018CHA Automatic Transmission CVT Applicable To The 1.0B Gearbox Assembly Of Chery Tiggo 4Pro
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Function: Belt-driven CVT with adaptive pressure control for 1.0L turbo engines (156Nm torque capacity).
Key Features:
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Pushbelt Design: Bosch Van Doorne-type steel bands (9mm width for compact packaging)
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Electronic Cooling Valve: Regulates fluid flow based on TCU temp readings
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Shift Logic: Simulates 7-step "stepped" ratios for driver familiarity
Failure Modes:
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Belt Slippage: Low pulley pressure (P17F0, often from clogged filter)
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Pulley Sensor Fault: Causes erratic ratio changes (P2817)
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Auxiliary Pump Wear: Start-stop system strain leads to delayed engagement
Critical Maintenance:
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Fluid: Chery CVT-J4 only (every 60k km)
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Adaptation Reset: Required after fluid service
Pro Tip: Monitor pulley ratio PID – deviation >8% from commanded indicates belt wear.

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