" for Transmission Power Transmission
As the core execution component of the transmission hydraulic system, the core function of the 35290-34010 solenoid valve is to adjust the pressure and flow of hydraulic oil according to the instructions from the transmission control unit (TCU):
Clutch/Brake Control: By adjusting the oil pressure applied to the transmission clutch plates and brake friction plates, it controls the timing and force of their engagement and disengagement. For example, during the upshifting process, the solenoid valve gradually reduces the oil pressure of the clutch to be disengaged while increasing the oil pressure of the clutch to be engaged, achieving smooth power switching; during rapid acceleration and downshifting, it quickly increases the brake oil pressure to ensure rapid shift response and avoid power interruption;
Valve Body Oil Circuit Switching: Some models of the 35290-34010 solenoid valve (such as on-off solenoid valves) can realize on-off control of the oil circuit, switching the direction of the internal hydraulic oil circuit of the transmission, and cooperating with the movement of the planetary gear set to achieve shifting between different gears (e.g., when shifting from 1st gear to 2nd gear, driving the locking state of the planet carrier and sun gear by switching the oil circuit).
2. Shift Timing Control: Ensuring Shifting Smoothness and Power Response
After calculating the optimal shift timing based on signals from the engine speed sensor, vehicle speed sensor, throttle position sensor, etc., the TCU sends a pulse width modulation (PWM) signal to the 35290-34010 solenoid valve:
PWM Signal Parsing: The solenoid valve adjusts the stroke of the valve core by identifying PWM signals with different duty cycles (duty cycle range: 5%-95%), thereby controlling the oil pressure. For example, the higher the duty cycle, the stronger the electromagnetic attraction, the larger the valve core opening, and the higher the oil pressure;
Shift Process Optimization: At the moment of shifting, the solenoid valve quickly adjusts the oil pressure to precisely match the engagement force of the clutch/brake with the engine output torque, avoiding impact and shock caused by too fast engagement or slip and wear caused by too slow engagement. Meanwhile, during low-speed creeping (such as following cars in traffic jams), it controls the clutch in a semi-engaged state through low oil pressure to achieve stable vehicle starting and reduce the risk of stalling.
1. High Efficiency and Energy Saving to Reduce Vehicle Fuel Consumption
The 35290-34010 solenoid valve achieves energy-saving effects through two major designs:
Low-Power Electromagnetic Coil: Using a high-permeability iron core and optimized coil winding method, the operating current is only 0.8-1.2 A, reducing power consumption by more than 30% compared with traditional solenoid valves and lowering the generator load;
Precise Oil Pressure Matching: Based on engine speed, vehicle speed, and load signals, it adjusts the oil pressure of the transmission clutch and brake in real time, increasing power transmission efficiency by 5%-8%. According to actual vehicle tests, models equipped with this solenoid valve can reduce fuel consumption by 0.3-0.5 L per 100 kilometers, with more significant energy-saving effects especially in urban traffic congestion.
2. Wide Adaptability, Compatible with Multiple Vehicle Transmission Systems
This solenoid valve is designed based on the hydraulic control module of mainstream automatic transmissions (AT). By optimizing the interface size and installation method, it can be compatible with 6AT and 8AT transmissions (such as A760E and A960E series transmissions) of multiple models under brands like Toyota and Lexus. Meanwhile, its electrical interface adopts industry-standard waterproof connectors, adapting to the transmission control unit (TCU) communication protocols of different vehicle models, without the need for major modifications to the vehicle control system, reducing the adaptation cost of vehicle manufacturers and the difficulty of parts universality in after-sales maintenance.
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