CVT System Description - Hydraulic Controls

Hydraulic Controls 

The hydraulic control system is controlled by the transmission fluid pump, the valves, and the solenoid valves. The transmission fluid pump is driven by the engine. The transmission fluid pump drive sprocket is connected to the torque converter cover (pump), turns as the engine turns, and drives the transmission fluid pump driven sprocket with the transmission fluid pump drive chain. The transmission fluid pump supplies hydraulic pressure to the hydraulic circuit. Fluid from the transmission fluid pump passes through the one way valve and the PH regulator valve to the various valves, pulleys, clutch, and reverse brake.

The lower valve body assembly include the main valve body, the secondary valve body, the linear solenoid valve body, the clutch reducing valve body, and the transmission fluid pump. These valve bodies are installed on the transmission housing, in the transmission.

Main Valve Body 

The main valve body contains the TC check valve, the LC shift valve, the LC control valve, the shift inhibitor valve, and the accumulator valve.

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Secondary Valve Body 

The secondary valve body contains the CVT clutch pressure control solenoid valve and the CVT lock-up clutch control solenoid valve.

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Linear Solenoid Valve Body 

The linear solenoid valve body contains the CVT drive pulley pressure control solenoid valve, CVT driven pulley pressure control solenoid valve, the PH regulator valve, the one way valve, the drive pulley regulator valve, the driven pulley regulator valve, the accumulator valve, and the PH control shift valve.

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Clutch Reducing Valve Body 

The clutch reducing valve body contains shift solenoid valve B, the modulator valve, the relief valve, the CR valve, and the TC regulator valve.

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Transmission Fluid Pump 

The transmission fluid pump contains the vane-type pump, the shift solenoid valve O/P, and the pump shift valve.

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Manual Valve Body 

The manual valve body contains the manual valve. The manual valve body is bolted on the stator shaft flange in the transmission housing.

Courtesy of HONDA, U.S.A., INC.