Operating principle of Honda automatic transmission solenoids
Honda automatic transmission solenoids are solenoid valves that are used to control the flow of fluid in the transmission. They are an integral part of an automatic transmission as they allow ratios to be changed and gears to be changed without driver intervention.
Job:
* When the solenoid is energized, the electromagnetic coil creates a magnetic field.
* The magnetic field attracts the metal core of the solenoid.
* The solenoid core opens or closes the hydraulic passage in the valve body.
* Opening or closing hydraulic passages controls the flow of transmission fluid to various parts of the transmission.
*A change in fluid flow causes a change in gear ratio or switching on/off of various transmission components.
Types of solenoids in Honda automatic transmission:
Honda automatic transmissions use several types of solenoids with different functions:
* Torque Converter Lockup Solenoid: Locks the torque converter to improve transmission efficiency at higher speeds.
* Gear Select Solenoid: Controls the gear ratio by redirecting fluid to the appropriate passages in the valve body.
*Clutch Solenoid: Engages/disengages the clutch, which transmits torque to the various shafts and gears in the transmission.
*Line Pressure Solenoid: Regulates transmission fluid pressure for smooth shifting and component protection.
*Line Pressure Solenoid: Controls the overall fluid pressure in various parts of the transmission, affecting shift characteristics.
Solenoid control:
Honda automatic transmission solenoids are controlled by the electronic transmission control module (TCM). The TCM takes input from speed sensors, throttle position sensors, and other vehicle components to determine when and how to shift gears. When the TCM decides to change gear, it sends an electrical signal to the appropriate solenoid, which causes the hydraulic passages to open or close and change fluid flow.