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Brand: C.OEFT
OE numbers: 35290-52040，3529052040
Product Name:Transmission Valve
Compatible model:U340E，U341E
Product status: Remanufactured
Product weight:0.574KG
Packaging size: 15X7.5X6 cm
Product packaging: Neutral Packaging
Car Series: Japanese
Car Type: for Toyota Lexus
1. Oil Circuit On-Off and Switching Control
After receiving the electrical signal from the Transmission Control Unit (TCU), the solenoid valve generates a magnetic field through the electromagnetic coil to drive the spool displacement, accurately controlling the opening and closing of the internal oil circuits of the transmission. During the gear-shifting process, it can quickly switch the oil circuit connection states of different clutches and brakes to realize the mechanical linkage of gear-shifting actions. For example, in the automatic transmission of the Toyota Corolla 1.8L model, it ensures the accurate switching of P/R/N/D gears by controlling the on-off of different oil circuits. This control is based on the direct-acting working principle. When de-energized, the spring force pushes the spool to reset, ensuring the stability of the initial state of the oil circuit.
2. Linear Pressure Regulation Function
As a linear control solenoid valve, its core function is to dynamically adjust the oil circuit pressure. At the moment of gear shifting, the TCU adjusts the duty cycle of the coil current to change the opening degree of the spool, thereby accurately controlling the flow rate and pressure of the hydraulic oil. This linear regulation capability can effectively buffer the gear-shifting impact. For instance, during the low-speed gear shifting of small vehicles such as the Vios and Yaris, it controls the pressure fluctuation within an extremely small range to avoid jerking and improve driving smoothness. Meanwhile, the stable pressure regulation performance of the solenoid valve also ensures the constant pressure control in the neutral and gear-engaged states.
3. Fault Safety Protection Function
The solenoid valve adopts a normally closed design. When de-energized, the spool blocks the main oil circuit under the action of the spring force, preventing accidental gear shifting or power interruption of the transmission in case of circuit faults. This "power-off protection" feature is highly compatible with the safety logic of the transmission. For example, when the vehicle encounters a circuit abnormality, the solenoid valve quickly cuts off the non-essential oil circuits and locks the transmission in a safe gear, reducing driving risks.
1. Wide Vehicle Model Adaptability
This solenoid valve achieves cross-regional adaptation for Toyota's global models, covering the full range of products from family cars to crossover models:
Chinese Market: Adaptable to major models such as FAW Toyota Vios/Yaris (from 2023 model year), Corolla EX (from 2007 model year), and VIOS FS (from 2013 model year);
Global Market: Covers EU-version Corolla (TUP/UKP series), Yaris GR (from 2020 model year), US-version Prius C (2011-2021 models), as well as Japan's domestic Sienta and RaiZE models;
Adaptable Transmission Types: Optimized for automatic transmissions of Toyota's small-displacement models, especially suitable for front-wheel drive transmission systems with a displacement of 1.8L and below.
2. High Responsiveness and Low Loss Performance
Millisecond-Level Action Speed: The electromagnetic coil can complete the spool displacement within tens of milliseconds after being energized, which is much faster than the response speed of traditional mechanical valves. This rapid response ensures that the gear-shifting action is completed within 0.2 seconds, and combined with the pressure regulation function, it achieves "seamless gear shifting";
Energy-Saving and Low-Power Consumption Design: The coil is made of high-efficiency magnetic conductive materials, with power consumption reduced by more than 30% compared with ordinary solenoid valves. Moreover, it can automatically maintain the valve position in the stable working state, realizing "zero power consumption in static state". Taking the Toyota Yaris as an example, it can reduce the annual power consumption of the transmission control system by approximately 5-8 kWh.
3. Reliability in Extreme Environments
Sealing and Leak-Proof Technology: It adopts a fully sealed structure with a magnetic isolation sleeve, which completely isolates the spool movement from the external environment and thoroughly solves the problem of external leakage of dynamic seals. Internally, it achieves precise cooperation between the O-ring and the valve seat, controlling the internal leakage to the zero-leakage level. This design enables it to withstand long-term immersion in transmission oil and high-temperature corrosion (operating temperature range: -40℃ to 120℃);
Anti-Pollution Capability: The spool is made of wear-resistant cast iron material, and combined with high-precision valve port processing, it can withstand the long-term scouring of a small amount of impurities in the transmission oil. In multi-road condition models such as the Urban Cruiser, its service life can reach more than 200,000 kilometers.
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