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Brand: C.OEFT
OE numbers: K112
Product Name: Transmission Valve Body Assembly
Compatible model:
Product status: Remanufactured
Product weight: 4.842KG
Packaging size: 63X41X36cm
Product packaging: Neutral Packaging
Car Series: Japanese
Car Type: for Toyota Corolla
1.Precise 3-Speed Shift Control
Through 3 groups of core solenoid valves (SL1-SL3), it drives the C1-C2 clutches and B1 brake to realize the switching of 3 forward gears and 1 reverse gear: SL1 controls the C1 clutch (power transmission for 1st/3rd gears), SL2 controls the C2 clutch (power transmission for 2nd gear), and SL3 controls the B1 brake (reverse gear and gear locking). Combined with the "miniature vehicle gear ratio optimization" of the planetary gear set (1st gear ratio: 3.9, 2nd gear ratio: 2.2, 3rd gear ratio: 1.1), it balances starting power (meeting the starting needs of 2 people + a small amount of luggage) and low-speed cruising (engine speed is within 2000rpm when the vehicle speed is 60km/h), adapting to urban short-distance commuting and travel around communities.
2.Simple Adaptive Oil Pressure Regulation
The SLT solenoid valve (integrated into the SL3 solenoid valve) dynamically adjusts the main line pressure according to the engine throttle opening (load signal) and vehicle speed: it decreases to 0.5MPa at idle (to reduce energy consumption) and increases to 1.0-1.2MPa during rapid acceleration (to ensure power); the ATF pressure switch feeds back oil pressure data every 10ms, forming a basic closed-loop control. The pressure fluctuation during shifting is less than 0.1MPa, ensuring smooth shifting without obvious jitter and balancing control accuracy with the cost needs of miniature vehicles.
3.Shift Logic for Short-Distance Scenarios
Equipped with "short-distance commuting mode" (default mode): When the vehicle speed < 40km/h, upshifting is delayed (e.g., the speed for shifting from 1st to 2nd gear is 18km/h, and from 2nd to 3rd gear is 35km/h) to improve low-speed power response, adapting to following vehicles in urban congestion; when the vehicle speed > 40km/h, upshifting is advanced (the speed for shifting from 2nd to 3rd gear is reduced to 32km/h) to lower the engine speed, reduce noise and energy consumption, and adapt to short-distance cruising scenarios in suburban areas (such as going to nearby supermarkets or parks).
1.Precise Matching for Small-Displacement Power
The K112 is specifically designed for ultra-small-displacement naturally aspirated engines (0.8L-1.2L), with the maximum operating pressure of the valve body optimized to 1.2MPa. It perfectly meets the core needs of miniature commuter vehicles for "low power and short-distance commuting". Compared with peer valve bodies in the same class, its power transmission efficiency is improved by 3%. When matched with miniature vehicles equipped with a 1.0L engine (such as Wuling Hongguang MINIEV and Changan Lumin), the starting acceleration response time is shortened by 0.2 seconds, and the comprehensive fuel consumption is reduced by 1.5%-2.5% (taking a 1.0L vehicle as an example, the fuel consumption per 100 kilometers is reduced from 6.2L to less than 6.0L), accurately adapting to high-frequency scenarios such as urban short-distance commuting, grocery shopping, and picking up children.
2.Adaptability for Ultra-Small Space
Adopting an "ultra-simple single-valve body" structure with all redundant auxiliary valves removed, the overall volume is only 70% of that of the JF020E, measuring 220mm (length) × 140mm (width) × 100mm (height), and the weight is controlled between 40-45kg, 10% lighter than peer valve bodies for miniature vehicles. It can be easily adapted to the "miniaturized" engine compartment layout of miniature vehicles. Meanwhile, the mounting holes of the valve body adopt a modular design, which can be compatible with the transmission housings of mainstream miniature vehicles without modifying the vehicle body structure, reducing the modification cost for automobile manufacturers and meeting the mass production needs of miniature vehicles.
3.Streamlined Design for Cost Control and Efficiency
The number of core solenoid valves is streamlined to 3 groups (SL1-SL3), reducing 2 auxiliary solenoid valves. At the same time, an "integrated oil circuit" design is adopted (integrating 4 independent oil circuits into 2 main oil circuits), reducing the number of components by 20% compared with peer valve bodies in the same class and lowering production costs by 25%. The production process uses a semi-automated assembly line, increasing the yield rate to 99.2% and further controlling manufacturing costs, making the terminal product price 15% lower than that of peers, adapting to the "high cost-effectiveness" market positioning of miniature commuter vehicles.
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