Gearbox air valve Double H valve 09 models WG2203250003 WG2203250015 for HW19710 Sinotruk howo truck spare parts

Introduction gearbox air valve double H valve 

Working principle

Air circuit control: The double H valve distributes and controls the compressed air received from the vehicle's air source system. When the driver operates the gearbox shift lever to switch between high and low gears, the shift control mechanism triggers the double H valve to operate. The double H valve has a precise air path channel and valve core structure inside, which can guide the compressed air to the corresponding high and low gear cylinders or air chambers in the gearbox according to the shift signal.
Position feedback: The double H valve also has a certain position feedback function. It can feedback to the vehicle's control system (such as the transmission control unit) whether it is currently in a high gear or a low gear state through the internal mechanical structure or sensor (if configured), so that the system can accurately monitor the working state of the gearbox and ensure the accuracy and safety of the shift operation.

Application scope of transmission air valve double H valve

These two double H valves are mainly suitable for 09 specific models of transmissions, which may be used in the transmission systems of some heavy commercial vehicles or special vehicles. These vehicles usually need to frequently switch between high and low gears to adapt to different driving conditions, such as full-load starting, climbing (requiring high torque in low gear) and high-speed driving (requiring high gear). Double H valve can effectively ensure that the transmission can achieve accurate and fast high and low gear conversion under these complex conditions, thereby improving the vehicle's power perforce and fuel economy.