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Brand: C.OEFT
OE numbers: 7DCT300
Product Name:Transmission Sensor
Compatible model:
Product status: New
Product weight: 0.0448KG
Packaging size: 7*4*4 cm
Product packaging: Neutral Packaging
Car Series: Chinese
Car Type: For Great Wall Motors
1. Pressure Sensors: Hydraulic System Regulation
Line Pressure Sensor: Installed in the main oil circuit, it monitors the system pressure (4.1-12.5 kg/cm²) and feeds data to the TCM to adjust the pressure control solenoid. This prevents clutch slippage during full-throttle acceleration and reduces energy loss at idle.
Clutch Pressure Sensor: Mounted on the clutch actuator cylinder, it precisely controls the engagement/disengagement pressure in 0.01 MPa increments, ensuring a shift time of within 0.25 seconds—critical for the 7DCT300's smooth shifting performance.
Oil Filter Pressure Differential Sensor: Detects the pressure drop across the filter (triggering a warning when the pressure drop exceeds 1.2 kg/cm²), preventing oil circuit blockage and component wear caused by contaminated oil.
2. Position and Speed Sensors: Gear Control Accuracy
Gear Position Sensor: Utilizes non-contact Hall-effect technology to detect the position of the shift fork, with a positioning error of less than 0.1mm. It ensures accurate gear engagement and prevents mis-shifting, which is essential for the transmission's NVH (Noise, Vibration, Harshness) performance (noise level <65dB at 1000rpm).
Input/Output Shaft Speed Sensor: Adopts an electromagnetic induction design with a measurement range of 0-8000 rpm and an accuracy of ±10 rpm. It calculates the speed difference between the shafts to optimize clutch engagement timing, improving the transmission's efficiency by 8-10% during cruising.
1.High-Precision Sensing for Efficient Transmission Control
The OEM sensors for Great Wall's 7DCT300 wet dual-clutch transmission feature a multi-component integrated design, with key pressure sensors sourced from Bosch (e.g., SMD284 series), ensuring a measurement accuracy of within ±0.5% FS. These sensors monitor line pressure, clutch engagement pressure, and oil circuit pressure in real time, with a response time of less than 10ms—enabling the TCM (Transmission Control Module) to adjust hydraulic control parameters instantly. For instance, the clutch pressure sensor maintains pressure stability between 3.2-11.8 kg/cm² during gear shifts, reducing shift shock by 35% compared to aftermarket alternatives. This precision directly supports the transmission's overall efficiency of over 96%, ensuring optimal power delivery for 1.5T engines.
2. Original Factory Matching for Platform Compatibility
OEM sensors are fully calibrated with the 7DCT300's TCM and powertrain system, perfectly matching Great Wall models such as Haval Big Dog, H6, and WEY Lanshan. Unlike universal aftermarket sensors, they come with custom pin definitions and communication protocols, eliminating compatibility issues like false fault codes or signal delays. The gear position sensor, for example, adopts a Hall-effect design with 12-bit resolution to accurately identify 7 forward gears and 1 reverse gear, ensuring a gear engagement accuracy of 99.9%. This matching is crucial for the transmission's hybrid expansion capability (supporting P0/P4 hybrid systems), as it maintains stable communication with hybrid powertrain controllers.
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